merge unbound 1.20.0

67 files changed, 11851 insertions, 6639 deletions

diff --git a/usr.sbin/unbound/Makefile.in b/usr.sbin/unbound/Makefile.in
index 1c4f5fe8581..a8cf50d4c03 100644
--- a/usr.sbin/unbound/Makefile.in
+++ b/usr.sbin/unbound/Makefile.in
@@ -1279,7 +1279,8 @@ daemon.lo daemon.o: $(srcdir)/daemon/daemon.c config.h $(srcdir)/daemon/daemon.h
  $(srcdir)/util/edns.h $(srcdir)/services/listen_dnsport.h $(srcdir)/services/cache/rrset.h \
  $(srcdir)/services/cache/infra.h $(srcdir)/util/rtt.h $(srcdir)/services/localzone.h \
  $(srcdir)/services/authzone.h $(srcdir)/services/mesh.h $(srcdir)/services/rpz.h $(srcdir)/respip/respip.h \
- $(srcdir)/util/random.h $(srcdir)/util/tube.h $(srcdir)/util/net_help.h $(srcdir)/sldns/keyraw.h
+ $(srcdir)/util/random.h $(srcdir)/util/tube.h $(srcdir)/util/net_help.h $(srcdir)/sldns/keyraw.h \
+ $(srcdir)/iterator/iter_fwd.h $(srcdir)/iterator/iter_hints.h
 remote.lo remote.o: $(srcdir)/daemon/remote.c config.h $(srcdir)/daemon/remote.h $(srcdir)/daemon/worker.h \
  $(srcdir)/libunbound/worker.h $(srcdir)/sldns/sbuffer.h $(srcdir)/util/data/packed_rrset.h \
  $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h $(srcdir)/util/log.h $(srcdir)/util/netevent.h \
@@ -1356,7 +1357,7 @@ testbound.lo testbound.o: $(srcdir)/testcode/testbound.c config.h $(srcdir)/test
  $(srcdir)/util/data/msgparse.h $(srcdir)/sldns/pkthdr.h $(srcdir)/sldns/rrdef.h $(srcdir)/util/tube.h \
  $(srcdir)/services/mesh.h $(srcdir)/services/rpz.h $(srcdir)/services/localzone.h $(srcdir)/services/view.h \
  $(srcdir)/services/authzone.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/libunbound/unbound.h \
- $(srcdir)/respip/respip.h $(srcdir)/util/net_help.h $(srcdir)/util/ub_event.h
+ $(srcdir)/respip/respip.h $(srcdir)/util/net_help.h $(srcdir)/util/ub_event.h $(srcdir)/daemon/worker.h
 testpkts.lo testpkts.o: $(srcdir)/testcode/testpkts.c config.h $(srcdir)/testcode/testpkts.h \
  $(srcdir)/util/net_help.h $(srcdir)/util/log.h $(srcdir)/sldns/sbuffer.h $(srcdir)/sldns/rrdef.h $(srcdir)/sldns/pkthdr.h \
  $(srcdir)/sldns/str2wire.h $(srcdir)/sldns/wire2str.h
@@ -1429,7 +1430,7 @@ fake_event.lo fake_event.o: $(srcdir)/testcode/fake_event.c config.h $(srcdir)/t
  $(srcdir)/util/tube.h $(srcdir)/services/mesh.h $(srcdir)/services/modstack.h $(srcdir)/services/rpz.h \
  $(srcdir)/services/localzone.h $(srcdir)/services/view.h $(srcdir)/sldns/sbuffer.h $(srcdir)/services/authzone.h \
  $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/libunbound/unbound.h $(srcdir)/respip/respip.h \
- $(srcdir)/sldns/wire2str.h $(srcdir)/sldns/str2wire.h $(srcdir)/daemon/remote.h
+ $(srcdir)/sldns/wire2str.h $(srcdir)/sldns/str2wire.h $(srcdir)/daemon/remote.h $(srcdir)/util/storage/slabhash.h $(srcdir)/daemon/daemon.h
 lock_verify.lo lock_verify.o: $(srcdir)/testcode/lock_verify.c config.h $(srcdir)/util/log.h $(srcdir)/util/rbtree.h \
  $(srcdir)/util/locks.h $(srcdir)/util/fptr_wlist.h $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h \
   $(srcdir)/util/storage/lruhash.h $(srcdir)/util/module.h \
@@ -1485,7 +1486,8 @@ context.lo context.o: $(srcdir)/libunbound/context.c config.h $(srcdir)/libunbou
  $(srcdir)/util/storage/slabhash.h $(srcdir)/services/cache/infra.h $(srcdir)/util/rtt.h \
  $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
  $(srcdir)/services/authzone.h $(srcdir)/services/mesh.h $(srcdir)/services/rpz.h $(srcdir)/daemon/stats.h \
- $(srcdir)/util/timehist.h $(srcdir)/respip/respip.h $(srcdir)/util/edns.h
+ $(srcdir)/util/timehist.h $(srcdir)/respip/respip.h $(srcdir)/util/edns.h \
+ $(srcdir)/iterator/iter_fwd.h $(srcdir)/iterator/iter_hints.h
 libunbound.lo libunbound.o: $(srcdir)/libunbound/libunbound.c $(srcdir)/libunbound/unbound.h \
  $(srcdir)/libunbound/unbound-event.h config.h $(srcdir)/libunbound/context.h $(srcdir)/util/locks.h \
  $(srcdir)/util/log.h $(srcdir)/util/alloc.h $(srcdir)/util/rbtree.h $(srcdir)/services/modstack.h \
@@ -1497,7 +1499,8 @@ libunbound.lo libunbound.o: $(srcdir)/libunbound/libunbound.c $(srcdir)/libunbou
  $(srcdir)/sldns/sbuffer.h $(srcdir)/services/cache/infra.h $(srcdir)/util/rtt.h $(srcdir)/util/netevent.h \
  $(srcdir)/dnscrypt/dnscrypt.h  $(srcdir)/services/cache/rrset.h \
  $(srcdir)/util/storage/slabhash.h $(srcdir)/services/authzone.h $(srcdir)/services/mesh.h \
- $(srcdir)/services/rpz.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/respip/respip.h
+ $(srcdir)/services/rpz.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h $(srcdir)/respip/respip.h \
+ $(srcdir)/iterator/iter_fwd.h $(srcdir)/iterator/iter_hints.h
 libworker.lo libworker.o: $(srcdir)/libunbound/libworker.c config.h $(srcdir)/libunbound/libworker.h \
  $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h $(srcdir)/util/log.h \
  $(srcdir)/libunbound/context.h $(srcdir)/util/alloc.h $(srcdir)/util/rbtree.h $(srcdir)/services/modstack.h \
@@ -1511,8 +1514,7 @@ libworker.lo libworker.o: $(srcdir)/libunbound/libworker.c config.h $(srcdir)/li
  $(srcdir)/services/cache/rrset.h $(srcdir)/util/storage/slabhash.h $(srcdir)/services/outbound_list.h \
  $(srcdir)/util/fptr_wlist.h $(srcdir)/util/tube.h $(srcdir)/util/regional.h $(srcdir)/util/random.h \
  $(srcdir)/util/storage/lookup3.h $(srcdir)/util/net_help.h $(srcdir)/util/data/dname.h \
- $(srcdir)/util/data/msgencode.h $(srcdir)/iterator/iter_fwd.h $(srcdir)/iterator/iter_hints.h \
- $(srcdir)/sldns/str2wire.h
+ $(srcdir)/util/data/msgencode.h $(srcdir)/sldns/str2wire.h
 unbound-host.lo unbound-host.o: $(srcdir)/smallapp/unbound-host.c config.h $(srcdir)/libunbound/unbound.h \
  $(srcdir)/sldns/rrdef.h $(srcdir)/sldns/wire2str.h
 asynclook.lo asynclook.o: $(srcdir)/testcode/asynclook.c config.h $(srcdir)/libunbound/unbound.h \
diff --git a/usr.sbin/unbound/ax_pthread.m4 b/usr.sbin/unbound/ax_pthread.m4
index ff7d2a67e11..9f35d139149 100644
--- a/usr.sbin/unbound/ax_pthread.m4
+++ b/usr.sbin/unbound/ax_pthread.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#        http://www.gnu.org/software/autoconf-archive/ax_pthread.html
+#        https://www.gnu.org/software/autoconf-archive/ax_pthread.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -14,24 +14,28 @@
 #   flags that are needed. (The user can also force certain compiler
 #   flags/libs to be tested by setting these environment variables.)
 #
-#   Also sets PTHREAD_CC to any special C compiler that is needed for
-#   multi-threaded programs (defaults to the value of CC otherwise). (This
-#   is necessary on AIX to use the special cc_r compiler alias.)
+#   Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
+#   needed for multi-threaded programs (defaults to the value of CC
+#   respectively CXX otherwise). (This is necessary on e.g. AIX to use the
+#   special cc_r/CC_r compiler alias.)
 #
 #   NOTE: You are assumed to not only compile your program with these flags,
-#   but also link it with them as well. e.g. you should link with
+#   but also to link with them as well. For example, you might link with
 #   $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+#   $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
 #
-#   If you are only building threads programs, you may wish to use these
+#   If you are only building threaded programs, you may wish to use these
 #   variables in your default LIBS, CFLAGS, and CC:
 #
 #     LIBS="$PTHREAD_LIBS $LIBS"
 #     CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+#     CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
 #     CC="$PTHREAD_CC"
+#     CXX="$PTHREAD_CXX"
 #
 #   In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
-#   has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name
-#   (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#   has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
+#   that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
 #
 #   Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
 #   PTHREAD_PRIO_INHERIT symbol is defined when compiling with
@@ -55,6 +59,7 @@
 #
 #   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
 #   Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+#   Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the
@@ -67,7 +72,7 @@
 #   Public License for more details.
 #
 #   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
 #
 #   As a special exception, the respective Autoconf Macro's copyright owner
 #   gives unlimited permission to copy, distribute and modify the configure
@@ -82,35 +87,41 @@
 #   modified version of the Autoconf Macro, you may extend this special
 #   exception to the GPL to apply to your modified version as well.
 
-#serial 21
+#serial 31
 
 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
 AC_DEFUN([AX_PTHREAD], [
 AC_REQUIRE([AC_CANONICAL_HOST])
+AC_REQUIRE([AC_PROG_CC])
+AC_REQUIRE([AC_PROG_SED])
 AC_LANG_PUSH([C])
 ax_pthread_ok=no
 
 # We used to check for pthread.h first, but this fails if pthread.h
-# requires special compiler flags (e.g. on True64 or Sequent).
+# requires special compiler flags (e.g. on Tru64 or Sequent).
 # It gets checked for in the link test anyway.
 
 # First of all, check if the user has set any of the PTHREAD_LIBS,
 # etcetera environment variables, and if threads linking works using
 # them:
-if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
-        save_CFLAGS="$CFLAGS"
+if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+        ax_pthread_save_CC="$CC"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
+        AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
+        AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        save_LIBS="$LIBS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
-        AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes])
+        AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
+        AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
         AC_MSG_RESULT([$ax_pthread_ok])
-        if test x"$ax_pthread_ok" = xno; then
+        if test "x$ax_pthread_ok" = "xno"; then
                 PTHREAD_LIBS=""
                 PTHREAD_CFLAGS=""
         fi
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CC="$ax_pthread_save_CC"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 fi
 
 # We must check for the threads library under a number of different
@@ -118,12 +129,14 @@ fi
 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
 # libraries is broken (non-POSIX).
 
-# Create a list of thread flags to try.  Items starting with a "-" are
-# C compiler flags, and other items are library names, except for "none"
-# which indicates that we try without any flags at all, and "pthread-config"
-# which is a program returning the flags for the Pth emulation library.
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
 
-ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
 
 # The ordering *is* (sometimes) important.  Some notes on the
 # individual items follow:
@@ -132,82 +145,163 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt
 # none: in case threads are in libc; should be tried before -Kthread and
 #       other compiler flags to prevent continual compiler warnings
 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
-# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
-# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
-# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
-# -pthreads: Solaris/gcc
-# -mthreads: Mingw32/gcc, Lynx/gcc
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+#           (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
-#      doesn't hurt to check since this sometimes defines pthreads too;
-#      also defines -D_REENTRANT)
-#      ... -mt is also the pthreads flag for HP/aCC
+#      doesn't hurt to check since this sometimes defines pthreads and
+#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
+#      is present but should not be used directly; and before -mthreads,
+#      because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
 # pthread: Linux, etcetera
 # --thread-safe: KAI C++
 # pthread-config: use pthread-config program (for GNU Pth library)
 
-case ${host_os} in
+case $host_os in
+
+        freebsd*)
+
+        # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+        # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+
+        ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+        ;;
+
+        hpux*)
+
+        # From the cc(1) man page: "[-mt] Sets various -D flags to enable
+        # multi-threading and also sets -lpthread."
+
+        ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+        ;;
+
+        openedition*)
+
+        # IBM z/OS requires a feature-test macro to be defined in order to
+        # enable POSIX threads at all, so give the user a hint if this is
+        # not set. (We don't define these ourselves, as they can affect
+        # other portions of the system API in unpredictable ways.)
+
+        AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
+            [
+#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+             AX_PTHREAD_ZOS_MISSING
+#            endif
+            ],
+            [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
+        ;;
+
         solaris*)
 
         # On Solaris (at least, for some versions), libc contains stubbed
         # (non-functional) versions of the pthreads routines, so link-based
-        # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
-        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
-        # a function called by this macro, so we could check for that, but
-        # who knows whether they'll stub that too in a future libc.)  So,
-        # we'll just look for -pthreads and -lpthread first:
+        # tests will erroneously succeed. (N.B.: The stubs are missing
+        # pthread_cleanup_push, or rather a function called by this macro,
+        # so we could check for that, but who knows whether they'll stub
+        # that too in a future libc.)  So we'll check first for the
+        # standard Solaris way of linking pthreads (-mt -lpthread).
+
+        ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
+        ;;
+esac
+
+# Are we compiling with Clang?
+
+AC_CACHE_CHECK([whether $CC is Clang],
+    [ax_cv_PTHREAD_CLANG],
+    [ax_cv_PTHREAD_CLANG=no
+     # Note that Autoconf sets GCC=yes for Clang as well as GCC
+     if test "x$GCC" = "xyes"; then
+        AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
+            [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+#            if defined(__clang__) && defined(__llvm__)
+             AX_PTHREAD_CC_IS_CLANG
+#            endif
+            ],
+            [ax_cv_PTHREAD_CLANG=yes])
+     fi
+    ])
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
+
+AS_IF([test "x$GCC" = "xyes"],
+      [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
+
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
+
+AS_IF([test "x$ax_pthread_clang" = "xyes"],
+      [ax_pthread_flags="-pthread,-lpthread -pthread"])
 
-        ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
+
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+
+case $host_os in
+        darwin* | hpux* | linux* | osf* | solaris*)
+        ax_pthread_check_macro="_REENTRANT"
         ;;
 
-        darwin*)
-        ax_pthread_flags="-pthread $ax_pthread_flags"
+        aix*)
+        ax_pthread_check_macro="_THREAD_SAFE"
         ;;
-esac
 
-# Clang doesn't consider unrecognized options an error unless we specify
-# -Werror. We throw in some extra Clang-specific options to ensure that
-# this doesn't happen for GCC, which also accepts -Werror.
+        *)
+        ax_pthread_check_macro="--"
+        ;;
+esac
+AS_IF([test "x$ax_pthread_check_macro" = "x--"],
+      [ax_pthread_check_cond=0],
+      [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
 
-AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags])
-save_CFLAGS="$CFLAGS"
-ax_pthread_extra_flags="-Werror"
-CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])],
-                  [AC_MSG_RESULT([yes])],
-                  [ax_pthread_extra_flags=
-                   AC_MSG_RESULT([no])])
-CFLAGS="$save_CFLAGS"
 
-if test x"$ax_pthread_ok" = xno; then
-for flag in $ax_pthread_flags; do
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
 
-        case $flag in
+        case $ax_pthread_try_flag in
                 none)
                 AC_MSG_CHECKING([whether pthreads work without any flags])
                 ;;
 
+                *,*)
+                PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+                PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+                AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
+                ;;
+
                 -*)
-                AC_MSG_CHECKING([whether pthreads work with $flag])
-                PTHREAD_CFLAGS="$flag"
+                AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+                PTHREAD_CFLAGS="$ax_pthread_try_flag"
                 ;;
 
                 pthread-config)
                 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
-                if test x"$ax_pthread_config" = xno; then continue; fi
+                AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
                 PTHREAD_CFLAGS="`pthread-config --cflags`"
                 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
                 ;;
 
                 *)
-                AC_MSG_CHECKING([for the pthreads library -l$flag])
-                PTHREAD_LIBS="-l$flag"
+                AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
+                PTHREAD_LIBS="-l$ax_pthread_try_flag"
                 ;;
         esac
 
-        save_LIBS="$LIBS"
-        save_CFLAGS="$CFLAGS"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags"
 
         # Check for various functions.  We must include pthread.h,
         # since some functions may be macros.  (On the Sequent, we
@@ -218,8 +312,18 @@ for flag in $ax_pthread_flags; do
         # pthread_cleanup_push because it is one of the few pthread
         # functions on Solaris that doesn't have a non-functional libc stub.
         # We try pthread_create on general principles.
+
         AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
-                        static void routine(void *a) { *((int*)a) = 0; }
+#                       if $ax_pthread_check_cond
+#                        error "$ax_pthread_check_macro must be defined"
+#                       endif
+                        static void *some_global = NULL;
+                        static void routine(void *a)
+                          {
+                             /* To avoid any unused-parameter or
+                                unused-but-set-parameter warning.  */
+                             some_global = a;
+                          }
                         static void *start_routine(void *a) { return a; }],
                        [pthread_t th; pthread_attr_t attr;
                         pthread_create(&th, 0, start_routine, 0);
@@ -227,101 +331,187 @@ for flag in $ax_pthread_flags; do
                         pthread_attr_init(&attr);
                         pthread_cleanup_push(routine, 0);
                         pthread_cleanup_pop(0) /* ; */])],
-                [ax_pthread_ok=yes],
-                [])
+            [ax_pthread_ok=yes],
+            [])
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 
         AC_MSG_RESULT([$ax_pthread_ok])
-        if test "x$ax_pthread_ok" = xyes; then
-                break;
-        fi
+        AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
 
         PTHREAD_LIBS=""
         PTHREAD_CFLAGS=""
 done
 fi
 
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+        # Clang takes -pthread; it has never supported any other flag
+
+        # (Note 1: This will need to be revisited if a system that Clang
+        # supports has POSIX threads in a separate library.  This tends not
+        # to be the way of modern systems, but it's conceivable.)
+
+        # (Note 2: On some systems, notably Darwin, -pthread is not needed
+        # to get POSIX threads support; the API is always present and
+        # active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
+        # -pthread does define _REENTRANT, and while the Darwin headers
+        # ignore this macro, third-party headers might not.)
+
+        # However, older versions of Clang make a point of warning the user
+        # that, in an invocation where only linking and no compilation is
+        # taking place, the -pthread option has no effect ("argument unused
+        # during compilation").  They expect -pthread to be passed in only
+        # when source code is being compiled.
+        #
+        # Problem is, this is at odds with the way Automake and most other
+        # C build frameworks function, which is that the same flags used in
+        # compilation (CFLAGS) are also used in linking.  Many systems
+        # supported by AX_PTHREAD require exactly this for POSIX threads
+        # support, and in fact it is often not straightforward to specify a
+        # flag that is used only in the compilation phase and not in
+        # linking.  Such a scenario is extremely rare in practice.
+        #
+        # Even though use of the -pthread flag in linking would only print
+        # a warning, this can be a nuisance for well-run software projects
+        # that build with -Werror.  So if the active version of Clang has
+        # this misfeature, we search for an option to squash it.
+
+        AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
+            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
+            [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+             # Create an alternate version of $ac_link that compiles and
+             # links in two steps (.c -> .o, .o -> exe) instead of one
+             # (.c -> exe), because the warning occurs only in the second
+             # step
+             ax_pthread_save_ac_link="$ac_link"
+             ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+             ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
+             ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+             ax_pthread_save_CFLAGS="$CFLAGS"
+             for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+                AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
+                CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+                ac_link="$ax_pthread_save_ac_link"
+                AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+                    [ac_link="$ax_pthread_2step_ac_link"
+                     AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+                         [break])
+                    ])
+             done
+             ac_link="$ax_pthread_save_ac_link"
+             CFLAGS="$ax_pthread_save_CFLAGS"
+             AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
+             ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+            ])
+
+        case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+                no | unknown) ;;
+                *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+        esac
+
+fi # $ax_pthread_clang = yes
+
+
+
 # Various other checks:
-if test "x$ax_pthread_ok" = xyes; then
-        save_LIBS="$LIBS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        save_CFLAGS="$CFLAGS"
+if test "x$ax_pthread_ok" = "xyes"; then
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
 
         # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-        AC_MSG_CHECKING([for joinable pthread attribute])
-        attr_name=unknown
-        for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
-            AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
-                           [int attr = $attr; return attr /* ; */])],
-                [attr_name=$attr; break],
-                [])
-        done
-        AC_MSG_RESULT([$attr_name])
-        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
-            AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name],
-                               [Define to necessary symbol if this constant
-                                uses a non-standard name on your system.])
-        fi
-
-        AC_MSG_CHECKING([if more special flags are required for pthreads])
-        flag=no
-        case ${host_os} in
-            aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;
-            osf* | hpux*) flag="-D_REENTRANT";;
-            solaris*)
-            if test "$GCC" = "yes"; then
-                flag="-D_REENTRANT"
-            else
-                # TODO: What about Clang on Solaris?
-                flag="-mt -D_REENTRANT"
-            fi
-            ;;
-        esac
-        AC_MSG_RESULT([$flag])
-        if test "x$flag" != xno; then
-            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
-        fi
+        AC_CACHE_CHECK([for joinable pthread attribute],
+            [ax_cv_PTHREAD_JOINABLE_ATTR],
+            [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+             for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+                 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
+                                                 [int attr = $ax_pthread_attr; return attr /* ; */])],
+                                [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
+                                [])
+             done
+            ])
+        AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+               test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+               test "x$ax_pthread_joinable_attr_defined" != "xyes"],
+              [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
+                                  [$ax_cv_PTHREAD_JOINABLE_ATTR],
+                                  [Define to necessary symbol if this constant
+                                   uses a non-standard name on your system.])
+               ax_pthread_joinable_attr_defined=yes
+              ])
+
+        AC_CACHE_CHECK([whether more special flags are required for pthreads],
+            [ax_cv_PTHREAD_SPECIAL_FLAGS],
+            [ax_cv_PTHREAD_SPECIAL_FLAGS=no
+             case $host_os in
+             solaris*)
+             ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+             ;;
+             esac
+            ])
+        AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+               test "x$ax_pthread_special_flags_added" != "xyes"],
+              [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+               ax_pthread_special_flags_added=yes])
 
         AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
-            [ax_cv_PTHREAD_PRIO_INHERIT], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
-                                                [[int i = PTHREAD_PRIO_INHERIT;]])],
-                    [ax_cv_PTHREAD_PRIO_INHERIT=yes],
-                    [ax_cv_PTHREAD_PRIO_INHERIT=no])
+            [ax_cv_PTHREAD_PRIO_INHERIT],
+            [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
+                                             [[int i = PTHREAD_PRIO_INHERIT;
+                                               return i;]])],
+                            [ax_cv_PTHREAD_PRIO_INHERIT=yes],
+                            [ax_cv_PTHREAD_PRIO_INHERIT=no])
             ])
-        AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"],
-            [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])])
+        AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+               test "x$ax_pthread_prio_inherit_defined" != "xyes"],
+              [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
+               ax_pthread_prio_inherit_defined=yes
+              ])
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 
         # More AIX lossage: compile with *_r variant
-        if test "x$GCC" != xyes; then
+        if test "x$GCC" != "xyes"; then
             case $host_os in
                 aix*)
                 AS_CASE(["x/$CC"],
-                  [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
-                  [#handle absolute path differently from PATH based program lookup
-                   AS_CASE(["x$CC"],
-                     [x/*],
-                     [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
-                     [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+                    [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+                    [#handle absolute path differently from PATH based program lookup
+                     AS_CASE(["x$CC"],
+                         [x/*],
+                         [
+			   AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
+			   AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
+			 ],
+                         [
+			   AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
+			   AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
+			 ]
+                     )
+                    ])
                 ;;
             esac
         fi
 fi
 
 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
 
 AC_SUBST([PTHREAD_LIBS])
 AC_SUBST([PTHREAD_CFLAGS])
 AC_SUBST([PTHREAD_CC])
+AC_SUBST([PTHREAD_CXX])
 
 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test x"$ax_pthread_ok" = xyes; then
+if test "x$ax_pthread_ok" = "xyes"; then
         ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
         :
 else
diff --git a/usr.sbin/unbound/cachedb/cachedb.c b/usr.sbin/unbound/cachedb/cachedb.c
index b912be8ed54..95ac2890469 100644
--- a/usr.sbin/unbound/cachedb/cachedb.c
+++ b/usr.sbin/unbound/cachedb/cachedb.c
@@ -50,6 +50,8 @@
 #include "util/data/msgreply.h"
 #include "util/data/msgencode.h"
 #include "services/cache/dns.h"
+#include "services/mesh.h"
+#include "services/modstack.h"
 #include "validator/val_neg.h"
 #include "validator/val_secalgo.h"
 #include "iterator/iter_utils.h"
@@ -265,15 +267,6 @@ cachedb_init(struct module_env* env, int id)
 		return 0;
 	}
 	cachedb_env->enabled = 1;
-	if(env->cfg->serve_expired && env->cfg->serve_expired_reply_ttl)
-		log_warn(
-			"cachedb: serve-expired-reply-ttl is set but not working for data "
-			"originating from the external cache; 0 TTL is used for those.");
-	if(env->cfg->serve_expired && env->cfg->serve_expired_client_timeout)
-		log_warn(
-			"cachedb: serve-expired-client-timeout is set but not working for "
-			"data originating from the external cache; expired data are used "
-			"in the reply without first trying to refresh the data.");
 	return 1;
 }
 
@@ -511,9 +504,38 @@ adjust_msg_ttl(struct dns_msg* msg, time_t adjust)
 	}
 }
 
+/* Set the TTL of the given RRset to fixed value. */
+static void
+packed_rrset_ttl_set(struct packed_rrset_data* data, time_t ttl)
+{
+	size_t i;
+	size_t total = data->count + data->rrsig_count;
+	data->ttl = ttl;
+	for(i=0; i<total; i++) {
+		data->rr_ttl[i] = ttl;
+	}
+	data->ttl_add = 0;
+}
+
+/* Set the TTL of a DNS message and its RRs by to a fixed value. */
+static void
+set_msg_ttl(struct dns_msg* msg, time_t ttl)
+{
+	size_t i;
+	msg->rep->ttl = ttl;
+	msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
+	msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+
+	for(i=0; i<msg->rep->rrset_count; i++) {
+		packed_rrset_ttl_set((struct packed_rrset_data*)msg->
+			rep->rrsets[i]->entry.data, ttl);
+	}
+}
+
 /** convert dns message in buffer to return_msg */
 static int
-parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
+parse_data(struct module_qstate* qstate, struct sldns_buffer* buf,
+	int* msg_expired)
 {
 	struct msg_parse* prs;
 	struct edns_data edns;
@@ -583,6 +605,7 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
 	adjust = *qstate->env->now - (time_t)timestamp;
 	if(qstate->return_msg->rep->ttl < adjust) {
 		verbose(VERB_ALGO, "cachedb msg expired");
+		*msg_expired = 1;
 		/* If serve-expired is enabled, we still use an expired message
 		 * setting the TTL to 0. */
 		if(!qstate->env->cfg->serve_expired ||
@@ -605,6 +628,7 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
 	 * 'now' should be redundant given how these values were calculated,
 	 * but we check it just in case as does good_expiry_and_qinfo(). */
 	if(qstate->env->cfg->serve_expired &&
+		!qstate->env->cfg->serve_expired_client_timeout &&
 		(adjust == -1 || (time_t)expiry < *qstate->env->now)) {
 		qstate->need_refetch = 1;
 	}
@@ -617,7 +641,8 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf)
  * return true if lookup was successful.
  */
 static int
-cachedb_extcache_lookup(struct module_qstate* qstate, struct cachedb_env* ie)
+cachedb_extcache_lookup(struct module_qstate* qstate, struct cachedb_env* ie,
+	int* msg_expired)
 {
 	char key[(CACHEDB_HASHSIZE/8)*2+1];
 	calc_hash(qstate, key, sizeof(key));
@@ -634,7 +659,7 @@ cachedb_extcache_lookup(struct module_qstate* qstate, struct cachedb_env* ie)
 	}
 
 	/* parse dns message into return_msg */
-	if( !parse_data(qstate, qstate->env->scratch_buffer) ) {
+	if( !parse_data(qstate, qstate->env->scratch_buffer, msg_expired) ) {
 		return 0;
 	}
 	return 1;
@@ -666,6 +691,7 @@ cachedb_extcache_store(struct module_qstate* qstate, struct cachedb_env* ie)
 static int
 cachedb_intcache_lookup(struct module_qstate* qstate, struct cachedb_env* cde)
 {
+	uint8_t dpname_storage[LDNS_MAX_DOMAINLEN+1];
 	uint8_t* dpname=NULL;
 	size_t dpnamelen=0;
 	struct dns_msg* msg;
@@ -674,7 +700,7 @@ cachedb_intcache_lookup(struct module_qstate* qstate, struct cachedb_env* cde)
 		return 0;
 	}
 	if(iter_stub_fwd_no_cache(qstate, &qstate->qinfo,
-		&dpname, &dpnamelen))
+		&dpname, &dpnamelen, dpname_storage, sizeof(dpname_storage)))
 		return 0; /* no cache for these queries */
 	msg = dns_cache_lookup(qstate->env, qstate->qinfo.qname,
 		qstate->qinfo.qname_len, qstate->qinfo.qtype,
@@ -705,17 +731,39 @@ cachedb_intcache_lookup(struct module_qstate* qstate, struct cachedb_env* cde)
  * Store query into the internal cache of unbound.
  */
 static void
-cachedb_intcache_store(struct module_qstate* qstate)
+cachedb_intcache_store(struct module_qstate* qstate, int msg_expired)
 {
 	uint32_t store_flags = qstate->query_flags;
+	int serve_expired = qstate->env->cfg->serve_expired;
 
 	if(qstate->env->cfg->serve_expired)
 		store_flags |= DNSCACHE_STORE_ZEROTTL;
 	if(!qstate->return_msg)
 		return;
+	if(serve_expired && msg_expired) {
+		/* Set TTLs to a value such that value + *env->now is
+		 * going to be now-3 seconds. Making it expired
+		 * in the cache. */
+		set_msg_ttl(qstate->return_msg, (time_t)-3);
+	}
 	(void)dns_cache_store(qstate->env, &qstate->qinfo,
 		qstate->return_msg->rep, 0, qstate->prefetch_leeway, 0,
 		qstate->region, store_flags, qstate->qstarttime);
+	if(serve_expired && msg_expired) {
+		if(qstate->env->cfg->serve_expired_client_timeout) {
+			/* No expired response from the query state, the
+			 * query resolution needs to continue and it can
+			 * pick up the expired result after the timer out
+			 * of cache. */
+			return;
+		}
+		/* set TTLs to zero again */
+		adjust_msg_ttl(qstate->return_msg, -1);
+		/* Send serve expired responses based on the cachedb
+		 * returned message, that was just stored in the cache.
+		 * It can then continue to work on this query. */
+		mesh_respond_serve_expired(qstate->mesh_info);
+	}
 }
 
 /**
@@ -731,6 +779,7 @@ cachedb_handle_query(struct module_qstate* qstate,
 	struct cachedb_qstate* ATTR_UNUSED(iq),
 	struct cachedb_env* ie, int id)
 {
+	int msg_expired = 0;
 	qstate->is_cachedb_answer = 0;
 	/* check if we are enabled, and skip if so */
 	if(!ie->enabled) {
@@ -765,20 +814,28 @@ cachedb_handle_query(struct module_qstate* qstate,
 	}
 
 	/* ask backend cache to see if we have data */
-	if(cachedb_extcache_lookup(qstate, ie)) {
+	if(cachedb_extcache_lookup(qstate, ie, &msg_expired)) {
 		if(verbosity >= VERB_ALGO)
 			log_dns_msg(ie->backend->name,
 				&qstate->return_msg->qinfo,
 				qstate->return_msg->rep);
 		/* store this result in internal cache */
-		cachedb_intcache_store(qstate);
+		cachedb_intcache_store(qstate, msg_expired);
 		/* In case we have expired data but there is a client timer for expired
 		 * answers, pass execution to next module in order to try updating the
 		 * data first.
 		 * TODO: this needs revisit. The expired data stored from cachedb has
 		 * 0 TTL which is picked up by iterator later when looking in the cache.
-		 * Document that ext cachedb does not work properly with
-		 * serve_stale_reply_ttl yet. */
+		 */
+		if(qstate->env->cfg->serve_expired && msg_expired) {
+			qstate->return_msg = NULL;
+			qstate->ext_state[id] = module_wait_module;
+			/* The expired reply is sent with
+			 * mesh_respond_serve_expired, and so
+			 * the need_refetch is not used. */
+			qstate->need_refetch = 0;
+			return;
+		}
 		if(qstate->need_refetch && qstate->serve_expired_data &&
 			qstate->serve_expired_data->timer) {
 				qstate->return_msg = NULL;
@@ -791,6 +848,14 @@ cachedb_handle_query(struct module_qstate* qstate,
 		return;
 	}
 
+	if(qstate->serve_expired_data &&
+		qstate->env->cfg->cachedb_check_when_serve_expired &&
+		!qstate->env->cfg->serve_expired_client_timeout) {
+		/* Reply with expired data if any to client, because cachedb
+		 * also has no useful, current data */
+		mesh_respond_serve_expired(qstate->mesh_info);
+	}
+
 	/* no cache fetches */
 	/* pass request to next module */
 	qstate->ext_state[id] = module_wait_module;
@@ -923,4 +988,36 @@ cachedb_get_funcblock(void)
 {
 	return &cachedb_block;
 }
+
+int
+cachedb_is_enabled(struct module_stack* mods, struct module_env* env)
+{
+	struct cachedb_env* ie;
+	int id = modstack_find(mods, "cachedb");
+	if(id == -1)
+		return 0;
+	ie = (struct cachedb_env*)env->modinfo[id];
+	if(ie && ie->enabled)
+		return 1;
+	return 0;
+}
+
+void cachedb_msg_remove(struct module_qstate* qstate)
+{
+	char key[(CACHEDB_HASHSIZE/8)*2+1];
+	int id = modstack_find(qstate->env->modstack, "cachedb");
+	struct cachedb_env* ie = (struct cachedb_env*)qstate->env->modinfo[id];
+
+	log_query_info(VERB_ALGO, "cachedb msg remove", &qstate->qinfo);
+	calc_hash(qstate, key, sizeof(key));
+	sldns_buffer_clear(qstate->env->scratch_buffer);
+	sldns_buffer_write_u32(qstate->env->scratch_buffer, 0);
+	sldns_buffer_flip(qstate->env->scratch_buffer);
+
+	/* call backend */
+	(*ie->backend->store)(qstate->env, ie, key,
+		sldns_buffer_begin(qstate->env->scratch_buffer),
+		sldns_buffer_limit(qstate->env->scratch_buffer),
+		0);
+}
 #endif /* USE_CACHEDB */
diff --git a/usr.sbin/unbound/cachedb/cachedb.h b/usr.sbin/unbound/cachedb/cachedb.h
index 05c4368e60b..2da8b5c71fe 100644
--- a/usr.sbin/unbound/cachedb/cachedb.h
+++ b/usr.sbin/unbound/cachedb/cachedb.h
@@ -41,6 +41,7 @@
  */
 #include "util/module.h"
 struct cachedb_backend;
+struct module_stack;
 
 /**
  * The global variable environment contents for the cachedb
@@ -110,3 +111,18 @@ size_t cachedb_get_mem(struct module_env* env, int id);
  */
 struct module_func_block* cachedb_get_funcblock(void);
 
+/**
+ * See if the cachedb is enabled.
+ * @param mods: module stack. It finds the cachedb module environment.
+ * @param env: module environment.
+ * @return true if exists and enabled.
+ */
+int cachedb_is_enabled(struct module_stack* mods, struct module_env* env);
+
+/**
+ * Remove a message from the global cache. Because edns subnet has a more
+ * specific entry, and if not removed when everything expires, the global
+ * entry is used, instead of a fresh lookup of the edns subnet entry.
+ * @param qstate: query state.
+ */
+void cachedb_msg_remove(struct module_qstate* qstate);
diff --git a/usr.sbin/unbound/config.h.in b/usr.sbin/unbound/config.h.in
index f31354d0140..bc39544c405 100644
--- a/usr.sbin/unbound/config.h.in
+++ b/usr.sbin/unbound/config.h.in
@@ -379,8 +379,8 @@
 /* Define to 1 if you have the `memmove' function. */
 #undef HAVE_MEMMOVE
 
-/* Define to 1 if you have the <memory.h> header file. */
-#undef HAVE_MEMORY_H
+/* Define to 1 if you have the <minix/config.h> header file. */
+#undef HAVE_MINIX_CONFIG_H
 
 /* Define to 1 if you have the <netdb.h> header file. */
 #undef HAVE_NETDB_H
@@ -587,6 +587,9 @@
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
 /* Define to 1 if you have the <stdlib.h> header file. */
 #undef HAVE_STDLIB_H
 
@@ -689,6 +692,9 @@
 /* Define to 1 if you have the <vfork.h> header file. */
 #undef HAVE_VFORK_H
 
+/* Define to 1 if you have the <wchar.h> header file. */
+#undef HAVE_WCHAR_H
+
 /* Define to 1 if you have the <windows.h> header file. */
 #undef HAVE_WINDOWS_H
 
@@ -830,7 +836,9 @@
 /* Define to 1 if libsodium supports sodium_set_misuse_handler */
 #undef SODIUM_MISUSE_HANDLER
 
-/* Define to 1 if you have the ANSI C header files. */
+/* Define to 1 if all of the C90 standard headers exist (not just the ones
+   required in a freestanding environment). This macro is provided for
+   backward compatibility; new code need not use it. */
 #undef STDC_HEADERS
 
 /* use default strptime. */
@@ -926,21 +934,87 @@
 #ifndef _ALL_SOURCE
 # undef _ALL_SOURCE
 #endif
+/* Enable general extensions on macOS.  */
+#ifndef _DARWIN_C_SOURCE
+# undef _DARWIN_C_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
 /* Enable GNU extensions on systems that have them.  */
 #ifndef _GNU_SOURCE
 # undef _GNU_SOURCE
 #endif
-/* Enable threading extensions on Solaris.  */
+/* Enable X/Open compliant socket functions that do not require linking
+   with -lxnet on HP-UX 11.11.  */
+#ifndef _HPUX_ALT_XOPEN_SOCKET_API
+# undef _HPUX_ALT_XOPEN_SOCKET_API
+#endif
+/* Identify the host operating system as Minix.
+   This macro does not affect the system headers' behavior.
+   A future release of Autoconf may stop defining this macro.  */
+#ifndef _MINIX
+# undef _MINIX
+#endif
+/* Enable general extensions on NetBSD.
+   Enable NetBSD compatibility extensions on Minix.  */
+#ifndef _NETBSD_SOURCE
+# undef _NETBSD_SOURCE
+#endif
+/* Enable OpenBSD compatibility extensions on NetBSD.
+   Oddly enough, this does nothing on OpenBSD.  */
+#ifndef _OPENBSD_SOURCE
+# undef _OPENBSD_SOURCE
+#endif
+/* Define to 1 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_SOURCE
+# undef _POSIX_SOURCE
+#endif
+/* Define to 2 if needed for POSIX-compatible behavior.  */
+#ifndef _POSIX_1_SOURCE
+# undef _POSIX_1_SOURCE
+#endif
+/* Enable POSIX-compatible threading on Solaris.  */
 #ifndef _POSIX_PTHREAD_SEMANTICS
 # undef _POSIX_PTHREAD_SEMANTICS
 #endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014.  */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-2:2015.  */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
+/* Enable extensions specified by ISO/IEC 24747:2009.  */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
 /* Enable extensions on HP NonStop.  */
 #ifndef _TANDEM_SOURCE
 # undef _TANDEM_SOURCE
 #endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
+/* Enable X/Open extensions.  Define to 500 only if necessary
+   to make mbstate_t available.  */
+#ifndef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
 #endif
 
 
@@ -966,11 +1040,6 @@
    `char[]'. */
 #undef YYTEXT_POINTER
 
-/* Enable large inode numbers on Mac OS X 10.5.  */
-#ifndef _DARWIN_USE_64_BIT_INODE
-# define _DARWIN_USE_64_BIT_INODE 1
-#endif
-
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 
@@ -980,19 +1049,9 @@
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
-/* Define to 1 if on MINIX. */
-#undef _MINIX
-
 /* Enable for compile on Minix */
 #undef _NETBSD_SOURCE
 
-/* Define to 2 if the system does not provide POSIX.1 features except with
-   this defined. */
-#undef _POSIX_1_SOURCE
-
-/* Define to 1 if you need to in order for `stat' and other things to work. */
-#undef _POSIX_SOURCE
-
 /* defined to use gcc ansi snprintf and sscanf that understands %lld when
    compiled for windows. */
 #undef __USE_MINGW_ANSI_STDIO
@@ -1033,7 +1092,7 @@
 /* Define to `long int' if <sys/types.h> does not define. */
 #undef off_t
 
-/* Define to `int' if <sys/types.h> does not define. */
+/* Define as a signed integer type capable of holding a process identifier. */
 #undef pid_t
 
 /* Define to 'int' if not defined */
diff --git a/usr.sbin/unbound/configure b/usr.sbin/unbound/configure
index db7fc818d4e..5ae6b7bf297 100644
--- a/usr.sbin/unbound/configure
+++ b/usr.sbin/unbound/configure
@@ -1,11 +1,12 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for unbound 1.19.3.
+# Generated by GNU Autoconf 2.71 for unbound 1.20.0.
 #
 # Report bugs to <unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues>.
 #
 #
-# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
+# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
+# Inc.
 #
 #
 # This configure script is free software; the Free Software Foundation
@@ -16,14 +17,16 @@
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else
+else $as_nop
   case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
@@ -33,46 +36,46 @@ esac
 fi
 
 
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
 as_nl='
 '
 export as_nl
-# Printing a long string crashes Solaris 7 /usr/bin/printf.
-as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
-as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
-as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
-# Prefer a ksh shell builtin over an external printf program on Solaris,
-# but without wasting forks for bash or zsh.
-if test -z "$BASH_VERSION$ZSH_VERSION" \
-    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
-  as_echo='print -r --'
-  as_echo_n='print -rn --'
-elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
-  as_echo='printf %s\n'
-  as_echo_n='printf %s'
-else
-  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
-    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
-    as_echo_n='/usr/ucb/echo -n'
-  else
-    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
-    as_echo_n_body='eval
-      arg=$1;
-      case $arg in #(
-      *"$as_nl"*)
-	expr "X$arg" : "X\\(.*\\)$as_nl";
-	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
-      esac;
-      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
-    '
-    export as_echo_n_body
-    as_echo_n='sh -c $as_echo_n_body as_echo'
-  fi
-  export as_echo_body
-  as_echo='sh -c $as_echo_body as_echo'
-fi
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
 
 # The user is always right.
-if test "${PATH_SEPARATOR+set}" != set; then
+if ${PATH_SEPARATOR+false} :; then
   PATH_SEPARATOR=:
   (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
     (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
@@ -81,13 +84,6 @@ if test "${PATH_SEPARATOR+set}" != set; then
 fi
 
 
-# IFS
-# We need space, tab and new line, in precisely that order.  Quoting is
-# there to prevent editors from complaining about space-tab.
-# (If _AS_PATH_WALK were called with IFS unset, it would disable word
-# splitting by setting IFS to empty value.)
-IFS=" ""	$as_nl"
-
 # Find who we are.  Look in the path if we contain no directory separator.
 as_myself=
 case $0 in #((
@@ -96,8 +92,12 @@ case $0 in #((
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
   done
 IFS=$as_save_IFS
 
@@ -109,30 +109,10 @@ if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
-  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
-# Unset variables that we do not need and which cause bugs (e.g. in
-# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
-# suppresses any "Segmentation fault" message there.  '((' could
-# trigger a bug in pdksh 5.2.14.
-for as_var in BASH_ENV ENV MAIL MAILPATH
-do eval test x\${$as_var+set} = xset \
-  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
-done
-PS1='$ '
-PS2='> '
-PS4='+ '
-
-# NLS nuisances.
-LC_ALL=C
-export LC_ALL
-LANGUAGE=C
-export LANGUAGE
-
-# CDPATH.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
 
 # Use a proper internal environment variable to ensure we don't fall
   # into an infinite loop, continuously re-executing ourselves.
@@ -154,20 +134,22 @@ esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed `exec'.
-$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
-as_fn_exit 255
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
+exit 255
   fi
   # We don't want this to propagate to other subprocesses.
           { _as_can_reexec=; unset _as_can_reexec;}
 if test "x$CONFIG_SHELL" = x; then
-  as_bourne_compatible="if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then :
+  as_bourne_compatible="as_nop=:
+if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on \${1+\"\$@\"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
-else
+else \$as_nop
   case \`(set -o) 2>/dev/null\` in #(
   *posix*) :
     set -o posix ;; #(
@@ -187,12 +169,15 @@ as_fn_success || { exitcode=1; echo as_fn_success failed.; }
 as_fn_failure && { exitcode=1; echo as_fn_failure succeeded.; }
 as_fn_ret_success || { exitcode=1; echo as_fn_ret_success failed.; }
 as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
-if ( set x; as_fn_ret_success y && test x = \"\$1\" ); then :
+if ( set x; as_fn_ret_success y && test x = \"\$1\" )
+then :
 
-else
+else \$as_nop
   exitcode=1; echo positional parameters were not saved.
 fi
 test x\$exitcode = x0 || exit 1
+blah=\$(echo \$(echo blah))
+test x\"\$blah\" = xblah || exit 1
 test -x / || exit 1"
   as_suggested="  as_lineno_1=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_1a=\$LINENO
   as_lineno_2=";as_suggested=$as_suggested$LINENO;as_suggested=$as_suggested" as_lineno_2a=\$LINENO
@@ -207,30 +192,38 @@ test \$(( 1 + 1 )) = 2 || exit 1
     PATH=/empty FPATH=/empty; export PATH FPATH
     test \"X\`printf %s \$ECHO\`\" = \"X\$ECHO\" \\
       || test \"X\`print -r -- \$ECHO\`\" = \"X\$ECHO\" ) || exit 1"
-  if (eval "$as_required") 2>/dev/null; then :
+  if (eval "$as_required") 2>/dev/null
+then :
   as_have_required=yes
-else
+else $as_nop
   as_have_required=no
 fi
-  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null; then :
+  if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
+then :
 
-else
+else $as_nop
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
   as_found=:
   case $as_dir in #(
 	 /*)
 	   for as_base in sh bash ksh sh5; do
 	     # Try only shells that exist, to save several forks.
-	     as_shell=$as_dir/$as_base
+	     as_shell=$as_dir$as_base
 	     if { test -f "$as_shell" || test -f "$as_shell.exe"; } &&
-		    { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$as_shell"; } 2>/dev/null; then :
+		    as_run=a "$as_shell" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
   CONFIG_SHELL=$as_shell as_have_required=yes
-		   if { $as_echo "$as_bourne_compatible""$as_suggested" | as_run=a "$as_shell"; } 2>/dev/null; then :
+		   if as_run=a "$as_shell" -c "$as_bourne_compatible""$as_suggested" 2>/dev/null
+then :
   break 2
 fi
 fi
@@ -238,14 +231,21 @@ fi
        esac
   as_found=false
 done
-$as_found || { if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
-	      { $as_echo "$as_bourne_compatible""$as_required" | as_run=a "$SHELL"; } 2>/dev/null; then :
-  CONFIG_SHELL=$SHELL as_have_required=yes
-fi; }
 IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
+then :
+  CONFIG_SHELL=$SHELL as_have_required=yes
+fi
+fi
 
 
-      if test "x$CONFIG_SHELL" != x; then :
+      if test "x$CONFIG_SHELL" != x
+then :
   export CONFIG_SHELL
              # We cannot yet assume a decent shell, so we have to provide a
 # neutralization value for shells without unset; and this also
@@ -263,18 +263,19 @@ esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
 # out after a failed `exec'.
-$as_echo "$0: could not re-execute with $CONFIG_SHELL" >&2
+printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
 
-    if test x$as_have_required = xno; then :
-  $as_echo "$0: This script requires a shell more modern than all"
-  $as_echo "$0: the shells that I found on your system."
-  if test x${ZSH_VERSION+set} = xset ; then
-    $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
-    $as_echo "$0: be upgraded to zsh 4.3.4 or later."
+    if test x$as_have_required = xno
+then :
+  printf "%s\n" "$0: This script requires a shell more modern than all"
+  printf "%s\n" "$0: the shells that I found on your system."
+  if test ${ZSH_VERSION+y} ; then
+    printf "%s\n" "$0: In particular, zsh $ZSH_VERSION has bugs and should"
+    printf "%s\n" "$0: be upgraded to zsh 4.3.4 or later."
   else
-    $as_echo "$0: Please tell bug-autoconf@gnu.org and
+    printf "%s\n" "$0: Please tell bug-autoconf@gnu.org and
 $0: unbound-bugs@nlnetlabs.nl or
 $0: https://github.com/NLnetLabs/unbound/issues about your
 $0: system, including any error possibly output before this
@@ -303,6 +304,7 @@ as_fn_unset ()
 }
 as_unset=as_fn_unset
 
+
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -320,6 +322,14 @@ as_fn_exit ()
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
 
 # as_fn_mkdir_p
 # -------------
@@ -334,7 +344,7 @@ as_fn_mkdir_p ()
     as_dirs=
     while :; do
       case $as_dir in #(
-      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
@@ -343,7 +353,7 @@ $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$as_dir" |
+printf "%s\n" X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -382,12 +392,13 @@ as_fn_executable_p ()
 # advantage of any shell optimizations that allow amortized linear growth over
 # repeated appends, instead of the typical quadratic growth present in naive
 # implementations.
-if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
   eval 'as_fn_append ()
   {
     eval $1+=\$2
   }'
-else
+else $as_nop
   as_fn_append ()
   {
     eval $1=\$$1\$2
@@ -399,18 +410,27 @@ fi # as_fn_append
 # Perform arithmetic evaluation on the ARGs, and store the result in the
 # global $as_val. Take advantage of shells that can avoid forks. The arguments
 # must be portable across $(()) and expr.
-if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
   eval 'as_fn_arith ()
   {
     as_val=$(( $* ))
   }'
-else
+else $as_nop
   as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
   }
 fi # as_fn_arith
 
+# as_fn_nop
+# ---------
+# Do nothing but, unlike ":", preserve the value of $?.
+as_fn_nop ()
+{
+  return $?
+}
+as_nop=as_fn_nop
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
@@ -422,9 +442,9 @@ as_fn_error ()
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
-  $as_echo "$as_me: error: $2" >&2
+  printf "%s\n" "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
@@ -451,7 +471,7 @@ as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X/"$0" |
+printf "%s\n" X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
@@ -495,7 +515,7 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
       s/-\n.*//
     ' >$as_me.lineno &&
   chmod +x "$as_me.lineno" ||
-    { $as_echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
+    { printf "%s\n" "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2; as_fn_exit 1; }
 
   # If we had to re-execute with $CONFIG_SHELL, we're ensured to have
   # already done that, so ensure we don't try to do so again and fall
@@ -509,6 +529,10 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
   exit
 }
 
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
 ECHO_C= ECHO_N= ECHO_T=
 case `echo -n x` in #(((((
 -n*)
@@ -522,6 +546,13 @@ case `echo -n x` in #(((((
   ECHO_N='-n';;
 esac
 
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
+
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -591,47 +622,44 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='unbound'
 PACKAGE_TARNAME='unbound'
-PACKAGE_VERSION='1.19.3'
-PACKAGE_STRING='unbound 1.19.3'
+PACKAGE_VERSION='1.20.0'
+PACKAGE_STRING='unbound 1.20.0'
 PACKAGE_BUGREPORT='unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues'
 PACKAGE_URL=''
 
 # Factoring default headers for most tests.
 ac_includes_default="\
-#include <stdio.h>
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-# include <sys/stat.h>
+#include <stddef.h>
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
 #endif
-#ifdef STDC_HEADERS
+#ifdef HAVE_STDLIB_H
 # include <stdlib.h>
-# include <stddef.h>
-#else
-# ifdef HAVE_STDLIB_H
-#  include <stdlib.h>
-# endif
 #endif
 #ifdef HAVE_STRING_H
-# if !defined STDC_HEADERS && defined HAVE_MEMORY_H
-#  include <memory.h>
-# endif
 # include <string.h>
 #endif
-#ifdef HAVE_STRINGS_H
-# include <strings.h>
-#endif
 #ifdef HAVE_INTTYPES_H
 # include <inttypes.h>
 #endif
 #ifdef HAVE_STDINT_H
 # include <stdint.h>
 #endif
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif"
 
+ac_header_c_list=
+ac_func_c_list=
 ac_subst_vars='LTLIBOBJS
 date
 version
@@ -714,6 +742,7 @@ WITH_DYNLIBMODULE
 PTHREAD_CFLAGS_ONLY
 PTHREAD_CFLAGS
 PTHREAD_LIBS
+PTHREAD_CXX
 PTHREAD_CC
 ax_pthread_config
 ASYNCLOOK_ALLOCCHECK_EXTRA_OBJ
@@ -726,6 +755,7 @@ SYSTEMD_LIBS
 SYSTEMD_CFLAGS
 RUNTIME_PATH
 LIBOBJS
+CPP
 PKG_CONFIG_LIBDIR
 PKG_CONFIG_PATH
 PKG_CONFIG
@@ -747,6 +777,7 @@ ac_ct_DUMPBIN
 DUMPBIN
 LD
 FGREP
+EGREP
 SED
 LIBTOOL
 AR
@@ -768,6 +799,7 @@ LEX_OUTPUT_ROOT
 LEX
 debug_enabled
 DEPFLAG
+GREP
 UNBOUND_USERNAME
 UNBOUND_ROOTCERT_FILE
 UNBOUND_ROOTKEY_FILE
@@ -780,9 +812,6 @@ ub_conf_file
 UNBOUND_LOCALSTATE_DIR
 UNBOUND_SYSCONF_DIR
 UNBOUND_SBIN_DIR
-EGREP
-GREP
-CPP
 OBJEXT
 EXEEXT
 ac_ct_CC
@@ -917,13 +946,13 @@ CFLAGS
 LDFLAGS
 LIBS
 CPPFLAGS
-CPP
 YACC
 YFLAGS
 LT_SYS_LIBRARY_PATH
 PKG_CONFIG
 PKG_CONFIG_PATH
 PKG_CONFIG_LIBDIR
+CPP
 SYSTEMD_CFLAGS
 SYSTEMD_LIBS
 SYSTEMD_DAEMON_CFLAGS
@@ -999,8 +1028,6 @@ do
   *)    ac_optarg=yes ;;
   esac
 
-  # Accept the important Cygnus configure options, so we can diagnose typos.
-
   case $ac_dashdash$ac_option in
   --)
     ac_dashdash=yes ;;
@@ -1041,9 +1068,9 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: $ac_useropt"
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
@@ -1067,9 +1094,9 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: $ac_useropt"
+      as_fn_error $? "invalid feature name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "enable_$ac_useropt"
@@ -1280,9 +1307,9 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: $ac_useropt"
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
@@ -1296,9 +1323,9 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: $ac_useropt"
+      as_fn_error $? "invalid package name: \`$ac_useropt'"
     ac_useropt_orig=$ac_useropt
-    ac_useropt=`$as_echo "$ac_useropt" | sed 's/[-+.]/_/g'`
+    ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
       *"
 "with_$ac_useropt"
@@ -1342,9 +1369,9 @@ Try \`$0 --help' for more information"
 
   *)
     # FIXME: should be removed in autoconf 3.0.
-    $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+    printf "%s\n" "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
-      $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
+      printf "%s\n" "$as_me: WARNING: invalid host type: $ac_option" >&2
     : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
     ;;
 
@@ -1360,7 +1387,7 @@ if test -n "$ac_unrecognized_opts"; then
   case $enable_option_checking in
     no) ;;
     fatal) as_fn_error $? "unrecognized options: $ac_unrecognized_opts" ;;
-    *)     $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
+    *)     printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2 ;;
   esac
 fi
 
@@ -1424,7 +1451,7 @@ $as_expr X"$as_myself" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_myself" : 'X\(//\)[^/]' \| \
 	 X"$as_myself" : 'X\(//\)$' \| \
 	 X"$as_myself" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$as_myself" |
+printf "%s\n" X"$as_myself" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -1481,7 +1508,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures unbound 1.19.3 to adapt to many kinds of systems.
+\`configure' configures unbound 1.20.0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1547,7 +1574,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of unbound 1.19.3:";;
+     short | recursive ) echo "Configuration of unbound 1.20.0:";;
    esac
   cat <<\_ACEOF
 
@@ -1696,7 +1723,6 @@ Some influential environment variables:
   LIBS        libraries to pass to the linker, e.g. -l<library>
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
-  CPP         C preprocessor
   YACC        The `Yet Another Compiler Compiler' implementation to use.
               Defaults to the first program found out of: `bison -y', `byacc',
               `yacc'.
@@ -1710,6 +1736,7 @@ Some influential environment variables:
               directories to add to pkg-config's search path
   PKG_CONFIG_LIBDIR
               path overriding pkg-config's built-in search path
+  CPP         C preprocessor
   SYSTEMD_CFLAGS
               C compiler flags for SYSTEMD, overriding pkg-config
   SYSTEMD_LIBS
@@ -1746,9 +1773,9 @@ if test "$ac_init_help" = "recursive"; then
 case "$ac_dir" in
 .) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
 *)
-  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
-  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
@@ -1776,7 +1803,8 @@ esac
 ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
 
     cd "$ac_dir" || { ac_status=$?; continue; }
-    # Check for guested configure.
+    # Check for configure.gnu first; this name is used for a wrapper for
+    # Metaconfig's "Configure" on case-insensitive file systems.
     if test -f "$ac_srcdir/configure.gnu"; then
       echo &&
       $SHELL "$ac_srcdir/configure.gnu" --help=recursive
@@ -1784,7 +1812,7 @@ ac_abs_srcdir=$ac_abs_top_srcdir$ac_dir_suffix
       echo &&
       $SHELL "$ac_srcdir/configure" --help=recursive
     else
-      $as_echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+      printf "%s\n" "$as_me: WARNING: no configuration information is in $ac_dir" >&2
     fi || ac_status=$?
     cd "$ac_pwd" || { ac_status=$?; break; }
   done
@@ -1793,10 +1821,10 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-unbound configure 1.19.3
-generated by GNU Autoconf 2.69
+unbound configure 1.20.0
+generated by GNU Autoconf 2.71
 
-Copyright (C) 2012 Free Software Foundation, Inc.
+Copyright (C) 2021 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
@@ -1813,14 +1841,14 @@ fi
 ac_fn_c_try_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  rm -f conftest.$ac_objext
+  rm -f conftest.$ac_objext conftest.beam
   if { { ac_try="$ac_compile"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -1828,14 +1856,15 @@ $as_echo "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then :
+       } && test -s conftest.$ac_objext
+then :
   ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
@@ -1845,176 +1874,6 @@ fi
 
 } # ac_fn_c_try_compile
 
-# ac_fn_c_try_cpp LINENO
-# ----------------------
-# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_cpp ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_cpp conftest.$ac_ext"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } > conftest.i && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-    ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_cpp
-
-# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
-# -------------------------------------------------------
-# Tests whether HEADER exists, giving a warning if it cannot be compiled using
-# the include files in INCLUDES and setting the cache variable VAR
-# accordingly.
-ac_fn_c_check_header_mongrel ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if eval \${$3+:} false; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-else
-  # Is the header compilable?
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
-$as_echo_n "checking $2 usability... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-#include <$2>
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_header_compiler=yes
-else
-  ac_header_compiler=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
-$as_echo "$ac_header_compiler" >&6; }
-
-# Is the header present?
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
-$as_echo_n "checking $2 presence... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <$2>
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  ac_header_preproc=yes
-else
-  ac_header_preproc=no
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
-$as_echo "$ac_header_preproc" >&6; }
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
-  yes:no: )
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
-$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
-    ;;
-  no:yes:* )
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
-$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
-$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
-$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
-$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
-$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
-( $as_echo "## --------------------------------------------------------------------------------------- ##
-## Report this to unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues ##
-## --------------------------------------------------------------------------------------- ##"
-     ) | sed "s/^/$as_me: WARNING:     /" >&2
-    ;;
-esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  eval "$3=\$ac_header_compiler"
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_header_mongrel
-
-# ac_fn_c_try_run LINENO
-# ----------------------
-# Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
-# that executables *can* be run.
-ac_fn_c_try_run ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if { { ac_try="$ac_link"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_link") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
-  { { case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; }; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: program exited with status $ac_status" >&5
-       $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-       ac_retval=$ac_status
-fi
-  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_run
-
 # ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
 # -------------------------------------------------------
 # Tests whether HEADER exists and can be compiled using the include files in
@@ -2022,26 +1881,28 @@ fi
 ac_fn_c_check_header_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   eval "$3=yes"
-else
+else $as_nop
   eval "$3=no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_compile
@@ -2052,14 +1913,14 @@ $as_echo "$ac_res" >&6; }
 ac_fn_c_try_link ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  rm -f conftest.$ac_objext conftest$ac_exeext
+  rm -f conftest.$ac_objext conftest.beam conftest$ac_exeext
   if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -2067,17 +1928,18 @@ $as_echo "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
     mv -f conftest.er1 conftest.err
   fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
 	 test -z "$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext && {
 	 test "$cross_compiling" = yes ||
 	 test -x conftest$ac_exeext
-       }; then :
+       }
+then :
   ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
@@ -2098,11 +1960,12 @@ fi
 ac_fn_c_check_func ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 /* Define $2 to an innocuous variant, in case <limits.h> declares $2.
@@ -2110,16 +1973,9 @@ else
 #define $2 innocuous_$2
 
 /* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $2 (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
+   which can conflict with char $2 (); below.  */
 
+#include <limits.h>
 #undef $2
 
 /* Override any GCC internal prototype to avoid an error.
@@ -2137,24 +1993,25 @@ choke me
 #endif
 
 int
-main ()
+main (void)
 {
 return $2 ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   eval "$3=yes"
-else
+else $as_nop
   eval "$3=no"
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 fi
 eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_func
@@ -2166,17 +2023,18 @@ $as_echo "$ac_res" >&6; }
 ac_fn_c_check_type ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+printf %s "checking for $2... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   eval "$3=no"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 if (sizeof ($2))
 	 return 0;
@@ -2184,12 +2042,13 @@ if (sizeof ($2))
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 if (sizeof (($2)))
 	    return 0;
@@ -2197,22 +2056,104 @@ if (sizeof (($2)))
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
 
-else
+else $as_nop
   eval "$3=yes"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_type
 
+# ac_fn_c_try_cpp LINENO
+# ----------------------
+# Try to preprocess conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_cpp ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_cpp conftest.$ac_ext"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_cpp conftest.$ac_ext") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } > conftest.i && {
+	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+    ac_retval=1
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_cpp
+
+# ac_fn_c_try_run LINENO
+# ----------------------
+# Try to run conftest.$ac_ext, and return whether this succeeded. Assumes that
+# executables *can* be run.
+ac_fn_c_try_run ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && { ac_try='./conftest$ac_exeext'
+  { { case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+then :
+  ac_retval=0
+else $as_nop
+  printf "%s\n" "$as_me: program exited with status $ac_status" >&5
+       printf "%s\n" "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+       ac_retval=$ac_status
+fi
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_run
+
 # ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
 # --------------------------------------------
 # Tries to find the compile-time value of EXPR in a program that includes
@@ -2227,7 +2168,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 static int test_array [1 - 2 * !(($2) >= 0)];
 test_array [0] = 0;
@@ -2237,14 +2178,15 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_lo=0 ac_mid=0
   while :; do
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 static int test_array [1 - 2 * !(($2) <= $ac_mid)];
 test_array [0] = 0;
@@ -2254,9 +2196,10 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_hi=$ac_mid; break
-else
+else $as_nop
   as_fn_arith $ac_mid + 1 && ac_lo=$as_val
 			if test $ac_lo -le $ac_mid; then
 			  ac_lo= ac_hi=
@@ -2264,14 +2207,14 @@ else
 			fi
 			as_fn_arith 2 '*' $ac_mid + 1 && ac_mid=$as_val
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   done
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 static int test_array [1 - 2 * !(($2) < 0)];
 test_array [0] = 0;
@@ -2281,14 +2224,15 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_hi=-1 ac_mid=-1
   while :; do
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 static int test_array [1 - 2 * !(($2) >= $ac_mid)];
 test_array [0] = 0;
@@ -2298,9 +2242,10 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_lo=$ac_mid; break
-else
+else $as_nop
   as_fn_arith '(' $ac_mid ')' - 1 && ac_hi=$as_val
 			if test $ac_mid -le $ac_hi; then
 			  ac_lo= ac_hi=
@@ -2308,14 +2253,14 @@ else
 			fi
 			as_fn_arith 2 '*' $ac_mid && ac_mid=$as_val
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   done
-else
+else $as_nop
   ac_lo= ac_hi=
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 # Binary search between lo and hi bounds.
 while test "x$ac_lo" != "x$ac_hi"; do
   as_fn_arith '(' $ac_hi - $ac_lo ')' / 2 + $ac_lo && ac_mid=$as_val
@@ -2323,7 +2268,7 @@ while test "x$ac_lo" != "x$ac_hi"; do
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 static int test_array [1 - 2 * !(($2) <= $ac_mid)];
 test_array [0] = 0;
@@ -2333,12 +2278,13 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_hi=$ac_mid
-else
+else $as_nop
   as_fn_arith '(' $ac_mid ')' + 1 && ac_lo=$as_val
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 done
 case $ac_lo in #((
 ?*) eval "$3=\$ac_lo"; ac_retval=0 ;;
@@ -2348,12 +2294,12 @@ esac
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
-static long int longval () { return $2; }
-static unsigned long int ulongval () { return $2; }
+static long int longval (void) { return $2; }
+static unsigned long int ulongval (void) { return $2; }
 #include <stdio.h>
 #include <stdlib.h>
 int
-main ()
+main (void)
 {
 
   FILE *f = fopen ("conftest.val", "w");
@@ -2381,9 +2327,10 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   echo >>conftest.val; read $3 <conftest.val; ac_retval=0
-else
+else $as_nop
   ac_retval=1
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -2396,25 +2343,28 @@ rm -f conftest.val
 
 } # ac_fn_c_compute_int
 
-# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
-# ---------------------------------------------
+# ac_fn_check_decl LINENO SYMBOL VAR INCLUDES EXTRA-OPTIONS FLAG-VAR
+# ------------------------------------------------------------------
 # Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
-# accordingly.
-ac_fn_c_check_decl ()
+# accordingly. Pass EXTRA-OPTIONS to the compiler, using FLAG-VAR.
+ac_fn_check_decl ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   as_decl_name=`echo $2|sed 's/ *(.*//'`
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
+printf %s "checking whether $as_decl_name is declared... " >&6; }
+if eval test \${$3+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
-$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  eval ac_save_FLAGS=\$$6
+  as_fn_append $6 " $5"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 int
-main ()
+main (void)
 {
 #ifndef $as_decl_name
 #ifdef __cplusplus
@@ -2428,19 +2378,22 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   eval "$3=yes"
-else
+else $as_nop
   eval "$3=no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+  eval $6=\$ac_save_FLAGS
+
 fi
 eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_decl
+} # ac_fn_check_decl
 
 # ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
 # ----------------------------------------------------
@@ -2449,16 +2402,17 @@ $as_echo "$ac_res" >&6; }
 ac_fn_c_check_member ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
-$as_echo_n "checking for $2.$3... " >&6; }
-if eval \${$4+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
+printf %s "checking for $2.$3... " >&6; }
+if eval test \${$4+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $5
 int
-main ()
+main (void)
 {
 static $2 ac_aggr;
 if (ac_aggr.$3)
@@ -2467,14 +2421,15 @@ return 0;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   eval "$4=yes"
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $5
 int
-main ()
+main (void)
 {
 static $2 ac_aggr;
 if (sizeof ac_aggr.$3)
@@ -2483,29 +2438,50 @@ return 0;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   eval "$4=yes"
-else
+else $as_nop
   eval "$4=no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 eval ac_res=\$$4
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_member
+ac_configure_args_raw=
+for ac_arg
+do
+  case $ac_arg in
+  *\'*)
+    ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+  esac
+  as_fn_append ac_configure_args_raw " '$ac_arg'"
+done
+
+case $ac_configure_args_raw in
+  *$as_nl*)
+    ac_safe_unquote= ;;
+  *)
+    ac_unsafe_z='|&;<>()$`\\"*?[ ''	' # This string ends in space, tab.
+    ac_unsafe_a="$ac_unsafe_z#~"
+    ac_safe_unquote="s/ '\\([^$ac_unsafe_a][^$ac_unsafe_z]*\\)'/ \\1/g"
+    ac_configure_args_raw=`      printf "%s\n" "$ac_configure_args_raw" | sed "$ac_safe_unquote"`;;
+esac
+
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by unbound $as_me 1.19.3, which was
-generated by GNU Autoconf 2.69.  Invocation command line was
+It was created by unbound $as_me 1.20.0, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
 
-  $ $0 $@
+  $ $0$ac_configure_args_raw
 
 _ACEOF
 exec 5>>config.log
@@ -2538,8 +2514,12 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    $as_echo "PATH: $as_dir"
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    printf "%s\n" "PATH: $as_dir"
   done
 IFS=$as_save_IFS
 
@@ -2574,7 +2554,7 @@ do
     | -silent | --silent | --silen | --sile | --sil)
       continue ;;
     *\'*)
-      ac_arg=`$as_echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+      ac_arg=`printf "%s\n" "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     case $ac_pass in
     1) as_fn_append ac_configure_args0 " '$ac_arg'" ;;
@@ -2609,11 +2589,13 @@ done
 # WARNING: Use '\'' to represent an apostrophe within the trap.
 # WARNING: Do not start the trap code with a newline, due to a FreeBSD 4.0 bug.
 trap 'exit_status=$?
+  # Sanitize IFS.
+  IFS=" ""	$as_nl"
   # Save into config.log some information that might help in debugging.
   {
     echo
 
-    $as_echo "## ---------------- ##
+    printf "%s\n" "## ---------------- ##
 ## Cache variables. ##
 ## ---------------- ##"
     echo
@@ -2624,8 +2606,8 @@ trap 'exit_status=$?
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
-      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
-$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
@@ -2649,7 +2631,7 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
 )
     echo
 
-    $as_echo "## ----------------- ##
+    printf "%s\n" "## ----------------- ##
 ## Output variables. ##
 ## ----------------- ##"
     echo
@@ -2657,14 +2639,14 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
     do
       eval ac_val=\$$ac_var
       case $ac_val in
-      *\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+      *\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
       esac
-      $as_echo "$ac_var='\''$ac_val'\''"
+      printf "%s\n" "$ac_var='\''$ac_val'\''"
     done | sort
     echo
 
     if test -n "$ac_subst_files"; then
-      $as_echo "## ------------------- ##
+      printf "%s\n" "## ------------------- ##
 ## File substitutions. ##
 ## ------------------- ##"
       echo
@@ -2672,15 +2654,15 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       do
 	eval ac_val=\$$ac_var
 	case $ac_val in
-	*\'\''*) ac_val=`$as_echo "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
+	*\'\''*) ac_val=`printf "%s\n" "$ac_val" | sed "s/'\''/'\''\\\\\\\\'\'''\''/g"`;;
 	esac
-	$as_echo "$ac_var='\''$ac_val'\''"
+	printf "%s\n" "$ac_var='\''$ac_val'\''"
       done | sort
       echo
     fi
 
     if test -s confdefs.h; then
-      $as_echo "## ----------- ##
+      printf "%s\n" "## ----------- ##
 ## confdefs.h. ##
 ## ----------- ##"
       echo
@@ -2688,8 +2670,8 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       echo
     fi
     test "$ac_signal" != 0 &&
-      $as_echo "$as_me: caught signal $ac_signal"
-    $as_echo "$as_me: exit $exit_status"
+      printf "%s\n" "$as_me: caught signal $ac_signal"
+    printf "%s\n" "$as_me: exit $exit_status"
   } >&5
   rm -f core *.core core.conftest.* &&
     rm -f -r conftest* confdefs* conf$$* $ac_clean_files &&
@@ -2703,63 +2685,48 @@ ac_signal=0
 # confdefs.h avoids OS command line length limits that DEFS can exceed.
 rm -f -r conftest* confdefs.h
 
-$as_echo "/* confdefs.h */" > confdefs.h
+printf "%s\n" "/* confdefs.h */" > confdefs.h
 
 # Predefined preprocessor variables.
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_NAME "$PACKAGE_NAME"
-_ACEOF
+printf "%s\n" "#define PACKAGE_NAME \"$PACKAGE_NAME\"" >>confdefs.h
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
-_ACEOF
+printf "%s\n" "#define PACKAGE_TARNAME \"$PACKAGE_TARNAME\"" >>confdefs.h
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_VERSION "$PACKAGE_VERSION"
-_ACEOF
+printf "%s\n" "#define PACKAGE_VERSION \"$PACKAGE_VERSION\"" >>confdefs.h
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_STRING "$PACKAGE_STRING"
-_ACEOF
+printf "%s\n" "#define PACKAGE_STRING \"$PACKAGE_STRING\"" >>confdefs.h
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
-_ACEOF
+printf "%s\n" "#define PACKAGE_BUGREPORT \"$PACKAGE_BUGREPORT\"" >>confdefs.h
 
-cat >>confdefs.h <<_ACEOF
-#define PACKAGE_URL "$PACKAGE_URL"
-_ACEOF
+printf "%s\n" "#define PACKAGE_URL \"$PACKAGE_URL\"" >>confdefs.h
 
 
 # Let the site file select an alternate cache file if it wants to.
 # Prefer an explicitly selected file to automatically selected ones.
-ac_site_file1=NONE
-ac_site_file2=NONE
 if test -n "$CONFIG_SITE"; then
-  # We do not want a PATH search for config.site.
-  case $CONFIG_SITE in #((
-    -*)  ac_site_file1=./$CONFIG_SITE;;
-    */*) ac_site_file1=$CONFIG_SITE;;
-    *)   ac_site_file1=./$CONFIG_SITE;;
-  esac
+  ac_site_files="$CONFIG_SITE"
 elif test "x$prefix" != xNONE; then
-  ac_site_file1=$prefix/share/config.site
-  ac_site_file2=$prefix/etc/config.site
+  ac_site_files="$prefix/share/config.site $prefix/etc/config.site"
 else
-  ac_site_file1=$ac_default_prefix/share/config.site
-  ac_site_file2=$ac_default_prefix/etc/config.site
+  ac_site_files="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
 fi
-for ac_site_file in "$ac_site_file1" "$ac_site_file2"
+
+for ac_site_file in $ac_site_files
 do
-  test "x$ac_site_file" = xNONE && continue
-  if test /dev/null != "$ac_site_file" && test -r "$ac_site_file"; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
-$as_echo "$as_me: loading site script $ac_site_file" >&6;}
+  case $ac_site_file in #(
+  */*) :
+     ;; #(
+  *) :
+    ac_site_file=./$ac_site_file ;;
+esac
+  if test -f "$ac_site_file" && test -r "$ac_site_file"; then
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading site script $ac_site_file" >&5
+printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
-      || { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
 See \`config.log' for more details" "$LINENO" 5; }
   fi
@@ -2769,19 +2736,439 @@ if test -r "$cache_file"; then
   # Some versions of bash will fail to source /dev/null (special files
   # actually), so we avoid doing that.  DJGPP emulates it as a regular file.
   if test /dev/null != "$cache_file" && test -f "$cache_file"; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
-$as_echo "$as_me: loading cache $cache_file" >&6;}
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: loading cache $cache_file" >&5
+printf "%s\n" "$as_me: loading cache $cache_file" >&6;}
     case $cache_file in
       [\\/]* | ?:[\\/]* ) . "$cache_file";;
       *)                      . "./$cache_file";;
     esac
   fi
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
-$as_echo "$as_me: creating cache $cache_file" >&6;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating cache $cache_file" >&5
+printf "%s\n" "$as_me: creating cache $cache_file" >&6;}
   >$cache_file
 fi
 
+as_fn_append ac_header_c_list " stdio.h stdio_h HAVE_STDIO_H"
+# Test code for whether the C compiler supports C89 (global declarations)
+ac_c_conftest_c89_globals='
+/* Does the compiler advertise C89 conformance?
+   Do not test the value of __STDC__, because some compilers set it to 0
+   while being otherwise adequately conformant. */
+#if !defined __STDC__
+# error "Compiler does not advertise C89 conformance"
+#endif
+
+#include <stddef.h>
+#include <stdarg.h>
+struct stat;
+/* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
+struct buf { int x; };
+struct buf * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not \xHH hex character constants.
+   These do not provoke an error unfortunately, instead are silently treated
+   as an "x".  The following induces an error, until -std is added to get
+   proper ANSI mode.  Curiously \x00 != x always comes out true, for an
+   array size at least.  It is necessary to write \x00 == 0 to get something
+   that is true only with -std.  */
+int osf4_cc_array ['\''\x00'\'' == 0 ? 1 : -1];
+
+/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
+   inside strings and character constants.  */
+#define FOO(x) '\''x'\''
+int xlc6_cc_array[FOO(a) == '\''x'\'' ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, int *(*)(struct buf *, struct stat *, int),
+               int, int);'
+
+# Test code for whether the C compiler supports C89 (body of main).
+ac_c_conftest_c89_main='
+ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
+'
+
+# Test code for whether the C compiler supports C99 (global declarations)
+ac_c_conftest_c99_globals='
+// Does the compiler advertise C99 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
+# error "Compiler does not advertise C99 conformance"
+#endif
+
+#include <stdbool.h>
+extern int puts (const char *);
+extern int printf (const char *, ...);
+extern int dprintf (int, const char *, ...);
+extern void *malloc (size_t);
+
+// Check varargs macros.  These examples are taken from C99 6.10.3.5.
+// dprintf is used instead of fprintf to avoid needing to declare
+// FILE and stderr.
+#define debug(...) dprintf (2, __VA_ARGS__)
+#define showlist(...) puts (#__VA_ARGS__)
+#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
+static void
+test_varargs_macros (void)
+{
+  int x = 1234;
+  int y = 5678;
+  debug ("Flag");
+  debug ("X = %d\n", x);
+  showlist (The first, second, and third items.);
+  report (x>y, "x is %d but y is %d", x, y);
+}
+
+// Check long long types.
+#define BIG64 18446744073709551615ull
+#define BIG32 4294967295ul
+#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
+#if !BIG_OK
+  #error "your preprocessor is broken"
+#endif
+#if BIG_OK
+#else
+  #error "your preprocessor is broken"
+#endif
+static long long int bignum = -9223372036854775807LL;
+static unsigned long long int ubignum = BIG64;
+
+struct incomplete_array
+{
+  int datasize;
+  double data[];
+};
+
+struct named_init {
+  int number;
+  const wchar_t *name;
+  double average;
+};
+
+typedef const char *ccp;
+
+static inline int
+test_restrict (ccp restrict text)
+{
+  // See if C++-style comments work.
+  // Iterate through items via the restricted pointer.
+  // Also check for declarations in for loops.
+  for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
+    continue;
+  return 0;
+}
+
+// Check varargs and va_copy.
+static bool
+test_varargs (const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  va_list args_copy;
+  va_copy (args_copy, args);
+
+  const char *str = "";
+  int number = 0;
+  float fnumber = 0;
+
+  while (*format)
+    {
+      switch (*format++)
+	{
+	case '\''s'\'': // string
+	  str = va_arg (args_copy, const char *);
+	  break;
+	case '\''d'\'': // int
+	  number = va_arg (args_copy, int);
+	  break;
+	case '\''f'\'': // float
+	  fnumber = va_arg (args_copy, double);
+	  break;
+	default:
+	  break;
+	}
+    }
+  va_end (args_copy);
+  va_end (args);
+
+  return *str && number && fnumber;
+}
+'
+
+# Test code for whether the C compiler supports C99 (body of main).
+ac_c_conftest_c99_main='
+  // Check bool.
+  _Bool success = false;
+  success |= (argc != 0);
+
+  // Check restrict.
+  if (test_restrict ("String literal") == 0)
+    success = true;
+  char *restrict newvar = "Another string";
+
+  // Check varargs.
+  success &= test_varargs ("s, d'\'' f .", "string", 65, 34.234);
+  test_varargs_macros ();
+
+  // Check flexible array members.
+  struct incomplete_array *ia =
+    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
+  ia->datasize = 10;
+  for (int i = 0; i < ia->datasize; ++i)
+    ia->data[i] = i * 1.234;
+
+  // Check named initializers.
+  struct named_init ni = {
+    .number = 34,
+    .name = L"Test wide string",
+    .average = 543.34343,
+  };
+
+  ni.number = 58;
+
+  int dynamic_array[ni.number];
+  dynamic_array[0] = argv[0][0];
+  dynamic_array[ni.number - 1] = 543;
+
+  // work around unused variable warnings
+  ok |= (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == '\''x'\''
+	 || dynamic_array[ni.number - 1] != 543);
+'
+
+# Test code for whether the C compiler supports C11 (global declarations)
+ac_c_conftest_c11_globals='
+// Does the compiler advertise C11 conformance?
+#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
+# error "Compiler does not advertise C11 conformance"
+#endif
+
+// Check _Alignas.
+char _Alignas (double) aligned_as_double;
+char _Alignas (0) no_special_alignment;
+extern char aligned_as_int;
+char _Alignas (0) _Alignas (int) aligned_as_int;
+
+// Check _Alignof.
+enum
+{
+  int_alignment = _Alignof (int),
+  int_array_alignment = _Alignof (int[100]),
+  char_alignment = _Alignof (char)
+};
+_Static_assert (0 < -_Alignof (int), "_Alignof is signed");
+
+// Check _Noreturn.
+int _Noreturn does_not_return (void) { for (;;) continue; }
+
+// Check _Static_assert.
+struct test_static_assert
+{
+  int x;
+  _Static_assert (sizeof (int) <= sizeof (long int),
+                  "_Static_assert does not work in struct");
+  long int y;
+};
+
+// Check UTF-8 literals.
+#define u8 syntax error!
+char const utf8_literal[] = u8"happens to be ASCII" "another string";
+
+// Check duplicate typedefs.
+typedef long *long_ptr;
+typedef long int *long_ptr;
+typedef long_ptr long_ptr;
+
+// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
+struct anonymous
+{
+  union {
+    struct { int i; int j; };
+    struct { int k; long int l; } w;
+  };
+  int m;
+} v1;
+'
+
+# Test code for whether the C compiler supports C11 (body of main).
+ac_c_conftest_c11_main='
+  _Static_assert ((offsetof (struct anonymous, i)
+		   == offsetof (struct anonymous, w.k)),
+		  "Anonymous union alignment botch");
+  v1.i = 2;
+  v1.w.k = 5;
+  ok |= v1.i != 5;
+'
+
+# Test code for whether the C compiler supports C11 (complete).
+ac_c_conftest_c11_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+${ac_c_conftest_c11_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  ${ac_c_conftest_c11_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C99 (complete).
+ac_c_conftest_c99_program="${ac_c_conftest_c89_globals}
+${ac_c_conftest_c99_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  ${ac_c_conftest_c99_main}
+  return ok;
+}
+"
+
+# Test code for whether the C compiler supports C89 (complete).
+ac_c_conftest_c89_program="${ac_c_conftest_c89_globals}
+
+int
+main (int argc, char **argv)
+{
+  int ok = 0;
+  ${ac_c_conftest_c89_main}
+  return ok;
+}
+"
+
+as_fn_append ac_header_c_list " stdlib.h stdlib_h HAVE_STDLIB_H"
+as_fn_append ac_header_c_list " string.h string_h HAVE_STRING_H"
+as_fn_append ac_header_c_list " inttypes.h inttypes_h HAVE_INTTYPES_H"
+as_fn_append ac_header_c_list " stdint.h stdint_h HAVE_STDINT_H"
+as_fn_append ac_header_c_list " strings.h strings_h HAVE_STRINGS_H"
+as_fn_append ac_header_c_list " sys/stat.h sys_stat_h HAVE_SYS_STAT_H"
+as_fn_append ac_header_c_list " sys/types.h sys_types_h HAVE_SYS_TYPES_H"
+as_fn_append ac_header_c_list " unistd.h unistd_h HAVE_UNISTD_H"
+as_fn_append ac_header_c_list " wchar.h wchar_h HAVE_WCHAR_H"
+as_fn_append ac_header_c_list " minix/config.h minix_config_h HAVE_MINIX_CONFIG_H"
+as_fn_append ac_header_c_list " vfork.h vfork_h HAVE_VFORK_H"
+as_fn_append ac_func_c_list " fork HAVE_FORK"
+as_fn_append ac_func_c_list " vfork HAVE_VFORK"
+
+# Auxiliary files required by this configure script.
+ac_aux_files="ltmain.sh config.guess config.sub"
+
+# Locations in which to look for auxiliary files.
+ac_aux_dir_candidates="${srcdir}${PATH_SEPARATOR}${srcdir}/..${PATH_SEPARATOR}${srcdir}/../.."
+
+# Search for a directory containing all of the required auxiliary files,
+# $ac_aux_files, from the $PATH-style list $ac_aux_dir_candidates.
+# If we don't find one directory that contains all the files we need,
+# we report the set of missing files from the *first* directory in
+# $ac_aux_dir_candidates and give up.
+ac_missing_aux_files=""
+ac_first_candidate=:
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: looking for aux files: $ac_aux_files" >&5
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+as_found=false
+for as_dir in $ac_aux_dir_candidates
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+  as_found=:
+
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}:  trying $as_dir" >&5
+  ac_aux_dir_found=yes
+  ac_install_sh=
+  for ac_aux in $ac_aux_files
+  do
+    # As a special case, if "install-sh" is required, that requirement
+    # can be satisfied by any of "install-sh", "install.sh", or "shtool",
+    # and $ac_install_sh is set appropriately for whichever one is found.
+    if test x"$ac_aux" = x"install-sh"
+    then
+      if test -f "${as_dir}install-sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install-sh found" >&5
+        ac_install_sh="${as_dir}install-sh -c"
+      elif test -f "${as_dir}install.sh"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}install.sh found" >&5
+        ac_install_sh="${as_dir}install.sh -c"
+      elif test -f "${as_dir}shtool"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}shtool found" >&5
+        ac_install_sh="${as_dir}shtool install -c"
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} install-sh"
+        else
+          break
+        fi
+      fi
+    else
+      if test -f "${as_dir}${ac_aux}"; then
+        printf "%s\n" "$as_me:${as_lineno-$LINENO}:   ${as_dir}${ac_aux} found" >&5
+      else
+        ac_aux_dir_found=no
+        if $ac_first_candidate; then
+          ac_missing_aux_files="${ac_missing_aux_files} ${ac_aux}"
+        else
+          break
+        fi
+      fi
+    fi
+  done
+  if test "$ac_aux_dir_found" = yes; then
+    ac_aux_dir="$as_dir"
+    break
+  fi
+  ac_first_candidate=false
+
+  as_found=false
+done
+IFS=$as_save_IFS
+if $as_found
+then :
+
+else $as_nop
+  as_fn_error $? "cannot find required auxiliary files:$ac_missing_aux_files" "$LINENO" 5
+fi
+
+
+# These three variables are undocumented and unsupported,
+# and are intended to be withdrawn in a future Autoconf release.
+# They can cause serious problems if a builder's source tree is in a directory
+# whose full name contains unusual characters.
+if test -f "${ac_aux_dir}config.guess"; then
+  ac_config_guess="$SHELL ${ac_aux_dir}config.guess"
+fi
+if test -f "${ac_aux_dir}config.sub"; then
+  ac_config_sub="$SHELL ${ac_aux_dir}config.sub"
+fi
+if test -f "$ac_aux_dir/configure"; then
+  ac_configure="$SHELL ${ac_aux_dir}configure"
+fi
+
 # Check that the precious variables saved in the cache have kept the same
 # value.
 ac_cache_corrupted=false
@@ -2792,12 +3179,12 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
-$as_echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
-$as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
@@ -2806,24 +3193,24 @@ $as_echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { $as_echo "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
-$as_echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { $as_echo "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
-$as_echo "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ $as_echo "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
-$as_echo "$as_me:   former value:  \`$ac_old_val'" >&2;}
-	{ $as_echo "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
-$as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
   if test "$ac_new_set" = set; then
     case $ac_new_val in
-    *\'*) ac_arg=$ac_var=`$as_echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_arg=$ac_var=`printf "%s\n" "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
     *) ac_arg=$ac_var=$ac_new_val ;;
     esac
     case " $ac_configure_args " in
@@ -2833,11 +3220,12 @@ $as_echo "$as_me:   current value: \`$ac_new_val'" >&2;}
   fi
 done
 if $ac_cache_corrupted; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-  { $as_echo "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
-$as_echo "$as_me: error: changes in the environment can compromise the build" >&2;}
-  as_fn_error $? "run \`make distclean' and/or \`rm $cache_file' and start over" "$LINENO" 5
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
+printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
+  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
+	    and start over" "$LINENO" 5
 fi
 ## -------------------- ##
 ## Main body of script. ##
@@ -2852,13 +3240,13 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 UNBOUND_VERSION_MAJOR=1
 
-UNBOUND_VERSION_MINOR=19
+UNBOUND_VERSION_MINOR=20
 
-UNBOUND_VERSION_MICRO=3
+UNBOUND_VERSION_MICRO=0
 
 
 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=26
+LIBUNBOUND_REVISION=27
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -2952,6 +3340,7 @@ LIBUNBOUND_AGE=1
 # 1.19.1 had 9:24:1
 # 1.19.2 had 9:25:1
 # 1.19.3 had 9:26:1
+# 1.20.0 had 9:27:1
 
 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -2978,12 +3367,19 @@ LIBUNBOUND_AGE=1
 
 cmdln="`echo $@ | sed -e 's/\\\\/\\\\\\\\/g' | sed -e 's/"/\\\\"/'g`"
 
-cat >>confdefs.h <<_ACEOF
-#define CONFCMDLINE "$cmdln"
-_ACEOF
+printf "%s\n" "#define CONFCMDLINE \"$cmdln\"" >>confdefs.h
 
 
 CFLAGS="$CFLAGS"
+
+
+
+
+
+
+
+
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -2992,11 +3388,12 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
@@ -3004,11 +3401,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}gcc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3019,11 +3420,11 @@ fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -3032,11 +3433,12 @@ if test -z "$ac_cv_prog_CC"; then
   ac_ct_CC=$CC
   # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
@@ -3044,11 +3446,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="gcc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3059,11 +3465,11 @@ fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-$as_echo "$ac_ct_CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_CC" = x; then
@@ -3071,8 +3477,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -3085,11 +3491,12 @@ if test -z "$CC"; then
           if test -n "$ac_tool_prefix"; then
     # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}cc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
@@ -3097,11 +3504,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="${ac_tool_prefix}cc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3112,11 +3523,11 @@ fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -3125,11 +3536,12 @@ fi
 if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
@@ -3138,15 +3550,19 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    if test "$as_dir$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
        ac_prog_rejected=yes
        continue
      fi
     ac_cv_prog_CC="cc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3162,18 +3578,18 @@ if test $ac_prog_rejected = yes; then
     # However, it has the same basename, so the bogon will be chosen
     # first if we set CC to just the basename; use the full file name.
     shift
-    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+    ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
   fi
 fi
 fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -3184,11 +3600,12 @@ if test -z "$CC"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
@@ -3196,11 +3613,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3211,11 +3632,11 @@ fi
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -3228,11 +3649,12 @@ if test -z "$CC"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
@@ -3240,11 +3662,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_CC="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -3255,11 +3681,11 @@ fi
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-$as_echo "$ac_ct_CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -3271,8 +3697,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     CC=$ac_ct_CC
@@ -3280,25 +3706,129 @@ esac
 fi
 
 fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
+set dummy ${ac_tool_prefix}clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
 
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
 
-test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "clang", so it can be a program name with args.
+set dummy clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+
+
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
 See \`config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
-$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
 set X $ac_compile
 ac_compiler=$2
-for ac_option in --version -v -V -qversion; do
+for ac_option in --version -v -V -qversion -version; do
   { { ac_try="$ac_compiler $ac_option >&5"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compiler $ac_option >&5") 2>conftest.err
   ac_status=$?
   if test -s conftest.err; then
@@ -3308,7 +3838,7 @@ $as_echo "$ac_try_echo"; } >&5
     cat conftest.er1 >&5
   fi
   rm -f conftest.er1 conftest.err
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 done
 
@@ -3316,7 +3846,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
@@ -3328,9 +3858,9 @@ ac_clean_files="$ac_clean_files a.out a.out.dSYM a.exe b.out"
 # Try to create an executable without -o first, disregard a.out.
 # It will help us diagnose broken compilers, and finding out an intuition
 # of exeext.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
-$as_echo_n "checking whether the C compiler works... " >&6; }
-ac_link_default=`$as_echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler works" >&5
+printf %s "checking whether the C compiler works... " >&6; }
+ac_link_default=`printf "%s\n" "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
 
 # The possible output files:
 ac_files="a.out conftest.exe conftest a.exe a_out.exe b.out conftest.*"
@@ -3351,11 +3881,12 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link_default") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; then :
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
   # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
 # So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
@@ -3372,7 +3903,7 @@ do
 	# certainly right.
 	break;;
     *.* )
-	if test "${ac_cv_exeext+set}" = set && test "$ac_cv_exeext" != no;
+	if test ${ac_cv_exeext+y} && test "$ac_cv_exeext" != no;
 	then :; else
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
@@ -3388,44 +3919,46 @@ do
 done
 test "$ac_cv_exeext" = no && ac_cv_exeext=
 
-else
+else $as_nop
   ac_file=''
 fi
-if test -z "$ac_file"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-$as_echo "$as_me: failed program was:" >&5
+if test -z "$ac_file"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
 See \`config.log' for more details" "$LINENO" 5; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
-$as_echo_n "checking for C compiler default output file name... " >&6; }
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
-$as_echo "$ac_file" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
+printf %s "checking for C compiler default output file name... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_file" >&5
+printf "%s\n" "$ac_file" >&6; }
 ac_exeext=$ac_cv_exeext
 
 rm -f -r a.out a.out.dSYM a.exe conftest$ac_cv_exeext b.out
 ac_clean_files=$ac_clean_files_save
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
-$as_echo_n "checking for suffix of executables... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of executables" >&5
+printf %s "checking for suffix of executables... " >&6; }
 if { { ac_try="$ac_link"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; then :
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
   # If both `conftest.exe' and `conftest' are `present' (well, observable)
 # catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
 # work properly (i.e., refer to `conftest.exe'), while it won't with
@@ -3439,15 +3972,15 @@ for ac_file in conftest.exe conftest conftest.*; do
     * ) break;;
   esac
 done
-else
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 rm -f conftest conftest$ac_cv_exeext
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
-$as_echo "$ac_cv_exeext" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
+printf "%s\n" "$ac_cv_exeext" >&6; }
 
 rm -f conftest.$ac_ext
 EXEEXT=$ac_cv_exeext
@@ -3456,7 +3989,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdio.h>
 int
-main ()
+main (void)
 {
 FILE *f = fopen ("conftest.out", "w");
  return ferror (f) || fclose (f) != 0;
@@ -3468,8 +4001,8 @@ _ACEOF
 ac_clean_files="$ac_clean_files conftest.out"
 # Check that the compiler produces executables we can run.  If not, either
 # the compiler is broken, or we cross compile.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
-$as_echo_n "checking whether we are cross compiling... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we are cross compiling" >&5
+printf %s "checking whether we are cross compiling... " >&6; }
 if test "$cross_compiling" != yes; then
   { { ac_try="$ac_link"
 case "(($ac_try" in
@@ -3477,10 +4010,10 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_link") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
   if { ac_try='./conftest$ac_cv_exeext'
   { { case "(($ac_try" in
@@ -3488,39 +4021,40 @@ $as_echo "$ac_try_echo"; } >&5
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_try") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }; then
     cross_compiling=no
   else
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
-	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run C compiled programs.
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error 77 "cannot run C compiled programs.
 If you meant to cross compile, use \`--host'.
 See \`config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
-$as_echo "$cross_compiling" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
+printf "%s\n" "$cross_compiling" >&6; }
 
 rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
 ac_clean_files=$ac_clean_files_save
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
-$as_echo_n "checking for suffix of object files... " >&6; }
-if ${ac_cv_objext+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
+printf %s "checking for suffix of object files... " >&6; }
+if test ${ac_cv_objext+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
@@ -3534,11 +4068,12 @@ case "(($ac_try" in
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$ac_compile") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; then :
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+then :
   for ac_file in conftest.o conftest.obj conftest.*; do
   test -f "$ac_file" || continue;
   case $ac_file in
@@ -3547,31 +4082,32 @@ $as_echo "$ac_try_echo"; } >&5
        break;;
   esac
 done
-else
-  $as_echo "$as_me: failed program was:" >&5
+else $as_nop
+  printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 rm -f conftest.$ac_cv_objext conftest.$ac_ext
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
-$as_echo "$ac_cv_objext" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
+printf "%s\n" "$ac_cv_objext" >&6; }
 OBJEXT=$ac_cv_objext
 ac_objext=$OBJEXT
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
-$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if ${ac_cv_c_compiler_gnu+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+printf %s "checking whether the compiler supports GNU C... " >&6; }
+if test ${ac_cv_c_compiler_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 #ifndef __GNUC__
        choke me
@@ -3581,29 +4117,33 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_compiler_gnu=yes
-else
+else $as_nop
   ac_compiler_gnu=no
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
-$as_echo "$ac_cv_c_compiler_gnu" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
 if test $ac_compiler_gnu = yes; then
   GCC=yes
 else
   GCC=
 fi
-ac_test_CFLAGS=${CFLAGS+set}
+ac_test_CFLAGS=${CFLAGS+y}
 ac_save_CFLAGS=$CFLAGS
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
-$as_echo_n "checking whether $CC accepts -g... " >&6; }
-if ${ac_cv_prog_cc_g+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+printf %s "checking whether $CC accepts -g... " >&6; }
+if test ${ac_cv_prog_cc_g+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
@@ -3612,57 +4152,60 @@ else
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_prog_cc_g=yes
-else
+else $as_nop
   CFLAGS=""
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
 
-else
+else $as_nop
   ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_prog_cc_g=yes
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
    ac_c_werror_flag=$ac_save_c_werror_flag
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
-$as_echo "$ac_cv_prog_cc_g" >&6; }
-if test "$ac_test_CFLAGS" = set; then
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+if test $ac_test_CFLAGS; then
   CFLAGS=$ac_save_CFLAGS
 elif test $ac_cv_prog_cc_g = yes; then
   if test "$GCC" = yes; then
@@ -3677,232 +4220,144 @@ else
     CFLAGS=
   fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
-$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if ${ac_cv_prog_cc_c89+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_prog_cc_c89=no
+ac_prog_cc_stdc=no
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+printf %s "checking for $CC option to enable C11 features... " >&6; }
+if test ${ac_cv_prog_cc_c11+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c11=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdarg.h>
-#include <stdio.h>
-struct stat;
-/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
-struct buf { int x; };
-FILE * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
-{
-  return p[i];
-}
-static char *f (char * (*g) (char **, int), char **p, ...)
-{
-  char *s;
-  va_list v;
-  va_start (v,p);
-  s = g (p, va_arg (v,int));
-  va_end (v);
-  return s;
-}
-
-/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
-   function prototypes and stuff, but not '\xHH' hex character constants.
-   These don't provoke an error unfortunately, instead are silently treated
-   as 'x'.  The following induces an error, until -std is added to get
-   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
-   array size at least.  It's necessary to write '\x00'==0 to get something
-   that's true only with -std.  */
-int osf4_cc_array ['\x00' == 0 ? 1 : -1];
-
-/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
-   inside strings and character constants.  */
-#define FOO(x) 'x'
-int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
-
-int test (int i, double x);
-struct s1 {int (*f) (int a);};
-struct s2 {int (*f) (double a);};
-int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
-int argc;
-char **argv;
-int
-main ()
-{
-return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
-  ;
-  return 0;
-}
+$ac_c_conftest_c11_program
 _ACEOF
-for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
-	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+for ac_arg in '' -std=gnu11
 do
   CC="$ac_save_CC $ac_arg"
-  if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_prog_cc_c89=$ac_arg
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c11=$ac_arg
 fi
-rm -f core conftest.err conftest.$ac_objext
-  test "x$ac_cv_prog_cc_c89" != "xno" && break
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c11" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
-
-fi
-# AC_CACHE_VAL
-case "x$ac_cv_prog_cc_c89" in
-  x)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-$as_echo "none needed" >&6; } ;;
-  xno)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-$as_echo "unsupported" >&6; } ;;
-  *)
-    CC="$CC $ac_cv_prog_cc_c89"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
-$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
-esac
-if test "x$ac_cv_prog_cc_c89" != xno; then :
-
-fi
-
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
-$as_echo_n "checking how to run the C preprocessor... " >&6; }
-# On Suns, sometimes $CPP names a directory.
-if test -n "$CPP" && test -d "$CPP"; then
-  CPP=
 fi
-if test -z "$CPP"; then
-  if ${ac_cv_prog_CPP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-      # Double quotes because CPP needs to be expanded
-    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
-    do
-      ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
-do
-  # Use a header file that comes with gcc, so configuring glibc
-  # with a fresh cross-compiler works.
-  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-  # <limits.h> exists even on freestanding compilers.
-  # On the NeXT, cc -E runs the code through the compiler's parser,
-  # not just through cpp. "Syntax error" is here to catch this case.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-		     Syntax error
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
 
-else
-  # Broken: fails on valid input.
-continue
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
-  # OK, works on sane cases.  Now check whether nonexistent headers
-  # can be detected and how.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+if test "x$ac_cv_prog_cc_c11" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c11" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+     CC="$CC $ac_cv_prog_cc_c11"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
+  ac_prog_cc_stdc=c11
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+printf %s "checking for $CC option to enable C99 features... " >&6; }
+if test ${ac_cv_prog_cc_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c99=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <ac_nonexistent.h>
+$ac_c_conftest_c99_program
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  # Broken: success on invalid input.
-continue
-else
-  # Passes both tests.
-ac_preproc_ok=:
-break
+for ac_arg in '' -std=gnu99 -std=c99 -c99 -qlanglvl=extc1x -qlanglvl=extc99 -AC99 -D_STDC_C99=
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c99=$ac_arg
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.i conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then :
-  break
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
 fi
 
-    done
-    ac_cv_prog_CPP=$CPP
-
+if test "x$ac_cv_prog_cc_c99" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c99" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+     CC="$CC $ac_cv_prog_cc_c99"
 fi
-  CPP=$ac_cv_prog_CPP
-else
-  ac_cv_prog_CPP=$CPP
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
+  ac_prog_cc_stdc=c99
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
-$as_echo "$CPP" >&6; }
-ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
-do
-  # Use a header file that comes with gcc, so configuring glibc
-  # with a fresh cross-compiler works.
-  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-  # <limits.h> exists even on freestanding compilers.
-  # On the NeXT, cc -E runs the code through the compiler's parser,
-  # not just through cpp. "Syntax error" is here to catch this case.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-		     Syntax error
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-
-else
-  # Broken: fails on valid input.
-continue
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
-  # OK, works on sane cases.  Now check whether nonexistent headers
-  # can be detected and how.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+printf %s "checking for $CC option to enable C89 features... " >&6; }
+if test ${ac_cv_prog_cc_c89+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c89=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <ac_nonexistent.h>
+$ac_c_conftest_c89_program
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  # Broken: success on invalid input.
-continue
-else
-  # Passes both tests.
-ac_preproc_ok=:
-break
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c89=$ac_arg
 fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.i conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then :
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
 
-else
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+if test "x$ac_cv_prog_cc_c89" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c89" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+     CC="$CC $ac_cv_prog_cc_c89"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
+  ac_prog_cc_stdc=c89
+fi
 fi
 
 ac_ext=c
@@ -3912,329 +4367,179 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
-$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if ${ac_cv_path_GREP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -z "$GREP"; then
-  ac_path_GREP_found=false
-  # Loop through the user's path and test for each of PROGNAME-LIST
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+ac_header= ac_cache=
+for ac_item in $ac_header_c_list
 do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in grep ggrep; do
-    for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_GREP" || continue
-# Check for GNU ac_path_GREP and select it if it is found.
-  # Check for GNU $ac_path_GREP
-case `"$ac_path_GREP" --version 2>&1` in
-*GNU*)
-  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
-*)
-  ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
-  while :
-  do
-    cat "conftest.in" "conftest.in" >"conftest.tmp"
-    mv "conftest.tmp" "conftest.in"
-    cp "conftest.in" "conftest.nl"
-    $as_echo 'GREP' >> "conftest.nl"
-    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
-    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_GREP_max-0}; then
-      # Best one so far, save it but keep looking for a better one
-      ac_cv_path_GREP="$ac_path_GREP"
-      ac_path_GREP_max=$ac_count
+  if test $ac_cache; then
+    ac_fn_c_check_header_compile "$LINENO" $ac_header ac_cv_header_$ac_cache "$ac_includes_default"
+    if eval test \"x\$ac_cv_header_$ac_cache\" = xyes; then
+      printf "%s\n" "#define $ac_item 1" >> confdefs.h
     fi
-    # 10*(2^10) chars as input seems more than enough
-    test $ac_count -gt 10 && break
-  done
-  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
-esac
-
-      $ac_path_GREP_found && break 3
-    done
-  done
-  done
-IFS=$as_save_IFS
-  if test -z "$ac_cv_path_GREP"; then
-    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+    ac_header= ac_cache=
+  elif test $ac_header; then
+    ac_cache=$ac_item
+  else
+    ac_header=$ac_item
   fi
-else
-  ac_cv_path_GREP=$GREP
-fi
+done
 
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
-$as_echo "$ac_cv_path_GREP" >&6; }
- GREP="$ac_cv_path_GREP"
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
-$as_echo_n "checking for egrep... " >&6; }
-if ${ac_cv_path_EGREP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
-   then ac_cv_path_EGREP="$GREP -E"
-   else
-     if test -z "$EGREP"; then
-  ac_path_EGREP_found=false
-  # Loop through the user's path and test for each of PROGNAME-LIST
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in egrep; do
-    for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_EGREP" || continue
-# Check for GNU ac_path_EGREP and select it if it is found.
-  # Check for GNU $ac_path_EGREP
-case `"$ac_path_EGREP" --version 2>&1` in
-*GNU*)
-  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
-*)
-  ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
-  while :
-  do
-    cat "conftest.in" "conftest.in" >"conftest.tmp"
-    mv "conftest.tmp" "conftest.in"
-    cp "conftest.in" "conftest.nl"
-    $as_echo 'EGREP' >> "conftest.nl"
-    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
-    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
-    as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
-      # Best one so far, save it but keep looking for a better one
-      ac_cv_path_EGREP="$ac_path_EGREP"
-      ac_path_EGREP_max=$ac_count
-    fi
-    # 10*(2^10) chars as input seems more than enough
-    test $ac_count -gt 10 && break
-  done
-  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
-esac
 
-      $ac_path_EGREP_found && break 3
-    done
-  done
-  done
-IFS=$as_save_IFS
-  if test -z "$ac_cv_path_EGREP"; then
-    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
-  fi
-else
-  ac_cv_path_EGREP=$EGREP
-fi
 
-   fi
+
+
+
+if test $ac_cv_header_stdlib_h = yes && test $ac_cv_header_string_h = yes
+then :
+
+printf "%s\n" "#define STDC_HEADERS 1" >>confdefs.h
+
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
-$as_echo "$ac_cv_path_EGREP" >&6; }
- EGREP="$ac_cv_path_EGREP"
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
-$as_echo_n "checking for ANSI C header files... " >&6; }
-if ${ac_cv_header_stdc+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+
+
+
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether it is safe to define __EXTENSIONS__" >&5
+printf %s "checking whether it is safe to define __EXTENSIONS__... " >&6; }
+if test ${ac_cv_safe_to_define___extensions__+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
 
+#         define __EXTENSIONS__ 1
+          $ac_includes_default
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_header_stdc=yes
-else
-  ac_cv_header_stdc=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-if test $ac_cv_header_stdc = yes; then
-  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <string.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "memchr" >/dev/null 2>&1; then :
-
-else
-  ac_cv_header_stdc=no
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_safe_to_define___extensions__=yes
+else $as_nop
+  ac_cv_safe_to_define___extensions__=no
 fi
-rm -f conftest*
-
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_safe_to_define___extensions__" >&5
+printf "%s\n" "$ac_cv_safe_to_define___extensions__" >&6; }
 
-if test $ac_cv_header_stdc = yes; then
-  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether _XOPEN_SOURCE should be defined" >&5
+printf %s "checking whether _XOPEN_SOURCE should be defined... " >&6; }
+if test ${ac_cv_should_define__xopen_source+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_should_define__xopen_source=no
+    if test $ac_cv_header_wchar_h = yes
+then :
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdlib.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "free" >/dev/null 2>&1; then :
 
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
+          #include <wchar.h>
+          mbstate_t x;
+int
+main (void)
+{
 
-fi
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
 
-if test $ac_cv_header_stdc = yes; then
-  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then :
-  :
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <ctype.h>
-#include <stdlib.h>
-#if ((' ' & 0x0FF) == 0x020)
-# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
-# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
-#else
-# define ISLOWER(c) \
-		   (('a' <= (c) && (c) <= 'i') \
-		     || ('j' <= (c) && (c) <= 'r') \
-		     || ('s' <= (c) && (c) <= 'z'))
-# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
-#endif
 
-#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+            #define _XOPEN_SOURCE 500
+            #include <wchar.h>
+            mbstate_t x;
 int
-main ()
+main (void)
 {
-  int i;
-  for (i = 0; i < 256; i++)
-    if (XOR (islower (i), ISLOWER (i))
-	|| toupper (i) != TOUPPER (i))
-      return 2;
+
+  ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-else
-  ac_cv_header_stdc=no
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_should_define__xopen_source=yes
 fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdc" >&5
-$as_echo "$ac_cv_header_stdc" >&6; }
-if test $ac_cv_header_stdc = yes; then
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_should_define__xopen_source" >&5
+printf "%s\n" "$ac_cv_should_define__xopen_source" >&6; }
 
-$as_echo "#define STDC_HEADERS 1" >>confdefs.h
+  printf "%s\n" "#define _ALL_SOURCE 1" >>confdefs.h
 
-fi
+  printf "%s\n" "#define _DARWIN_C_SOURCE 1" >>confdefs.h
 
-# On IRIX 5.3, sys/types and inttypes.h are conflicting.
-for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
-		  inttypes.h stdint.h unistd.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
-"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-fi
+  printf "%s\n" "#define _GNU_SOURCE 1" >>confdefs.h
 
-done
+  printf "%s\n" "#define _HPUX_ALT_XOPEN_SOCKET_API 1" >>confdefs.h
 
+  printf "%s\n" "#define _NETBSD_SOURCE 1" >>confdefs.h
 
+  printf "%s\n" "#define _OPENBSD_SOURCE 1" >>confdefs.h
 
-  ac_fn_c_check_header_mongrel "$LINENO" "minix/config.h" "ac_cv_header_minix_config_h" "$ac_includes_default"
-if test "x$ac_cv_header_minix_config_h" = xyes; then :
-  MINIX=yes
-else
-  MINIX=
-fi
+  printf "%s\n" "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h
 
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1" >>confdefs.h
 
-  if test "$MINIX" = yes; then
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_BFP_EXT__ 1" >>confdefs.h
 
-$as_echo "#define _POSIX_SOURCE 1" >>confdefs.h
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_DFP_EXT__ 1" >>confdefs.h
 
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1" >>confdefs.h
 
-$as_echo "#define _POSIX_1_SOURCE 2" >>confdefs.h
+  printf "%s\n" "#define __STDC_WANT_IEC_60559_TYPES_EXT__ 1" >>confdefs.h
 
+  printf "%s\n" "#define __STDC_WANT_LIB_EXT2__ 1" >>confdefs.h
 
-$as_echo "#define _MINIX 1" >>confdefs.h
+  printf "%s\n" "#define __STDC_WANT_MATH_SPEC_FUNCS__ 1" >>confdefs.h
 
-  fi
+  printf "%s\n" "#define _TANDEM_SOURCE 1" >>confdefs.h
 
+  if test $ac_cv_header_minix_config_h = yes
+then :
+  MINIX=yes
+    printf "%s\n" "#define _MINIX 1" >>confdefs.h
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether it is safe to define __EXTENSIONS__" >&5
-$as_echo_n "checking whether it is safe to define __EXTENSIONS__... " >&6; }
-if ${ac_cv_safe_to_define___extensions__+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
+    printf "%s\n" "#define _POSIX_SOURCE 1" >>confdefs.h
 
-#         define __EXTENSIONS__ 1
-          $ac_includes_default
-int
-main ()
-{
+    printf "%s\n" "#define _POSIX_1_SOURCE 2" >>confdefs.h
 
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_safe_to_define___extensions__=yes
-else
-  ac_cv_safe_to_define___extensions__=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+else $as_nop
+  MINIX=
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_safe_to_define___extensions__" >&5
-$as_echo "$ac_cv_safe_to_define___extensions__" >&6; }
-  test $ac_cv_safe_to_define___extensions__ = yes &&
-    $as_echo "#define __EXTENSIONS__ 1" >>confdefs.h
-
-  $as_echo "#define _ALL_SOURCE 1" >>confdefs.h
-
-  $as_echo "#define _GNU_SOURCE 1" >>confdefs.h
+  if test $ac_cv_safe_to_define___extensions__ = yes
+then :
+  printf "%s\n" "#define __EXTENSIONS__ 1" >>confdefs.h
 
-  $as_echo "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h
-
-  $as_echo "#define _TANDEM_SOURCE 1" >>confdefs.h
+fi
+  if test $ac_cv_should_define__xopen_source = yes
+then :
+  printf "%s\n" "#define _XOPEN_SOURCE 500" >>confdefs.h
 
+fi
 
 if test "$ac_cv_header_minix_config_h" = "yes"; then
 
-$as_echo "#define _NETBSD_SOURCE 1" >>confdefs.h
+printf "%s\n" "#define _NETBSD_SOURCE 1" >>confdefs.h
 
 fi
 
@@ -4272,7 +4577,8 @@ else
 fi
 
 # Check whether --with-conf_file was given.
-if test "${with_conf_file+set}" = set; then :
+if test ${with_conf_file+y}
+then :
   withval=$with_conf_file; ub_conf_file="$withval"
 fi
 
@@ -4280,16 +4586,14 @@ fi
 hdr_config="`echo $ub_conf_file | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define CONFIGFILE "$hdr_config"
-_ACEOF
+printf "%s\n" "#define CONFIGFILE \"$hdr_config\"" >>confdefs.h
 
 ub_conf_dir=`$as_dirname -- "$ub_conf_file" ||
 $as_expr X"$ub_conf_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$ub_conf_file" : 'X\(//\)[^/]' \| \
 	 X"$ub_conf_file" : 'X\(//\)$' \| \
 	 X"$ub_conf_file" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$ub_conf_file" |
+printf "%s\n" X"$ub_conf_file" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -4312,9 +4616,10 @@ $as_echo X"$ub_conf_file" |
 # Determine run, chroot directory and pidfile locations
 
 # Check whether --with-run-dir was given.
-if test "${with_run_dir+set}" = set; then :
+if test ${with_run_dir+y}
+then :
   withval=$with_run_dir; UNBOUND_RUN_DIR="$withval"
-else
+else $as_nop
   if test $on_mingw = no; then
     UNBOUND_RUN_DIR=`dirname "$ub_conf_file"`
 else
@@ -4327,16 +4632,15 @@ fi
 hdr_run="`echo $UNBOUND_RUN_DIR | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define RUN_DIR "$hdr_run"
-_ACEOF
+printf "%s\n" "#define RUN_DIR \"$hdr_run\"" >>confdefs.h
 
 
 
 # Check whether --with-chroot-dir was given.
-if test "${with_chroot_dir+set}" = set; then :
+if test ${with_chroot_dir+y}
+then :
   withval=$with_chroot_dir; UNBOUND_CHROOT_DIR="$withval"
-else
+else $as_nop
   if test $on_mingw = no; then
     UNBOUND_CHROOT_DIR="$UNBOUND_RUN_DIR"
 else
@@ -4349,31 +4653,29 @@ fi
 hdr_chroot="`echo $UNBOUND_CHROOT_DIR | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define CHROOT_DIR "$hdr_chroot"
-_ACEOF
+printf "%s\n" "#define CHROOT_DIR \"$hdr_chroot\"" >>confdefs.h
 
 
 
 # Check whether --with-share-dir was given.
-if test "${with_share_dir+set}" = set; then :
+if test ${with_share_dir+y}
+then :
   withval=$with_share_dir; UNBOUND_SHARE_DIR="$withval"
-else
+else $as_nop
   UNBOUND_SHARE_DIR="$UNBOUND_RUN_DIR"
 fi
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SHARE_DIR "$UNBOUND_SHARE_DIR"
-_ACEOF
+printf "%s\n" "#define SHARE_DIR \"$UNBOUND_SHARE_DIR\"" >>confdefs.h
 
 
 
 # Check whether --with-pidfile was given.
-if test "${with_pidfile+set}" = set; then :
+if test ${with_pidfile+y}
+then :
   withval=$with_pidfile; UNBOUND_PIDFILE="$withval"
-else
+else $as_nop
   if test $on_mingw = no; then
     UNBOUND_PIDFILE="$UNBOUND_RUN_DIR/unbound.pid"
 else
@@ -4386,16 +4688,15 @@ fi
 hdr_pid="`echo $UNBOUND_PIDFILE | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define PIDFILE "$hdr_pid"
-_ACEOF
+printf "%s\n" "#define PIDFILE \"$hdr_pid\"" >>confdefs.h
 
 
 
 # Check whether --with-rootkey-file was given.
-if test "${with_rootkey_file+set}" = set; then :
+if test ${with_rootkey_file+y}
+then :
   withval=$with_rootkey_file; UNBOUND_ROOTKEY_FILE="$withval"
-else
+else $as_nop
   if test $on_mingw = no; then
     UNBOUND_ROOTKEY_FILE="$UNBOUND_RUN_DIR/root.key"
 else
@@ -4408,16 +4709,15 @@ fi
 hdr_rkey="`echo $UNBOUND_ROOTKEY_FILE | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define ROOT_ANCHOR_FILE "$hdr_rkey"
-_ACEOF
+printf "%s\n" "#define ROOT_ANCHOR_FILE \"$hdr_rkey\"" >>confdefs.h
 
 
 
 # Check whether --with-rootcert-file was given.
-if test "${with_rootcert_file+set}" = set; then :
+if test ${with_rootcert_file+y}
+then :
   withval=$with_rootcert_file; UNBOUND_ROOTCERT_FILE="$withval"
-else
+else $as_nop
   if test $on_mingw = no; then
     UNBOUND_ROOTCERT_FILE="$UNBOUND_RUN_DIR/icannbundle.pem"
 else
@@ -4430,48 +4730,115 @@ fi
 hdr_rpem="`echo $UNBOUND_ROOTCERT_FILE | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define ROOT_CERT_FILE "$hdr_rpem"
-_ACEOF
+printf "%s\n" "#define ROOT_CERT_FILE \"$hdr_rpem\"" >>confdefs.h
 
 
 
 # Check whether --with-username was given.
-if test "${with_username+set}" = set; then :
+if test ${with_username+y}
+then :
   withval=$with_username; UNBOUND_USERNAME="$withval"
-else
+else $as_nop
   UNBOUND_USERNAME="unbound"
 fi
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define UB_USERNAME "$UNBOUND_USERNAME"
-_ACEOF
+printf "%s\n" "#define UB_USERNAME \"$UNBOUND_USERNAME\"" >>confdefs.h
 
 
 
-$as_echo "#define WINVER 0x0502" >>confdefs.h
+printf "%s\n" "#define WINVER 0x0502" >>confdefs.h
 
 wnvs=`echo $PACKAGE_VERSION | sed -e 's/^[^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\).*$/\1,\2,\3,\4/' -e 's/^[^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9][^0-9]*\([0-9][0-9]*\)[^0-9]*$/\1,\2,\3,0/' `
 
 
-cat >>confdefs.h <<_ACEOF
-#define RSRC_PACKAGE_VERSION $wnvs
-_ACEOF
+printf "%s\n" "#define RSRC_PACKAGE_VERSION $wnvs" >>confdefs.h
 
 
-# Checks for typedefs, structures, and compiler characteristics.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
-$as_echo_n "checking for an ANSI C-conforming const... " >&6; }
-if ${ac_cv_c_const+:} false; then :
-  $as_echo_n "(cached) " >&6
+# Check for 'grep -e' program, here, since ACX_CHECK_FLTO needs that.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
+printf %s "checking for grep that handles long lines and -e... " >&6; }
+if test ${ac_cv_path_GREP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -z "$GREP"; then
+  ac_path_GREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in grep ggrep
+   do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_GREP" || continue
+# Check for GNU ac_path_GREP and select it if it is found.
+  # Check for GNU $ac_path_GREP
+case `"$ac_path_GREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+*)
+  ac_count=0
+  printf %s 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    printf "%s\n" 'GREP' >> "conftest.nl"
+    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_GREP="$ac_path_GREP"
+      ac_path_GREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_GREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_GREP"; then
+    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
 else
+  ac_cv_path_GREP=$GREP
+fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
+printf "%s\n" "$ac_cv_path_GREP" >&6; }
+ GREP="$ac_cv_path_GREP"
+
+
+
+# Checks for typedefs, structures, and compiler characteristics.
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for an ANSI C-conforming const" >&5
+printf %s "checking for an ANSI C-conforming const... " >&6; }
+if test ${ac_cv_c_const+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 #ifndef __cplusplus
@@ -4484,7 +4851,7 @@ main ()
   /* NEC SVR4.0.2 mips cc rejects this.  */
   struct point {int x, y;};
   static struct point const zero = {0,0};
-  /* AIX XL C 1.02.0.0 rejects this.
+  /* IBM XL C 1.02.0.0 rejects this.
      It does not let you subtract one const X* pointer from another in
      an arm of an if-expression whose if-part is not a constant
      expression */
@@ -4512,7 +4879,7 @@ main ()
     iptr p = 0;
     ++p;
   }
-  { /* AIX XL C 1.02.0.0 rejects this sort of thing, saying
+  { /* IBM XL C 1.02.0.0 rejects this sort of thing, saying
        "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
     struct s { int j; const int *ap[3]; } bx;
     struct s *b = &bx; b->j = 5;
@@ -4528,18 +4895,19 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_const=yes
-else
+else $as_nop
   ac_cv_c_const=no
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
-$as_echo "$ac_cv_c_const" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_const" >&5
+printf "%s\n" "$ac_cv_c_const" >&6; }
 if test $ac_cv_c_const = no; then
 
-$as_echo "#define const /**/" >>confdefs.h
+printf "%s\n" "#define const /**/" >>confdefs.h
 
 fi
 
@@ -4554,12 +4922,13 @@ default_cflags=no
 if test "x$CFLAGS" = "x" ; then
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -g" >&5
-$as_echo_n "checking whether $CC supports -g... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -g" >&5
+printf %s "checking whether $CC supports -g... " >&6; }
 cache=`echo g | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -g -c conftest.c 2>&1`"; then
@@ -4572,25 +4941,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -g"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -O2" >&5
-$as_echo_n "checking whether $CC supports -O2... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -O2" >&5
+printf %s "checking whether $CC supports -O2... " >&6; }
 cache=`echo O2 | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -O2 -c conftest.c 2>&1`"; then
@@ -4603,314 +4973,753 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -O2"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 default_cflags=yes
 fi
-   case $ac_cv_prog_cc_stdc in #(
-  no) :
-    ac_cv_prog_cc_c99=no; ac_cv_prog_cc_c89=no ;; #(
-  *) :
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C99" >&5
-$as_echo_n "checking for $CC option to accept ISO C99... " >&6; }
-if ${ac_cv_prog_cc_c99+:} false; then :
-  $as_echo_n "(cached) " >&6
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
 else
-  ac_cv_prog_cc_c99=no
-ac_save_CC=$CC
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <wchar.h>
-#include <stdio.h>
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
 
-// Check varargs macros.  These examples are taken from C99 6.10.3.5.
-#define debug(...) fprintf (stderr, __VA_ARGS__)
-#define showlist(...) puts (#__VA_ARGS__)
-#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
-static void
-test_varargs_macros (void)
-{
-  int x = 1234;
-  int y = 5678;
-  debug ("Flag");
-  debug ("X = %d\n", x);
-  showlist (The first, second, and third items.);
-  report (x>y, "x is %d but y is %d", x, y);
-}
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
 
-// Check long long types.
-#define BIG64 18446744073709551615ull
-#define BIG32 4294967295ul
-#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
-#if !BIG_OK
-  your preprocessor is broken;
-#endif
-#if BIG_OK
-#else
-  your preprocessor is broken;
-#endif
-static long long int bignum = -9223372036854775807LL;
-static unsigned long long int ubignum = BIG64;
 
-struct incomplete_array
-{
-  int datasize;
-  double data[];
-};
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
 
-struct named_init {
-  int number;
-  const wchar_t *name;
-  double average;
-};
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
 
-typedef const char *ccp;
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
 
-static inline int
-test_restrict (ccp restrict text)
-{
-  // See if C++-style comments work.
-  // Iterate through items via the restricted pointer.
-  // Also check for declarations in for loops.
-  for (unsigned int i = 0; *(text+i) != '\0'; ++i)
-    continue;
-  return 0;
-}
+if test -z "$CC"; then
+          if test -n "$ac_tool_prefix"; then
+    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
 
-// Check varargs and va_copy.
-static void
-test_varargs (const char *format, ...)
-{
-  va_list args;
-  va_start (args, format);
-  va_list args_copy;
-  va_copy (args_copy, args);
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
 
-  const char *str;
-  int number;
-  float fnumber;
 
-  while (*format)
-    {
-      switch (*format++)
-	{
-	case 's': // string
-	  str = va_arg (args_copy, const char *);
-	  break;
-	case 'd': // int
-	  number = va_arg (args_copy, int);
-	  break;
-	case 'f': // float
-	  fnumber = va_arg (args_copy, double);
-	  break;
-	default:
-	  break;
-	}
-    }
-  va_end (args_copy);
-  va_end (args);
-}
+  fi
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    if test "$as_dir$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl.exe
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl.exe
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$ac_ct_CC" && break
+done
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+fi
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}clang", so it can be a program name with args.
+set dummy ${ac_tool_prefix}clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
+printf "%s\n" "$CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "clang", so it can be a program name with args.
+set dummy clang; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="clang"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
+printf "%s\n" "$ac_ct_CC" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+  if test "x$ac_ct_CC" = x; then
+    CC=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    CC=$ac_ct_CC
+  fi
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+
+
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "no acceptable C compiler found in \$PATH
+See \`config.log' for more details" "$LINENO" 5; }
+
+# Provide some information about the compiler.
+printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
+set X $ac_compile
+ac_compiler=$2
+for ac_option in --version -v -V -qversion -version; do
+  { { ac_try="$ac_compiler $ac_option >&5"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+printf "%s\n" "$ac_try_echo"; } >&5
+  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    sed '10a\
+... rest of stderr output deleted ...
+         10q' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+  fi
+  rm -f conftest.er1 conftest.err
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }
+done
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports GNU C" >&5
+printf %s "checking whether the compiler supports GNU C... " >&6; }
+if test ${ac_cv_c_compiler_gnu+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
+#ifndef __GNUC__
+       choke me
+#endif
 
-  // Check bool.
-  _Bool success = false;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_compiler_gnu=yes
+else $as_nop
+  ac_compiler_gnu=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
 
-  // Check restrict.
-  if (test_restrict ("String literal") == 0)
-    success = true;
-  char *restrict newvar = "Another string";
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
+printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-  // Check varargs.
-  test_varargs ("s, d' f .", "string", 65, 34.234);
-  test_varargs_macros ();
+if test $ac_compiler_gnu = yes; then
+  GCC=yes
+else
+  GCC=
+fi
+ac_test_CFLAGS=${CFLAGS+y}
+ac_save_CFLAGS=$CFLAGS
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
+printf %s "checking whether $CC accepts -g... " >&6; }
+if test ${ac_cv_prog_cc_g+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_c_werror_flag=$ac_c_werror_flag
+   ac_c_werror_flag=yes
+   ac_cv_prog_cc_g=no
+   CFLAGS="-g"
+   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
 
-  // Check flexible array members.
-  struct incomplete_array *ia =
-    malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
-  ia->datasize = 10;
-  for (int i = 0; i < ia->datasize; ++i)
-    ia->data[i] = i * 1.234;
+int
+main (void)
+{
 
-  // Check named initializers.
-  struct named_init ni = {
-    .number = 34,
-    .name = L"Test wide string",
-    .average = 543.34343,
-  };
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+else $as_nop
+  CFLAGS=""
+      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
 
-  ni.number = 58;
+int
+main (void)
+{
 
-  int dynamic_array[ni.number];
-  dynamic_array[ni.number - 1] = 543;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
 
-  // work around unused variable warnings
-  return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x'
-	  || dynamic_array[ni.number - 1] != 543);
+else $as_nop
+  ac_c_werror_flag=$ac_save_c_werror_flag
+	 CFLAGS="-g"
+	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
 
   ;
   return 0;
 }
 _ACEOF
-for ac_arg in '' -std=gnu99 -std=c99 -c99 -AC99 -D_STDC_C99= -qlanglvl=extc99
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_g=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+   ac_c_werror_flag=$ac_save_c_werror_flag
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
+printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
+if test $ac_test_CFLAGS; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+ac_prog_cc_stdc=no
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C11 features" >&5
+printf %s "checking for $CC option to enable C11 features... " >&6; }
+if test ${ac_cv_prog_cc_c11+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c11=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c11_program
+_ACEOF
+for ac_arg in '' -std=gnu11
+do
+  CC="$ac_save_CC $ac_arg"
+  if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_prog_cc_c11=$ac_arg
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam
+  test "x$ac_cv_prog_cc_c11" != "xno" && break
+done
+rm -f conftest.$ac_ext
+CC=$ac_save_CC
+fi
+
+if test "x$ac_cv_prog_cc_c11" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c11" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
+     CC="$CC $ac_cv_prog_cc_c11"
+fi
+  ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
+  ac_prog_cc_stdc=c11
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C99 features" >&5
+printf %s "checking for $CC option to enable C99 features... " >&6; }
+if test ${ac_cv_prog_cc_c99+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_prog_cc_c99=no
+ac_save_CC=$CC
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_c_conftest_c99_program
+_ACEOF
+for ac_arg in '' -std=gnu99 -std=c99 -c99 -qlanglvl=extc1x -qlanglvl=extc99 -AC99 -D_STDC_C99=
 do
   CC="$ac_save_CC $ac_arg"
-  if ac_fn_c_try_compile "$LINENO"; then :
+  if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_prog_cc_c99=$ac_arg
 fi
-rm -f core conftest.err conftest.$ac_objext
+rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
+fi
 
+if test "x$ac_cv_prog_cc_c99" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c99" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
+     CC="$CC $ac_cv_prog_cc_c99"
 fi
-# AC_CACHE_VAL
-case "x$ac_cv_prog_cc_c99" in
-  x)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-$as_echo "none needed" >&6; } ;;
-  xno)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-$as_echo "unsupported" >&6; } ;;
-  *)
-    CC="$CC $ac_cv_prog_cc_c99"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
-$as_echo "$ac_cv_prog_cc_c99" >&6; } ;;
-esac
-if test "x$ac_cv_prog_cc_c99" != xno; then :
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
-$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if ${ac_cv_prog_cc_c89+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  ac_prog_cc_stdc=c99
+fi
+fi
+if test x$ac_prog_cc_stdc = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable C89 features" >&5
+printf %s "checking for $CC option to enable C89 features... " >&6; }
+if test ${ac_cv_prog_cc_c89+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdarg.h>
-#include <stdio.h>
-struct stat;
-/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
-struct buf { int x; };
-FILE * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
-{
-  return p[i];
-}
-static char *f (char * (*g) (char **, int), char **p, ...)
-{
-  char *s;
-  va_list v;
-  va_start (v,p);
-  s = g (p, va_arg (v,int));
-  va_end (v);
-  return s;
-}
-
-/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
-   function prototypes and stuff, but not '\xHH' hex character constants.
-   These don't provoke an error unfortunately, instead are silently treated
-   as 'x'.  The following induces an error, until -std is added to get
-   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
-   array size at least.  It's necessary to write '\x00'==0 to get something
-   that's true only with -std.  */
-int osf4_cc_array ['\x00' == 0 ? 1 : -1];
-
-/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
-   inside strings and character constants.  */
-#define FOO(x) 'x'
-int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
-
-int test (int i, double x);
-struct s1 {int (*f) (int a);};
-struct s2 {int (*f) (double a);};
-int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
-int argc;
-char **argv;
-int
-main ()
-{
-return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
-  ;
-  return 0;
-}
+$ac_c_conftest_c89_program
 _ACEOF
-for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
-	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
 do
   CC="$ac_save_CC $ac_arg"
-  if ac_fn_c_try_compile "$LINENO"; then :
+  if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_prog_cc_c89=$ac_arg
 fi
-rm -f core conftest.err conftest.$ac_objext
+rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
 rm -f conftest.$ac_ext
 CC=$ac_save_CC
+fi
 
+if test "x$ac_cv_prog_cc_c89" = xno
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
+printf "%s\n" "unsupported" >&6; }
+else $as_nop
+  if test "x$ac_cv_prog_cc_c89" = x
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
+printf "%s\n" "none needed" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
+     CC="$CC $ac_cv_prog_cc_c89"
 fi
-# AC_CACHE_VAL
-case "x$ac_cv_prog_cc_c89" in
-  x)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-$as_echo "none needed" >&6; } ;;
-  xno)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-$as_echo "unsupported" >&6; } ;;
-  *)
-    CC="$CC $ac_cv_prog_cc_c89"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
-$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
-esac
-if test "x$ac_cv_prog_cc_c89" != xno; then :
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
-else
-  ac_cv_prog_cc_stdc=no
+  ac_prog_cc_stdc=c89
 fi
-
 fi
- ;;
-esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO Standard C" >&5
-$as_echo_n "checking for $CC option to accept ISO Standard C... " >&6; }
-  if ${ac_cv_prog_cc_stdc+:} false; then :
-  $as_echo_n "(cached) " >&6
-fi
-
-  case $ac_cv_prog_cc_stdc in #(
-  no) :
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-$as_echo "unsupported" >&6; } ;; #(
-  '') :
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-$as_echo "none needed" >&6; } ;; #(
-  *) :
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_stdc" >&5
-$as_echo "$ac_cv_prog_cc_stdc" >&6; } ;;
-esac
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $CC dependency flag" >&5
-$as_echo_n "checking $CC dependency flag... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking $CC dependency flag" >&5
+printf %s "checking $CC dependency flag... " >&6; }
 echo 'void f(void){}' >conftest.c
 if test "`$CC -MM conftest.c 2>&1`" = "conftest.o: conftest.c"; then
 	DEPFLAG="-MM"
@@ -4921,20 +5730,21 @@ else
 	DEPFLAG="-MM"  # dunno do something
   fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $DEPFLAG" >&5
-$as_echo "$DEPFLAG" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DEPFLAG" >&5
+printf "%s\n" "$DEPFLAG" >&6; }
 rm -f conftest.c
 
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Werror" >&5
-$as_echo_n "checking whether $CC supports -Werror... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Werror" >&5
+printf %s "checking whether $CC supports -Werror... " >&6; }
 cache=`echo Werror | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -Werror -c conftest.c 2>&1`"; then
@@ -4947,25 +5757,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 ERRFLAG="-Werror"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 ERRFLAG="-errwarn"
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wall" >&5
-$as_echo_n "checking whether $CC supports -Wall... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wall" >&5
+printf %s "checking whether $CC supports -Wall... " >&6; }
 cache=`echo Wall | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -Wall -c conftest.c 2>&1`"; then
@@ -4978,13 +5789,13 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 ERRFLAG="$ERRFLAG -Wall"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 ERRFLAG="$ERRFLAG -errfmt"
 fi
@@ -4993,12 +5804,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -std=c99" >&5
-$as_echo_n "checking whether $CC supports -std=c99... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -std=c99" >&5
+printf %s "checking whether $CC supports -std=c99... " >&6; }
 cache=`echo std=c99 | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -std=c99 -c conftest.c 2>&1`"; then
@@ -5011,25 +5823,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 C99FLAG="-std=c99"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -xc99" >&5
-$as_echo_n "checking whether $CC supports -xc99... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -xc99" >&5
+printf %s "checking whether $CC supports -xc99... " >&6; }
 cache=`echo xc99 | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -xc99 -c conftest.c 2>&1`"; then
@@ -5042,42 +5855,44 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 C99FLAG="-xc99"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
-for ac_header in getopt.h time.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "getopt.h" "ac_cv_header_getopt_h" "$ac_includes_default
 "
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
+if test "x$ac_cv_header_getopt_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETOPT_H 1" >>confdefs.h
 
 fi
+ac_fn_c_check_header_compile "$LINENO" "time.h" "ac_cv_header_time_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_time_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_TIME_H 1" >>confdefs.h
 
-done
+fi
 
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE as a flag for $CC" >&5
-$as_echo_n "checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE as a flag for $CC... " >&6; }
-cache=`$as_echo "$C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE" | $as_tr_sh`
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE as a flag for $CC" >&5
+printf %s "checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE as a flag for $CC... " >&6; }
+cache=`printf "%s\n" "$C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE" | $as_tr_sh`
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include "confdefs.h"
@@ -5136,14 +5951,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_ALL_SOURCE $ERRFLAG -c conftest.c 2>&1"
@@ -5152,8 +5967,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5163,12 +5978,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE as a flag for $CC" >&5
-$as_echo_n "checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE as a flag for $CC... " >&6; }
-cache=`$as_echo "$C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE" | $as_tr_sh`
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE as a flag for $CC" >&5
+printf %s "checking whether we need $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE as a flag for $CC... " >&6; }
+cache=`printf "%s\n" "$C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE" | $as_tr_sh`
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include "confdefs.h"
@@ -5227,14 +6043,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS $C99FLAG -D__EXTENSIONS__ -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_ALL_SOURCE $ERRFLAG -c conftest.c 2>&1"
@@ -5243,8 +6059,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5254,12 +6070,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG as a flag for $CC" >&5
-$as_echo_n "checking whether we need $C99FLAG as a flag for $CC... " >&6; }
-cache=`$as_echo "$C99FLAG" | $as_tr_sh`
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need $C99FLAG as a flag for $CC" >&5
+printf %s "checking whether we need $C99FLAG as a flag for $CC... " >&6; }
+cache=`printf "%s\n" "$C99FLAG" | $as_tr_sh`
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <stdbool.h>
@@ -5291,14 +6108,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS $C99FLAG"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS $C99FLAG $ERRFLAG -c conftest.c 2>&1"
@@ -5307,8 +6124,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5318,12 +6135,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D_BSD_SOURCE -D_DEFAULT_SOURCE as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D_BSD_SOURCE -D_DEFAULT_SOURCE as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D_BSD_SOURCE -D_DEFAULT_SOURCE as a flag for $CC" >&5
+printf %s "checking whether we need -D_BSD_SOURCE -D_DEFAULT_SOURCE as a flag for $CC... " >&6; }
 cache=_D_BSD_SOURCE__D_DEFAULT_SOURCE
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <ctype.h>
@@ -5356,14 +6174,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D_BSD_SOURCE -D_DEFAULT_SOURCE $ERRFLAG -c conftest.c 2>&1"
@@ -5372,8 +6190,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5383,12 +6201,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D_GNU_SOURCE as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D_GNU_SOURCE as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D_GNU_SOURCE as a flag for $CC" >&5
+printf %s "checking whether we need -D_GNU_SOURCE as a flag for $CC... " >&6; }
 cache=_D_GNU_SOURCE
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <netinet/in.h>
@@ -5421,14 +6240,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D_GNU_SOURCE"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D_GNU_SOURCE $ERRFLAG -c conftest.c 2>&1"
@@ -5437,8 +6256,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5451,12 +6270,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D_GNU_SOURCE -D_FRSRESGID as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D_GNU_SOURCE -D_FRSRESGID as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D_GNU_SOURCE -D_FRSRESGID as a flag for $CC" >&5
+printf %s "checking whether we need -D_GNU_SOURCE -D_FRSRESGID as a flag for $CC... " >&6; }
 cache=_D_GNU_SOURCE__D_FRSRESGID
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <unistd.h>
@@ -5489,14 +6309,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D_GNU_SOURCE"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D_GNU_SOURCE -D_FRSRESGID $ERRFLAG -c conftest.c 2>&1"
@@ -5505,8 +6325,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5516,12 +6336,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D_POSIX_C_SOURCE=200112 as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D_POSIX_C_SOURCE=200112 as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D_POSIX_C_SOURCE=200112 as a flag for $CC" >&5
+printf %s "checking whether we need -D_POSIX_C_SOURCE=200112 as a flag for $CC... " >&6; }
 cache=_D_POSIX_C_SOURCE_200112
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include "confdefs.h"
@@ -5565,14 +6386,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D_POSIX_C_SOURCE=200112"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D_POSIX_C_SOURCE=200112 $ERRFLAG -c conftest.c 2>&1"
@@ -5581,8 +6402,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5592,12 +6413,13 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D__EXTENSIONS__ as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D__EXTENSIONS__ as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D__EXTENSIONS__ as a flag for $CC" >&5
+printf %s "checking whether we need -D__EXTENSIONS__ as a flag for $CC... " >&6; }
 cache=_D__EXTENSIONS__
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include "confdefs.h"
@@ -5647,14 +6469,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D__EXTENSIONS__"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D__EXTENSIONS__ $ERRFLAG -c conftest.c 2>&1"
@@ -5663,8 +6485,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -5675,12 +6497,14 @@ fi
 
 # debug mode flags warnings
 # Check whether --enable-checking was given.
-if test "${enable_checking+set}" = set; then :
+if test ${enable_checking+y}
+then :
   enableval=$enable_checking;
 fi
 
 # Check whether --enable-debug was given.
-if test "${enable_debug+set}" = set; then :
+if test ${enable_debug+y}
+then :
   enableval=$enable_debug;
 fi
 
@@ -5691,12 +6515,13 @@ case "$debug_enabled" in
         yes)
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -W" >&5
-$as_echo_n "checking whether $CC supports -W... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -W" >&5
+printf %s "checking whether $CC supports -W... " >&6; }
 cache=`echo W | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -W -c conftest.c 2>&1`"; then
@@ -5709,25 +6534,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -W"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wall" >&5
-$as_echo_n "checking whether $CC supports -Wall... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wall" >&5
+printf %s "checking whether $CC supports -Wall... " >&6; }
 cache=`echo Wall | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -Wall -c conftest.c 2>&1`"; then
@@ -5740,25 +6566,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -Wall"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wextra" >&5
-$as_echo_n "checking whether $CC supports -Wextra... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wextra" >&5
+printf %s "checking whether $CC supports -Wextra... " >&6; }
 cache=`echo Wextra | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -Wextra -c conftest.c 2>&1`"; then
@@ -5771,25 +6598,26 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -Wextra"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wdeclaration-after-statement" >&5
-$as_echo_n "checking whether $CC supports -Wdeclaration-after-statement... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -Wdeclaration-after-statement" >&5
+printf %s "checking whether $CC supports -Wdeclaration-after-statement... " >&6; }
 cache=`echo Wdeclaration-after-statement | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -Wdeclaration-after-statement -c conftest.c 2>&1`"; then
@@ -5802,19 +6630,19 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -Wdeclaration-after-statement"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
 
 
-$as_echo "#define UNBOUND_DEBUG /**/" >>confdefs.h
+printf "%s\n" "#define UNBOUND_DEBUG /**/" >>confdefs.h
 
 		;;
 	no|*)
@@ -5827,58 +6655,63 @@ if test "$default_cflags" = "yes"; then
 	# be able to turn off these options and set the CFLAGS wanted.
 
     # Check whether --enable-flto was given.
-if test "${enable_flto+set}" = set; then :
+if test ${enable_flto+y}
+then :
   enableval=$enable_flto;
 fi
 
-    if test "x$enable_flto" != "xno"; then :
+    if test "x$enable_flto" != "xno"
+then :
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports -flto" >&5
-$as_echo_n "checking if $CC supports -flto... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports -flto" >&5
+printf %s "checking if $CC supports -flto... " >&6; }
         BAKCFLAGS="$CFLAGS"
         CFLAGS="$CFLAGS -flto"
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
             if $CC $CFLAGS -o conftest conftest.c 2>&1 | $GREP -e "warning: no debug symbols in executable" -e "warning: object" >/dev/null; then
                 CFLAGS="$BAKCFLAGS"
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
             else
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
             fi
             rm -f conftest conftest.c conftest.o
 
-else
-  CFLAGS="$BAKCFLAGS" ; { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  CFLAGS="$BAKCFLAGS" ; { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 
 
     # Check whether --enable-pie was given.
-if test "${enable_pie+set}" = set; then :
+if test ${enable_pie+y}
+then :
   enableval=$enable_pie;
 fi
 
-    if test "x$enable_pie" = "xyes"; then :
+    if test "x$enable_pie" = "xyes"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports PIE" >&5
-$as_echo_n "checking if $CC supports PIE... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports PIE" >&5
+printf %s "checking if $CC supports PIE... " >&6; }
 	BAKLDFLAGS="$LDFLAGS"
 	BAKCFLAGS="$CFLAGS"
 	LDFLAGS="$LDFLAGS -pie"
@@ -5887,106 +6720,112 @@ $as_echo_n "checking if $CC supports PIE... " >&6; }
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 	    if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
 		LDFLAGS="$BAKLDFLAGS"
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	    else
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	    fi
 	    rm -f conftest conftest.c conftest.o
 
-else
-  LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  LDFLAGS="$BAKLDFLAGS" ; CFLAGS="$BAKCFLAGS" ; { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 
 
     # Check whether --enable-relro_now was given.
-if test "${enable_relro_now+set}" = set; then :
+if test ${enable_relro_now+y}
+then :
   enableval=$enable_relro_now;
 fi
 
-    if test "x$enable_relro_now" = "xyes"; then :
+    if test "x$enable_relro_now" = "xyes"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports -Wl,-z,relro,-z,now" >&5
-$as_echo_n "checking if $CC supports -Wl,-z,relro,-z,now... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC supports -Wl,-z,relro,-z,now" >&5
+printf %s "checking if $CC supports -Wl,-z,relro,-z,now... " >&6; }
 	BAKLDFLAGS="$LDFLAGS"
 	LDFLAGS="$LDFLAGS -Wl,-z,relro,-z,now"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 	    if $CC $CFLAGS $LDFLAGS -o conftest conftest.c 2>&1 | grep "warning: no debug symbols in executable" >/dev/null; then
 		LDFLAGS="$BAKLDFLAGS"
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	    else
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	    fi
 	    rm -f conftest conftest.c conftest.o
 
-else
-  LDFLAGS="$BAKLDFLAGS" ; { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  LDFLAGS="$BAKLDFLAGS" ; { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
-$as_echo_n "checking for inline... " >&6; }
-if ${ac_cv_c_inline+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inline" >&5
+printf %s "checking for inline... " >&6; }
+if test ${ac_cv_c_inline+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #ifndef __cplusplus
 typedef int foo_t;
-static $ac_kw foo_t static_foo () {return 0; }
-$ac_kw foo_t foo () {return 0; }
+static $ac_kw foo_t static_foo (void) {return 0; }
+$ac_kw foo_t foo (void) {return 0; }
 #endif
 
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_inline=$ac_kw
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   test "$ac_cv_c_inline" != no && break
 done
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
-$as_echo "$ac_cv_c_inline" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
+printf "%s\n" "$ac_cv_c_inline" >&6; }
 
 case $ac_cv_c_inline in
   inline | yes) ;;
@@ -6004,11 +6843,12 @@ _ACEOF
 esac
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"format\" attribute" >&5
-$as_echo_n "checking whether the C compiler (${CC-cc}) accepts the \"format\" attribute... " >&6; }
-if ${ac_cv_c_format_attribute+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"format\" attribute" >&5
+printf %s "checking whether the C compiler (${CC-cc}) accepts the \"format\" attribute... " >&6; }
+if test ${ac_cv_c_format_attribute+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_c_format_attribute=no
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6017,7 +6857,7 @@ void f (char *format, ...) __attribute__ ((format (printf, 1, 2)));
 void (*pf) (char *format, ...) __attribute__ ((format (printf, 1, 2)));
 
 int
-main ()
+main (void)
 {
 
    f ("%s", "str");
@@ -6026,30 +6866,32 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_format_attribute="yes"
-else
+else $as_nop
   ac_cv_c_format_attribute="no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_format_attribute" >&5
-$as_echo "$ac_cv_c_format_attribute" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_format_attribute" >&5
+printf "%s\n" "$ac_cv_c_format_attribute" >&6; }
 if test $ac_cv_c_format_attribute = yes; then
 
-$as_echo "#define HAVE_ATTR_FORMAT 1" >>confdefs.h
+printf "%s\n" "#define HAVE_ATTR_FORMAT 1" >>confdefs.h
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"unused\" attribute" >&5
-$as_echo_n "checking whether the C compiler (${CC-cc}) accepts the \"unused\" attribute... " >&6; }
-if ${ac_cv_c_unused_attribute+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"unused\" attribute" >&5
+printf %s "checking whether the C compiler (${CC-cc}) accepts the \"unused\" attribute... " >&6; }
+if test ${ac_cv_c_unused_attribute+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_c_unused_attribute=no
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6057,7 +6899,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 void f (char *u __attribute__((unused)));
 
 int
-main ()
+main (void)
 {
 
    f ("x");
@@ -6066,34 +6908,36 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_unused_attribute="yes"
-else
+else $as_nop
   ac_cv_c_unused_attribute="no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_unused_attribute" >&5
-$as_echo "$ac_cv_c_unused_attribute" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_unused_attribute" >&5
+printf "%s\n" "$ac_cv_c_unused_attribute" >&6; }
 if test $ac_cv_c_unused_attribute = yes; then
 
-$as_echo "#define HAVE_ATTR_UNUSED 1" >>confdefs.h
+printf "%s\n" "#define HAVE_ATTR_UNUSED 1" >>confdefs.h
 
 fi
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"weak\" attribute" >&5
-$as_echo_n "checking whether the C compiler (${CC-cc}) accepts the \"weak\" attribute... " >&6; }
-if ${ac_cv_c_weak_attribute+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"weak\" attribute" >&5
+printf %s "checking whether the C compiler (${CC-cc}) accepts the \"weak\" attribute... " >&6; }
+if test ${ac_cv_c_weak_attribute+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_c_weak_attribute=no
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6101,7 +6945,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 __attribute__((weak)) void f(int x) { printf("%d", x); }
 
 int
-main ()
+main (void)
 {
 
    f(1);
@@ -6110,35 +6954,37 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_weak_attribute="yes"
-else
+else $as_nop
   ac_cv_c_weak_attribute="no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_weak_attribute" >&5
-$as_echo "$ac_cv_c_weak_attribute" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_weak_attribute" >&5
+printf "%s\n" "$ac_cv_c_weak_attribute" >&6; }
 if test $ac_cv_c_weak_attribute = yes; then
 
-$as_echo "#define HAVE_ATTR_WEAK 1" >>confdefs.h
+printf "%s\n" "#define HAVE_ATTR_WEAK 1" >>confdefs.h
 
 
-$as_echo "#define ATTR_WEAK __attribute__((weak))" >>confdefs.h
+printf "%s\n" "#define ATTR_WEAK __attribute__((weak))" >>confdefs.h
 
 fi
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"noreturn\" attribute" >&5
-$as_echo_n "checking whether the C compiler (${CC-cc}) accepts the \"noreturn\" attribute... " >&6; }
-if ${ac_cv_c_noreturn_attribute+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"noreturn\" attribute" >&5
+printf %s "checking whether the C compiler (${CC-cc}) accepts the \"noreturn\" attribute... " >&6; }
+if test ${ac_cv_c_noreturn_attribute+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_c_noreturn_attribute=no
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6146,7 +6992,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 __attribute__((noreturn)) void f(int x) { printf("%d", x); }
 
 int
-main ()
+main (void)
 {
 
    f(1);
@@ -6155,24 +7001,25 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_c_noreturn_attribute="yes"
-else
+else $as_nop
   ac_cv_c_noreturn_attribute="no"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_noreturn_attribute" >&5
-$as_echo "$ac_cv_c_noreturn_attribute" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_noreturn_attribute" >&5
+printf "%s\n" "$ac_cv_c_noreturn_attribute" >&6; }
 if test $ac_cv_c_noreturn_attribute = yes; then
 
-$as_echo "#define HAVE_ATTR_NORETURN 1" >>confdefs.h
+printf "%s\n" "#define HAVE_ATTR_NORETURN 1" >>confdefs.h
 
 
-$as_echo "#define ATTR_NORETURN __attribute__((__noreturn__))" >>confdefs.h
+printf "%s\n" "#define ATTR_NORETURN __attribute__((__noreturn__))" >>confdefs.h
 
 fi
 
@@ -6189,11 +7036,12 @@ for ac_prog in flex lex
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LEX+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_LEX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$LEX"; then
   ac_cv_prog_LEX="$LEX" # Let the user override the test.
 else
@@ -6201,11 +7049,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_LEX="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6216,11 +7068,11 @@ fi
 fi
 LEX=$ac_cv_prog_LEX
 if test -n "$LEX"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LEX" >&5
-$as_echo "$LEX" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LEX" >&5
+printf "%s\n" "$LEX" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -6228,15 +7080,26 @@ fi
 done
 test -n "$LEX" || LEX=":"
 
-if test "x$LEX" != "x:"; then
-  cat >conftest.l <<_ACEOF
+  if test "x$LEX" != "x:"; then
+    cat >conftest.l <<_ACEOF
+%{
+#ifdef __cplusplus
+extern "C"
+#endif
+int yywrap(void);
+%}
 %%
 a { ECHO; }
 b { REJECT; }
 c { yymore (); }
 d { yyless (1); }
 e { /* IRIX 6.5 flex 2.5.4 underquotes its yyless argument.  */
-    yyless ((input () != 0)); }
+#ifdef __cplusplus
+    yyless ((yyinput () != 0));
+#else
+    yyless ((input () != 0));
+#endif
+  }
 f { unput (yytext[0]); }
 . { BEGIN INITIAL; }
 %%
@@ -6244,101 +7107,144 @@ f { unput (yytext[0]); }
 extern char *yytext;
 #endif
 int
+yywrap (void)
+{
+  return 1;
+}
+int
 main (void)
 {
-  return ! yylex () + ! yywrap ();
+  return ! yylex ();
 }
 _ACEOF
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for lex output file root" >&5
+printf %s "checking for lex output file root... " >&6; }
+if test ${ac_cv_prog_lex_root+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+ac_cv_prog_lex_root=unknown
 { { ac_try="$LEX conftest.l"
 case "(($ac_try" in
   *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
   *) ac_try_echo=$ac_try;;
 esac
 eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
+printf "%s\n" "$ac_try_echo"; } >&5
   (eval "$LEX conftest.l") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking lex output file root" >&5
-$as_echo_n "checking lex output file root... " >&6; }
-if ${ac_cv_prog_lex_root+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } &&
 if test -f lex.yy.c; then
   ac_cv_prog_lex_root=lex.yy
 elif test -f lexyy.c; then
   ac_cv_prog_lex_root=lexyy
-else
-  as_fn_error $? "cannot find output from $LEX; giving up" "$LINENO" 5
 fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_root" >&5
-$as_echo "$ac_cv_prog_lex_root" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_root" >&5
+printf "%s\n" "$ac_cv_prog_lex_root" >&6; }
+if test "$ac_cv_prog_lex_root" = unknown
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cannot find output from $LEX; giving up on $LEX" >&5
+printf "%s\n" "$as_me: WARNING: cannot find output from $LEX; giving up on $LEX" >&2;}
+   LEX=: LEXLIB=
+fi
 LEX_OUTPUT_ROOT=$ac_cv_prog_lex_root
 
-if test -z "${LEXLIB+set}"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking lex library" >&5
-$as_echo_n "checking lex library... " >&6; }
-if ${ac_cv_lib_lex+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if test ${LEXLIB+y}
+then :
+
+else $as_nop
+
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for lex library" >&5
+printf %s "checking for lex library... " >&6; }
+if test ${ac_cv_lib_lex+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+
+    ac_save_LIBS="$LIBS"
+    ac_found=false
+    for ac_cv_lib_lex in 'none needed' -lfl -ll 'not found'; do
+      case $ac_cv_lib_lex in #(
+  'none needed') :
+     ;; #(
+  'not found') :
+    break ;; #(
+  *) :
+    LIBS="$ac_cv_lib_lex $ac_save_LIBS" ;; #(
+  *) :
+     ;;
+esac
 
-    ac_save_LIBS=$LIBS
-    ac_cv_lib_lex='none needed'
-    for ac_lib in '' -lfl -ll; do
-      LIBS="$ac_lib $ac_save_LIBS"
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 `cat $LEX_OUTPUT_ROOT.c`
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_lex=$ac_lib
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_found=:
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-      test "$ac_cv_lib_lex" != 'none needed' && break
+      if $ac_found; then
+        break
+      fi
     done
-    LIBS=$ac_save_LIBS
+    LIBS="$ac_save_LIBS"
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_lex" >&5
-$as_echo "$ac_cv_lib_lex" >&6; }
-  test "$ac_cv_lib_lex" != 'none needed' && LEXLIB=$ac_cv_lib_lex
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_lex" >&5
+printf "%s\n" "$ac_cv_lib_lex" >&6; }
+  if test "$ac_cv_lib_lex" = 'not found'
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: required lex library not found; giving up on $LEX" >&5
+printf "%s\n" "$as_me: WARNING: required lex library not found; giving up on $LEX" >&2;}
+	 LEX=: LEXLIB=
+elif test "$ac_cv_lib_lex" = 'none needed'
+then :
+  LEXLIB=''
+else $as_nop
+  LEXLIB=$ac_cv_lib_lex
 fi
 
+fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether yytext is a pointer" >&5
-$as_echo_n "checking whether yytext is a pointer... " >&6; }
-if ${ac_cv_prog_lex_yytext_pointer+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+
+if test "$LEX" != :
+then :
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether yytext is a pointer" >&5
+printf %s "checking whether yytext is a pointer... " >&6; }
+if test ${ac_cv_prog_lex_yytext_pointer+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   # POSIX says lex can declare yytext either as a pointer or an array; the
 # default is implementation-dependent.  Figure out which it is, since
 # not all implementations provide the %pointer and %array declarations.
 ac_cv_prog_lex_yytext_pointer=no
-ac_save_LIBS=$LIBS
-LIBS="$LEXLIB $ac_save_LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
   #define YYTEXT_POINTER 1
 `cat $LEX_OUTPUT_ROOT.c`
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_prog_lex_yytext_pointer=yes
 fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_save_LIBS
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_yytext_pointer" >&5
-$as_echo "$ac_cv_prog_lex_yytext_pointer" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_lex_yytext_pointer" >&5
+printf "%s\n" "$ac_cv_prog_lex_yytext_pointer" >&6; }
 if test $ac_cv_prog_lex_yytext_pointer = yes; then
 
-$as_echo "#define YYTEXT_POINTER 1" >>confdefs.h
+printf "%s\n" "#define YYTEXT_POINTER 1" >>confdefs.h
+
+fi
 
 fi
 rm -f conftest.l $LEX_OUTPUT_ROOT.c
@@ -6346,32 +7252,32 @@ rm -f conftest.l $LEX_OUTPUT_ROOT.c
 fi
 if test "$LEX" != "" -a "$LEX" != ":"; then
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for yylex_destroy" >&5
-$as_echo_n "checking for yylex_destroy... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for yylex_destroy" >&5
+printf %s "checking for yylex_destroy... " >&6; }
 	if echo %% | $LEX -t 2>&1 | grep yylex_destroy >/dev/null 2>&1; then
 
-$as_echo "#define LEX_HAS_YYLEX_DESTROY 1" >>confdefs.h
+printf "%s\n" "#define LEX_HAS_YYLEX_DESTROY 1" >>confdefs.h
 
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-	else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+	else { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; };
 		LEX=":"
 	fi
 
 fi
 if test "$LEX" != "" -a "$LEX" != ":"; then
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for lex %option" >&5
-$as_echo_n "checking for lex %option... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for lex %option" >&5
+printf %s "checking for lex %option... " >&6; }
 	if cat <<EOF | $LEX -t 2>&1 | grep yy_delete_buffer >/dev/null 2>&1; then
 %option nounput
 %%
 EOF
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-	else { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+	else { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; };
 		LEX=":"
 	fi
 
@@ -6385,11 +7291,12 @@ for ac_prog in 'bison -y' byacc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_YACC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_YACC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$YACC"; then
   ac_cv_prog_YACC="$YACC" # Let the user override the test.
 else
@@ -6397,11 +7304,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_YACC="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6412,11 +7323,11 @@ fi
 fi
 YACC=$ac_cv_prog_YACC
 if test -n "$YACC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $YACC" >&5
-$as_echo "$YACC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $YACC" >&5
+printf "%s\n" "$YACC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -6431,11 +7342,12 @@ if test "$YACC" = "" -o "$YACC" = ":"; then
 fi
 # Extract the first word of "doxygen", so it can be a program name with args.
 set dummy doxygen; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_doxygen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_doxygen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$doxygen"; then
   ac_cv_prog_doxygen="$doxygen" # Let the user override the test.
 else
@@ -6443,11 +7355,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_doxygen="doxygen"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6458,22 +7374,23 @@ fi
 fi
 doxygen=$ac_cv_prog_doxygen
 if test -n "$doxygen"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $doxygen" >&5
-$as_echo "$doxygen" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $doxygen" >&5
+printf "%s\n" "$doxygen" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_STRIP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$STRIP"; then
   ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
 else
@@ -6481,11 +7398,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_STRIP="${ac_tool_prefix}strip"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6496,11 +7417,11 @@ fi
 fi
 STRIP=$ac_cv_prog_STRIP
 if test -n "$STRIP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
-$as_echo "$STRIP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf "%s\n" "$STRIP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -6509,11 +7430,12 @@ if test -z "$ac_cv_prog_STRIP"; then
   ac_ct_STRIP=$STRIP
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_STRIP"; then
   ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
 else
@@ -6521,11 +7443,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_STRIP="strip"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6536,11 +7462,11 @@ fi
 fi
 ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
 if test -n "$ac_ct_STRIP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
-$as_echo "$ac_ct_STRIP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf "%s\n" "$ac_ct_STRIP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_STRIP" = x; then
@@ -6548,8 +7474,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     STRIP=$ac_ct_STRIP
@@ -6558,55 +7484,30 @@ else
   STRIP="$ac_cv_prog_STRIP"
 fi
 
-ac_aux_dir=
-for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
-  if test -f "$ac_dir/install-sh"; then
-    ac_aux_dir=$ac_dir
-    ac_install_sh="$ac_aux_dir/install-sh -c"
-    break
-  elif test -f "$ac_dir/install.sh"; then
-    ac_aux_dir=$ac_dir
-    ac_install_sh="$ac_aux_dir/install.sh -c"
-    break
-  elif test -f "$ac_dir/shtool"; then
-    ac_aux_dir=$ac_dir
-    ac_install_sh="$ac_aux_dir/shtool install -c"
-    break
-  fi
-done
-if test -z "$ac_aux_dir"; then
-  as_fn_error $? "cannot find install-sh, install.sh, or shtool in \"$srcdir\" \"$srcdir/..\" \"$srcdir/../..\"" "$LINENO" 5
-fi
 
-# These three variables are undocumented and unsupported,
-# and are intended to be withdrawn in a future Autoconf release.
-# They can cause serious problems if a builder's source tree is in a directory
-# whose full name contains unusual characters.
-ac_config_guess="$SHELL $ac_aux_dir/config.guess"  # Please don't use this var.
-ac_config_sub="$SHELL $ac_aux_dir/config.sub"  # Please don't use this var.
-ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 
 
-# Make sure we can run config.sub.
-$SHELL "$ac_aux_dir/config.sub" sun4 >/dev/null 2>&1 ||
-  as_fn_error $? "cannot run $SHELL $ac_aux_dir/config.sub" "$LINENO" 5
+  # Make sure we can run config.sub.
+$SHELL "${ac_aux_dir}config.sub" sun4 >/dev/null 2>&1 ||
+  as_fn_error $? "cannot run $SHELL ${ac_aux_dir}config.sub" "$LINENO" 5
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
-$as_echo_n "checking build system type... " >&6; }
-if ${ac_cv_build+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking build system type" >&5
+printf %s "checking build system type... " >&6; }
+if test ${ac_cv_build+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_build_alias=$build_alias
 test "x$ac_build_alias" = x &&
-  ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`
+  ac_build_alias=`$SHELL "${ac_aux_dir}config.guess"`
 test "x$ac_build_alias" = x &&
   as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5
-ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||
-  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5
+ac_cv_build=`$SHELL "${ac_aux_dir}config.sub" $ac_build_alias` ||
+  as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $ac_build_alias failed" "$LINENO" 5
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
-$as_echo "$ac_cv_build" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5
+printf "%s\n" "$ac_cv_build" >&6; }
 case $ac_cv_build in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical build" "$LINENO" 5;;
@@ -6625,21 +7526,22 @@ IFS=$ac_save_IFS
 case $build_os in *\ *) build_os=`echo "$build_os" | sed 's/ /-/g'`;; esac
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
-$as_echo_n "checking host system type... " >&6; }
-if ${ac_cv_host+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking host system type" >&5
+printf %s "checking host system type... " >&6; }
+if test ${ac_cv_host+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test "x$host_alias" = x; then
   ac_cv_host=$ac_cv_build
 else
-  ac_cv_host=`$SHELL "$ac_aux_dir/config.sub" $host_alias` ||
-    as_fn_error $? "$SHELL $ac_aux_dir/config.sub $host_alias failed" "$LINENO" 5
+  ac_cv_host=`$SHELL "${ac_aux_dir}config.sub" $host_alias` ||
+    as_fn_error $? "$SHELL ${ac_aux_dir}config.sub $host_alias failed" "$LINENO" 5
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
-$as_echo "$ac_cv_host" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_host" >&5
+printf "%s\n" "$ac_cv_host" >&6; }
 case $ac_cv_host in
 *-*-*) ;;
 *) as_fn_error $? "invalid value of canonical host" "$LINENO" 5;;
@@ -6681,11 +7583,12 @@ fi
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ar; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_AR+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $AR in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_AR="$AR" # Let the user override the test with a path.
@@ -6695,11 +7598,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_AR="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_AR="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6711,11 +7618,11 @@ esac
 fi
 AR=$ac_cv_path_AR
 if test -n "$AR"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
-$as_echo "$AR" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+printf "%s\n" "$AR" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -6724,11 +7631,12 @@ if test -z "$ac_cv_path_AR"; then
   ac_pt_AR=$AR
   # Extract the first word of "ar", so it can be a program name with args.
 set dummy ar; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_ac_pt_AR+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_ac_pt_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $ac_pt_AR in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ac_pt_AR="$ac_pt_AR" # Let the user override the test with a path.
@@ -6738,11 +7646,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_ac_pt_AR="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_ac_pt_AR="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -6754,11 +7666,11 @@ esac
 fi
 ac_pt_AR=$ac_cv_path_ac_pt_AR
 if test -n "$ac_pt_AR"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_AR" >&5
-$as_echo "$ac_pt_AR" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_AR" >&5
+printf "%s\n" "$ac_pt_AR" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_pt_AR" = x; then
@@ -6766,8 +7678,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     AR=$ac_pt_AR
@@ -6780,10 +7692,11 @@ if test $AR = false; then
 	as_fn_error $? "Cannot find 'ar', please extend PATH to include it" "$LINENO" 5
 fi
 
+
 case `pwd` in
   *\ * | *\	*)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
-$as_echo "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
+printf "%s\n" "$as_me: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&2;} ;;
 esac
 
 
@@ -6803,6 +7716,7 @@ macro_revision='2.4.6'
 
 
 
+
 ltmain=$ac_aux_dir/ltmain.sh
 
 # Backslashify metacharacters that are still active within
@@ -6826,8 +7740,8 @@ ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
 ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
 ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5
-$as_echo_n "checking how to print strings... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to print strings" >&5
+printf %s "checking how to print strings... " >&6; }
 # Test print first, because it will be a builtin if present.
 if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \
    test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then
@@ -6853,12 +7767,12 @@ func_echo_all ()
 }
 
 case $ECHO in
-  printf*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: printf" >&5
-$as_echo "printf" >&6; } ;;
-  print*) { $as_echo "$as_me:${as_lineno-$LINENO}: result: print -r" >&5
-$as_echo "print -r" >&6; } ;;
-  *) { $as_echo "$as_me:${as_lineno-$LINENO}: result: cat" >&5
-$as_echo "cat" >&6; } ;;
+  printf*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: printf" >&5
+printf "%s\n" "printf" >&6; } ;;
+  print*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: print -r" >&5
+printf "%s\n" "print -r" >&6; } ;;
+  *) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cat" >&5
+printf "%s\n" "cat" >&6; } ;;
 esac
 
 
@@ -6874,11 +7788,12 @@ esac
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
-$as_echo_n "checking for a sed that does not truncate output... " >&6; }
-if ${ac_cv_path_SED+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+printf %s "checking for a sed that does not truncate output... " >&6; }
+if test ${ac_cv_path_SED+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
             ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
      for ac_i in 1 2 3 4 5 6 7; do
        ac_script="$ac_script$as_nl$ac_script"
@@ -6892,10 +7807,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in sed gsed; do
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in sed gsed
+   do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+      ac_path_SED="$as_dir$ac_prog$ac_exec_ext"
       as_fn_executable_p "$ac_path_SED" || continue
 # Check for GNU ac_path_SED and select it if it is found.
   # Check for GNU $ac_path_SED
@@ -6904,13 +7824,13 @@ case `"$ac_path_SED" --version 2>&1` in
   ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
 *)
   ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
+  printf %s 0123456789 >"conftest.in"
   while :
   do
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    $as_echo '' >> "conftest.nl"
+    printf "%s\n" '' >> "conftest.nl"
     "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -6938,8 +7858,8 @@ else
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
-$as_echo "$ac_cv_path_SED" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+printf "%s\n" "$ac_cv_path_SED" >&6; }
  SED="$ac_cv_path_SED"
   rm -f conftest.sed
 
@@ -6956,11 +7876,85 @@ Xsed="$SED -e 1s/^X//"
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
-$as_echo_n "checking for fgrep... " >&6; }
-if ${ac_cv_path_FGREP+:} false; then :
-  $as_echo_n "(cached) " >&6
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
+printf %s "checking for egrep... " >&6; }
+if test ${ac_cv_path_EGREP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
+   then ac_cv_path_EGREP="$GREP -E"
+   else
+     if test -z "$EGREP"; then
+  ac_path_EGREP_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in egrep
+   do
+    for ac_exec_ext in '' $ac_executable_extensions; do
+      ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP" || continue
+# Check for GNU ac_path_EGREP and select it if it is found.
+  # Check for GNU $ac_path_EGREP
+case `"$ac_path_EGREP" --version 2>&1` in
+*GNU*)
+  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+*)
+  ac_count=0
+  printf %s 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    printf "%s\n" 'EGREP' >> "conftest.nl"
+    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_EGREP="$ac_path_EGREP"
+      ac_path_EGREP_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
+  done
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+esac
+
+      $ac_path_EGREP_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_EGREP"; then
+    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  fi
 else
+  ac_cv_path_EGREP=$EGREP
+fi
+
+   fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
+printf "%s\n" "$ac_cv_path_EGREP" >&6; }
+ EGREP="$ac_cv_path_EGREP"
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for fgrep" >&5
+printf %s "checking for fgrep... " >&6; }
+if test ${ac_cv_path_FGREP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if echo 'ab*c' | $GREP -F 'ab*c' >/dev/null 2>&1
    then ac_cv_path_FGREP="$GREP -F"
    else
@@ -6971,10 +7965,15 @@ else
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in fgrep; do
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in fgrep
+   do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_FGREP="$as_dir/$ac_prog$ac_exec_ext"
+      ac_path_FGREP="$as_dir$ac_prog$ac_exec_ext"
       as_fn_executable_p "$ac_path_FGREP" || continue
 # Check for GNU ac_path_FGREP and select it if it is found.
   # Check for GNU $ac_path_FGREP
@@ -6983,13 +7982,13 @@ case `"$ac_path_FGREP" --version 2>&1` in
   ac_cv_path_FGREP="$ac_path_FGREP" ac_path_FGREP_found=:;;
 *)
   ac_count=0
-  $as_echo_n 0123456789 >"conftest.in"
+  printf %s 0123456789 >"conftest.in"
   while :
   do
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    $as_echo 'FGREP' >> "conftest.nl"
+    printf "%s\n" 'FGREP' >> "conftest.nl"
     "$ac_path_FGREP" FGREP < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
@@ -7018,8 +8017,8 @@ fi
 
    fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
-$as_echo "$ac_cv_path_FGREP" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_FGREP" >&5
+printf "%s\n" "$ac_cv_path_FGREP" >&6; }
  FGREP="$ac_cv_path_FGREP"
 
 
@@ -7044,17 +8043,18 @@ test -z "$GREP" && GREP=grep
 
 
 # Check whether --with-gnu-ld was given.
-if test "${with_gnu_ld+set}" = set; then :
+if test ${with_gnu_ld+y}
+then :
   withval=$with_gnu_ld; test no = "$withval" || with_gnu_ld=yes
-else
+else $as_nop
   with_gnu_ld=no
 fi
 
 ac_prog=ld
 if test yes = "$GCC"; then
   # Check if gcc -print-prog-name=ld gives a path.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
-$as_echo_n "checking for ld used by $CC... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ld used by $CC" >&5
+printf %s "checking for ld used by $CC... " >&6; }
   case $host in
   *-*-mingw*)
     # gcc leaves a trailing carriage return, which upsets mingw
@@ -7083,15 +8083,16 @@ $as_echo_n "checking for ld used by $CC... " >&6; }
     ;;
   esac
 elif test yes = "$with_gnu_ld"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
-$as_echo_n "checking for GNU ld... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU ld" >&5
+printf %s "checking for GNU ld... " >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
-$as_echo_n "checking for non-GNU ld... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for non-GNU ld" >&5
+printf %s "checking for non-GNU ld... " >&6; }
 fi
-if ${lt_cv_path_LD+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if test ${lt_cv_path_LD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -z "$LD"; then
   lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
   for ac_dir in $PATH; do
@@ -7120,18 +8121,19 @@ fi
 
 LD=$lt_cv_path_LD
 if test -n "$LD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-$as_echo "$LD" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
+printf "%s\n" "$LD" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 test -z "$LD" && as_fn_error $? "no acceptable ld found in \$PATH" "$LINENO" 5
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
-$as_echo_n "checking if the linker ($LD) is GNU ld... " >&6; }
-if ${lt_cv_prog_gnu_ld+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if the linker ($LD) is GNU ld" >&5
+printf %s "checking if the linker ($LD) is GNU ld... " >&6; }
+if test ${lt_cv_prog_gnu_ld+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   # I'd rather use --version here, but apparently some GNU lds only accept -v.
 case `$LD -v 2>&1 </dev/null` in
 *GNU* | *'with BFD'*)
@@ -7142,8 +8144,8 @@ case `$LD -v 2>&1 </dev/null` in
   ;;
 esac
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
-$as_echo "$lt_cv_prog_gnu_ld" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_gnu_ld" >&5
+printf "%s\n" "$lt_cv_prog_gnu_ld" >&6; }
 with_gnu_ld=$lt_cv_prog_gnu_ld
 
 
@@ -7154,11 +8156,12 @@ with_gnu_ld=$lt_cv_prog_gnu_ld
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
-$as_echo_n "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
-if ${lt_cv_path_NM+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BSD- or MS-compatible name lister (nm)" >&5
+printf %s "checking for BSD- or MS-compatible name lister (nm)... " >&6; }
+if test ${lt_cv_path_NM+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$NM"; then
   # Let the user override the test.
   lt_cv_path_NM=$NM
@@ -7208,8 +8211,8 @@ else
   : ${lt_cv_path_NM=no}
 fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
-$as_echo "$lt_cv_path_NM" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_NM" >&5
+printf "%s\n" "$lt_cv_path_NM" >&6; }
 if test no != "$lt_cv_path_NM"; then
   NM=$lt_cv_path_NM
 else
@@ -7222,11 +8225,12 @@ else
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_DUMPBIN+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_DUMPBIN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$DUMPBIN"; then
   ac_cv_prog_DUMPBIN="$DUMPBIN" # Let the user override the test.
 else
@@ -7234,11 +8238,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DUMPBIN="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7249,11 +8257,11 @@ fi
 fi
 DUMPBIN=$ac_cv_prog_DUMPBIN
 if test -n "$DUMPBIN"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
-$as_echo "$DUMPBIN" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DUMPBIN" >&5
+printf "%s\n" "$DUMPBIN" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -7266,11 +8274,12 @@ if test -z "$DUMPBIN"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_DUMPBIN+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_DUMPBIN+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_DUMPBIN"; then
   ac_cv_prog_ac_ct_DUMPBIN="$ac_ct_DUMPBIN" # Let the user override the test.
 else
@@ -7278,11 +8287,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DUMPBIN="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7293,11 +8306,11 @@ fi
 fi
 ac_ct_DUMPBIN=$ac_cv_prog_ac_ct_DUMPBIN
 if test -n "$ac_ct_DUMPBIN"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
-$as_echo "$ac_ct_DUMPBIN" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DUMPBIN" >&5
+printf "%s\n" "$ac_ct_DUMPBIN" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -7309,8 +8322,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DUMPBIN=$ac_ct_DUMPBIN
@@ -7338,11 +8351,12 @@ test -z "$NM" && NM=nm
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
-$as_echo_n "checking the name lister ($NM) interface... " >&6; }
-if ${lt_cv_nm_interface+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking the name lister ($NM) interface" >&5
+printf %s "checking the name lister ($NM) interface... " >&6; }
+if test ${lt_cv_nm_interface+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
   (eval echo "\"\$as_me:$LINENO: $ac_compile\"" >&5)
@@ -7358,26 +8372,27 @@ else
   fi
   rm -f conftest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
-$as_echo "$lt_cv_nm_interface" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_nm_interface" >&5
+printf "%s\n" "$lt_cv_nm_interface" >&6; }
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
-$as_echo_n "checking whether ln -s works... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
+printf %s "checking whether ln -s works... " >&6; }
 LN_S=$as_ln_s
 if test "$LN_S" = "ln -s"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
-$as_echo "no, using $LN_S" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no, using $LN_S" >&5
+printf "%s\n" "no, using $LN_S" >&6; }
 fi
 
 # find the maximum length of command line arguments
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
-$as_echo_n "checking the maximum length of command line arguments... " >&6; }
-if ${lt_cv_sys_max_cmd_len+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking the maximum length of command line arguments" >&5
+printf %s "checking the maximum length of command line arguments... " >&6; }
+if test ${lt_cv_sys_max_cmd_len+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
     i=0
   teststring=ABCD
 
@@ -7504,11 +8519,11 @@ else
 fi
 
 if test -n "$lt_cv_sys_max_cmd_len"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
-$as_echo "$lt_cv_sys_max_cmd_len" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sys_max_cmd_len" >&5
+printf "%s\n" "$lt_cv_sys_max_cmd_len" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: none" >&5
-$as_echo "none" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none" >&5
+printf "%s\n" "none" >&6; }
 fi
 max_cmd_len=$lt_cv_sys_max_cmd_len
 
@@ -7552,11 +8567,12 @@ esac
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5
-$as_echo_n "checking how to convert $build file names to $host format... " >&6; }
-if ${lt_cv_to_host_file_cmd+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to $host format" >&5
+printf %s "checking how to convert $build file names to $host format... " >&6; }
+if test ${lt_cv_to_host_file_cmd+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $host in
   *-*-mingw* )
     case $build in
@@ -7592,18 +8608,19 @@ esac
 fi
 
 to_host_file_cmd=$lt_cv_to_host_file_cmd
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5
-$as_echo "$lt_cv_to_host_file_cmd" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_host_file_cmd" >&5
+printf "%s\n" "$lt_cv_to_host_file_cmd" >&6; }
 
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5
-$as_echo_n "checking how to convert $build file names to toolchain format... " >&6; }
-if ${lt_cv_to_tool_file_cmd+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to convert $build file names to toolchain format" >&5
+printf %s "checking how to convert $build file names to toolchain format... " >&6; }
+if test ${lt_cv_to_tool_file_cmd+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   #assume ordinary cross tools, or native build.
 lt_cv_to_tool_file_cmd=func_convert_file_noop
 case $host in
@@ -7619,22 +8636,23 @@ esac
 fi
 
 to_tool_file_cmd=$lt_cv_to_tool_file_cmd
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5
-$as_echo "$lt_cv_to_tool_file_cmd" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_to_tool_file_cmd" >&5
+printf "%s\n" "$lt_cv_to_tool_file_cmd" >&6; }
 
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
-$as_echo_n "checking for $LD option to reload object files... " >&6; }
-if ${lt_cv_ld_reload_flag+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $LD option to reload object files" >&5
+printf %s "checking for $LD option to reload object files... " >&6; }
+if test ${lt_cv_ld_reload_flag+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_ld_reload_flag='-r'
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
-$as_echo "$lt_cv_ld_reload_flag" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_reload_flag" >&5
+printf "%s\n" "$lt_cv_ld_reload_flag" >&6; }
 reload_flag=$lt_cv_ld_reload_flag
 case $reload_flag in
 "" | " "*) ;;
@@ -7667,11 +8685,12 @@ esac
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
 set dummy ${ac_tool_prefix}objdump; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_OBJDUMP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_OBJDUMP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$OBJDUMP"; then
   ac_cv_prog_OBJDUMP="$OBJDUMP" # Let the user override the test.
 else
@@ -7679,11 +8698,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OBJDUMP="${ac_tool_prefix}objdump"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7694,11 +8717,11 @@ fi
 fi
 OBJDUMP=$ac_cv_prog_OBJDUMP
 if test -n "$OBJDUMP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
-$as_echo "$OBJDUMP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OBJDUMP" >&5
+printf "%s\n" "$OBJDUMP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -7707,11 +8730,12 @@ if test -z "$ac_cv_prog_OBJDUMP"; then
   ac_ct_OBJDUMP=$OBJDUMP
   # Extract the first word of "objdump", so it can be a program name with args.
 set dummy objdump; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_OBJDUMP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_OBJDUMP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_OBJDUMP"; then
   ac_cv_prog_ac_ct_OBJDUMP="$ac_ct_OBJDUMP" # Let the user override the test.
 else
@@ -7719,11 +8743,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OBJDUMP="objdump"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -7734,11 +8762,11 @@ fi
 fi
 ac_ct_OBJDUMP=$ac_cv_prog_ac_ct_OBJDUMP
 if test -n "$ac_ct_OBJDUMP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
-$as_echo "$ac_ct_OBJDUMP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJDUMP" >&5
+printf "%s\n" "$ac_ct_OBJDUMP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_OBJDUMP" = x; then
@@ -7746,8 +8774,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OBJDUMP=$ac_ct_OBJDUMP
@@ -7766,11 +8794,12 @@ test -z "$OBJDUMP" && OBJDUMP=objdump
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
-$as_echo_n "checking how to recognize dependent libraries... " >&6; }
-if ${lt_cv_deplibs_check_method+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to recognize dependent libraries" >&5
+printf %s "checking how to recognize dependent libraries... " >&6; }
+if test ${lt_cv_deplibs_check_method+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_file_magic_cmd='$MAGIC_CMD'
 lt_cv_file_magic_test_file=
 lt_cv_deplibs_check_method='unknown'
@@ -7966,8 +8995,8 @@ os2*)
 esac
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
-$as_echo "$lt_cv_deplibs_check_method" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_deplibs_check_method" >&5
+printf "%s\n" "$lt_cv_deplibs_check_method" >&6; }
 
 file_magic_glob=
 want_nocaseglob=no
@@ -8011,11 +9040,12 @@ test -z "$deplibs_check_method" && deplibs_check_method=unknown
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dlltool; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_DLLTOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_DLLTOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$DLLTOOL"; then
   ac_cv_prog_DLLTOOL="$DLLTOOL" # Let the user override the test.
 else
@@ -8023,11 +9053,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DLLTOOL="${ac_tool_prefix}dlltool"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8038,11 +9072,11 @@ fi
 fi
 DLLTOOL=$ac_cv_prog_DLLTOOL
 if test -n "$DLLTOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
-$as_echo "$DLLTOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DLLTOOL" >&5
+printf "%s\n" "$DLLTOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8051,11 +9085,12 @@ if test -z "$ac_cv_prog_DLLTOOL"; then
   ac_ct_DLLTOOL=$DLLTOOL
   # Extract the first word of "dlltool", so it can be a program name with args.
 set dummy dlltool; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_DLLTOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_DLLTOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_DLLTOOL"; then
   ac_cv_prog_ac_ct_DLLTOOL="$ac_ct_DLLTOOL" # Let the user override the test.
 else
@@ -8063,11 +9098,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DLLTOOL="dlltool"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8078,11 +9117,11 @@ fi
 fi
 ac_ct_DLLTOOL=$ac_cv_prog_ac_ct_DLLTOOL
 if test -n "$ac_ct_DLLTOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
-$as_echo "$ac_ct_DLLTOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DLLTOOL" >&5
+printf "%s\n" "$ac_ct_DLLTOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_DLLTOOL" = x; then
@@ -8090,8 +9129,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DLLTOOL=$ac_ct_DLLTOOL
@@ -8111,11 +9150,12 @@ test -z "$DLLTOOL" && DLLTOOL=dlltool
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5
-$as_echo_n "checking how to associate runtime and link libraries... " >&6; }
-if ${lt_cv_sharedlib_from_linklib_cmd+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to associate runtime and link libraries" >&5
+printf %s "checking how to associate runtime and link libraries... " >&6; }
+if test ${lt_cv_sharedlib_from_linklib_cmd+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_sharedlib_from_linklib_cmd='unknown'
 
 case $host_os in
@@ -8138,8 +9178,8 @@ cygwin* | mingw* | pw32* | cegcc*)
 esac
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5
-$as_echo "$lt_cv_sharedlib_from_linklib_cmd" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_sharedlib_from_linklib_cmd" >&5
+printf "%s\n" "$lt_cv_sharedlib_from_linklib_cmd" >&6; }
 sharedlib_from_linklib_cmd=$lt_cv_sharedlib_from_linklib_cmd
 test -z "$sharedlib_from_linklib_cmd" && sharedlib_from_linklib_cmd=$ECHO
 
@@ -8154,11 +9194,12 @@ if test -n "$ac_tool_prefix"; then
   do
     # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
 set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AR+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$AR"; then
   ac_cv_prog_AR="$AR" # Let the user override the test.
 else
@@ -8166,11 +9207,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AR="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8181,11 +9226,11 @@ fi
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
-$as_echo "$AR" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+printf "%s\n" "$AR" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8198,11 +9243,12 @@ if test -z "$AR"; then
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_AR+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_AR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_AR"; then
   ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
 else
@@ -8210,11 +9256,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_AR="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8225,11 +9275,11 @@ fi
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
-$as_echo "$ac_ct_AR" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+printf "%s\n" "$ac_ct_AR" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8241,8 +9291,8 @@ done
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     AR=$ac_ct_AR
@@ -8262,30 +9312,32 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5
-$as_echo_n "checking for archiver @FILE support... " >&6; }
-if ${lt_cv_ar_at_file+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for archiver @FILE support" >&5
+printf %s "checking for archiver @FILE support... " >&6; }
+if test ${lt_cv_ar_at_file+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_ar_at_file=no
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   echo conftest.$ac_objext > conftest.lst
       lt_ar_try='$AR $AR_FLAGS libconftest.a @conftest.lst >&5'
       { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
   (eval $lt_ar_try) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
       if test 0 -eq "$ac_status"; then
 	# Ensure the archiver fails upon bogus file names.
@@ -8293,7 +9345,7 @@ if ac_fn_c_try_compile "$LINENO"; then :
 	{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$lt_ar_try\""; } >&5
   (eval $lt_ar_try) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 	if test 0 -ne "$ac_status"; then
           lt_cv_ar_at_file=@
@@ -8302,11 +9354,11 @@ if ac_fn_c_try_compile "$LINENO"; then :
       rm -f conftest.* libconftest.a
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5
-$as_echo "$lt_cv_ar_at_file" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ar_at_file" >&5
+printf "%s\n" "$lt_cv_ar_at_file" >&6; }
 
 if test no = "$lt_cv_ar_at_file"; then
   archiver_list_spec=
@@ -8323,11 +9375,12 @@ fi
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
 set dummy ${ac_tool_prefix}strip; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_STRIP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$STRIP"; then
   ac_cv_prog_STRIP="$STRIP" # Let the user override the test.
 else
@@ -8335,11 +9388,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_STRIP="${ac_tool_prefix}strip"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8350,11 +9407,11 @@ fi
 fi
 STRIP=$ac_cv_prog_STRIP
 if test -n "$STRIP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
-$as_echo "$STRIP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $STRIP" >&5
+printf "%s\n" "$STRIP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8363,11 +9420,12 @@ if test -z "$ac_cv_prog_STRIP"; then
   ac_ct_STRIP=$STRIP
   # Extract the first word of "strip", so it can be a program name with args.
 set dummy strip; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_STRIP+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_STRIP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_STRIP"; then
   ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test.
 else
@@ -8375,11 +9433,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_STRIP="strip"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8390,11 +9452,11 @@ fi
 fi
 ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP
 if test -n "$ac_ct_STRIP"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
-$as_echo "$ac_ct_STRIP" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_STRIP" >&5
+printf "%s\n" "$ac_ct_STRIP" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_STRIP" = x; then
@@ -8402,8 +9464,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     STRIP=$ac_ct_STRIP
@@ -8422,11 +9484,12 @@ test -z "$STRIP" && STRIP=:
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ranlib", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ranlib; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_RANLIB+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$RANLIB"; then
   ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
 else
@@ -8434,11 +9497,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_RANLIB="${ac_tool_prefix}ranlib"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8449,11 +9516,11 @@ fi
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
-$as_echo "$RANLIB" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $RANLIB" >&5
+printf "%s\n" "$RANLIB" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8462,11 +9529,12 @@ if test -z "$ac_cv_prog_RANLIB"; then
   ac_ct_RANLIB=$RANLIB
   # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_RANLIB+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_RANLIB+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_RANLIB"; then
   ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
 else
@@ -8474,11 +9542,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_RANLIB="ranlib"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8489,11 +9561,11 @@ fi
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
-$as_echo "$ac_ct_RANLIB" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_RANLIB" >&5
+printf "%s\n" "$ac_ct_RANLIB" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_RANLIB" = x; then
@@ -8501,8 +9573,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     RANLIB=$ac_ct_RANLIB
@@ -8566,11 +9638,12 @@ for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_AWK+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_AWK+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$AWK"; then
   ac_cv_prog_AWK="$AWK" # Let the user override the test.
 else
@@ -8578,11 +9651,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_AWK="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -8593,11 +9670,11 @@ fi
 fi
 AWK=$ac_cv_prog_AWK
 if test -n "$AWK"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
-$as_echo "$AWK" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $AWK" >&5
+printf "%s\n" "$AWK" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -8633,11 +9710,12 @@ compiler=$CC
 
 
 # Check for command to grab the raw symbol name followed by C symbol from nm.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
-$as_echo_n "checking command to parse $NM output from $compiler object... " >&6; }
-if ${lt_cv_sys_global_symbol_pipe+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking command to parse $NM output from $compiler object" >&5
+printf %s "checking command to parse $NM output from $compiler object... " >&6; }
+if test ${lt_cv_sys_global_symbol_pipe+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 # These are sane defaults that work on at least a few old systems.
 # [They come from Ultrix.  What could be older than Ultrix?!! ;)]
@@ -8789,14 +9867,14 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     # Now try to grab the symbols.
     nlist=conftest.nm
     if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist\""; } >&5
   (eval $NM conftest.$ac_objext \| "$lt_cv_sys_global_symbol_pipe" \> $nlist) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s "$nlist"; then
       # Try sorting and uniquifying the output.
       if sort "$nlist" | uniq > "$nlist"T; then
@@ -8865,7 +9943,7 @@ _LT_EOF
 	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s conftest$ac_exeext; then
 	    pipe_works=yes
 	  fi
@@ -8900,11 +9978,11 @@ if test -z "$lt_cv_sys_global_symbol_pipe"; then
   lt_cv_sys_global_symbol_to_cdecl=
 fi
 if test -z "$lt_cv_sys_global_symbol_pipe$lt_cv_sys_global_symbol_to_cdecl"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
-$as_echo "ok" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ok" >&5
+printf "%s\n" "ok" >&6; }
 fi
 
 # Response file support.
@@ -8950,13 +10028,14 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5
-$as_echo_n "checking for sysroot... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for sysroot" >&5
+printf %s "checking for sysroot... " >&6; }
 
 # Check whether --with-sysroot was given.
-if test "${with_sysroot+set}" = set; then :
+if test ${with_sysroot+y}
+then :
   withval=$with_sysroot;
-else
+else $as_nop
   with_sysroot=no
 fi
 
@@ -8974,24 +10053,25 @@ case $with_sysroot in #(
  no|'')
    ;; #(
  *)
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5
-$as_echo "$with_sysroot" >&6; }
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_sysroot" >&5
+printf "%s\n" "$with_sysroot" >&6; }
    as_fn_error $? "The sysroot must be an absolute path." "$LINENO" 5
    ;;
 esac
 
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5
-$as_echo "${lt_sysroot:-no}" >&6; }
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: ${lt_sysroot:-no}" >&5
+printf "%s\n" "${lt_sysroot:-no}" >&6; }
 
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5
-$as_echo_n "checking for a working dd... " >&6; }
-if ${ac_cv_path_lt_DD+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for a working dd" >&5
+printf %s "checking for a working dd... " >&6; }
+if test ${ac_cv_path_lt_DD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   printf 0123456789abcdef0123456789abcdef >conftest.i
 cat conftest.i conftest.i >conftest2.i
 : ${lt_DD:=$DD}
@@ -9002,10 +10082,15 @@ if test -z "$lt_DD"; then
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_prog in dd; do
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_prog in dd
+   do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_lt_DD="$as_dir/$ac_prog$ac_exec_ext"
+      ac_path_lt_DD="$as_dir$ac_prog$ac_exec_ext"
       as_fn_executable_p "$ac_path_lt_DD" || continue
 if "$ac_path_lt_DD" bs=32 count=1 <conftest2.i >conftest.out 2>/dev/null; then
   cmp -s conftest.i conftest.out \
@@ -9025,15 +10110,16 @@ fi
 
 rm -f conftest.i conftest2.i conftest.out
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5
-$as_echo "$ac_cv_path_lt_DD" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_lt_DD" >&5
+printf "%s\n" "$ac_cv_path_lt_DD" >&6; }
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5
-$as_echo_n "checking how to truncate binary pipes... " >&6; }
-if ${lt_cv_truncate_bin+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to truncate binary pipes" >&5
+printf %s "checking how to truncate binary pipes... " >&6; }
+if test ${lt_cv_truncate_bin+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   printf 0123456789abcdef0123456789abcdef >conftest.i
 cat conftest.i conftest.i >conftest2.i
 lt_cv_truncate_bin=
@@ -9044,8 +10130,8 @@ fi
 rm -f conftest.i conftest2.i conftest.out
 test -z "$lt_cv_truncate_bin" && lt_cv_truncate_bin="$SED -e 4q"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5
-$as_echo "$lt_cv_truncate_bin" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_truncate_bin" >&5
+printf "%s\n" "$lt_cv_truncate_bin" >&6; }
 
 
 
@@ -9068,7 +10154,8 @@ func_cc_basename ()
 }
 
 # Check whether --enable-libtool-lock was given.
-if test "${enable_libtool_lock+set}" = set; then :
+if test ${enable_libtool_lock+y}
+then :
   enableval=$enable_libtool_lock;
 fi
 
@@ -9084,7 +10171,7 @@ ia64-*-hpux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `/usr/bin/file conftest.$ac_objext` in
       *ELF-32*)
@@ -9104,7 +10191,7 @@ ia64-*-hpux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     if test yes = "$lt_cv_prog_gnu_ld"; then
       case `/usr/bin/file conftest.$ac_objext` in
@@ -9142,7 +10229,7 @@ mips64*-*linux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     emul=elf
     case `/usr/bin/file conftest.$ac_objext` in
@@ -9183,7 +10270,7 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `/usr/bin/file conftest.o` in
       *32-bit*)
@@ -9246,11 +10333,12 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*)
   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
   SAVE_CFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -belf"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
-$as_echo_n "checking whether the C compiler needs -belf... " >&6; }
-if ${lt_cv_cc_needs_belf+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler needs -belf" >&5
+printf %s "checking whether the C compiler needs -belf... " >&6; }
+if test ${lt_cv_cc_needs_belf+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -9261,19 +10349,20 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   lt_cv_cc_needs_belf=yes
-else
+else $as_nop
   lt_cv_cc_needs_belf=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
      ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
@@ -9282,8 +10371,8 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
-$as_echo "$lt_cv_cc_needs_belf" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_cc_needs_belf" >&5
+printf "%s\n" "$lt_cv_cc_needs_belf" >&6; }
   if test yes != "$lt_cv_cc_needs_belf"; then
     # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
     CFLAGS=$SAVE_CFLAGS
@@ -9296,7 +10385,7 @@ $as_echo "$lt_cv_cc_needs_belf" >&6; }
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
     case `/usr/bin/file conftest.o` in
     *64-bit*)
@@ -9333,11 +10422,12 @@ need_locks=$enable_libtool_lock
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}mt", so it can be a program name with args.
 set dummy ${ac_tool_prefix}mt; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_MANIFEST_TOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_MANIFEST_TOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$MANIFEST_TOOL"; then
   ac_cv_prog_MANIFEST_TOOL="$MANIFEST_TOOL" # Let the user override the test.
 else
@@ -9345,11 +10435,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_MANIFEST_TOOL="${ac_tool_prefix}mt"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9360,11 +10454,11 @@ fi
 fi
 MANIFEST_TOOL=$ac_cv_prog_MANIFEST_TOOL
 if test -n "$MANIFEST_TOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5
-$as_echo "$MANIFEST_TOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MANIFEST_TOOL" >&5
+printf "%s\n" "$MANIFEST_TOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9373,11 +10467,12 @@ if test -z "$ac_cv_prog_MANIFEST_TOOL"; then
   ac_ct_MANIFEST_TOOL=$MANIFEST_TOOL
   # Extract the first word of "mt", so it can be a program name with args.
 set dummy mt; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_MANIFEST_TOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_MANIFEST_TOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_MANIFEST_TOOL"; then
   ac_cv_prog_ac_ct_MANIFEST_TOOL="$ac_ct_MANIFEST_TOOL" # Let the user override the test.
 else
@@ -9385,11 +10480,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_MANIFEST_TOOL="mt"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9400,11 +10499,11 @@ fi
 fi
 ac_ct_MANIFEST_TOOL=$ac_cv_prog_ac_ct_MANIFEST_TOOL
 if test -n "$ac_ct_MANIFEST_TOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5
-$as_echo "$ac_ct_MANIFEST_TOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_MANIFEST_TOOL" >&5
+printf "%s\n" "$ac_ct_MANIFEST_TOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_MANIFEST_TOOL" = x; then
@@ -9412,8 +10511,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     MANIFEST_TOOL=$ac_ct_MANIFEST_TOOL
@@ -9423,11 +10522,12 @@ else
 fi
 
 test -z "$MANIFEST_TOOL" && MANIFEST_TOOL=mt
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5
-$as_echo_n "checking if $MANIFEST_TOOL is a manifest tool... " >&6; }
-if ${lt_cv_path_mainfest_tool+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $MANIFEST_TOOL is a manifest tool" >&5
+printf %s "checking if $MANIFEST_TOOL is a manifest tool... " >&6; }
+if test ${lt_cv_path_mainfest_tool+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_path_mainfest_tool=no
   echo "$as_me:$LINENO: $MANIFEST_TOOL '-?'" >&5
   $MANIFEST_TOOL '-?' 2>conftest.err > conftest.out
@@ -9437,8 +10537,8 @@ else
   fi
   rm -f conftest*
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5
-$as_echo "$lt_cv_path_mainfest_tool" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_path_mainfest_tool" >&5
+printf "%s\n" "$lt_cv_path_mainfest_tool" >&6; }
 if test yes != "$lt_cv_path_mainfest_tool"; then
   MANIFEST_TOOL=:
 fi
@@ -9453,11 +10553,12 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}dsymutil", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dsymutil; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_DSYMUTIL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_DSYMUTIL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$DSYMUTIL"; then
   ac_cv_prog_DSYMUTIL="$DSYMUTIL" # Let the user override the test.
 else
@@ -9465,11 +10566,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_DSYMUTIL="${ac_tool_prefix}dsymutil"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9480,11 +10585,11 @@ fi
 fi
 DSYMUTIL=$ac_cv_prog_DSYMUTIL
 if test -n "$DSYMUTIL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
-$as_echo "$DSYMUTIL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $DSYMUTIL" >&5
+printf "%s\n" "$DSYMUTIL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9493,11 +10598,12 @@ if test -z "$ac_cv_prog_DSYMUTIL"; then
   ac_ct_DSYMUTIL=$DSYMUTIL
   # Extract the first word of "dsymutil", so it can be a program name with args.
 set dummy dsymutil; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_DSYMUTIL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_DSYMUTIL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_DSYMUTIL"; then
   ac_cv_prog_ac_ct_DSYMUTIL="$ac_ct_DSYMUTIL" # Let the user override the test.
 else
@@ -9505,11 +10611,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_DSYMUTIL="dsymutil"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9520,11 +10630,11 @@ fi
 fi
 ac_ct_DSYMUTIL=$ac_cv_prog_ac_ct_DSYMUTIL
 if test -n "$ac_ct_DSYMUTIL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
-$as_echo "$ac_ct_DSYMUTIL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_DSYMUTIL" >&5
+printf "%s\n" "$ac_ct_DSYMUTIL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_DSYMUTIL" = x; then
@@ -9532,8 +10642,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     DSYMUTIL=$ac_ct_DSYMUTIL
@@ -9545,11 +10655,12 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}nmedit", so it can be a program name with args.
 set dummy ${ac_tool_prefix}nmedit; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_NMEDIT+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_NMEDIT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$NMEDIT"; then
   ac_cv_prog_NMEDIT="$NMEDIT" # Let the user override the test.
 else
@@ -9557,11 +10668,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_NMEDIT="${ac_tool_prefix}nmedit"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9572,11 +10687,11 @@ fi
 fi
 NMEDIT=$ac_cv_prog_NMEDIT
 if test -n "$NMEDIT"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
-$as_echo "$NMEDIT" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $NMEDIT" >&5
+printf "%s\n" "$NMEDIT" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9585,11 +10700,12 @@ if test -z "$ac_cv_prog_NMEDIT"; then
   ac_ct_NMEDIT=$NMEDIT
   # Extract the first word of "nmedit", so it can be a program name with args.
 set dummy nmedit; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_NMEDIT+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_NMEDIT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_NMEDIT"; then
   ac_cv_prog_ac_ct_NMEDIT="$ac_ct_NMEDIT" # Let the user override the test.
 else
@@ -9597,11 +10713,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_NMEDIT="nmedit"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9612,11 +10732,11 @@ fi
 fi
 ac_ct_NMEDIT=$ac_cv_prog_ac_ct_NMEDIT
 if test -n "$ac_ct_NMEDIT"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
-$as_echo "$ac_ct_NMEDIT" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_NMEDIT" >&5
+printf "%s\n" "$ac_ct_NMEDIT" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_NMEDIT" = x; then
@@ -9624,8 +10744,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     NMEDIT=$ac_ct_NMEDIT
@@ -9637,11 +10757,12 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}lipo", so it can be a program name with args.
 set dummy ${ac_tool_prefix}lipo; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LIPO+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_LIPO+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$LIPO"; then
   ac_cv_prog_LIPO="$LIPO" # Let the user override the test.
 else
@@ -9649,11 +10770,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_LIPO="${ac_tool_prefix}lipo"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9664,11 +10789,11 @@ fi
 fi
 LIPO=$ac_cv_prog_LIPO
 if test -n "$LIPO"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
-$as_echo "$LIPO" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIPO" >&5
+printf "%s\n" "$LIPO" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9677,11 +10802,12 @@ if test -z "$ac_cv_prog_LIPO"; then
   ac_ct_LIPO=$LIPO
   # Extract the first word of "lipo", so it can be a program name with args.
 set dummy lipo; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_LIPO+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_LIPO+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_LIPO"; then
   ac_cv_prog_ac_ct_LIPO="$ac_ct_LIPO" # Let the user override the test.
 else
@@ -9689,11 +10815,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_LIPO="lipo"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9704,11 +10834,11 @@ fi
 fi
 ac_ct_LIPO=$ac_cv_prog_ac_ct_LIPO
 if test -n "$ac_ct_LIPO"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
-$as_echo "$ac_ct_LIPO" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_LIPO" >&5
+printf "%s\n" "$ac_ct_LIPO" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_LIPO" = x; then
@@ -9716,8 +10846,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     LIPO=$ac_ct_LIPO
@@ -9729,11 +10859,12 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_OTOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_OTOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$OTOOL"; then
   ac_cv_prog_OTOOL="$OTOOL" # Let the user override the test.
 else
@@ -9741,11 +10872,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OTOOL="${ac_tool_prefix}otool"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9756,11 +10891,11 @@ fi
 fi
 OTOOL=$ac_cv_prog_OTOOL
 if test -n "$OTOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
-$as_echo "$OTOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OTOOL" >&5
+printf "%s\n" "$OTOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9769,11 +10904,12 @@ if test -z "$ac_cv_prog_OTOOL"; then
   ac_ct_OTOOL=$OTOOL
   # Extract the first word of "otool", so it can be a program name with args.
 set dummy otool; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_OTOOL+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_OTOOL+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_OTOOL"; then
   ac_cv_prog_ac_ct_OTOOL="$ac_ct_OTOOL" # Let the user override the test.
 else
@@ -9781,11 +10917,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OTOOL="otool"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9796,11 +10936,11 @@ fi
 fi
 ac_ct_OTOOL=$ac_cv_prog_ac_ct_OTOOL
 if test -n "$ac_ct_OTOOL"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
-$as_echo "$ac_ct_OTOOL" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL" >&5
+printf "%s\n" "$ac_ct_OTOOL" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_OTOOL" = x; then
@@ -9808,8 +10948,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL=$ac_ct_OTOOL
@@ -9821,11 +10961,12 @@ fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}otool64", so it can be a program name with args.
 set dummy ${ac_tool_prefix}otool64; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_OTOOL64+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_OTOOL64+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$OTOOL64"; then
   ac_cv_prog_OTOOL64="$OTOOL64" # Let the user override the test.
 else
@@ -9833,11 +10974,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_OTOOL64="${ac_tool_prefix}otool64"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9848,11 +10993,11 @@ fi
 fi
 OTOOL64=$ac_cv_prog_OTOOL64
 if test -n "$OTOOL64"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
-$as_echo "$OTOOL64" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $OTOOL64" >&5
+printf "%s\n" "$OTOOL64" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -9861,11 +11006,12 @@ if test -z "$ac_cv_prog_OTOOL64"; then
   ac_ct_OTOOL64=$OTOOL64
   # Extract the first word of "otool64", so it can be a program name with args.
 set dummy otool64; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_OTOOL64+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_OTOOL64+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_OTOOL64"; then
   ac_cv_prog_ac_ct_OTOOL64="$ac_ct_OTOOL64" # Let the user override the test.
 else
@@ -9873,11 +11019,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_OTOOL64="otool64"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -9888,11 +11038,11 @@ fi
 fi
 ac_ct_OTOOL64=$ac_cv_prog_ac_ct_OTOOL64
 if test -n "$ac_ct_OTOOL64"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
-$as_echo "$ac_ct_OTOOL64" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OTOOL64" >&5
+printf "%s\n" "$ac_ct_OTOOL64" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_OTOOL64" = x; then
@@ -9900,8 +11050,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     OTOOL64=$ac_ct_OTOOL64
@@ -9936,11 +11086,12 @@ fi
 
 
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
-$as_echo_n "checking for -single_module linker flag... " >&6; }
-if ${lt_cv_apple_cc_single_mod+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -single_module linker flag" >&5
+printf %s "checking for -single_module linker flag... " >&6; }
+if test ${lt_cv_apple_cc_single_mod+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_apple_cc_single_mod=no
       if test -z "$LT_MULTI_MODULE"; then
 	# By default we will add the -single_module flag. You can override
@@ -9969,14 +11120,15 @@ else
 	rm -f conftest.*
       fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
-$as_echo "$lt_cv_apple_cc_single_mod" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_apple_cc_single_mod" >&5
+printf "%s\n" "$lt_cv_apple_cc_single_mod" >&6; }
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
-$as_echo_n "checking for -exported_symbols_list linker flag... " >&6; }
-if ${lt_cv_ld_exported_symbols_list+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -exported_symbols_list linker flag" >&5
+printf %s "checking for -exported_symbols_list linker flag... " >&6; }
+if test ${lt_cv_ld_exported_symbols_list+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_ld_exported_symbols_list=no
       save_LDFLAGS=$LDFLAGS
       echo "_main" > conftest.sym
@@ -9985,31 +11137,33 @@ else
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   lt_cv_ld_exported_symbols_list=yes
-else
+else $as_nop
   lt_cv_ld_exported_symbols_list=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 	LDFLAGS=$save_LDFLAGS
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
-$as_echo "$lt_cv_ld_exported_symbols_list" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_exported_symbols_list" >&5
+printf "%s\n" "$lt_cv_ld_exported_symbols_list" >&6; }
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5
-$as_echo_n "checking for -force_load linker flag... " >&6; }
-if ${lt_cv_ld_force_load+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -force_load linker flag" >&5
+printf %s "checking for -force_load linker flag... " >&6; }
+if test ${lt_cv_ld_force_load+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_ld_force_load=no
       cat > conftest.c << _LT_EOF
 int forced_loaded() { return 2;}
@@ -10037,8 +11191,8 @@ _LT_EOF
         rm -rf conftest.dSYM
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5
-$as_echo "$lt_cv_ld_force_load" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_ld_force_load" >&5
+printf "%s\n" "$lt_cv_ld_force_load" >&6; }
     case $host_os in
     rhapsody* | darwin1.[012])
       _lt_dar_allow_undefined='$wl-undefined ${wl}suppress' ;;
@@ -10109,19 +11263,14 @@ func_munge_path_list ()
     esac
 }
 
-for ac_header in dlfcn.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_dlfcn_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_DLFCN_H 1
-_ACEOF
+if test "x$ac_cv_header_dlfcn_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_DLFCN_H 1" >>confdefs.h
 
 fi
 
-done
-
 
 
 
@@ -10139,7 +11288,8 @@ done
 
 
             # Check whether --enable-shared was given.
-if test "${enable_shared+set}" = set; then :
+if test ${enable_shared+y}
+then :
   enableval=$enable_shared; p=${PACKAGE-default}
     case $enableval in
     yes) enable_shared=yes ;;
@@ -10157,7 +11307,7 @@ if test "${enable_shared+set}" = set; then :
       IFS=$lt_save_ifs
       ;;
     esac
-else
+else $as_nop
   enable_shared=yes
 fi
 
@@ -10170,7 +11320,8 @@ fi
 
 
   # Check whether --enable-static was given.
-if test "${enable_static+set}" = set; then :
+if test ${enable_static+y}
+then :
   enableval=$enable_static; p=${PACKAGE-default}
     case $enableval in
     yes) enable_static=yes ;;
@@ -10188,7 +11339,7 @@ if test "${enable_static+set}" = set; then :
       IFS=$lt_save_ifs
       ;;
     esac
-else
+else $as_nop
   enable_static=yes
 fi
 
@@ -10202,7 +11353,8 @@ fi
 
 
 # Check whether --with-pic was given.
-if test "${with_pic+set}" = set; then :
+if test ${with_pic+y}
+then :
   withval=$with_pic; lt_p=${PACKAGE-default}
     case $withval in
     yes|no) pic_mode=$withval ;;
@@ -10219,7 +11371,7 @@ if test "${with_pic+set}" = set; then :
       IFS=$lt_save_ifs
       ;;
     esac
-else
+else $as_nop
   pic_mode=default
 fi
 
@@ -10231,7 +11383,8 @@ fi
 
 
   # Check whether --enable-fast-install was given.
-if test "${enable_fast_install+set}" = set; then :
+if test ${enable_fast_install+y}
+then :
   enableval=$enable_fast_install; p=${PACKAGE-default}
     case $enableval in
     yes) enable_fast_install=yes ;;
@@ -10249,7 +11402,7 @@ if test "${enable_fast_install+set}" = set; then :
       IFS=$lt_save_ifs
       ;;
     esac
-else
+else $as_nop
   enable_fast_install=yes
 fi
 
@@ -10263,11 +11416,12 @@ fi
   shared_archive_member_spec=
 case $host,$enable_shared in
 power*-*-aix[5-9]*,yes)
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5
-$as_echo_n "checking which variant of shared library versioning to provide... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking which variant of shared library versioning to provide" >&5
+printf %s "checking which variant of shared library versioning to provide... " >&6; }
 
 # Check whether --with-aix-soname was given.
-if test "${with_aix_soname+set}" = set; then :
+if test ${with_aix_soname+y}
+then :
   withval=$with_aix_soname; case $withval in
     aix|svr4|both)
       ;;
@@ -10276,18 +11430,19 @@ if test "${with_aix_soname+set}" = set; then :
       ;;
     esac
     lt_cv_with_aix_soname=$with_aix_soname
-else
-  if ${lt_cv_with_aix_soname+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+else $as_nop
+  if test ${lt_cv_with_aix_soname+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_with_aix_soname=aix
 fi
 
     with_aix_soname=$lt_cv_with_aix_soname
 fi
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5
-$as_echo "$with_aix_soname" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_aix_soname" >&5
+printf "%s\n" "$with_aix_soname" >&6; }
   if test aix != "$with_aix_soname"; then
     # For the AIX way of multilib, we name the shared archive member
     # based on the bitwidth used, traditionally 'shr.o' or 'shr_64.o',
@@ -10369,11 +11524,12 @@ if test -n "${ZSH_VERSION+set}"; then
    setopt NO_GLOB_SUBST
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
-$as_echo_n "checking for objdir... " >&6; }
-if ${lt_cv_objdir+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for objdir" >&5
+printf %s "checking for objdir... " >&6; }
+if test ${lt_cv_objdir+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   rm -f .libs 2>/dev/null
 mkdir .libs 2>/dev/null
 if test -d .libs; then
@@ -10384,17 +11540,15 @@ else
 fi
 rmdir .libs 2>/dev/null
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
-$as_echo "$lt_cv_objdir" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_objdir" >&5
+printf "%s\n" "$lt_cv_objdir" >&6; }
 objdir=$lt_cv_objdir
 
 
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define LT_OBJDIR "$lt_cv_objdir/"
-_ACEOF
+printf "%s\n" "#define LT_OBJDIR \"$lt_cv_objdir/\"" >>confdefs.h
 
 
 
@@ -10440,11 +11594,12 @@ test -z "$MAGIC_CMD" && MAGIC_CMD=file
 case $deplibs_check_method in
 file_magic*)
   if test "$file_magic_cmd" = '$MAGIC_CMD'; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
-$as_echo_n "checking for ${ac_tool_prefix}file... " >&6; }
-if ${lt_cv_path_MAGIC_CMD+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ${ac_tool_prefix}file" >&5
+printf %s "checking for ${ac_tool_prefix}file... " >&6; }
+if test ${lt_cv_path_MAGIC_CMD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $MAGIC_CMD in
 [\\/*] |  ?:[\\/]*)
   lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
@@ -10493,11 +11648,11 @@ fi
 
 MAGIC_CMD=$lt_cv_path_MAGIC_CMD
 if test -n "$MAGIC_CMD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
-$as_echo "$MAGIC_CMD" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+printf "%s\n" "$MAGIC_CMD" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -10506,11 +11661,12 @@ fi
 
 if test -z "$lt_cv_path_MAGIC_CMD"; then
   if test -n "$ac_tool_prefix"; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for file" >&5
-$as_echo_n "checking for file... " >&6; }
-if ${lt_cv_path_MAGIC_CMD+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for file" >&5
+printf %s "checking for file... " >&6; }
+if test ${lt_cv_path_MAGIC_CMD+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $MAGIC_CMD in
 [\\/*] |  ?:[\\/]*)
   lt_cv_path_MAGIC_CMD=$MAGIC_CMD # Let the user override the test with a path.
@@ -10559,11 +11715,11 @@ fi
 
 MAGIC_CMD=$lt_cv_path_MAGIC_CMD
 if test -n "$MAGIC_CMD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
-$as_echo "$MAGIC_CMD" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $MAGIC_CMD" >&5
+printf "%s\n" "$MAGIC_CMD" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -10644,11 +11800,12 @@ if test yes = "$GCC"; then
     lt_prog_compiler_no_builtin_flag=' -fno-builtin' ;;
   esac
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
-$as_echo_n "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
-if ${lt_cv_prog_compiler_rtti_exceptions+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -fno-rtti -fno-exceptions" >&5
+printf %s "checking if $compiler supports -fno-rtti -fno-exceptions... " >&6; }
+if test ${lt_cv_prog_compiler_rtti_exceptions+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_rtti_exceptions=no
    ac_outfile=conftest.$ac_objext
    echo "$lt_simple_compile_test_code" > conftest.$ac_ext
@@ -10679,8 +11836,8 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
-$as_echo "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_rtti_exceptions" >&5
+printf "%s\n" "$lt_cv_prog_compiler_rtti_exceptions" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_rtti_exceptions"; then
     lt_prog_compiler_no_builtin_flag="$lt_prog_compiler_no_builtin_flag -fno-rtti -fno-exceptions"
@@ -11037,26 +12194,28 @@ case $host_os in
     ;;
 esac
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
-$as_echo_n "checking for $compiler option to produce PIC... " >&6; }
-if ${lt_cv_prog_compiler_pic+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $compiler option to produce PIC" >&5
+printf %s "checking for $compiler option to produce PIC... " >&6; }
+if test ${lt_cv_prog_compiler_pic+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_pic=$lt_prog_compiler_pic
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
-$as_echo "$lt_cv_prog_compiler_pic" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic" >&5
+printf "%s\n" "$lt_cv_prog_compiler_pic" >&6; }
 lt_prog_compiler_pic=$lt_cv_prog_compiler_pic
 
 #
 # Check to make sure the PIC flag actually works.
 #
 if test -n "$lt_prog_compiler_pic"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
-$as_echo_n "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
-if ${lt_cv_prog_compiler_pic_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler PIC flag $lt_prog_compiler_pic works" >&5
+printf %s "checking if $compiler PIC flag $lt_prog_compiler_pic works... " >&6; }
+if test ${lt_cv_prog_compiler_pic_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_pic_works=no
    ac_outfile=conftest.$ac_objext
    echo "$lt_simple_compile_test_code" > conftest.$ac_ext
@@ -11087,8 +12246,8 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
-$as_echo "$lt_cv_prog_compiler_pic_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_pic_works" >&5
+printf "%s\n" "$lt_cv_prog_compiler_pic_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_pic_works"; then
     case $lt_prog_compiler_pic in
@@ -11116,11 +12275,12 @@ fi
 # Check to make sure the static flag actually works.
 #
 wl=$lt_prog_compiler_wl eval lt_tmp_static_flag=\"$lt_prog_compiler_static\"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
-$as_echo_n "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
-if ${lt_cv_prog_compiler_static_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler static flag $lt_tmp_static_flag works" >&5
+printf %s "checking if $compiler static flag $lt_tmp_static_flag works... " >&6; }
+if test ${lt_cv_prog_compiler_static_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_static_works=no
    save_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS $lt_tmp_static_flag"
@@ -11144,8 +12304,8 @@ else
    LDFLAGS=$save_LDFLAGS
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
-$as_echo "$lt_cv_prog_compiler_static_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_static_works" >&5
+printf "%s\n" "$lt_cv_prog_compiler_static_works" >&6; }
 
 if test yes = "$lt_cv_prog_compiler_static_works"; then
     :
@@ -11159,11 +12319,12 @@ fi
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
-$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
-if ${lt_cv_prog_compiler_c_o+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+printf %s "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if test ${lt_cv_prog_compiler_c_o+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_c_o=no
    $RM -r conftest 2>/dev/null
    mkdir conftest
@@ -11206,19 +12367,20 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
-$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+printf "%s\n" "$lt_cv_prog_compiler_c_o" >&6; }
 
 
 
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
-$as_echo_n "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
-if ${lt_cv_prog_compiler_c_o+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $compiler supports -c -o file.$ac_objext" >&5
+printf %s "checking if $compiler supports -c -o file.$ac_objext... " >&6; }
+if test ${lt_cv_prog_compiler_c_o+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler_c_o=no
    $RM -r conftest 2>/dev/null
    mkdir conftest
@@ -11261,8 +12423,8 @@ else
    $RM conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
-$as_echo "$lt_cv_prog_compiler_c_o" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler_c_o" >&5
+printf "%s\n" "$lt_cv_prog_compiler_c_o" >&6; }
 
 
 
@@ -11270,19 +12432,19 @@ $as_echo "$lt_cv_prog_compiler_c_o" >&6; }
 hard_links=nottested
 if test no = "$lt_cv_prog_compiler_c_o" && test no != "$need_locks"; then
   # do not overwrite the value of need_locks provided by the user
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
-$as_echo_n "checking if we can lock with hard links... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we can lock with hard links" >&5
+printf %s "checking if we can lock with hard links... " >&6; }
   hard_links=yes
   $RM conftest*
   ln conftest.a conftest.b 2>/dev/null && hard_links=no
   touch conftest.a
   ln conftest.a conftest.b 2>&5 || hard_links=no
   ln conftest.a conftest.b 2>/dev/null && hard_links=no
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
-$as_echo "$hard_links" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $hard_links" >&5
+printf "%s\n" "$hard_links" >&6; }
   if test no = "$hard_links"; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
-$as_echo "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&5
+printf "%s\n" "$as_me: WARNING: '$CC' does not support '-c -o', so 'make -j' may be unsafe" >&2;}
     need_locks=warn
   fi
 else
@@ -11294,8 +12456,8 @@ fi
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
-$as_echo_n "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the $compiler linker ($LD) supports shared libraries" >&5
+printf %s "checking whether the $compiler linker ($LD) supports shared libraries... " >&6; }
 
   runpath_var=
   allow_undefined_flag=
@@ -11850,21 +13012,23 @@ _LT_EOF
         if test set = "${lt_cv_aix_libpath+set}"; then
   aix_libpath=$lt_cv_aix_libpath
 else
-  if ${lt_cv_aix_libpath_+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  if test ${lt_cv_aix_libpath_+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
   lt_aix_libpath_sed='
       /Import File Strings/,/^$/ {
@@ -11879,7 +13043,7 @@ if ac_fn_c_try_link "$LINENO"; then :
     lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
   fi
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
   if test -z "$lt_cv_aix_libpath_"; then
     lt_cv_aix_libpath_=/usr/lib:/lib
@@ -11903,21 +13067,23 @@ fi
 	 if test set = "${lt_cv_aix_libpath+set}"; then
   aix_libpath=$lt_cv_aix_libpath
 else
-  if ${lt_cv_aix_libpath_+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  if test ${lt_cv_aix_libpath_+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
   lt_aix_libpath_sed='
       /Import File Strings/,/^$/ {
@@ -11932,7 +13098,7 @@ if ac_fn_c_try_link "$LINENO"; then :
     lt_cv_aix_libpath_=`dump -HX64 conftest$ac_exeext 2>/dev/null | $SED -n -e "$lt_aix_libpath_sed"`
   fi
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
   if test -z "$lt_cv_aix_libpath_"; then
     lt_cv_aix_libpath_=/usr/lib:/lib
@@ -12183,11 +13349,12 @@ fi
 
 	  # Older versions of the 11.00 compiler do not understand -b yet
 	  # (HP92453-01 A.11.01.20 doesn't, HP92453-01 B.11.X.35175-35176.GP does)
-	  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5
-$as_echo_n "checking if $CC understands -b... " >&6; }
-if ${lt_cv_prog_compiler__b+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $CC understands -b" >&5
+printf %s "checking if $CC understands -b... " >&6; }
+if test ${lt_cv_prog_compiler__b+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_prog_compiler__b=no
    save_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -b"
@@ -12211,8 +13378,8 @@ else
    LDFLAGS=$save_LDFLAGS
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5
-$as_echo "$lt_cv_prog_compiler__b" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_prog_compiler__b" >&5
+printf "%s\n" "$lt_cv_prog_compiler__b" >&6; }
 
 if test yes = "$lt_cv_prog_compiler__b"; then
     archive_cmds='$CC -b $wl+h $wl$soname $wl+b $wl$install_libdir -o $lib $libobjs $deplibs $compiler_flags'
@@ -12252,28 +13419,30 @@ fi
 	# work, assume that -exports_file does not work either and
 	# implicitly export all symbols.
 	# This should be the same for all languages, so no per-tag cache variable.
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5
-$as_echo_n "checking whether the $host_os linker accepts -exported_symbol... " >&6; }
-if ${lt_cv_irix_exported_symbol+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the $host_os linker accepts -exported_symbol" >&5
+printf %s "checking whether the $host_os linker accepts -exported_symbol... " >&6; }
+if test ${lt_cv_irix_exported_symbol+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   save_LDFLAGS=$LDFLAGS
 	   LDFLAGS="$LDFLAGS -shared $wl-exported_symbol ${wl}foo $wl-update_registry $wl/dev/null"
 	   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 int foo (void) { return 0; }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   lt_cv_irix_exported_symbol=yes
-else
+else $as_nop
   lt_cv_irix_exported_symbol=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
            LDFLAGS=$save_LDFLAGS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5
-$as_echo "$lt_cv_irix_exported_symbol" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_irix_exported_symbol" >&5
+printf "%s\n" "$lt_cv_irix_exported_symbol" >&6; }
 	if test yes = "$lt_cv_irix_exported_symbol"; then
           archive_expsym_cmds='$CC -shared $pic_flag $libobjs $deplibs $compiler_flags $wl-soname $wl$soname `test -n "$verstring" && func_echo_all "$wl-set_version $wl$verstring"` $wl-update_registry $wl$output_objdir/so_locations $wl-exports_file $wl$export_symbols -o $lib'
 	fi
@@ -12553,8 +13722,8 @@ $as_echo "$lt_cv_irix_exported_symbol" >&6; }
     fi
   fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
-$as_echo "$ld_shlibs" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ld_shlibs" >&5
+printf "%s\n" "$ld_shlibs" >&6; }
 test no = "$ld_shlibs" && can_build_shared=no
 
 with_gnu_ld=$with_gnu_ld
@@ -12590,18 +13759,19 @@ x|xyes)
       # Test whether the compiler implicitly links with -lc since on some
       # systems, -lgcc has to come before -lc. If gcc already passes -lc
       # to ld, don't add -lc before -lgcc.
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
-$as_echo_n "checking whether -lc should be explicitly linked in... " >&6; }
-if ${lt_cv_archive_cmds_need_lc+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether -lc should be explicitly linked in" >&5
+printf %s "checking whether -lc should be explicitly linked in... " >&6; }
+if test ${lt_cv_archive_cmds_need_lc+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   $RM conftest*
 	echo "$lt_simple_compile_test_code" > conftest.$ac_ext
 
 	if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } 2>conftest.err; then
 	  soname=conftest
 	  lib=conftest
@@ -12619,7 +13789,7 @@ else
 	  if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1\""; } >&5
   (eval $archive_cmds 2\>\&1 \| $GREP \" -lc \" \>/dev/null 2\>\&1) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 	  then
 	    lt_cv_archive_cmds_need_lc=no
@@ -12633,8 +13803,8 @@ else
 	$RM conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5
-$as_echo "$lt_cv_archive_cmds_need_lc" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_archive_cmds_need_lc" >&5
+printf "%s\n" "$lt_cv_archive_cmds_need_lc" >&6; }
       archive_cmds_need_lc=$lt_cv_archive_cmds_need_lc
       ;;
     esac
@@ -12793,8 +13963,8 @@ esac
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
-$as_echo_n "checking dynamic linker characteristics... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking dynamic linker characteristics" >&5
+printf %s "checking dynamic linker characteristics... " >&6; }
 
 if test yes = "$GCC"; then
   case $host_os in
@@ -13355,9 +14525,10 @@ linux* | k*bsd*-gnu | kopensolaris*-gnu | gnu*)
   shlibpath_overrides_runpath=no
 
   # Some binutils ld are patched to set DT_RUNPATH
-  if ${lt_cv_shlibpath_overrides_runpath+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  if test ${lt_cv_shlibpath_overrides_runpath+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   lt_cv_shlibpath_overrides_runpath=no
     save_LDFLAGS=$LDFLAGS
     save_libdir=$libdir
@@ -13367,19 +14538,21 @@ else
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null; then :
+if ac_fn_c_try_link "$LINENO"
+then :
+  if  ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep "RUNPATH.*$libdir" >/dev/null
+then :
   lt_cv_shlibpath_overrides_runpath=yes
 fi
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
     LDFLAGS=$save_LDFLAGS
     libdir=$save_libdir
@@ -13614,8 +14787,8 @@ uts4*)
   dynamic_linker=no
   ;;
 esac
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
-$as_echo "$dynamic_linker" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $dynamic_linker" >&5
+printf "%s\n" "$dynamic_linker" >&6; }
 test no = "$dynamic_linker" && can_build_shared=no
 
 variables_saved_for_relink="PATH $shlibpath_var $runpath_var"
@@ -13736,8 +14909,8 @@ configure_time_lt_sys_library_path=$LT_SYS_LIBRARY_PATH
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
-$as_echo_n "checking how to hardcode library paths into programs... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to hardcode library paths into programs" >&5
+printf %s "checking how to hardcode library paths into programs... " >&6; }
 hardcode_action=
 if test -n "$hardcode_libdir_flag_spec" ||
    test -n "$runpath_var" ||
@@ -13761,8 +14934,8 @@ else
   # directories.
   hardcode_action=unsupported
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
-$as_echo "$hardcode_action" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $hardcode_action" >&5
+printf "%s\n" "$hardcode_action" >&6; }
 
 if test relink = "$hardcode_action" ||
    test yes = "$inherit_rpath"; then
@@ -13806,11 +14979,12 @@ else
 
   darwin*)
     # if libdl is installed we need to link against it
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
-$as_echo_n "checking for dlopen in -ldl... " >&6; }
-if ${ac_cv_lib_dl_dlopen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+printf %s "checking for dlopen in -ldl... " >&6; }
+if test ${ac_cv_lib_dl_dlopen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13819,32 +14993,31 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dlopen ();
 int
-main ()
+main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_dl_dlopen=yes
-else
+else $as_nop
   ac_cv_lib_dl_dlopen=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
-$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
-if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = xyes
+then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
-else
+else $as_nop
 
     lt_cv_dlopen=dyld
     lt_cv_dlopen_libs=
@@ -13864,14 +15037,16 @@ fi
 
   *)
     ac_fn_c_check_func "$LINENO" "shl_load" "ac_cv_func_shl_load"
-if test "x$ac_cv_func_shl_load" = xyes; then :
+if test "x$ac_cv_func_shl_load" = xyes
+then :
   lt_cv_dlopen=shl_load
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
-$as_echo_n "checking for shl_load in -ldld... " >&6; }
-if ${ac_cv_lib_dld_shl_load+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
+printf %s "checking for shl_load in -ldld... " >&6; }
+if test ${ac_cv_lib_dld_shl_load+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13880,41 +15055,42 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char shl_load ();
 int
-main ()
+main (void)
 {
 return shl_load ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_dld_shl_load=yes
-else
+else $as_nop
   ac_cv_lib_dld_shl_load=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
-$as_echo "$ac_cv_lib_dld_shl_load" >&6; }
-if test "x$ac_cv_lib_dld_shl_load" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
+printf "%s\n" "$ac_cv_lib_dld_shl_load" >&6; }
+if test "x$ac_cv_lib_dld_shl_load" = xyes
+then :
   lt_cv_dlopen=shl_load lt_cv_dlopen_libs=-ldld
-else
+else $as_nop
   ac_fn_c_check_func "$LINENO" "dlopen" "ac_cv_func_dlopen"
-if test "x$ac_cv_func_dlopen" = xyes; then :
+if test "x$ac_cv_func_dlopen" = xyes
+then :
   lt_cv_dlopen=dlopen
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
-$as_echo_n "checking for dlopen in -ldl... " >&6; }
-if ${ac_cv_lib_dl_dlopen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+printf %s "checking for dlopen in -ldl... " >&6; }
+if test ${ac_cv_lib_dl_dlopen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13923,37 +15099,37 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dlopen ();
 int
-main ()
+main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_dl_dlopen=yes
-else
+else $as_nop
   ac_cv_lib_dl_dlopen=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
-$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
-if test "x$ac_cv_lib_dl_dlopen" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = xyes
+then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-ldl
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
-$as_echo_n "checking for dlopen in -lsvld... " >&6; }
-if ${ac_cv_lib_svld_dlopen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dlopen in -lsvld" >&5
+printf %s "checking for dlopen in -lsvld... " >&6; }
+if test ${ac_cv_lib_svld_dlopen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lsvld  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -13962,37 +15138,37 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dlopen ();
 int
-main ()
+main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_svld_dlopen=yes
-else
+else $as_nop
   ac_cv_lib_svld_dlopen=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
-$as_echo "$ac_cv_lib_svld_dlopen" >&6; }
-if test "x$ac_cv_lib_svld_dlopen" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_svld_dlopen" >&5
+printf "%s\n" "$ac_cv_lib_svld_dlopen" >&6; }
+if test "x$ac_cv_lib_svld_dlopen" = xyes
+then :
   lt_cv_dlopen=dlopen lt_cv_dlopen_libs=-lsvld
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
-$as_echo_n "checking for dld_link in -ldld... " >&6; }
-if ${ac_cv_lib_dld_dld_link+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for dld_link in -ldld" >&5
+printf %s "checking for dld_link in -ldld... " >&6; }
+if test ${ac_cv_lib_dld_dld_link+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -14001,30 +15177,29 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dld_link ();
 int
-main ()
+main (void)
 {
 return dld_link ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_dld_dld_link=yes
-else
+else $as_nop
   ac_cv_lib_dld_dld_link=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
-$as_echo "$ac_cv_lib_dld_dld_link" >&6; }
-if test "x$ac_cv_lib_dld_dld_link" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_dld_link" >&5
+printf "%s\n" "$ac_cv_lib_dld_dld_link" >&6; }
+if test "x$ac_cv_lib_dld_dld_link" = xyes
+then :
   lt_cv_dlopen=dld_link lt_cv_dlopen_libs=-ldld
 fi
 
@@ -14063,11 +15238,12 @@ fi
     save_LIBS=$LIBS
     LIBS="$lt_cv_dlopen_libs $LIBS"
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
-$as_echo_n "checking whether a program can dlopen itself... " >&6; }
-if ${lt_cv_dlopen_self+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a program can dlopen itself" >&5
+printf %s "checking whether a program can dlopen itself... " >&6; }
+if test ${lt_cv_dlopen_self+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   	  if test yes = "$cross_compiling"; then :
   lt_cv_dlopen_self=cross
 else
@@ -14146,7 +15322,7 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
@@ -14164,16 +15340,17 @@ rm -fr conftest*
 
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
-$as_echo "$lt_cv_dlopen_self" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self" >&5
+printf "%s\n" "$lt_cv_dlopen_self" >&6; }
 
     if test yes = "$lt_cv_dlopen_self"; then
       wl=$lt_prog_compiler_wl eval LDFLAGS=\"\$LDFLAGS $lt_prog_compiler_static\"
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
-$as_echo_n "checking whether a statically linked program can dlopen itself... " >&6; }
-if ${lt_cv_dlopen_self_static+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether a statically linked program can dlopen itself" >&5
+printf %s "checking whether a statically linked program can dlopen itself... " >&6; }
+if test ${lt_cv_dlopen_self_static+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   	  if test yes = "$cross_compiling"; then :
   lt_cv_dlopen_self_static=cross
 else
@@ -14252,7 +15429,7 @@ _LT_EOF
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_link\""; } >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && test -s "conftest$ac_exeext" 2>/dev/null; then
     (./conftest; exit; ) >&5 2>/dev/null
     lt_status=$?
@@ -14270,8 +15447,8 @@ rm -fr conftest*
 
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
-$as_echo "$lt_cv_dlopen_self_static" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $lt_cv_dlopen_self_static" >&5
+printf "%s\n" "$lt_cv_dlopen_self_static" >&6; }
     fi
 
     CPPFLAGS=$save_CPPFLAGS
@@ -14309,13 +15486,13 @@ fi
 
 striplib=
 old_striplib=
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
-$as_echo_n "checking whether stripping libraries is possible... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether stripping libraries is possible" >&5
+printf %s "checking whether stripping libraries is possible... " >&6; }
 if test -n "$STRIP" && $STRIP -V 2>&1 | $GREP "GNU strip" >/dev/null; then
   test -z "$old_striplib" && old_striplib="$STRIP --strip-debug"
   test -z "$striplib" && striplib="$STRIP --strip-unneeded"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 else
 # FIXME - insert some real tests, host_os isn't really good enough
   case $host_os in
@@ -14323,16 +15500,16 @@ else
     if test -n "$STRIP"; then
       striplib="$STRIP -x"
       old_striplib="$STRIP -S"
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
     else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
     fi
     ;;
   *)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
     ;;
   esac
 fi
@@ -14349,13 +15526,13 @@ fi
 
 
   # Report what library types will actually be built
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
-$as_echo_n "checking if libtool supports shared libraries... " >&6; }
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
-$as_echo "$can_build_shared" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libtool supports shared libraries" >&5
+printf %s "checking if libtool supports shared libraries... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $can_build_shared" >&5
+printf "%s\n" "$can_build_shared" >&6; }
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
-$as_echo_n "checking whether to build shared libraries... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to build shared libraries" >&5
+printf %s "checking whether to build shared libraries... " >&6; }
   test no = "$can_build_shared" && enable_shared=no
 
   # On AIX, shared libraries and static libraries use the same namespace, and
@@ -14379,15 +15556,15 @@ $as_echo_n "checking whether to build shared libraries... " >&6; }
     fi
     ;;
   esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
-$as_echo "$enable_shared" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_shared" >&5
+printf "%s\n" "$enable_shared" >&6; }
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
-$as_echo_n "checking whether to build static libraries... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to build static libraries" >&5
+printf %s "checking whether to build static libraries... " >&6; }
   # Make sure either enable_shared or enable_static is yes.
   test yes = "$enable_shared" || enable_static=yes
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
-$as_echo "$enable_static" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enable_static" >&5
+printf "%s\n" "$enable_static" >&6; }
 
 
 
@@ -14438,11 +15615,12 @@ if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
 	if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
 set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_PKG_CONFIG+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_PKG_CONFIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $PKG_CONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
@@ -14452,11 +15630,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_PKG_CONFIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14468,11 +15650,11 @@ esac
 fi
 PKG_CONFIG=$ac_cv_path_PKG_CONFIG
 if test -n "$PKG_CONFIG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
-$as_echo "$PKG_CONFIG" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+printf "%s\n" "$PKG_CONFIG" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -14481,11 +15663,12 @@ if test -z "$ac_cv_path_PKG_CONFIG"; then
   ac_pt_PKG_CONFIG=$PKG_CONFIG
   # Extract the first word of "pkg-config", so it can be a program name with args.
 set dummy pkg-config; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_ac_pt_PKG_CONFIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $ac_pt_PKG_CONFIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
@@ -14495,11 +15678,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_ac_pt_PKG_CONFIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -14511,11 +15698,11 @@ esac
 fi
 ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
 if test -n "$ac_pt_PKG_CONFIG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
-$as_echo "$ac_pt_PKG_CONFIG" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
+printf "%s\n" "$ac_pt_PKG_CONFIG" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_pt_PKG_CONFIG" = x; then
@@ -14523,8 +15710,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     PKG_CONFIG=$ac_pt_PKG_CONFIG
@@ -14536,39 +15723,213 @@ fi
 fi
 if test -n "$PKG_CONFIG"; then
 	_pkg_min_version=0.9.0
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
-$as_echo_n "checking pkg-config is at least version $_pkg_min_version... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
+printf %s "checking pkg-config is at least version $_pkg_min_version... " >&6; }
 	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	else
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 		PKG_CONFIG=""
 	fi
 fi
 fi
 
 # Checks for header files.
-for ac_header in stdarg.h stdbool.h netinet/in.h netinet/tcp.h sys/param.h sys/select.h sys/socket.h sys/un.h sys/uio.h sys/resource.h arpa/inet.h syslog.h netdb.h sys/wait.h pwd.h glob.h grp.h login_cap.h winsock2.h ws2tcpip.h endian.h sys/endian.h libkern/OSByteOrder.h sys/ipc.h sys/shm.h ifaddrs.h poll.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "stdarg.h" "ac_cv_header_stdarg_h" "$ac_includes_default
 "
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
+if test "x$ac_cv_header_stdarg_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_STDARG_H 1" >>confdefs.h
 
 fi
+ac_fn_c_check_header_compile "$LINENO" "stdbool.h" "ac_cv_header_stdbool_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_stdbool_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_STDBOOL_H 1" >>confdefs.h
 
-done
+fi
+ac_fn_c_check_header_compile "$LINENO" "netinet/in.h" "ac_cv_header_netinet_in_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_netinet_in_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETINET_IN_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "netinet/tcp.h" "ac_cv_header_netinet_tcp_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_netinet_tcp_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETINET_TCP_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/param.h" "ac_cv_header_sys_param_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_param_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_PARAM_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/select.h" "ac_cv_header_sys_select_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_select_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SELECT_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/socket.h" "ac_cv_header_sys_socket_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_socket_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SOCKET_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/un.h" "ac_cv_header_sys_un_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_un_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_UN_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/uio.h" "ac_cv_header_sys_uio_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_uio_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_UIO_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/resource.h" "ac_cv_header_sys_resource_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_resource_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_RESOURCE_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "arpa/inet.h" "ac_cv_header_arpa_inet_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_arpa_inet_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_ARPA_INET_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "syslog.h" "ac_cv_header_syslog_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_syslog_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYSLOG_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "netdb.h" "ac_cv_header_netdb_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_netdb_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETDB_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/wait.h" "ac_cv_header_sys_wait_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_wait_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_WAIT_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "pwd.h" "ac_cv_header_pwd_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_pwd_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_PWD_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "glob.h" "ac_cv_header_glob_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_glob_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_GLOB_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "grp.h" "ac_cv_header_grp_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_grp_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_GRP_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "login_cap.h" "ac_cv_header_login_cap_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_login_cap_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_LOGIN_CAP_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "winsock2.h" "ac_cv_header_winsock2_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_winsock2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINSOCK2_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "ws2tcpip.h" "ac_cv_header_ws2tcpip_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_ws2tcpip_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WS2TCPIP_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "endian.h" "ac_cv_header_endian_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_endian_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_ENDIAN_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/endian.h" "ac_cv_header_sys_endian_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_endian_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_ENDIAN_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "libkern/OSByteOrder.h" "ac_cv_header_libkern_OSByteOrder_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_libkern_OSByteOrder_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_LIBKERN_OSBYTEORDER_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/ipc.h" "ac_cv_header_sys_ipc_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_ipc_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_IPC_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "sys/shm.h" "ac_cv_header_sys_shm_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_sys_shm_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SHM_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "ifaddrs.h" "ac_cv_header_ifaddrs_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_ifaddrs_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_IFADDRS_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "poll.h" "ac_cv_header_poll_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_poll_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_POLL_H 1" >>confdefs.h
+
+fi
 
 # net/if.h portability for Darwin see:
 # https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Header-Portability.html
-for ac_header in net/if.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "net/if.h" "ac_cv_header_net_if_h" "
+ac_fn_c_check_header_compile "$LINENO" "net/if.h" "ac_cv_header_net_if_h" "
 #include <stdio.h>
 #ifdef STDC_HEADERS
 # include <stdlib.h>
@@ -14583,33 +15944,23 @@ do :
 #endif
 
 "
-if test "x$ac_cv_header_net_if_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NET_IF_H 1
-_ACEOF
+if test "x$ac_cv_header_net_if_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NET_IF_H 1" >>confdefs.h
 
 fi
 
-done
-
 
 # Check for Apple header. This uncovers TARGET_OS_IPHONE, TARGET_OS_TV or TARGET_OS_WATCH
-for ac_header in TargetConditionals.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "TargetConditionals.h" "ac_cv_header_TargetConditionals_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "TargetConditionals.h" "ac_cv_header_TargetConditionals_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_TargetConditionals_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_TARGETCONDITIONALS_H 1
-_ACEOF
+if test "x$ac_cv_header_TargetConditionals_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_TARGETCONDITIONALS_H 1" >>confdefs.h
 
 fi
 
-done
-
-for ac_header in netioapi.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "netioapi.h" "ac_cv_header_netioapi_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "netioapi.h" "ac_cv_header_netioapi_h" "$ac_includes_default
 #if HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
@@ -14643,192 +15994,334 @@ do :
 #endif
 
 "
-if test "x$ac_cv_header_netioapi_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NETIOAPI_H 1
-_ACEOF
+if test "x$ac_cv_header_netioapi_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETIOAPI_H 1" >>confdefs.h
 
 fi
 
-done
-
 
 # Check for Linux timestamping headers
-for ac_header in linux/net_tstamp.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "linux/net_tstamp.h" "ac_cv_header_linux_net_tstamp_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "linux/net_tstamp.h" "ac_cv_header_linux_net_tstamp_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_linux_net_tstamp_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LINUX_NET_TSTAMP_H 1
-_ACEOF
+if test "x$ac_cv_header_linux_net_tstamp_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_LINUX_NET_TSTAMP_H 1" >>confdefs.h
 
 fi
 
-done
-
 
 # check for types.
 # Using own tests for int64* because autoconf builtin only give 32bit.
 ac_fn_c_check_type "$LINENO" "int8_t" "ac_cv_type_int8_t" "$ac_includes_default"
-if test "x$ac_cv_type_int8_t" = xyes; then :
+if test "x$ac_cv_type_int8_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define int8_t signed char
-_ACEOF
+printf "%s\n" "#define int8_t signed char" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "int16_t" "ac_cv_type_int16_t" "$ac_includes_default"
-if test "x$ac_cv_type_int16_t" = xyes; then :
+if test "x$ac_cv_type_int16_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define int16_t short
-_ACEOF
+printf "%s\n" "#define int16_t short" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "int32_t" "ac_cv_type_int32_t" "$ac_includes_default"
-if test "x$ac_cv_type_int32_t" = xyes; then :
+if test "x$ac_cv_type_int32_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define int32_t int
-_ACEOF
+printf "%s\n" "#define int32_t int" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "int64_t" "ac_cv_type_int64_t" "$ac_includes_default"
-if test "x$ac_cv_type_int64_t" = xyes; then :
+if test "x$ac_cv_type_int64_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define int64_t long long
-_ACEOF
+printf "%s\n" "#define int64_t long long" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "uint8_t" "ac_cv_type_uint8_t" "$ac_includes_default"
-if test "x$ac_cv_type_uint8_t" = xyes; then :
+if test "x$ac_cv_type_uint8_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define uint8_t unsigned char
-_ACEOF
+printf "%s\n" "#define uint8_t unsigned char" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "uint16_t" "ac_cv_type_uint16_t" "$ac_includes_default"
-if test "x$ac_cv_type_uint16_t" = xyes; then :
+if test "x$ac_cv_type_uint16_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define uint16_t unsigned short
-_ACEOF
+printf "%s\n" "#define uint16_t unsigned short" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "uint32_t" "ac_cv_type_uint32_t" "$ac_includes_default"
-if test "x$ac_cv_type_uint32_t" = xyes; then :
+if test "x$ac_cv_type_uint32_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define uint32_t unsigned int
-_ACEOF
+printf "%s\n" "#define uint32_t unsigned int" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "uint64_t" "ac_cv_type_uint64_t" "$ac_includes_default"
-if test "x$ac_cv_type_uint64_t" = xyes; then :
+if test "x$ac_cv_type_uint64_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define uint64_t unsigned long long
-_ACEOF
+printf "%s\n" "#define uint64_t unsigned long long" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
-if test "x$ac_cv_type_size_t" = xyes; then :
+if test "x$ac_cv_type_size_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define size_t unsigned int
-_ACEOF
+printf "%s\n" "#define size_t unsigned int" >>confdefs.h
 
 fi
 
 ac_fn_c_check_type "$LINENO" "ssize_t" "ac_cv_type_ssize_t" "$ac_includes_default"
-if test "x$ac_cv_type_ssize_t" = xyes; then :
+if test "x$ac_cv_type_ssize_t" = xyes
+then :
 
-else
+else $as_nop
+
+printf "%s\n" "#define ssize_t int" >>confdefs.h
+
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
+printf %s "checking how to run the C preprocessor... " >&6; }
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+  if test ${ac_cv_prog_CPP+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+      # Double quotes because $CC needs to be expanded
+    for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
+    do
+      ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define ssize_t int
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
 _ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
 
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+  break
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for uid_t in sys/types.h" >&5
-$as_echo_n "checking for uid_t in sys/types.h... " >&6; }
-if ${ac_cv_type_uid_t+:} false; then :
-  $as_echo_n "(cached) " >&6
+    done
+    ac_cv_prog_CPP=$CPP
+
+fi
+  CPP=$ac_cv_prog_CPP
 else
+  ac_cv_prog_CPP=$CPP
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
+printf "%s\n" "$CPP" >&6; }
+ac_preproc_ok=false
+for ac_c_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <limits.h>
+		     Syntax error
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+
+else $as_nop
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether nonexistent headers
+  # can be detected and how.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"
+then :
+  # Broken: success on invalid input.
+continue
+else $as_nop
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.i conftest.err conftest.$ac_ext
+if $ac_preproc_ok
+then :
+
+else $as_nop
+  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+See \`config.log' for more details" "$LINENO" 5; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for uid_t in sys/types.h" >&5
+printf %s "checking for uid_t in sys/types.h... " >&6; }
+if test ${ac_cv_type_uid_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "uid_t" >/dev/null 2>&1; then :
+  $EGREP "uid_t" >/dev/null 2>&1
+then :
   ac_cv_type_uid_t=yes
-else
+else $as_nop
   ac_cv_type_uid_t=no
 fi
-rm -f conftest*
+rm -rf conftest*
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_uid_t" >&5
-$as_echo "$ac_cv_type_uid_t" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_uid_t" >&5
+printf "%s\n" "$ac_cv_type_uid_t" >&6; }
 if test $ac_cv_type_uid_t = no; then
 
-$as_echo "#define uid_t int" >>confdefs.h
+printf "%s\n" "#define uid_t int" >>confdefs.h
 
 
-$as_echo "#define gid_t int" >>confdefs.h
+printf "%s\n" "#define gid_t int" >>confdefs.h
 
 fi
 
-ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default"
-if test "x$ac_cv_type_pid_t" = xyes; then :
 
-else
+  ac_fn_c_check_type "$LINENO" "pid_t" "ac_cv_type_pid_t" "$ac_includes_default
+"
+if test "x$ac_cv_type_pid_t" = xyes
+then :
+
+else $as_nop
+                                          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+          #if defined _WIN64 && !defined __CYGWIN__
+          LLP64
+          #endif
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
 
-cat >>confdefs.h <<_ACEOF
-#define pid_t int
 _ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_pid_type='int'
+else $as_nop
+  ac_pid_type='__int64'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+printf "%s\n" "#define pid_t $ac_pid_type" >>confdefs.h
+
 
 fi
 
+
 ac_fn_c_check_type "$LINENO" "off_t" "ac_cv_type_off_t" "$ac_includes_default"
-if test "x$ac_cv_type_off_t" = xyes; then :
+if test "x$ac_cv_type_off_t" = xyes
+then :
 
-else
+else $as_nop
 
-cat >>confdefs.h <<_ACEOF
-#define off_t long int
-_ACEOF
+printf "%s\n" "#define off_t long int" >>confdefs.h
 
 fi
 
@@ -14839,11 +16332,12 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_type_u_char" = xyes; then :
+if test "x$ac_cv_type_u_char" = xyes
+then :
 
-else
+else $as_nop
 
-$as_echo "#define u_char unsigned char" >>confdefs.h
+printf "%s\n" "#define u_char unsigned char" >>confdefs.h
 
 fi
 
@@ -14854,11 +16348,12 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_type_rlim_t" = xyes; then :
+if test "x$ac_cv_type_rlim_t" = xyes
+then :
 
-else
+else $as_nop
 
-$as_echo "#define rlim_t unsigned long" >>confdefs.h
+printf "%s\n" "#define rlim_t unsigned long" >>confdefs.h
 
 fi
 
@@ -14873,11 +16368,12 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_type_socklen_t" = xyes; then :
+if test "x$ac_cv_type_socklen_t" = xyes
+then :
 
-else
+else $as_nop
 
-$as_echo "#define socklen_t int" >>confdefs.h
+printf "%s\n" "#define socklen_t int" >>confdefs.h
 
 fi
 
@@ -14891,11 +16387,12 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_type_in_addr_t" = xyes; then :
+if test "x$ac_cv_type_in_addr_t" = xyes
+then :
 
-else
+else $as_nop
 
-$as_echo "#define in_addr_t uint32_t" >>confdefs.h
+printf "%s\n" "#define in_addr_t uint32_t" >>confdefs.h
 
 fi
 
@@ -14909,21 +16406,23 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_type_in_port_t" = xyes; then :
+if test "x$ac_cv_type_in_port_t" = xyes
+then :
 
-else
+else $as_nop
 
-$as_echo "#define in_port_t uint16_t" >>confdefs.h
+printf "%s\n" "#define in_port_t uint16_t" >>confdefs.h
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if memcmp compares unsigned" >&5
-$as_echo_n "checking if memcmp compares unsigned... " >&6; }
-if test "$cross_compiling" = yes; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: cross-compile no" >&5
-$as_echo "cross-compile no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if memcmp compares unsigned" >&5
+printf %s "checking if memcmp compares unsigned... " >&6; }
+if test "$cross_compiling" = yes
+then :
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: cross-compile no" >&5
+printf "%s\n" "cross-compile no" >&6; }
 
-$as_echo "#define MEMCMP_IS_BROKEN 1" >>confdefs.h
+printf "%s\n" "#define MEMCMP_IS_BROKEN 1" >>confdefs.h
 
   case " $LIBOBJS " in
   *" memcmp.$ac_objext "* ) ;;
@@ -14932,7 +16431,7 @@ $as_echo "#define MEMCMP_IS_BROKEN 1" >>confdefs.h
 esac
 
 
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -14948,14 +16447,15 @@ int main(void)
 }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+if ac_fn_c_try_run "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+else $as_nop
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
-$as_echo "#define MEMCMP_IS_BROKEN 1" >>confdefs.h
+printf "%s\n" "#define MEMCMP_IS_BROKEN 1" >>confdefs.h
 
   case " $LIBOBJS " in
   *" memcmp.$ac_objext "* ) ;;
@@ -14974,11 +16474,12 @@ fi
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of time_t" >&5
-$as_echo_n "checking size of time_t... " >&6; }
-if ${ac_cv_sizeof_time_t+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of time_t" >&5
+printf %s "checking size of time_t... " >&6; }
+if test ${ac_cv_sizeof_time_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (time_t))" "ac_cv_sizeof_time_t"        "
 $ac_includes_default
 #ifdef TIME_WITH_SYS_TIME
@@ -14992,12 +16493,13 @@ $ac_includes_default
 # endif
 #endif
 
-"; then :
+"
+then :
 
-else
+else $as_nop
   if test "$ac_cv_type_time_t" = yes; then
-     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (time_t)
 See \`config.log' for more details" "$LINENO" 5; }
    else
@@ -15006,31 +16508,31 @@ See \`config.log' for more details" "$LINENO" 5; }
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_time_t" >&5
-$as_echo "$ac_cv_sizeof_time_t" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_time_t" >&5
+printf "%s\n" "$ac_cv_sizeof_time_t" >&6; }
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SIZEOF_TIME_T $ac_cv_sizeof_time_t
-_ACEOF
+printf "%s\n" "#define SIZEOF_TIME_T $ac_cv_sizeof_time_t" >>confdefs.h
 
 
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of size_t" >&5
-$as_echo_n "checking size of size_t... " >&6; }
-if ${ac_cv_sizeof_size_t+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (size_t))" "ac_cv_sizeof_size_t"        "$ac_includes_default"; then :
-
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of size_t" >&5
+printf %s "checking size of size_t... " >&6; }
+if test ${ac_cv_sizeof_size_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (size_t))" "ac_cv_sizeof_size_t"        "$ac_includes_default"
+then :
+
+else $as_nop
   if test "$ac_cv_type_size_t" = yes; then
-     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (size_t)
 See \`config.log' for more details" "$LINENO" 5; }
    else
@@ -15039,23 +16541,22 @@ See \`config.log' for more details" "$LINENO" 5; }
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_size_t" >&5
-$as_echo "$ac_cv_sizeof_size_t" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_size_t" >&5
+printf "%s\n" "$ac_cv_sizeof_size_t" >&6; }
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SIZEOF_SIZE_T $ac_cv_sizeof_size_t
-_ACEOF
+printf "%s\n" "#define SIZEOF_SIZE_T $ac_cv_sizeof_size_t" >>confdefs.h
 
 
 
 # add option to disable the evil rpath
 
 # Check whether --enable-rpath was given.
-if test "${enable_rpath+set}" = set; then :
+if test ${enable_rpath+y}
+then :
   enableval=$enable_rpath; enable_rpath=$enableval
-else
+else $as_nop
   enable_rpath=yes
 fi
 
@@ -15067,11 +16568,12 @@ fi
 
 
 # check to see if libraries are needed for these functions.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing inet_pton" >&5
-$as_echo_n "checking for library containing inet_pton... " >&6; }
-if ${ac_cv_search_inet_pton+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing inet_pton" >&5
+printf %s "checking for library containing inet_pton... " >&6; }
+if test ${ac_cv_search_inet_pton+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15079,55 +16581,58 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char inet_pton ();
 int
-main ()
+main (void)
 {
 return inet_pton ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' nsl; do
+for ac_lib in '' nsl
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_inet_pton=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_inet_pton+:} false; then :
+  if test ${ac_cv_search_inet_pton+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_inet_pton+:} false; then :
+if test ${ac_cv_search_inet_pton+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_inet_pton=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_pton" >&5
-$as_echo "$ac_cv_search_inet_pton" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_inet_pton" >&5
+printf "%s\n" "$ac_cv_search_inet_pton" >&6; }
 ac_res=$ac_cv_search_inet_pton
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing socket" >&5
-$as_echo_n "checking for library containing socket... " >&6; }
-if ${ac_cv_search_socket+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing socket" >&5
+printf %s "checking for library containing socket... " >&6; }
+if test ${ac_cv_search_socket+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15135,46 +16640,48 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char socket ();
 int
-main ()
+main (void)
 {
 return socket ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' socket; do
+for ac_lib in '' socket
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_socket=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_socket+:} false; then :
+  if test ${ac_cv_search_socket+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_socket+:} false; then :
+if test ${ac_cv_search_socket+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_socket=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_socket" >&5
-$as_echo "$ac_cv_search_socket" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_socket" >&5
+printf "%s\n" "$ac_cv_search_socket" >&6; }
 ac_res=$ac_cv_search_socket
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -15183,33 +16690,28 @@ fi
 # check whether strptime also works
 
 # check some functions of the OS before linking libs (while still runnable).
-for ac_header in unistd.h
-do :
-  ac_fn_c_check_header_mongrel "$LINENO" "unistd.h" "ac_cv_header_unistd_h" "$ac_includes_default"
-if test "x$ac_cv_header_unistd_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_UNISTD_H 1
-_ACEOF
-
-fi
-
-done
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working chown" >&5
-$as_echo_n "checking for working chown... " >&6; }
-if ${ac_cv_func_chown_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
-  ac_cv_func_chown_works=no
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working chown" >&5
+printf %s "checking for working chown... " >&6; }
+if test ${ac_cv_func_chown_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
+  case "$host_os" in # ((
+			  # Guess yes on glibc systems.
+		  *-gnu*) ac_cv_func_chown_works=yes ;;
+			  # If we don't know, assume the worst.
+		  *)      ac_cv_func_chown_works=no ;;
+		esac
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 #include <fcntl.h>
 
 int
-main ()
+main (void)
 {
   char *f = "conftest.chown";
   struct stat before, after;
@@ -15228,9 +16730,10 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   ac_cv_func_chown_works=yes
-else
+else $as_nop
   ac_cv_func_chown_works=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -15240,52 +16743,47 @@ fi
 rm -f conftest.chown
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_chown_works" >&5
-$as_echo "$ac_cv_func_chown_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_chown_works" >&5
+printf "%s\n" "$ac_cv_func_chown_works" >&6; }
 if test $ac_cv_func_chown_works = yes; then
 
-$as_echo "#define HAVE_CHOWN 1" >>confdefs.h
+printf "%s\n" "#define HAVE_CHOWN 1" >>confdefs.h
 
 fi
 
-for ac_header in vfork.h
-do :
-  ac_fn_c_check_header_mongrel "$LINENO" "vfork.h" "ac_cv_header_vfork_h" "$ac_includes_default"
-if test "x$ac_cv_header_vfork_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_VFORK_H 1
-_ACEOF
-
-fi
 
+ac_func=
+for ac_item in $ac_func_c_list
+do
+  if test $ac_func; then
+    ac_fn_c_check_func "$LINENO" $ac_func ac_cv_func_$ac_func
+    if eval test \"x\$ac_cv_func_$ac_func\" = xyes; then
+      echo "#define $ac_item 1" >> confdefs.h
+    fi
+    ac_func=
+  else
+    ac_func=$ac_item
+  fi
 done
 
-for ac_func in fork vfork
-do :
-  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
 
-fi
-done
 
 if test "x$ac_cv_func_fork" = xyes; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working fork" >&5
-$as_echo_n "checking for working fork... " >&6; }
-if ${ac_cv_func_fork_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working fork" >&5
+printf %s "checking for working fork... " >&6; }
+if test ${ac_cv_func_fork_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
   ac_cv_func_fork_works=cross
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 int
-main ()
+main (void)
 {
 
 	  /* By Ruediger Kuhlmann. */
@@ -15295,9 +16793,10 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   ac_cv_func_fork_works=yes
-else
+else $as_nop
   ac_cv_func_fork_works=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -15305,8 +16804,8 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_fork_works" >&5
-$as_echo "$ac_cv_func_fork_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_fork_works" >&5
+printf "%s\n" "$ac_cv_func_fork_works" >&6; }
 
 else
   ac_cv_func_fork_works=$ac_cv_func_fork
@@ -15321,27 +16820,37 @@ if test "x$ac_cv_func_fork_works" = xcross; then
       ac_cv_func_fork_works=yes
       ;;
   esac
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&5
-$as_echo "$as_me: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&5
+printf "%s\n" "$as_me: WARNING: result $ac_cv_func_fork_works guessed because of cross compilation" >&2;}
 fi
 ac_cv_func_vfork_works=$ac_cv_func_vfork
 if test "x$ac_cv_func_vfork" = xyes; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working vfork" >&5
-$as_echo_n "checking for working vfork... " >&6; }
-if ${ac_cv_func_vfork_works+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for working vfork" >&5
+printf %s "checking for working vfork... " >&6; }
+if test ${ac_cv_func_vfork_works+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test "$cross_compiling" = yes
+then :
   ac_cv_func_vfork_works=cross
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 /* Thanks to Paul Eggert for this test.  */
 $ac_includes_default
+#include <signal.h>
 #include <sys/wait.h>
 #ifdef HAVE_VFORK_H
 # include <vfork.h>
 #endif
+
+static void
+do_nothing (int sig)
+{
+  (void) sig;
+}
+
 /* On some sparc systems, changes by the child to local and incoming
    argument registers are propagated back to the parent.  The compiler
    is told about this with #include <vfork.h>, but some compilers
@@ -15349,11 +16858,7 @@ $ac_includes_default
    static variable whose address is put into a register that is
    clobbered by the vfork.  */
 static void
-#ifdef __cplusplus
 sparc_address_test (int arg)
-# else
-sparc_address_test (arg) int arg;
-#endif
 {
   static pid_t child;
   if (!child) {
@@ -15371,13 +16876,18 @@ sparc_address_test (arg) int arg;
 }
 
 int
-main ()
+main (void)
 {
   pid_t parent = getpid ();
   pid_t child;
 
   sparc_address_test (0);
 
+  /* On Solaris 2.4, changes by the child to the signal handler
+     also munge signal handlers in the parent.  To detect this,
+     start by putting the parent's handler in a known state.  */
+  signal (SIGTERM, SIG_DFL);
+
   child = vfork ();
 
   if (child == 0) {
@@ -15399,6 +16909,10 @@ main ()
 	|| p != p5 || p != p6 || p != p7)
       _exit(1);
 
+    /* Alter the child's signal handler.  */
+    if (signal (SIGTERM, do_nothing) != SIG_DFL)
+      _exit(1);
+
     /* On some systems (e.g. IRIX 3.3), vfork doesn't separate parent
        from child file descriptors.  If the child closes a descriptor
        before it execs or exits, this munges the parent's descriptor
@@ -15414,6 +16928,9 @@ main ()
 	 /* Was there some problem with vforking?  */
 	 child < 0
 
+	 /* Did the child munge the parent's signal handler?  */
+	 || signal (SIGTERM, SIG_DFL) != SIG_DFL
+
 	 /* Did the child fail?  (This shouldn't happen.)  */
 	 || status
 
@@ -15426,9 +16943,10 @@ main ()
   }
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   ac_cv_func_vfork_works=yes
-else
+else $as_nop
   ac_cv_func_vfork_works=no
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -15436,46 +16954,47 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_vfork_works" >&5
-$as_echo "$ac_cv_func_vfork_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_vfork_works" >&5
+printf "%s\n" "$ac_cv_func_vfork_works" >&6; }
 
 fi;
 if test "x$ac_cv_func_fork_works" = xcross; then
   ac_cv_func_vfork_works=$ac_cv_func_vfork
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&5
-$as_echo "$as_me: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&5
+printf "%s\n" "$as_me: WARNING: result $ac_cv_func_vfork_works guessed because of cross compilation" >&2;}
 fi
 
 if test "x$ac_cv_func_vfork_works" = xyes; then
 
-$as_echo "#define HAVE_WORKING_VFORK 1" >>confdefs.h
+printf "%s\n" "#define HAVE_WORKING_VFORK 1" >>confdefs.h
 
 else
 
-$as_echo "#define vfork fork" >>confdefs.h
+printf "%s\n" "#define vfork fork" >>confdefs.h
 
 fi
 if test "x$ac_cv_func_fork_works" = xyes; then
 
-$as_echo "#define HAVE_WORKING_FORK 1" >>confdefs.h
+printf "%s\n" "#define HAVE_WORKING_FORK 1" >>confdefs.h
 
 fi
 
 
-$as_echo "#define RETSIGTYPE void" >>confdefs.h
+printf "%s\n" "#define RETSIGTYPE void" >>confdefs.h
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGEFILE_SOURCE value needed for large files" >&5
-$as_echo_n "checking for _LARGEFILE_SOURCE value needed for large files... " >&6; }
-if ${ac_cv_sys_largefile_source+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _LARGEFILE_SOURCE value needed for large files" >&5
+printf %s "checking for _LARGEFILE_SOURCE value needed for large files... " >&6; }
+if test ${ac_cv_sys_largefile_source+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   while :; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h> /* for off_t */
      #include <stdio.h>
 int
-main ()
+main (void)
 {
 int (*fp) (FILE *, off_t, int) = fseeko;
      return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
@@ -15483,10 +17002,11 @@ int (*fp) (FILE *, off_t, int) = fseeko;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_sys_largefile_source=no; break
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15494,7 +17014,7 @@ rm -f core conftest.err conftest.$ac_objext \
 #include <sys/types.h> /* for off_t */
      #include <stdio.h>
 int
-main ()
+main (void)
 {
 int (*fp) (FILE *, off_t, int) = fseeko;
      return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
@@ -15502,23 +17022,22 @@ int (*fp) (FILE *, off_t, int) = fseeko;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_sys_largefile_source=1; break
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
   ac_cv_sys_largefile_source=unknown
   break
 done
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_source" >&5
-$as_echo "$ac_cv_sys_largefile_source" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_source" >&5
+printf "%s\n" "$ac_cv_sys_largefile_source" >&6; }
 case $ac_cv_sys_largefile_source in #(
   no | unknown) ;;
   *)
-cat >>confdefs.h <<_ACEOF
-#define _LARGEFILE_SOURCE $ac_cv_sys_largefile_source
-_ACEOF
+printf "%s\n" "#define _LARGEFILE_SOURCE $ac_cv_sys_largefile_source" >>confdefs.h
 ;;
 esac
 rm -rf conftest*
@@ -15528,23 +17047,25 @@ rm -rf conftest*
 # If you want fseeko and ftello with glibc, upgrade to a fixed glibc.
 if test $ac_cv_sys_largefile_source != unknown; then
 
-$as_echo "#define HAVE_FSEEKO 1" >>confdefs.h
+printf "%s\n" "#define HAVE_FSEEKO 1" >>confdefs.h
 
 fi
 
 
 # Check whether --enable-largefile was given.
-if test "${enable_largefile+set}" = set; then :
+if test ${enable_largefile+y}
+then :
   enableval=$enable_largefile;
 fi
 
 if test "$enable_largefile" != no; then
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
-$as_echo_n "checking for special C compiler options needed for large files... " >&6; }
-if ${ac_cv_sys_largefile_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
+printf %s "checking for special C compiler options needed for large files... " >&6; }
+if test ${ac_cv_sys_largefile_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_cv_sys_largefile_CC=no
      if test "$GCC" != yes; then
        ac_save_CC=$CC
@@ -15558,44 +17079,47 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-	 if ac_fn_c_try_compile "$LINENO"; then :
+	 if ac_fn_c_try_compile "$LINENO"
+then :
   break
 fi
-rm -f core conftest.err conftest.$ac_objext
+rm -f core conftest.err conftest.$ac_objext conftest.beam
 	 CC="$CC -n32"
-	 if ac_fn_c_try_compile "$LINENO"; then :
+	 if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_sys_largefile_CC=' -n32'; break
 fi
-rm -f core conftest.err conftest.$ac_objext
+rm -f core conftest.err conftest.$ac_objext conftest.beam
 	 break
        done
        CC=$ac_save_CC
        rm -f conftest.$ac_ext
     fi
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
-$as_echo "$ac_cv_sys_largefile_CC" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
+printf "%s\n" "$ac_cv_sys_largefile_CC" >&6; }
   if test "$ac_cv_sys_largefile_CC" != no; then
     CC=$CC$ac_cv_sys_largefile_CC
   fi
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
-$as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
-if ${ac_cv_sys_file_offset_bits+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+printf %s "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
+if test ${ac_cv_sys_file_offset_bits+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   while :; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15604,22 +17128,23 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_sys_file_offset_bits=no; break
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _FILE_OFFSET_BITS 64
@@ -15628,43 +17153,43 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_sys_file_offset_bits=64; break
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   ac_cv_sys_file_offset_bits=unknown
   break
 done
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
-$as_echo "$ac_cv_sys_file_offset_bits" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
+printf "%s\n" "$ac_cv_sys_file_offset_bits" >&6; }
 case $ac_cv_sys_file_offset_bits in #(
   no | unknown) ;;
   *)
-cat >>confdefs.h <<_ACEOF
-#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits
-_ACEOF
+printf "%s\n" "#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits" >>confdefs.h
 ;;
 esac
 rm -rf conftest*
   if test $ac_cv_sys_file_offset_bits = unknown; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
-$as_echo_n "checking for _LARGE_FILES value needed for large files... " >&6; }
-if ${ac_cv_sys_large_files+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
+printf %s "checking for _LARGE_FILES value needed for large files... " >&6; }
+if test ${ac_cv_sys_large_files+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   while :; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -15673,22 +17198,23 @@ else
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_sys_large_files=no; break
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _LARGE_FILES 1
@@ -15697,51 +17223,49 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     We can't simply define LARGE_OFF_T to be 9223372036854775807,
     since some C++ compilers masquerading as C compilers
     incorrectly reject 9223372036854775807.  */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T (((off_t) 1 << 31 << 31) - 1 + ((off_t) 1 << 31 << 31))
   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
 		       && LARGE_OFF_T % 2147483647 == 1)
 		      ? 1 : -1];
 int
-main ()
+main (void)
 {
 
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
   ac_cv_sys_large_files=1; break
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   ac_cv_sys_large_files=unknown
   break
 done
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
-$as_echo "$ac_cv_sys_large_files" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
+printf "%s\n" "$ac_cv_sys_large_files" >&6; }
 case $ac_cv_sys_large_files in #(
   no | unknown) ;;
   *)
-cat >>confdefs.h <<_ACEOF
-#define _LARGE_FILES $ac_cv_sys_large_files
-_ACEOF
+printf "%s\n" "#define _LARGE_FILES $ac_cv_sys_large_files" >>confdefs.h
 ;;
 esac
 rm -rf conftest*
   fi
-
-
 fi
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we need -D_LARGEFILE_SOURCE=1 as a flag for $CC" >&5
-$as_echo_n "checking whether we need -D_LARGEFILE_SOURCE=1 as a flag for $CC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether we need -D_LARGEFILE_SOURCE=1 as a flag for $CC" >&5
+printf %s "checking whether we need -D_LARGEFILE_SOURCE=1 as a flag for $CC... " >&6; }
 cache=_D_LARGEFILE_SOURCE_1
-if eval \${cv_prog_cc_flag_needed_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_needed_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <stdio.h>
@@ -15772,14 +17296,14 @@ rm -f conftest conftest.c conftest.o
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE=1"
 else
 if eval "test \"`echo '$cv_prog_cc_flag_needed_'$cache`\" = no"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 #echo 'Test with flag is no!'
 #cat conftest.c
 #echo "$CC $CPPFLAGS $CFLAGS -D_LARGEFILE_SOURCE=1 $ERRFLAG -c conftest.c 2>&1"
@@ -15788,8 +17312,8 @@ $as_echo "no" >&6; }
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
-$as_echo "failed" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+printf "%s\n" "failed" >&6; }
 :
 
 fi
@@ -15797,21 +17321,22 @@ fi
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if nonblocking sockets work" >&5
-$as_echo_n "checking if nonblocking sockets work... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if nonblocking sockets work" >&5
+printf %s "checking if nonblocking sockets work... " >&6; }
 if echo $host | grep mingw >/dev/null; then
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no (windows)" >&5
-$as_echo "no (windows)" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no (windows)" >&5
+printf "%s\n" "no (windows)" >&6; }
 
-$as_echo "#define NONBLOCKING_IS_BROKEN 1" >>confdefs.h
+printf "%s\n" "#define NONBLOCKING_IS_BROKEN 1" >>confdefs.h
 
 else
-if test "$cross_compiling" = yes; then :
+if test "$cross_compiling" = yes
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: crosscompile(yes)" >&5
-$as_echo "crosscompile(yes)" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: crosscompile(yes)" >&5
+printf "%s\n" "crosscompile(yes)" >&6; }
 
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -15941,17 +17466,18 @@ int main(void)
 }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
-$as_echo "#define NONBLOCKING_IS_BROKEN 1" >>confdefs.h
+printf "%s\n" "#define NONBLOCKING_IS_BROKEN 1" >>confdefs.h
 
 
 fi
@@ -15962,8 +17488,8 @@ fi
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether mkdir has one arg" >&5
-$as_echo_n "checking whether mkdir has one arg... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether mkdir has one arg" >&5
+printf %s "checking whether mkdir has one arg... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -15977,7 +17503,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #endif
 
 int
-main ()
+main (void)
 {
 
 	(void)mkdir("directory");
@@ -15986,34 +17512,36 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+if ac_fn_c_try_compile "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define MKDIR_HAS_ONE_ARG 1" >>confdefs.h
+printf "%s\n" "#define MKDIR_HAS_ONE_ARG 1" >>confdefs.h
 
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
 
-for ac_func in strptime
+  for ac_func in strptime
 do :
   ac_fn_c_check_func "$LINENO" "strptime" "ac_cv_func_strptime"
-if test "x$ac_cv_func_strptime" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_STRPTIME 1
-_ACEOF
+if test "x$ac_cv_func_strptime" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRPTIME 1" >>confdefs.h
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether strptime works" >&5
-$as_echo_n "checking whether strptime works... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether strptime works" >&5
+printf %s "checking whether strptime works... " >&6; }
 if test c${cross_compiling} = cno; then
-if test "$cross_compiling" = yes; then :
+if test "$cross_compiling" = yes
+then :
   eval "ac_cv_c_strptime_works=maybe"
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -16026,9 +17554,10 @@ res = strptime("20070207111842", "%Y%m%d%H%M%S", &tm);
 if (!res) return 1; return 0; }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   eval "ac_cv_c_strptime_works=yes"
-else
+else $as_nop
   eval "ac_cv_c_strptime_works=no"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -16038,8 +17567,8 @@ fi
 else
 eval "ac_cv_c_strptime_works=maybe"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_strptime_works" >&5
-$as_echo "$ac_cv_c_strptime_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_strptime_works" >&5
+printf "%s\n" "$ac_cv_c_strptime_works" >&6; }
 if test $ac_cv_c_strptime_works = no; then
 case " $LIBOBJS " in
   *" strptime.$ac_objext "* ) ;;
@@ -16049,13 +17578,11 @@ esac
 
 else
 
-cat >>confdefs.h <<_ACEOF
-#define STRPTIME_WORKS 1
-_ACEOF
+printf "%s\n" "#define STRPTIME_WORKS 1" >>confdefs.h
 
 fi
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" strptime.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS strptime.$ac_objext"
@@ -16063,8 +17590,8 @@ else
 esac
 
 fi
-done
 
+done
 
 # check if we can use SO_REUSEPORT
 reuseport_default=0
@@ -16072,11 +17599,11 @@ if echo "$host" | $GREP -i -e linux >/dev/null; then reuseport_default=1; fi
 if echo "$host" | $GREP -i -e dragonfly >/dev/null; then reuseport_default=1; fi
 if test "$reuseport_default" = 1; then
 
-$as_echo "#define REUSEPORT_DEFAULT 1" >>confdefs.h
+printf "%s\n" "#define REUSEPORT_DEFAULT 1" >>confdefs.h
 
 else
 
-$as_echo "#define REUSEPORT_DEFAULT 0" >>confdefs.h
+printf "%s\n" "#define REUSEPORT_DEFAULT 0" >>confdefs.h
 
 fi
 
@@ -16085,29 +17612,31 @@ fi
 #   Copyright 2015, Sami Kerola, CloudFlare.
 #   BSD licensed.
 # Check whether --enable-systemd was given.
-if test "${enable_systemd+set}" = set; then :
+if test ${enable_systemd+y}
+then :
   enableval=$enable_systemd;
-else
+else $as_nop
   enable_systemd=no
 fi
 
 have_systemd=no
-if test "x$enable_systemd" != xno; then :
+if test "x$enable_systemd" != xno
+then :
 
 
 
 pkg_failed=no
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for SYSTEMD" >&5
-$as_echo_n "checking for SYSTEMD... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SYSTEMD" >&5
+printf %s "checking for SYSTEMD... " >&6; }
 
 if test -n "$SYSTEMD_CFLAGS"; then
     pkg_cv_SYSTEMD_CFLAGS="$SYSTEMD_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libsystemd") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_SYSTEMD_CFLAGS=`$PKG_CONFIG --cflags "libsystemd" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -16121,10 +17650,10 @@ if test -n "$SYSTEMD_LIBS"; then
     pkg_cv_SYSTEMD_LIBS="$SYSTEMD_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libsystemd") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_SYSTEMD_LIBS=`$PKG_CONFIG --libs "libsystemd" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -16138,8 +17667,8 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
         _pkg_short_errors_supported=yes
@@ -16156,31 +17685,32 @@ fi
 
 	have_systemd=no
 elif test $pkg_failed = untried; then
-     	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	have_systemd=no
 else
 	SYSTEMD_CFLAGS=$pkg_cv_SYSTEMD_CFLAGS
 	SYSTEMD_LIBS=$pkg_cv_SYSTEMD_LIBS
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	have_systemd=yes
 fi
-		if test "x$have_systemd" != "xyes"; then :
+		if test "x$have_systemd" != "xyes"
+then :
 
 
 pkg_failed=no
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for SYSTEMD_DAEMON" >&5
-$as_echo_n "checking for SYSTEMD_DAEMON... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SYSTEMD_DAEMON" >&5
+printf %s "checking for SYSTEMD_DAEMON... " >&6; }
 
 if test -n "$SYSTEMD_DAEMON_CFLAGS"; then
     pkg_cv_SYSTEMD_DAEMON_CFLAGS="$SYSTEMD_DAEMON_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd-daemon\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd-daemon\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libsystemd-daemon") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_SYSTEMD_DAEMON_CFLAGS=`$PKG_CONFIG --cflags "libsystemd-daemon" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -16194,10 +17724,10 @@ if test -n "$SYSTEMD_DAEMON_LIBS"; then
     pkg_cv_SYSTEMD_DAEMON_LIBS="$SYSTEMD_DAEMON_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd-daemon\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libsystemd-daemon\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libsystemd-daemon") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_SYSTEMD_DAEMON_LIBS=`$PKG_CONFIG --libs "libsystemd-daemon" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -16211,8 +17741,8 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
         _pkg_short_errors_supported=yes
@@ -16229,17 +17759,18 @@ fi
 
 	have_systemd_daemon=no
 elif test $pkg_failed = untried; then
-     	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	have_systemd_daemon=no
 else
 	SYSTEMD_DAEMON_CFLAGS=$pkg_cv_SYSTEMD_DAEMON_CFLAGS
 	SYSTEMD_DAEMON_LIBS=$pkg_cv_SYSTEMD_DAEMON_LIBS
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	have_systemd_daemon=yes
 fi
-		if test "x$have_systemd_daemon" = "xyes"; then :
+		if test "x$have_systemd_daemon" = "xyes"
+then :
   have_systemd=yes
 fi
 
@@ -16249,7 +17780,7 @@ fi
     as_fn_error $? "systemd enabled but libsystemd not found" "$LINENO" 5 ;; #(
   *:yes) :
 
-$as_echo "#define HAVE_SYSTEMD 1" >>confdefs.h
+printf "%s\n" "#define HAVE_SYSTEMD 1" >>confdefs.h
 
 		LIBS="$LIBS $SYSTEMD_LIBS"
 
@@ -16273,28 +17804,31 @@ fi
 
 # set memory allocation checking if requested
 # Check whether --enable-alloc-checks was given.
-if test "${enable_alloc_checks+set}" = set; then :
+if test ${enable_alloc_checks+y}
+then :
   enableval=$enable_alloc_checks;
 fi
 
 # Check whether --enable-alloc-lite was given.
-if test "${enable_alloc_lite+set}" = set; then :
+if test ${enable_alloc_lite+y}
+then :
   enableval=$enable_alloc_lite;
 fi
 
 # Check whether --enable-alloc-nonregional was given.
-if test "${enable_alloc_nonregional+set}" = set; then :
+if test ${enable_alloc_nonregional+y}
+then :
   enableval=$enable_alloc_nonregional;
 fi
 
 if test x_$enable_alloc_nonregional = x_yes; then
 
-$as_echo "#define UNBOUND_ALLOC_NONREGIONAL 1" >>confdefs.h
+printf "%s\n" "#define UNBOUND_ALLOC_NONREGIONAL 1" >>confdefs.h
 
 fi
 if test x_$enable_alloc_checks = x_yes; then
 
-$as_echo "#define UNBOUND_ALLOC_STATS 1" >>confdefs.h
+printf "%s\n" "#define UNBOUND_ALLOC_STATS 1" >>confdefs.h
 
 	SLDNS_ALLOCCHECK_EXTRA_OBJ="alloc.lo log.lo"
 
@@ -16303,15 +17837,16 @@ $as_echo "#define UNBOUND_ALLOC_STATS 1" >>confdefs.h
 else
 	if test x_$enable_alloc_lite = x_yes; then
 
-$as_echo "#define UNBOUND_ALLOC_LITE 1" >>confdefs.h
+printf "%s\n" "#define UNBOUND_ALLOC_LITE 1" >>confdefs.h
 
 	else
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for GNU libc compatible malloc" >&5
-$as_echo_n "checking for GNU libc compatible malloc... " >&6; }
-	if test "$cross_compiling" = yes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no (crosscompile)" >&5
-$as_echo "no (crosscompile)" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GNU libc compatible malloc" >&5
+printf %s "checking for GNU libc compatible malloc... " >&6; }
+	if test "$cross_compiling" = yes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no (crosscompile)" >&5
+printf "%s\n" "no (crosscompile)" >&6; }
 	case " $LIBOBJS " in
   *" malloc.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS malloc.$ac_objext"
@@ -16319,11 +17854,9 @@ $as_echo "no (crosscompile)" >&6; }
 esac
 
 
-cat >>confdefs.h <<_ACEOF
-#define malloc rpl_malloc_unbound
-_ACEOF
+printf "%s\n" "#define malloc rpl_malloc_unbound" >>confdefs.h
 
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #if defined STDC_HEADERS || defined HAVE_STDLIB_H
@@ -16333,7 +17866,7 @@ char *malloc ();
 #endif
 
 int
-main ()
+main (void)
 {
  if(malloc(0) != 0) return 1;
   ;
@@ -16341,9 +17874,10 @@ main ()
 }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+if ac_fn_c_try_run "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	case " $LIBOBJS " in
   *" malloc.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS malloc.$ac_objext"
@@ -16351,15 +17885,13 @@ $as_echo "no" >&6; }
 esac
 
 
-cat >>confdefs.h <<_ACEOF
-#define malloc rpl_malloc_unbound
-_ACEOF
+printf "%s\n" "#define malloc rpl_malloc_unbound" >>confdefs.h
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_MALLOC 1" >>confdefs.h
+printf "%s\n" "#define HAVE_MALLOC 1" >>confdefs.h
 
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -16373,21 +17905,16 @@ fi
 # check windows threads (we use them, not pthreads, on windows).
 if test "$on_mingw" = "yes"; then
 # check windows threads
-	for ac_header in windows.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "windows.h" "ac_cv_header_windows_h" "$ac_includes_default
+	ac_fn_c_check_header_compile "$LINENO" "windows.h" "ac_cv_header_windows_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_windows_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_WINDOWS_H 1
-_ACEOF
+if test "x$ac_cv_header_windows_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_WINDOWS_H 1" >>confdefs.h
 
 fi
 
-done
-
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for CreateThread" >&5
-$as_echo_n "checking for CreateThread... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for CreateThread" >&5
+printf %s "checking for CreateThread... " >&6; }
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -16396,7 +17923,7 @@ $as_echo_n "checking for CreateThread... " >&6; }
 #endif
 
 int
-main ()
+main (void)
 {
 
 	HANDLE t = CreateThread(NULL, 0, NULL, NULL, 0, NULL);
@@ -16405,19 +17932,20 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+if ac_fn_c_try_compile "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_WINDOWS_THREADS 1" >>confdefs.h
+printf "%s\n" "#define HAVE_WINDOWS_THREADS 1" >>confdefs.h
 
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 else
 # not on mingw, check thread libraries.
@@ -16428,9 +17956,10 @@ else
 # the non-threadsafe C libraries.
 
 # Check whether --with-pthreads was given.
-if test "${with_pthreads+set}" = set; then :
+if test ${with_pthreads+y}
+then :
   withval=$with_pthreads;
-else
+else $as_nop
    withval="yes"
 fi
 
@@ -16438,6 +17967,8 @@ ub_have_pthreads=no
 if test x_$withval != x_no; then
 
 
+
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -16447,50 +17978,58 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 ax_pthread_ok=no
 
 # We used to check for pthread.h first, but this fails if pthread.h
-# requires special compiler flags (e.g. on True64 or Sequent).
+# requires special compiler flags (e.g. on Tru64 or Sequent).
 # It gets checked for in the link test anyway.
 
 # First of all, check if the user has set any of the PTHREAD_LIBS,
 # etcetera environment variables, and if threads linking works using
 # them:
-if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
-        save_CFLAGS="$CFLAGS"
+if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+        ax_pthread_save_CC="$CC"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
+        if test "x$PTHREAD_CC" != "x"
+then :
+  CC="$PTHREAD_CC"
+fi
+        if test "x$PTHREAD_CXX" != "x"
+then :
+  CXX="$PTHREAD_CXX"
+fi
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        save_LIBS="$LIBS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS" >&5
-$as_echo_n "checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
+printf %s "checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS... " >&6; }
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char pthread_join ();
 int
-main ()
+main (void)
 {
 return pthread_join ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ax_pthread_ok=yes
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
-$as_echo "$ax_pthread_ok" >&6; }
-        if test x"$ax_pthread_ok" = xno; then
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+printf "%s\n" "$ax_pthread_ok" >&6; }
+        if test "x$ax_pthread_ok" = "xno"; then
                 PTHREAD_LIBS=""
                 PTHREAD_CFLAGS=""
         fi
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CC="$ax_pthread_save_CC"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 fi
 
 # We must check for the threads library under a number of different
@@ -16498,12 +18037,14 @@ fi
 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
 # libraries is broken (non-POSIX).
 
-# Create a list of thread flags to try.  Items starting with a "-" are
-# C compiler flags, and other items are library names, except for "none"
-# which indicates that we try without any flags at all, and "pthread-config"
-# which is a program returning the flags for the Pth emulation library.
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
 
-ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
 
 # The ordering *is* (sometimes) important.  Some notes on the
 # individual items follow:
@@ -16512,92 +18053,189 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt
 # none: in case threads are in libc; should be tried before -Kthread and
 #       other compiler flags to prevent continual compiler warnings
 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
-# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
-# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
-# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
-# -pthreads: Solaris/gcc
-# -mthreads: Mingw32/gcc, Lynx/gcc
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+#           (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
-#      doesn't hurt to check since this sometimes defines pthreads too;
-#      also defines -D_REENTRANT)
-#      ... -mt is also the pthreads flag for HP/aCC
+#      doesn't hurt to check since this sometimes defines pthreads and
+#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
+#      is present but should not be used directly; and before -mthreads,
+#      because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
 # pthread: Linux, etcetera
 # --thread-safe: KAI C++
 # pthread-config: use pthread-config program (for GNU Pth library)
 
-case ${host_os} in
+case $host_os in
+
+        freebsd*)
+
+        # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+        # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+
+        ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+        ;;
+
+        hpux*)
+
+        # From the cc(1) man page: "[-mt] Sets various -D flags to enable
+        # multi-threading and also sets -lpthread."
+
+        ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+        ;;
+
+        openedition*)
+
+        # IBM z/OS requires a feature-test macro to be defined in order to
+        # enable POSIX threads at all, so give the user a hint if this is
+        # not set. (We don't define these ourselves, as they can affect
+        # other portions of the system API in unpredictable ways.)
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+             AX_PTHREAD_ZOS_MISSING
+#            endif
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "AX_PTHREAD_ZOS_MISSING" >/dev/null 2>&1
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
+printf "%s\n" "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
+fi
+rm -rf conftest*
+
+        ;;
+
         solaris*)
 
         # On Solaris (at least, for some versions), libc contains stubbed
         # (non-functional) versions of the pthreads routines, so link-based
-        # tests will erroneously succeed.  (We need to link with -pthreads/-mt/
-        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
-        # a function called by this macro, so we could check for that, but
-        # who knows whether they'll stub that too in a future libc.)  So,
-        # we'll just look for -pthreads and -lpthread first:
-
-        ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
-        ;;
+        # tests will erroneously succeed. (N.B.: The stubs are missing
+        # pthread_cleanup_push, or rather a function called by this macro,
+        # so we could check for that, but who knows whether they'll stub
+        # that too in a future libc.)  So we'll check first for the
+        # standard Solaris way of linking pthreads (-mt -lpthread).
 
-        darwin*)
-        ax_pthread_flags="-pthread $ax_pthread_flags"
+        ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
         ;;
 esac
 
-# Clang doesn't consider unrecognized options an error unless we specify
-# -Werror. We throw in some extra Clang-specific options to ensure that
-# this doesn't happen for GCC, which also accepts -Werror.
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler needs -Werror to reject unknown flags" >&5
-$as_echo_n "checking if compiler needs -Werror to reject unknown flags... " >&6; }
-save_CFLAGS="$CFLAGS"
-ax_pthread_extra_flags="-Werror"
-CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+# Are we compiling with Clang?
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC is Clang" >&5
+printf %s "checking whether $CC is Clang... " >&6; }
+if test ${ax_cv_PTHREAD_CLANG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ax_cv_PTHREAD_CLANG=no
+     # Note that Autoconf sets GCC=yes for Clang as well as GCC
+     if test "x$GCC" = "xyes"; then
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-int foo(void);
-int
-main ()
-{
-foo()
-  ;
-  return 0;
-}
+/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+#            if defined(__clang__) && defined(__llvm__)
+             AX_PTHREAD_CC_IS_CLANG
+#            endif
+
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
-  ax_pthread_extra_flags=
-                   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "AX_PTHREAD_CC_IS_CLANG" >/dev/null 2>&1
+then :
+  ax_cv_PTHREAD_CLANG=yes
+fi
+rm -rf conftest*
+
+     fi
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG" >&5
+printf "%s\n" "$ax_cv_PTHREAD_CLANG" >&6; }
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
+
+if test "x$GCC" = "xyes"
+then :
+  ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"
+fi
+
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
+
+if test "x$ax_pthread_clang" = "xyes"
+then :
+  ax_pthread_flags="-pthread,-lpthread -pthread"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-CFLAGS="$save_CFLAGS"
 
-if test x"$ax_pthread_ok" = xno; then
-for flag in $ax_pthread_flags; do
 
-        case $flag in
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+
+case $host_os in
+        darwin* | hpux* | linux* | osf* | solaris*)
+        ax_pthread_check_macro="_REENTRANT"
+        ;;
+
+        aix*)
+        ax_pthread_check_macro="_THREAD_SAFE"
+        ;;
+
+        *)
+        ax_pthread_check_macro="--"
+        ;;
+esac
+if test "x$ax_pthread_check_macro" = "x--"
+then :
+  ax_pthread_check_cond=0
+else $as_nop
+  ax_pthread_check_cond="!defined($ax_pthread_check_macro)"
+fi
+
+
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+
+        case $ax_pthread_try_flag in
                 none)
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
-$as_echo_n "checking whether pthreads work without any flags... " >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work without any flags" >&5
+printf %s "checking whether pthreads work without any flags... " >&6; }
+                ;;
+
+                *,*)
+                PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+                PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"" >&5
+printf %s "checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"... " >&6; }
                 ;;
 
                 -*)
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $flag" >&5
-$as_echo_n "checking whether pthreads work with $flag... " >&6; }
-                PTHREAD_CFLAGS="$flag"
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $ax_pthread_try_flag" >&5
+printf %s "checking whether pthreads work with $ax_pthread_try_flag... " >&6; }
+                PTHREAD_CFLAGS="$ax_pthread_try_flag"
                 ;;
 
                 pthread-config)
                 # Extract the first word of "pthread-config", so it can be a program name with args.
 set dummy pthread-config; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ax_pthread_config+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ax_pthread_config+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ax_pthread_config"; then
   ac_cv_prog_ax_pthread_config="$ax_pthread_config" # Let the user override the test.
 else
@@ -16605,11 +18243,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ax_pthread_config="yes"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16621,30 +18263,33 @@ fi
 fi
 ax_pthread_config=$ac_cv_prog_ax_pthread_config
 if test -n "$ax_pthread_config"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
-$as_echo "$ax_pthread_config" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_config" >&5
+printf "%s\n" "$ax_pthread_config" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
-                if test x"$ax_pthread_config" = xno; then continue; fi
+                if test "x$ax_pthread_config" = "xno"
+then :
+  continue
+fi
                 PTHREAD_CFLAGS="`pthread-config --cflags`"
                 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
                 ;;
 
                 *)
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$flag" >&5
-$as_echo_n "checking for the pthreads library -l$flag... " >&6; }
-                PTHREAD_LIBS="-l$flag"
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for the pthreads library -l$ax_pthread_try_flag" >&5
+printf %s "checking for the pthreads library -l$ax_pthread_try_flag... " >&6; }
+                PTHREAD_LIBS="-l$ax_pthread_try_flag"
                 ;;
         esac
 
-        save_LIBS="$LIBS"
-        save_CFLAGS="$CFLAGS"
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
+        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
         LIBS="$PTHREAD_LIBS $LIBS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags"
 
         # Check for various functions.  We must include pthread.h,
         # since some functions may be macros.  (On the Sequent, we
@@ -16655,13 +18300,23 @@ $as_echo_n "checking for the pthreads library -l$flag... " >&6; }
         # pthread_cleanup_push because it is one of the few pthread
         # functions on Solaris that doesn't have a non-functional libc stub.
         # We try pthread_create on general principles.
+
         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>
-                        static void routine(void *a) { *((int*)a) = 0; }
+#                       if $ax_pthread_check_cond
+#                        error "$ax_pthread_check_macro must be defined"
+#                       endif
+                        static void *some_global = NULL;
+                        static void routine(void *a)
+                          {
+                             /* To avoid any unused-parameter or
+                                unused-but-set-parameter warning.  */
+                             some_global = a;
+                          }
                         static void *start_routine(void *a) { return a; }
 int
-main ()
+main (void)
 {
 pthread_t th; pthread_attr_t attr;
                         pthread_create(&th, 0, start_routine, 0);
@@ -16673,145 +18328,280 @@ pthread_t th; pthread_attr_t attr;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ax_pthread_ok=yes
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
-$as_echo "$ax_pthread_ok" >&6; }
-        if test "x$ax_pthread_ok" = xyes; then
-                break;
-        fi
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_pthread_ok" >&5
+printf "%s\n" "$ax_pthread_ok" >&6; }
+        if test "x$ax_pthread_ok" = "xyes"
+then :
+  break
+fi
 
         PTHREAD_LIBS=""
         PTHREAD_CFLAGS=""
 done
 fi
 
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+        # Clang takes -pthread; it has never supported any other flag
+
+        # (Note 1: This will need to be revisited if a system that Clang
+        # supports has POSIX threads in a separate library.  This tends not
+        # to be the way of modern systems, but it's conceivable.)
+
+        # (Note 2: On some systems, notably Darwin, -pthread is not needed
+        # to get POSIX threads support; the API is always present and
+        # active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
+        # -pthread does define _REENTRANT, and while the Darwin headers
+        # ignore this macro, third-party headers might not.)
+
+        # However, older versions of Clang make a point of warning the user
+        # that, in an invocation where only linking and no compilation is
+        # taking place, the -pthread option has no effect ("argument unused
+        # during compilation").  They expect -pthread to be passed in only
+        # when source code is being compiled.
+        #
+        # Problem is, this is at odds with the way Automake and most other
+        # C build frameworks function, which is that the same flags used in
+        # compilation (CFLAGS) are also used in linking.  Many systems
+        # supported by AX_PTHREAD require exactly this for POSIX threads
+        # support, and in fact it is often not straightforward to specify a
+        # flag that is used only in the compilation phase and not in
+        # linking.  Such a scenario is extremely rare in practice.
+        #
+        # Even though use of the -pthread flag in linking would only print
+        # a warning, this can be a nuisance for well-run software projects
+        # that build with -Werror.  So if the active version of Clang has
+        # this misfeature, we search for an option to squash it.
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
+printf %s "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
+if test ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+             # Create an alternate version of $ac_link that compiles and
+             # links in two steps (.c -> .o, .o -> exe) instead of one
+             # (.c -> exe), because the warning occurs only in the second
+             # step
+             ax_pthread_save_ac_link="$ac_link"
+             ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+             ax_pthread_link_step=`printf "%s\n" "$ac_link" | sed "$ax_pthread_sed"`
+             ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+             ax_pthread_save_CFLAGS="$CFLAGS"
+             for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+                if test "x$ax_pthread_try" = "xunknown"
+then :
+  break
+fi
+                CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+                ac_link="$ax_pthread_save_ac_link"
+                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_link="$ax_pthread_2step_ac_link"
+                     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+             done
+             ac_link="$ax_pthread_save_ac_link"
+             CFLAGS="$ax_pthread_save_CFLAGS"
+             if test "x$ax_pthread_try" = "x"
+then :
+  ax_pthread_try=no
+fi
+             ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
+printf "%s\n" "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
+
+        case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+                no | unknown) ;;
+                *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+        esac
+
+fi # $ax_pthread_clang = yes
+
+
+
 # Various other checks:
-if test "x$ax_pthread_ok" = xyes; then
-        save_LIBS="$LIBS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        save_CFLAGS="$CFLAGS"
+if test "x$ax_pthread_ok" = "xyes"; then
+        ax_pthread_save_CFLAGS="$CFLAGS"
+        ax_pthread_save_LIBS="$LIBS"
         CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+        LIBS="$PTHREAD_LIBS $LIBS"
 
         # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
-$as_echo_n "checking for joinable pthread attribute... " >&6; }
-        attr_name=unknown
-        for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
-            cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
+printf %s "checking for joinable pthread attribute... " >&6; }
+if test ${ax_cv_PTHREAD_JOINABLE_ATTR+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+             for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>
 int
-main ()
+main (void)
 {
-int attr = $attr; return attr /* ; */
+int attr = $ax_pthread_attr; return attr /* ; */
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  attr_name=$attr; break
+if ac_fn_c_try_link "$LINENO"
+then :
+  ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-        done
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $attr_name" >&5
-$as_echo "$attr_name" >&6; }
-        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
+             done
 
-cat >>confdefs.h <<_ACEOF
-#define PTHREAD_CREATE_JOINABLE $attr_name
-_ACEOF
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
+printf "%s\n" "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
+        if test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+               test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+               test "x$ax_pthread_joinable_attr_defined" != "xyes"
+then :
 
-        fi
+printf "%s\n" "#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR" >>confdefs.h
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if more special flags are required for pthreads" >&5
-$as_echo_n "checking if more special flags are required for pthreads... " >&6; }
-        flag=no
-        case ${host_os} in
-            aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;
-            osf* | hpux*) flag="-D_REENTRANT";;
-            solaris*)
-            if test "$GCC" = "yes"; then
-                flag="-D_REENTRANT"
-            else
-                # TODO: What about Clang on Solaris?
-                flag="-mt -D_REENTRANT"
-            fi
-            ;;
-        esac
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $flag" >&5
-$as_echo "$flag" >&6; }
-        if test "x$flag" != xno; then
-            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
-        fi
+               ax_pthread_joinable_attr_defined=yes
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
-$as_echo_n "checking for PTHREAD_PRIO_INHERIT... " >&6; }
-if ${ax_cv_PTHREAD_PRIO_INHERIT+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+fi
 
-                cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether more special flags are required for pthreads" >&5
+printf %s "checking whether more special flags are required for pthreads... " >&6; }
+if test ${ax_cv_PTHREAD_SPECIAL_FLAGS+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ax_cv_PTHREAD_SPECIAL_FLAGS=no
+             case $host_os in
+             solaris*)
+             ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+             ;;
+             esac
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
+printf "%s\n" "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
+        if test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+               test "x$ax_pthread_special_flags_added" != "xyes"
+then :
+  PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+               ax_pthread_special_flags_added=yes
+fi
+
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
+printf %s "checking for PTHREAD_PRIO_INHERIT... " >&6; }
+if test ${ax_cv_PTHREAD_PRIO_INHERIT+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>
 int
-main ()
+main (void)
 {
 int i = PTHREAD_PRIO_INHERIT;
+                                               return i;
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ax_cv_PTHREAD_PRIO_INHERIT=yes
-else
+else $as_nop
   ax_cv_PTHREAD_PRIO_INHERIT=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
-$as_echo "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
-        if test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_PRIO_INHERIT" >&5
+printf "%s\n" "$ax_cv_PTHREAD_PRIO_INHERIT" >&6; }
+        if test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+               test "x$ax_pthread_prio_inherit_defined" != "xyes"
+then :
+
+printf "%s\n" "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
 
-$as_echo "#define HAVE_PTHREAD_PRIO_INHERIT 1" >>confdefs.h
+               ax_pthread_prio_inherit_defined=yes
 
 fi
 
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
+        CFLAGS="$ax_pthread_save_CFLAGS"
+        LIBS="$ax_pthread_save_LIBS"
 
         # More AIX lossage: compile with *_r variant
-        if test "x$GCC" != xyes; then
+        if test "x$GCC" != "xyes"; then
             case $host_os in
                 aix*)
                 case "x/$CC" in #(
   x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6) :
     #handle absolute path differently from PATH based program lookup
-                   case "x$CC" in #(
+                     case "x$CC" in #(
   x/*) :
-    if as_fn_executable_p ${CC}_r; then :
+
+			   if as_fn_executable_p ${CC}_r
+then :
   PTHREAD_CC="${CC}_r"
-fi ;; #(
+fi
+			   if test "x${CXX}" != "x"
+then :
+  if as_fn_executable_p ${CXX}_r
+then :
+  PTHREAD_CXX="${CXX}_r"
+fi
+fi
+			  ;; #(
   *) :
-    for ac_prog in ${CC}_r
+
+			   for ac_prog in ${CC}_r
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_PTHREAD_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_PTHREAD_CC+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$PTHREAD_CC"; then
   ac_cv_prog_PTHREAD_CC="$PTHREAD_CC" # Let the user override the test.
 else
@@ -16819,11 +18609,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_PTHREAD_CC="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -16834,19 +18628,73 @@ fi
 fi
 PTHREAD_CC=$ac_cv_prog_PTHREAD_CC
 if test -n "$PTHREAD_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
-$as_echo "$PTHREAD_CC" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CC" >&5
+printf "%s\n" "$PTHREAD_CC" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
   test -n "$PTHREAD_CC" && break
 done
 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
- ;;
-esac ;; #(
+
+			   if test "x${CXX}" != "x"
+then :
+  for ac_prog in ${CXX}_r
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_PTHREAD_CXX+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if test -n "$PTHREAD_CXX"; then
+  ac_cv_prog_PTHREAD_CXX="$PTHREAD_CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_prog_PTHREAD_CXX="$ac_prog"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+PTHREAD_CXX=$ac_cv_prog_PTHREAD_CXX
+if test -n "$PTHREAD_CXX"; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CXX" >&5
+printf "%s\n" "$PTHREAD_CXX" >&6; }
+else
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+fi
+
+
+  test -n "$PTHREAD_CXX" && break
+done
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
+fi
+
+                      ;;
+esac
+                     ;; #(
   *) :
      ;;
 esac
@@ -16856,16 +18704,18 @@ esac
 fi
 
 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
 
 
 
 
 
 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test x"$ax_pthread_ok" = xyes; then
+if test "x$ax_pthread_ok" = "xyes"; then
 
 
-$as_echo "#define HAVE_PTHREAD 1" >>confdefs.h
+printf "%s\n" "#define HAVE_PTHREAD 1" >>confdefs.h
 
 		if test -n "$PTHREAD_LIBS"; then
 		  LIBS="$PTHREAD_LIBS $LIBS"
@@ -16875,21 +18725,19 @@ $as_echo "#define HAVE_PTHREAD 1" >>confdefs.h
 		ub_have_pthreads=yes
 		ac_fn_c_check_type "$LINENO" "pthread_spinlock_t" "ac_cv_type_pthread_spinlock_t" "#include <pthread.h>
 "
-if test "x$ac_cv_type_pthread_spinlock_t" = xyes; then :
+if test "x$ac_cv_type_pthread_spinlock_t" = xyes
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_PTHREAD_SPINLOCK_T 1
-_ACEOF
+printf "%s\n" "#define HAVE_PTHREAD_SPINLOCK_T 1" >>confdefs.h
 
 
 fi
 ac_fn_c_check_type "$LINENO" "pthread_rwlock_t" "ac_cv_type_pthread_rwlock_t" "#include <pthread.h>
 "
-if test "x$ac_cv_type_pthread_rwlock_t" = xyes; then :
+if test "x$ac_cv_type_pthread_rwlock_t" = xyes
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_PTHREAD_RWLOCK_T 1
-_ACEOF
+printf "%s\n" "#define HAVE_PTHREAD_RWLOCK_T 1" >>confdefs.h
 
 
 fi
@@ -16898,17 +18746,19 @@ fi
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of unsigned long" >&5
-$as_echo_n "checking size of unsigned long... " >&6; }
-if ${ac_cv_sizeof_unsigned_long+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (unsigned long))" "ac_cv_sizeof_unsigned_long"        "$ac_includes_default"; then :
-
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of unsigned long" >&5
+printf %s "checking size of unsigned long... " >&6; }
+if test ${ac_cv_sizeof_unsigned_long+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (unsigned long))" "ac_cv_sizeof_unsigned_long"        "$ac_includes_default"
+then :
+
+else $as_nop
   if test "$ac_cv_type_unsigned_long" = yes; then
-     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (unsigned long)
 See \`config.log' for more details" "$LINENO" 5; }
    else
@@ -16917,31 +18767,31 @@ See \`config.log' for more details" "$LINENO" 5; }
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_unsigned_long" >&5
-$as_echo "$ac_cv_sizeof_unsigned_long" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_unsigned_long" >&5
+printf "%s\n" "$ac_cv_sizeof_unsigned_long" >&6; }
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SIZEOF_UNSIGNED_LONG $ac_cv_sizeof_unsigned_long
-_ACEOF
+printf "%s\n" "#define SIZEOF_UNSIGNED_LONG $ac_cv_sizeof_unsigned_long" >>confdefs.h
 
 
 		# The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
 # This bug is HP SR number 8606223364.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of pthread_t" >&5
-$as_echo_n "checking size of pthread_t... " >&6; }
-if ${ac_cv_sizeof_pthread_t+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (pthread_t))" "ac_cv_sizeof_pthread_t"        "$ac_includes_default"; then :
-
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking size of pthread_t" >&5
+printf %s "checking size of pthread_t... " >&6; }
+if test ${ac_cv_sizeof_pthread_t+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (pthread_t))" "ac_cv_sizeof_pthread_t"        "$ac_includes_default"
+then :
+
+else $as_nop
   if test "$ac_cv_type_pthread_t" = yes; then
-     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+     { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
 as_fn_error 77 "cannot compute sizeof (pthread_t)
 See \`config.log' for more details" "$LINENO" 5; }
    else
@@ -16950,20 +18800,18 @@ See \`config.log' for more details" "$LINENO" 5; }
 fi
 
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_pthread_t" >&5
-$as_echo "$ac_cv_sizeof_pthread_t" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_pthread_t" >&5
+printf "%s\n" "$ac_cv_sizeof_pthread_t" >&6; }
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SIZEOF_PTHREAD_T $ac_cv_sizeof_pthread_t
-_ACEOF
+printf "%s\n" "#define SIZEOF_PTHREAD_T $ac_cv_sizeof_pthread_t" >>confdefs.h
 
 
 
 		if echo "$CFLAGS" | $GREP -e "-pthread" >/dev/null; then
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if -pthread unused during linking" >&5
-$as_echo_n "checking if -pthread unused during linking... " >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -pthread unused during linking" >&5
+printf %s "checking if -pthread unused during linking... " >&6; }
 		# catch clang warning 'argument unused during compilation'
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -16981,18 +18829,18 @@ _ACEOF
 			echo "$CC $CFLAGS -Werror $LDFLAGS $LIBS -o conftest contest.o" >&5
 			$CC $CFLAGS -Werror $LDFLAGS $LIBS -o conftest conftest.o 2>&5 >&5
 			if test $? -ne 0; then
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 				CFLAGS=`echo "$CFLAGS" | sed -e 's/-pthread//'`
 				PTHREAD_CFLAGS_ONLY="-pthread"
 
 			else
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 			fi
 		else
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 		fi # endif cc successful
 		rm -f conftest conftest.c conftest.o
 		fi # endif -pthread in CFLAGS
@@ -17015,23 +18863,25 @@ fi
 # check solaris thread library
 
 # Check whether --with-solaris-threads was given.
-if test "${with_solaris_threads+set}" = set; then :
+if test ${with_solaris_threads+y}
+then :
   withval=$with_solaris_threads;
-else
+else $as_nop
    withval="no"
 fi
 
 ub_have_sol_threads=no
 if test x_$withval != x_no; then
 	if test x_$ub_have_pthreads != x_no; then
-	    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Have pthreads already, ignoring --with-solaris-threads" >&5
-$as_echo "$as_me: WARNING: Have pthreads already, ignoring --with-solaris-threads" >&2;}
+	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Have pthreads already, ignoring --with-solaris-threads" >&5
+printf "%s\n" "$as_me: WARNING: Have pthreads already, ignoring --with-solaris-threads" >&2;}
 	else
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing thr_create" >&5
-$as_echo_n "checking for library containing thr_create... " >&6; }
-if ${ac_cv_search_thr_create+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing thr_create" >&5
+printf %s "checking for library containing thr_create... " >&6; }
+if test ${ac_cv_search_thr_create+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -17039,60 +18889,63 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char thr_create ();
 int
-main ()
+main (void)
 {
 return thr_create ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' thread; do
+for ac_lib in '' thread
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_thr_create=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_thr_create+:} false; then :
+  if test ${ac_cv_search_thr_create+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_thr_create+:} false; then :
+if test ${ac_cv_search_thr_create+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_thr_create=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_thr_create" >&5
-$as_echo "$ac_cv_search_thr_create" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_thr_create" >&5
+printf "%s\n" "$ac_cv_search_thr_create" >&6; }
 ac_res=$ac_cv_search_thr_create
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 
-$as_echo "#define HAVE_SOLARIS_THREADS 1" >>confdefs.h
+printf "%s\n" "#define HAVE_SOLARIS_THREADS 1" >>confdefs.h
 
 
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -mt" >&5
-$as_echo_n "checking whether $CC supports -mt... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $CC supports -mt" >&5
+printf %s "checking whether $CC supports -mt... " >&6; }
 cache=`echo mt | sed 'y%.=/+-%___p_%'`
-if eval \${cv_prog_cc_flag_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_prog_cc_flag_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo 'void f(void){}' >conftest.c
 if test -z "`$CC $CPPFLAGS $CFLAGS -mt -c conftest.c 2>&1`"; then
@@ -17105,20 +18958,20 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_prog_cc_flag_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 :
 CFLAGS="$CFLAGS -mt"
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 CFLAGS="$CFLAGS -D_REENTRANT"
 fi
 
 		ub_have_sol_threads=yes
 
-else
+else $as_nop
 
 		as_fn_error $? "no solaris threads found." "$LINENO" 5
 
@@ -17132,7 +18985,8 @@ fi # end of non-mingw check of thread libraries
 # Check for SYSLOG_FACILITY
 
 # Check whether --with-syslog-facility was given.
-if test "${with_syslog_facility+set}" = set; then :
+if test ${with_syslog_facility+y}
+then :
   withval=$with_syslog_facility;  UNBOUND_SYSLOG_FACILITY="$withval"
 fi
 
@@ -17144,24 +18998,23 @@ case "${UNBOUND_SYSLOG_FACILITY}" in
 
 esac
 
-cat >>confdefs.h <<_ACEOF
-#define UB_SYSLOG_FACILITY ${UNBOUND_SYSLOG_FACILITY}
-_ACEOF
+printf "%s\n" "#define UB_SYSLOG_FACILITY ${UNBOUND_SYSLOG_FACILITY}" >>confdefs.h
 
 
 # Check for dynamic library module
 
 # Check whether --with-dynlibmodule was given.
-if test "${with_dynlibmodule+set}" = set; then :
+if test ${with_dynlibmodule+y}
+then :
   withval=$with_dynlibmodule;
-else
+else $as_nop
    withval="no"
 fi
 
 
 if test x_$withval != x_no; then
 
-$as_echo "#define WITH_DYNLIBMODULE 1" >>confdefs.h
+printf "%s\n" "#define WITH_DYNLIBMODULE 1" >>confdefs.h
 
   WITH_DYNLIBMODULE=yes
 
@@ -17173,11 +19026,12 @@ $as_echo "#define WITH_DYNLIBMODULE 1" >>confdefs.h
     # link with -ldl if not already there, for all executables because
     # dlopen call is in the dynlib module.  For unbound executable, also
     # export symbols.
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
-$as_echo_n "checking for library containing dlopen... " >&6; }
-if ${ac_cv_search_dlopen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+printf %s "checking for library containing dlopen... " >&6; }
+if test ${ac_cv_search_dlopen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -17185,46 +19039,48 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dlopen ();
 int
-main ()
+main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' dl; do
+for ac_lib in '' dl
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_dlopen=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_dlopen+:} false; then :
+  if test ${ac_cv_search_dlopen+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_dlopen+:} false; then :
+if test ${ac_cv_search_dlopen+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_dlopen=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
-$as_echo "$ac_cv_search_dlopen" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+printf "%s\n" "$ac_cv_search_dlopen" >&6; }
 ac_res=$ac_cv_search_dlopen
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -17239,9 +19095,10 @@ fi
 # Check for PyUnbound
 
 # Check whether --with-pyunbound was given.
-if test "${with_pyunbound+set}" = set; then :
+if test ${with_pyunbound+y}
+then :
   withval=$with_pyunbound;
-else
+else $as_nop
    withval="no"
 fi
 
@@ -17256,9 +19113,10 @@ fi
 # Check for Python module
 
 # Check whether --with-pythonmodule was given.
-if test "${with_pythonmodule+set}" = set; then :
+if test ${with_pythonmodule+y}
+then :
   withval=$with_pythonmodule;
-else
+else $as_nop
    withval="no"
 fi
 
@@ -17282,11 +19140,12 @@ if test x_$ub_test_python != x_no; then
 
         # Extract the first word of "python[$PYTHON_VERSION]", so it can be a program name with args.
 set dummy python$PYTHON_VERSION; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_PYTHON+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_PYTHON+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $PYTHON in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PYTHON="$PYTHON" # Let the user override the test with a path.
@@ -17296,11 +19155,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_PYTHON="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_PYTHON="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -17312,11 +19175,11 @@ esac
 fi
 PYTHON=$ac_cv_path_PYTHON
 if test -n "$PYTHON"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON" >&5
-$as_echo "$PYTHON" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PYTHON" >&5
+printf "%s\n" "$PYTHON" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -17358,29 +19221,29 @@ fi
 	# Check if you have the first module
 	if test "$py_distutils_first" = "yes"; then m="distutils"; else m="sysconfig"; fi
 	sysconfig_module=""
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the $m Python module" >&5
-$as_echo_n "checking for the $m Python module... " >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for the $m Python module" >&5
+printf %s "checking for the $m Python module... " >&6; }
         if ac_modulecheck_result1=`$PYTHON -c "import $m" 2>&1`; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 		sysconfig_module="$m"
 	else
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	fi
 
 	# if not found, try the other one.
 	if test -z "$sysconfig_module"; then
 		if test "$py_distutils_first" = "yes"; then m2="sysconfig"; else m2="distutils"; fi
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the $m2 Python module" >&5
-$as_echo_n "checking for the $m2 Python module... " >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for the $m2 Python module" >&5
+printf %s "checking for the $m2 Python module... " >&6; }
 		if ac_modulecheck_result2=`$PYTHON -c "import $m2" 2>&1`; then
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 			sysconfig_module="$m2"
 		else
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 			as_fn_error $? "cannot import Python module \"$m\", or \"$m2\".
 	Please check your Python installation. The errors are:
 	$m
@@ -17395,8 +19258,8 @@ $as_echo "no" >&6; }
         #
         # Check for Python include path
         #
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Python include path" >&5
-$as_echo_n "checking for Python include path... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Python include path" >&5
+printf %s "checking for Python include path... " >&6; }
         if test -z "$PYTHON_CPPFLAGS"; then
 		if test "$sysconfig_module" = "sysconfig"; then
 			python_path=`$PYTHON -c 'import sysconfig; \
@@ -17410,21 +19273,21 @@ $as_echo_n "checking for Python include path... " >&6; }
                 fi
                 PYTHON_CPPFLAGS=$python_path
         fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON_CPPFLAGS" >&5
-$as_echo "$PYTHON_CPPFLAGS" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PYTHON_CPPFLAGS" >&5
+printf "%s\n" "$PYTHON_CPPFLAGS" >&6; }
 
 
         #
         # Check for Python library path
         #
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Python library path" >&5
-$as_echo_n "checking for Python library path... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Python library path" >&5
+printf %s "checking for Python library path... " >&6; }
         if test -z "$PYTHON_LDFLAGS"; then
                 PYTHON_LDFLAGS=`$PYTHON -c "from $sysconfig_module import *; \
                         print('-L'+get_config_var('LIBDIR')+' -L'+get_config_var('LIBDEST')+' '+get_config_var('BLDLIBRARY'));"`
         fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON_LDFLAGS" >&5
-$as_echo "$PYTHON_LDFLAGS" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PYTHON_LDFLAGS" >&5
+printf "%s\n" "$PYTHON_LDFLAGS" >&6; }
 
 
         if test -z "$PYTHON_LIBDIR"; then
@@ -17435,8 +19298,8 @@ $as_echo "$PYTHON_LDFLAGS" >&6; }
         #
         # Check for site packages
         #
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Python site-packages path" >&5
-$as_echo_n "checking for Python site-packages path... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for Python site-packages path" >&5
+printf %s "checking for Python site-packages path... " >&6; }
         if test -z "$PYTHON_SITE_PKG"; then
 		if test "$sysconfig_module" = "sysconfig"; then
 			PYTHON_SITE_PKG=`$PYTHON -c 'import sysconfig; \
@@ -17446,15 +19309,15 @@ $as_echo_n "checking for Python site-packages path... " >&6; }
 				print(distutils.sysconfig.get_python_lib(1,0));"`
 		fi
         fi
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PYTHON_SITE_PKG" >&5
-$as_echo "$PYTHON_SITE_PKG" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PYTHON_SITE_PKG" >&5
+printf "%s\n" "$PYTHON_SITE_PKG" >&6; }
 
 
         #
         # final check to see if everything compiles alright
         #
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking consistency of all components of python development environment" >&5
-$as_echo_n "checking consistency of all components of python development environment... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking consistency of all components of python development environment" >&5
+printf %s "checking consistency of all components of python development environment... " >&6; }
         ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -17473,7 +19336,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
                 #include <Python.h>
 
 int
-main ()
+main (void)
 {
 
                 Py_Initialize();
@@ -17482,16 +19345,17 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   pythonexists=yes
-else
+else $as_nop
   pythonexists=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: $pythonexists" >&5
-$as_echo "$pythonexists" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $pythonexists" >&5
+printf "%s\n" "$pythonexists" >&6; }
 
         if test ! "$pythonexists" = "yes"; then
            as_fn_error $? "
@@ -17537,7 +19401,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
       # Have Python
 
-$as_echo "#define HAVE_PYTHON 1" >>confdefs.h
+printf "%s\n" "#define HAVE_PYTHON 1" >>confdefs.h
 
       if test x_$ub_with_pythonmod != x_no; then
         if test -n "$LIBS"; then
@@ -17564,10 +19428,10 @@ $as_echo "#define HAVE_PYTHON 1" >>confdefs.h
       fi
       ub_have_python=yes
       if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\"python\${PY_MAJOR_VERSION}\"\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\"python\${PY_MAJOR_VERSION}\"\""; } >&5
   ($PKG_CONFIG --exists --print-errors ""python${PY_MAJOR_VERSION}"") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   PC_PY_DEPENDENCY="python${PY_MAJOR_VERSION}"
 else
@@ -17578,19 +19442,24 @@ fi
       # Check for SWIG
       ub_have_swig=no
       # Check whether --enable-swig-version-check was given.
-if test "${enable_swig_version_check+set}" = set; then :
+if test ${enable_swig_version_check+y}
+then :
   enableval=$enable_swig_version_check;
 fi
 
       if test "$enable_swig_version_check" = "yes"; then
 
-        # Extract the first word of "swig", so it can be a program name with args.
-set dummy swig; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_SWIG+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+        # Find path to the "swig" executable.
+        for ac_prog in swig swig3.0 swig2.0
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_SWIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $SWIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SWIG="$SWIG" # Let the user override the test with a path.
@@ -17600,11 +19469,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_SWIG="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_SWIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -17616,24 +19489,27 @@ esac
 fi
 SWIG=$ac_cv_path_SWIG
 if test -n "$SWIG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SWIG" >&5
-$as_echo "$SWIG" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SWIG" >&5
+printf "%s\n" "$SWIG" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
+  test -n "$SWIG" && break
+done
+
         if test -z "$SWIG" ; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot find 'swig' program. You should look at http://www.swig.org" >&5
-$as_echo "$as_me: WARNING: cannot find 'swig' program. You should look at http://www.swig.org" >&2;}
-                SWIG='echo "Error: SWIG is not installed. You should look at http://www.swig.org" ; false'
-        elif test -n "2.0.1" ; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SWIG version" >&5
-$as_echo_n "checking for SWIG version... " >&6; }
+                :
+        elif test -z "2.0.1" ; then
+                :
+	else
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SWIG version" >&5
+printf %s "checking SWIG version... " >&6; }
                 swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $swig_version" >&5
-$as_echo "$swig_version" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $swig_version" >&5
+printf "%s\n" "$swig_version" >&6; }
                 if test -n "$swig_version" ; then
                         # Calculate the required version number components
                         required=2.0.1
@@ -17641,12 +19517,12 @@ $as_echo "$swig_version" >&6; }
                         if test -z "$required_major" ; then
                                 required_major=0
                         fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
+                        required=`echo $required. | sed 's/[0-9]*[^0-9]//'`
                         required_minor=`echo $required | sed 's/[^0-9].*//'`
                         if test -z "$required_minor" ; then
                                 required_minor=0
                         fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
+                        required=`echo $required. | sed 's/[0-9]*[^0-9]//'`
                         required_patch=`echo $required | sed 's/[^0-9].*//'`
                         if test -z "$required_patch" ; then
                                 required_patch=0
@@ -17667,47 +19543,49 @@ $as_echo "$swig_version" >&6; }
                         if test -z "$available_patch" ; then
                                 available_patch=0
                         fi
-			badversion=0
-			if test $available_major -lt $required_major ; then
-				badversion=1
-			fi
-                        if test $available_major -eq $required_major \
-                                -a $available_minor -lt $required_minor ; then
-				badversion=1
-			fi
-                        if test $available_major -eq $required_major \
-                                -a $available_minor -eq $required_minor \
-                                -a $available_patch -lt $required_patch ; then
-				badversion=1
-			fi
-			if test $badversion -eq 1 ; then
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: SWIG version >= 2.0.1 is required.  You have $swig_version.  You should look at http://www.swig.org" >&5
-$as_echo "$as_me: WARNING: SWIG version >= 2.0.1 is required.  You have $swig_version.  You should look at http://www.swig.org" >&2;}
-                                SWIG='echo "Error: SWIG version >= 2.0.1 is required.  You have '"$swig_version"'.  You should look at http://www.swig.org" ; false'
+                        # Convert the version tuple into a single number for easier comparison.
+                        # Using base 100 should be safe since SWIG internally uses BCD values
+                        # to encode its version number.
+                        required_swig_vernum=`expr $required_major \* 10000 \
+                            \+ $required_minor \* 100 \+ $required_patch`
+                        available_swig_vernum=`expr $available_major \* 10000 \
+                            \+ $available_minor \* 100 \+ $available_patch`
+
+                        if test $available_swig_vernum -lt $required_swig_vernum; then
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: SWIG version >= 2.0.1 is required.  You have $swig_version." >&5
+printf "%s\n" "$as_me: WARNING: SWIG version >= 2.0.1 is required.  You have $swig_version." >&2;}
+                                SWIG=''
+
                         else
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: SWIG executable is '$SWIG'" >&5
-$as_echo "$as_me: SWIG executable is '$SWIG'" >&6;}
-                                SWIG_LIB=`$SWIG -swiglib`
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: SWIG library directory is '$SWIG_LIB'" >&5
-$as_echo "$as_me: SWIG library directory is '$SWIG_LIB'" >&6;}
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SWIG library" >&5
+printf %s "checking for SWIG library... " >&6; }
+                                SWIG_LIB=`$SWIG -swiglib | tr '\r\n' '  '`
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SWIG_LIB" >&5
+printf "%s\n" "$SWIG_LIB" >&6; }
+
                         fi
                 else
-                        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot determine SWIG version" >&5
-$as_echo "$as_me: WARNING: cannot determine SWIG version" >&2;}
-                        SWIG='echo "Error: Cannot determine SWIG version.  You should look at http://www.swig.org" ; false'
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cannot determine SWIG version" >&5
+printf "%s\n" "$as_me: WARNING: cannot determine SWIG version" >&2;}
+                        SWIG=''
+
                 fi
         fi
 
 
       else
 
-        # Extract the first word of "swig", so it can be a program name with args.
-set dummy swig; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_SWIG+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+        # Find path to the "swig" executable.
+        for ac_prog in swig swig3.0 swig2.0
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_SWIG+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $SWIG in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_SWIG="$SWIG" # Let the user override the test with a path.
@@ -17717,11 +19595,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_SWIG="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_SWIG="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -17733,24 +19615,27 @@ esac
 fi
 SWIG=$ac_cv_path_SWIG
 if test -n "$SWIG"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SWIG" >&5
-$as_echo "$SWIG" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SWIG" >&5
+printf "%s\n" "$SWIG" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
+  test -n "$SWIG" && break
+done
+
         if test -z "$SWIG" ; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot find 'swig' program. You should look at http://www.swig.org" >&5
-$as_echo "$as_me: WARNING: cannot find 'swig' program. You should look at http://www.swig.org" >&2;}
-                SWIG='echo "Error: SWIG is not installed. You should look at http://www.swig.org" ; false'
-        elif test -n "" ; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SWIG version" >&5
-$as_echo_n "checking for SWIG version... " >&6; }
+                :
+        elif test -z "" ; then
+                :
+	else
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SWIG version" >&5
+printf %s "checking SWIG version... " >&6; }
                 swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $swig_version" >&5
-$as_echo "$swig_version" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $swig_version" >&5
+printf "%s\n" "$swig_version" >&6; }
                 if test -n "$swig_version" ; then
                         # Calculate the required version number components
                         required=
@@ -17758,12 +19643,12 @@ $as_echo "$swig_version" >&6; }
                         if test -z "$required_major" ; then
                                 required_major=0
                         fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
+                        required=`echo $required. | sed 's/[0-9]*[^0-9]//'`
                         required_minor=`echo $required | sed 's/[^0-9].*//'`
                         if test -z "$required_minor" ; then
                                 required_minor=0
                         fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
+                        required=`echo $required. | sed 's/[0-9]*[^0-9]//'`
                         required_patch=`echo $required | sed 's/[^0-9].*//'`
                         if test -z "$required_patch" ; then
                                 required_patch=0
@@ -17784,57 +19669,55 @@ $as_echo "$swig_version" >&6; }
                         if test -z "$available_patch" ; then
                                 available_patch=0
                         fi
-			badversion=0
-			if test $available_major -lt $required_major ; then
-				badversion=1
-			fi
-                        if test $available_major -eq $required_major \
-                                -a $available_minor -lt $required_minor ; then
-				badversion=1
-			fi
-                        if test $available_major -eq $required_major \
-                                -a $available_minor -eq $required_minor \
-                                -a $available_patch -lt $required_patch ; then
-				badversion=1
-			fi
-			if test $badversion -eq 1 ; then
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: SWIG version >=  is required.  You have $swig_version.  You should look at http://www.swig.org" >&5
-$as_echo "$as_me: WARNING: SWIG version >=  is required.  You have $swig_version.  You should look at http://www.swig.org" >&2;}
-                                SWIG='echo "Error: SWIG version >=  is required.  You have '"$swig_version"'.  You should look at http://www.swig.org" ; false'
+                        # Convert the version tuple into a single number for easier comparison.
+                        # Using base 100 should be safe since SWIG internally uses BCD values
+                        # to encode its version number.
+                        required_swig_vernum=`expr $required_major \* 10000 \
+                            \+ $required_minor \* 100 \+ $required_patch`
+                        available_swig_vernum=`expr $available_major \* 10000 \
+                            \+ $available_minor \* 100 \+ $available_patch`
+
+                        if test $available_swig_vernum -lt $required_swig_vernum; then
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: SWIG version >=  is required.  You have $swig_version." >&5
+printf "%s\n" "$as_me: WARNING: SWIG version >=  is required.  You have $swig_version." >&2;}
+                                SWIG=''
+
                         else
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: SWIG executable is '$SWIG'" >&5
-$as_echo "$as_me: SWIG executable is '$SWIG'" >&6;}
-                                SWIG_LIB=`$SWIG -swiglib`
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: SWIG library directory is '$SWIG_LIB'" >&5
-$as_echo "$as_me: SWIG library directory is '$SWIG_LIB'" >&6;}
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SWIG library" >&5
+printf %s "checking for SWIG library... " >&6; }
+                                SWIG_LIB=`$SWIG -swiglib | tr '\r\n' '  '`
+                                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $SWIG_LIB" >&5
+printf "%s\n" "$SWIG_LIB" >&6; }
+
                         fi
                 else
-                        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot determine SWIG version" >&5
-$as_echo "$as_me: WARNING: cannot determine SWIG version" >&2;}
-                        SWIG='echo "Error: Cannot determine SWIG version.  You should look at http://www.swig.org" ; false'
+                        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cannot determine SWIG version" >&5
+printf "%s\n" "$as_me: WARNING: cannot determine SWIG version" >&2;}
+                        SWIG=''
+
                 fi
         fi
 
 
       fi
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking SWIG" >&5
-$as_echo_n "checking SWIG... " >&6; }
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking SWIG" >&5
+printf %s "checking SWIG... " >&6; }
       if test ! -x "$SWIG"; then
          as_fn_error $? "failed to find swig tool, install it, or do not build Python module and PyUnbound" "$LINENO" 5
       else
 
-$as_echo "#define HAVE_SWIG 1" >>confdefs.h
+printf "%s\n" "#define HAVE_SWIG 1" >>confdefs.h
 
          swig="$SWIG"
 
-         { $as_echo "$as_me:${as_lineno-$LINENO}: result: present" >&5
-$as_echo "present" >&6; }
+         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: present" >&5
+printf "%s\n" "present" >&6; }
 
          # If have Python & SWIG
          # Declare PythonMod
          if test x_$ub_with_pythonmod != x_no; then
 
-$as_echo "#define WITH_PYTHONMODULE 1" >>confdefs.h
+printf "%s\n" "#define WITH_PYTHONMODULE 1" >>confdefs.h
 
             WITH_PYTHONMODULE=yes
 
@@ -17851,7 +19734,7 @@ $as_echo "#define WITH_PYTHONMODULE 1" >>confdefs.h
          # Declare PyUnbound
          if test x_$ub_with_pyunbound != x_no; then
 
-$as_echo "#define WITH_PYUNBOUND 1" >>confdefs.h
+printf "%s\n" "#define WITH_PYUNBOUND 1" >>confdefs.h
 
             WITH_PYUNBOUND=yes
 
@@ -17866,8 +19749,8 @@ $as_echo "#define WITH_PYUNBOUND 1" >>confdefs.h
          fi
       fi
    else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: *** Python libraries not found, won't build PythonMod or PyUnbound ***" >&5
-$as_echo "*** Python libraries not found, won't build PythonMod or PyUnbound ***" >&6; }
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: *** Python libraries not found, won't build PythonMod or PyUnbound ***" >&5
+printf "%s\n" "*** Python libraries not found, won't build PythonMod or PyUnbound ***" >&6; }
       ub_with_pyunbound=no
       ub_with_pythonmod=no
    fi
@@ -17892,11 +19775,12 @@ CONFIG_DATE=`date +%Y%m%d`
 USE_NSS="no"
 
 # Check whether --with-nss was given.
-if test "${with_nss+set}" = set; then :
+if test ${with_nss+y}
+then :
   withval=$with_nss;
 	USE_NSS="yes"
 
-$as_echo "#define HAVE_NSS 1" >>confdefs.h
+printf "%s\n" "#define HAVE_NSS 1" >>confdefs.h
 
 	if test "$withval" != "" -a "$withval" != "yes"; then
 		CPPFLAGS="$CPPFLAGS -I$withval/include/nss3"
@@ -17926,25 +19810,21 @@ fi
 USE_NETTLE="no"
 
 # Check whether --with-nettle was given.
-if test "${with_nettle+set}" = set; then :
+if test ${with_nettle+y}
+then :
   withval=$with_nettle;
 	USE_NETTLE="yes"
 
-$as_echo "#define HAVE_NETTLE 1" >>confdefs.h
+printf "%s\n" "#define HAVE_NETTLE 1" >>confdefs.h
 
-	for ac_header in nettle/dsa-compat.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "nettle/dsa-compat.h" "ac_cv_header_nettle_dsa_compat_h" "$ac_includes_default
+	ac_fn_c_check_header_compile "$LINENO" "nettle/dsa-compat.h" "ac_cv_header_nettle_dsa_compat_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_nettle_dsa_compat_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NETTLE_DSA_COMPAT_H 1
-_ACEOF
+if test "x$ac_cv_header_nettle_dsa_compat_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETTLE_DSA_COMPAT_H 1" >>confdefs.h
 
 fi
 
-done
-
 	if test "$withval" != "" -a "$withval" != "yes"; then
 		CPPFLAGS="$CPPFLAGS -I$withval/include/nettle"
 		LDFLAGS="$LDFLAGS -L$withval/lib"
@@ -17972,10 +19852,11 @@ if test $USE_NSS = "no" -a $USE_NETTLE = "no"; then
 
 
 # Check whether --with-ssl was given.
-if test "${with_ssl+set}" = set; then :
+if test ${with_ssl+y}
+then :
   withval=$with_ssl;
 
-else
+else $as_nop
 
             withval="yes"
 
@@ -17987,8 +19868,8 @@ fi
 
     withval=$withval
     if test x_$withval != x_no; then
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSL" >&5
-$as_echo_n "checking for SSL... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SSL" >&5
+printf %s "checking for SSL... " >&6; }
 	if test -n "$withval"; then
 										if test ! -f "$withval/include/openssl/ssl.h" -a -f "$withval/openssl/ssl.h"; then
 			ssldir="$withval"
@@ -18027,12 +19908,10 @@ $as_echo_n "checking for SSL... " >&6; }
         if test x_$found_ssl != x_yes; then
             as_fn_error $? "Cannot find the SSL libraries in $withval" "$LINENO" 5
         else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $ssldir" >&5
-$as_echo "found in $ssldir" >&6; }
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $ssldir" >&5
+printf "%s\n" "found in $ssldir" >&6; }
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_SSL /**/
-_ACEOF
+printf "%s\n" "#define HAVE_SSL /**/" >>confdefs.h
 
             HAVE_SSL=yes
 	                if test "$ssldir" != "/usr"; then
@@ -18049,15 +19928,15 @@ _ACEOF
 
 	    fi
 
-            { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EVP_sha256 in -lcrypto" >&5
-$as_echo_n "checking for EVP_sha256 in -lcrypto... " >&6; }
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for EVP_sha256 in -lcrypto" >&5
+printf %s "checking for EVP_sha256 in -lcrypto... " >&6; }
             LIBS="$LIBS -lcrypto"
             LIBSSL_LIBS="$LIBSSL_LIBS -lcrypto"
             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
                 int EVP_sha256(void);
@@ -18067,30 +19946,31 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
 
-else
+else $as_nop
 
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
                 # check if -lwsock32 or -lgdi32 are needed.
                 BAKLIBS="$LIBS"
                 BAKSSLLIBS="$LIBSSL_LIBS"
 		LIBS="$LIBS -lgdi32 -lws2_32"
 		LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32"
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32" >&5
-$as_echo_n "checking if -lcrypto needs -lgdi32... " >&6; }
+                { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32" >&5
+printf %s "checking if -lcrypto needs -lgdi32... " >&6; }
                 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
                     int EVP_sha256(void);
@@ -18100,30 +19980,31 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
-                    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-                    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
                     LIBS="$BAKLIBS"
                     LIBSSL_LIBS="$BAKSSLLIBS"
 
 		    LIBS="$LIBS -lgdi32 -lws2_32 -lcrypt32"
 		    LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32 -lcrypt32"
-                    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32" >&5
-$as_echo_n "checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32... " >&6; }
+                    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32" >&5
+printf %s "checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32... " >&6; }
 		    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 			int EVP_sha256(void);
@@ -18133,30 +20014,31 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 			LIBS="$BAKLIBS"
 			LIBSSL_LIBS="$BAKSSLLIBS"
 
 			LIBS="$LIBS -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a"
 			LIBSSL_LIBS="$LIBSSL_LIBS -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a"
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a" >&5
-$as_echo_n "checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a... " >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a" >&5
+printf %s "checking if -lcrypto needs -lgdi32 -lws2_32 -lcrypt32 -l:libssp.a... " >&6; }
 			cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 			    int EVP_sha256(void);
@@ -18166,30 +20048,31 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
-			    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+			    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-			    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+			    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 			    LIBS="$BAKLIBS"
 			    LIBSSL_LIBS="$BAKSSLLIBS"
 
 			    LIBS="$LIBS -ldl"
 			    LIBSSL_LIBS="$LIBSSL_LIBS -ldl"
-			    { $as_echo "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -ldl" >&5
-$as_echo_n "checking if -lcrypto needs -ldl... " >&6; }
+			    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -ldl" >&5
+printf %s "checking if -lcrypto needs -ldl... " >&6; }
 			    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 				int EVP_sha256(void);
@@ -18199,29 +20082,30 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 				LIBS="$BAKLIBS"
 				LIBSSL_LIBS="$BAKSSLLIBS"
 				LIBS="$LIBS -ldl -pthread"
 				LIBSSL_LIBS="$LIBSSL_LIBS -ldl -pthread"
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -ldl -pthread" >&5
-$as_echo_n "checking if -lcrypto needs -ldl -pthread... " >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if -lcrypto needs -ldl -pthread" >&5
+printf %s "checking if -lcrypto needs -ldl -pthread... " >&6; }
 				cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 				    int EVP_sha256(void);
@@ -18231,128 +20115,113 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 
-$as_echo "#define HAVE_EVP_SHA256 1" >>confdefs.h
+printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
 
-				    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+				    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-else
+else $as_nop
 
-				    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+				    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 				    as_fn_error $? "OpenSSL found in $ssldir, but version 0.9.7 or higher is required" "$LINENO" 5
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
         fi
 
 
     fi
-for ac_header in openssl/ssl.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "openssl/ssl.h" "ac_cv_header_openssl_ssl_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "openssl/ssl.h" "ac_cv_header_openssl_ssl_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_openssl_ssl_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_OPENSSL_SSL_H 1
-_ACEOF
+if test "x$ac_cv_header_openssl_ssl_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_SSL_H 1" >>confdefs.h
 
 fi
 
-done
-
-for ac_header in openssl/err.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "openssl/err.h" "ac_cv_header_openssl_err_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "openssl/err.h" "ac_cv_header_openssl_err_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_openssl_err_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_OPENSSL_ERR_H 1
-_ACEOF
+if test "x$ac_cv_header_openssl_err_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_ERR_H 1" >>confdefs.h
 
 fi
 
-done
-
-for ac_header in openssl/rand.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "openssl/rand.h" "ac_cv_header_openssl_rand_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "openssl/rand.h" "ac_cv_header_openssl_rand_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_openssl_rand_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_OPENSSL_RAND_H 1
-_ACEOF
+if test "x$ac_cv_header_openssl_rand_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_RAND_H 1" >>confdefs.h
 
 fi
 
-done
-
 
 
 
 # check if libssl needs libdl
 BAKLIBS="$LIBS"
 LIBS="-lssl $LIBS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if libssl needs libdl" >&5
-$as_echo_n "checking if libssl needs libdl... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libssl needs libdl" >&5
+printf %s "checking if libssl needs libdl... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char SSL_CTX_new ();
 int
-main ()
+main (void)
 {
 return SSL_CTX_new ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	LIBS="$BAKLIBS"
 
-else
+else $as_nop
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	LIBS="$BAKLIBS"
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
-$as_echo_n "checking for library containing dlopen... " >&6; }
-if ${ac_cv_search_dlopen+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+printf %s "checking for library containing dlopen... " >&6; }
+if test ${ac_cv_search_dlopen+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -18360,53 +20229,55 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char dlopen ();
 int
-main ()
+main (void)
 {
 return dlopen ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' dl; do
+for ac_lib in '' dl
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_dlopen=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_dlopen+:} false; then :
+  if test ${ac_cv_search_dlopen+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_dlopen+:} false; then :
+if test ${ac_cv_search_dlopen+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_dlopen=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
-$as_echo "$ac_cv_search_dlopen" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+printf "%s\n" "$ac_cv_search_dlopen" >&6; }
 ac_res=$ac_cv_search_dlopen
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 SSLLIB="-lssl"
 
@@ -18416,13 +20287,13 @@ PC_CRYPTO_DEPENDENCY=""
 # check if -lcrypt32 is needed because CAPIENG needs that. (on windows)
 BAKLIBS="$LIBS"
 LIBS="-lssl $LIBS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if libssl needs -lcrypt32" >&5
-$as_echo_n "checking if libssl needs -lcrypt32... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if libssl needs -lcrypt32" >&5
+printf %s "checking if libssl needs -lcrypt32... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
-main ()
+main (void)
 {
 
 	int EVP_sha256(void);
@@ -18432,123 +20303,433 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	LIBS="$BAKLIBS"
 
-else
+else $as_nop
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	LIBS="$BAKLIBS"
 	LIBS="$LIBS -lcrypt32"
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for LibreSSL" >&5
-$as_echo_n "checking for LibreSSL... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for LibreSSL" >&5
+printf %s "checking for LibreSSL... " >&6; }
 if grep VERSION_TEXT $ssldir_include/openssl/opensslv.h | grep "LibreSSL" >/dev/null; then
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_LIBRESSL 1" >>confdefs.h
+printf "%s\n" "#define HAVE_LIBRESSL 1" >>confdefs.h
 
 	# libressl provides these compat functions, but they may also be
 	# declared by the OS in libc.  See if they have been declared.
-	ac_fn_c_check_decl "$LINENO" "strlcpy" "ac_cv_have_decl_strlcpy" "$ac_includes_default"
-if test "x$ac_cv_have_decl_strlcpy" = xyes; then :
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC options needed to detect all undeclared functions" >&5
+printf %s "checking for $CC options needed to detect all undeclared functions... " >&6; }
+if test ${ac_cv_c_undeclared_builtin_options+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_save_CFLAGS=$CFLAGS
+   ac_cv_c_undeclared_builtin_options='cannot detect'
+   for ac_arg in '' -fno-builtin; do
+     CFLAGS="$ac_save_CFLAGS $ac_arg"
+     # This test program should *not* compile successfully.
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+(void) strchr;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+else $as_nop
+  # This test program should compile successfully.
+        # No library function is consistently available on
+        # freestanding implementations, so test against a dummy
+        # declaration.  Include always-available headers on the
+        # off chance that they somehow elicit warnings.
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <float.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stddef.h>
+extern void ac_decl (int, char *);
+
+int
+main (void)
+{
+(void) ac_decl (0, (char *) 0);
+  (void) ac_decl;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  if test x"$ac_arg" = x
+then :
+  ac_cv_c_undeclared_builtin_options='none needed'
+else $as_nop
+  ac_cv_c_undeclared_builtin_options=$ac_arg
+fi
+          break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+    done
+    CFLAGS=$ac_save_CFLAGS
+
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_undeclared_builtin_options" >&5
+printf "%s\n" "$ac_cv_c_undeclared_builtin_options" >&6; }
+  case $ac_cv_c_undeclared_builtin_options in #(
+  'cannot detect') :
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "cannot make $CC report undeclared builtins
+See \`config.log' for more details" "$LINENO" 5; } ;; #(
+  'none needed') :
+    ac_c_undeclared_builtin_options='' ;; #(
+  *) :
+    ac_c_undeclared_builtin_options=$ac_cv_c_undeclared_builtin_options ;;
+esac
+
+ac_fn_check_decl "$LINENO" "strlcpy" "ac_cv_have_decl_strlcpy" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strlcpy" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_STRLCPY $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "strlcat" "ac_cv_have_decl_strlcat" "$ac_includes_default"
-if test "x$ac_cv_have_decl_strlcat" = xyes; then :
+printf "%s\n" "#define HAVE_DECL_STRLCPY $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "strlcat" "ac_cv_have_decl_strlcat" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_strlcat" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_STRLCAT $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "arc4random" "ac_cv_have_decl_arc4random" "$ac_includes_default"
-if test "x$ac_cv_have_decl_arc4random" = xyes; then :
+printf "%s\n" "#define HAVE_DECL_STRLCAT $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "arc4random" "ac_cv_have_decl_arc4random" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_arc4random" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_ARC4RANDOM $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "arc4random_uniform" "ac_cv_have_decl_arc4random_uniform" "$ac_includes_default"
-if test "x$ac_cv_have_decl_arc4random_uniform" = xyes; then :
+printf "%s\n" "#define HAVE_DECL_ARC4RANDOM $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "arc4random_uniform" "ac_cv_have_decl_arc4random_uniform" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_arc4random_uniform" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_ARC4RANDOM_UNIFORM $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_ARC4RANDOM_UNIFORM $ac_have_decl" >>confdefs.h
 
 else
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-for ac_header in openssl/conf.h openssl/engine.h openssl/bn.h openssl/dh.h openssl/dsa.h openssl/rsa.h openssl/core_names.h openssl/param_build.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "openssl/conf.h" "ac_cv_header_openssl_conf_h" "$ac_includes_default
 "
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
+if test "x$ac_cv_header_openssl_conf_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_CONF_H 1" >>confdefs.h
 
 fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/engine.h" "ac_cv_header_openssl_engine_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_engine_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_ENGINE_H 1" >>confdefs.h
 
-done
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/bn.h" "ac_cv_header_openssl_bn_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_bn_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_BN_H 1" >>confdefs.h
 
-for ac_func in OPENSSL_config EVP_sha1 EVP_sha256 EVP_sha512 FIPS_mode EVP_default_properties_is_fips_enabled EVP_MD_CTX_new OpenSSL_add_all_digests OPENSSL_init_crypto EVP_cleanup ENGINE_cleanup ERR_load_crypto_strings CRYPTO_cleanup_all_ex_data ERR_free_strings RAND_cleanup DSA_SIG_set0 EVP_dss1 EVP_DigestVerify EVP_aes_256_cbc EVP_EncryptInit_ex HMAC_Init_ex CRYPTO_THREADID_set_callback EVP_MAC_CTX_set_params OSSL_PARAM_BLD_new BIO_set_callback_ex
-do :
-  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/dh.h" "ac_cv_header_openssl_dh_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_dh_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_DH_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/dsa.h" "ac_cv_header_openssl_dsa_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_dsa_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_DSA_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/rsa.h" "ac_cv_header_openssl_rsa_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_rsa_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_RSA_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/core_names.h" "ac_cv_header_openssl_core_names_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_core_names_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_CORE_NAMES_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "openssl/param_build.h" "ac_cv_header_openssl_param_build_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_openssl_param_build_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_PARAM_BUILD_H 1" >>confdefs.h
+
+fi
+
+ac_fn_c_check_func "$LINENO" "OPENSSL_config" "ac_cv_func_OPENSSL_config"
+if test "x$ac_cv_func_OPENSSL_config" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_CONFIG 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_sha1" "ac_cv_func_EVP_sha1"
+if test "x$ac_cv_func_EVP_sha1" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_SHA1 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_sha256" "ac_cv_func_EVP_sha256"
+if test "x$ac_cv_func_EVP_sha256" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_SHA256 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_sha512" "ac_cv_func_EVP_sha512"
+if test "x$ac_cv_func_EVP_sha512" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_SHA512 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "FIPS_mode" "ac_cv_func_FIPS_mode"
+if test "x$ac_cv_func_FIPS_mode" = xyes
+then :
+  printf "%s\n" "#define HAVE_FIPS_MODE 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_default_properties_is_fips_enabled" "ac_cv_func_EVP_default_properties_is_fips_enabled"
+if test "x$ac_cv_func_EVP_default_properties_is_fips_enabled" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_DEFAULT_PROPERTIES_IS_FIPS_ENABLED 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_MD_CTX_new" "ac_cv_func_EVP_MD_CTX_new"
+if test "x$ac_cv_func_EVP_MD_CTX_new" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_MD_CTX_NEW 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "OpenSSL_add_all_digests" "ac_cv_func_OpenSSL_add_all_digests"
+if test "x$ac_cv_func_OpenSSL_add_all_digests" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_ADD_ALL_DIGESTS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "OPENSSL_init_crypto" "ac_cv_func_OPENSSL_init_crypto"
+if test "x$ac_cv_func_OPENSSL_init_crypto" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_INIT_CRYPTO 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_cleanup" "ac_cv_func_EVP_cleanup"
+if test "x$ac_cv_func_EVP_cleanup" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_CLEANUP 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ENGINE_cleanup" "ac_cv_func_ENGINE_cleanup"
+if test "x$ac_cv_func_ENGINE_cleanup" = xyes
+then :
+  printf "%s\n" "#define HAVE_ENGINE_CLEANUP 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ERR_load_crypto_strings" "ac_cv_func_ERR_load_crypto_strings"
+if test "x$ac_cv_func_ERR_load_crypto_strings" = xyes
+then :
+  printf "%s\n" "#define HAVE_ERR_LOAD_CRYPTO_STRINGS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "CRYPTO_cleanup_all_ex_data" "ac_cv_func_CRYPTO_cleanup_all_ex_data"
+if test "x$ac_cv_func_CRYPTO_cleanup_all_ex_data" = xyes
+then :
+  printf "%s\n" "#define HAVE_CRYPTO_CLEANUP_ALL_EX_DATA 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ERR_free_strings" "ac_cv_func_ERR_free_strings"
+if test "x$ac_cv_func_ERR_free_strings" = xyes
+then :
+  printf "%s\n" "#define HAVE_ERR_FREE_STRINGS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "RAND_cleanup" "ac_cv_func_RAND_cleanup"
+if test "x$ac_cv_func_RAND_cleanup" = xyes
+then :
+  printf "%s\n" "#define HAVE_RAND_CLEANUP 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "DSA_SIG_set0" "ac_cv_func_DSA_SIG_set0"
+if test "x$ac_cv_func_DSA_SIG_set0" = xyes
+then :
+  printf "%s\n" "#define HAVE_DSA_SIG_SET0 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_dss1" "ac_cv_func_EVP_dss1"
+if test "x$ac_cv_func_EVP_dss1" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_DSS1 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_DigestVerify" "ac_cv_func_EVP_DigestVerify"
+if test "x$ac_cv_func_EVP_DigestVerify" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_DIGESTVERIFY 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_aes_256_cbc" "ac_cv_func_EVP_aes_256_cbc"
+if test "x$ac_cv_func_EVP_aes_256_cbc" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_AES_256_CBC 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_EncryptInit_ex" "ac_cv_func_EVP_EncryptInit_ex"
+if test "x$ac_cv_func_EVP_EncryptInit_ex" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_ENCRYPTINIT_EX 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "HMAC_Init_ex" "ac_cv_func_HMAC_Init_ex"
+if test "x$ac_cv_func_HMAC_Init_ex" = xyes
+then :
+  printf "%s\n" "#define HAVE_HMAC_INIT_EX 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "CRYPTO_THREADID_set_callback" "ac_cv_func_CRYPTO_THREADID_set_callback"
+if test "x$ac_cv_func_CRYPTO_THREADID_set_callback" = xyes
+then :
+  printf "%s\n" "#define HAVE_CRYPTO_THREADID_SET_CALLBACK 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "EVP_MAC_CTX_set_params" "ac_cv_func_EVP_MAC_CTX_set_params"
+if test "x$ac_cv_func_EVP_MAC_CTX_set_params" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVP_MAC_CTX_SET_PARAMS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "OSSL_PARAM_BLD_new" "ac_cv_func_OSSL_PARAM_BLD_new"
+if test "x$ac_cv_func_OSSL_PARAM_BLD_new" = xyes
+then :
+  printf "%s\n" "#define HAVE_OSSL_PARAM_BLD_NEW 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "BIO_set_callback_ex" "ac_cv_func_BIO_set_callback_ex"
+if test "x$ac_cv_func_BIO_set_callback_ex" = xyes
+then :
+  printf "%s\n" "#define HAVE_BIO_SET_CALLBACK_EX 1" >>confdefs.h
 
 fi
-done
 
 
 # these check_funcs need -lssl
 BAKLIBS="$LIBS"
 LIBS="-lssl $LIBS"
-for ac_func in OPENSSL_init_ssl SSL_CTX_set_security_level SSL_set1_host SSL_get0_peername X509_VERIFY_PARAM_set1_host SSL_CTX_set_ciphersuites SSL_CTX_set_tlsext_ticket_key_evp_cb SSL_CTX_set_alpn_select_cb SSL_get0_alpn_selected SSL_CTX_set_alpn_protos SSL_get1_peer_certificate
-do :
-  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
+ac_fn_c_check_func "$LINENO" "OPENSSL_init_ssl" "ac_cv_func_OPENSSL_init_ssl"
+if test "x$ac_cv_func_OPENSSL_init_ssl" = xyes
+then :
+  printf "%s\n" "#define HAVE_OPENSSL_INIT_SSL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_CTX_set_security_level" "ac_cv_func_SSL_CTX_set_security_level"
+if test "x$ac_cv_func_SSL_CTX_set_security_level" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_CTX_SET_SECURITY_LEVEL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_set1_host" "ac_cv_func_SSL_set1_host"
+if test "x$ac_cv_func_SSL_set1_host" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_SET1_HOST 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_get0_peername" "ac_cv_func_SSL_get0_peername"
+if test "x$ac_cv_func_SSL_get0_peername" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_GET0_PEERNAME 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "X509_VERIFY_PARAM_set1_host" "ac_cv_func_X509_VERIFY_PARAM_set1_host"
+if test "x$ac_cv_func_X509_VERIFY_PARAM_set1_host" = xyes
+then :
+  printf "%s\n" "#define HAVE_X509_VERIFY_PARAM_SET1_HOST 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_CTX_set_ciphersuites" "ac_cv_func_SSL_CTX_set_ciphersuites"
+if test "x$ac_cv_func_SSL_CTX_set_ciphersuites" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_CTX_SET_CIPHERSUITES 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_CTX_set_tlsext_ticket_key_evp_cb" "ac_cv_func_SSL_CTX_set_tlsext_ticket_key_evp_cb"
+if test "x$ac_cv_func_SSL_CTX_set_tlsext_ticket_key_evp_cb" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_CTX_set_alpn_select_cb" "ac_cv_func_SSL_CTX_set_alpn_select_cb"
+if test "x$ac_cv_func_SSL_CTX_set_alpn_select_cb" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_CTX_SET_ALPN_SELECT_CB 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_get0_alpn_selected" "ac_cv_func_SSL_get0_alpn_selected"
+if test "x$ac_cv_func_SSL_get0_alpn_selected" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_GET0_ALPN_SELECTED 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_CTX_set_alpn_protos" "ac_cv_func_SSL_CTX_set_alpn_protos"
+if test "x$ac_cv_func_SSL_CTX_set_alpn_protos" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_CTX_SET_ALPN_PROTOS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "SSL_get1_peer_certificate" "ac_cv_func_SSL_get1_peer_certificate"
+if test "x$ac_cv_func_SSL_get1_peer_certificate" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_GET1_PEER_CERTIFICATE 1" >>confdefs.h
 
 fi
-done
 
 LIBS="$BAKLIBS"
 
-ac_fn_c_check_decl "$LINENO" "SSL_COMP_get_compression_methods" "ac_cv_have_decl_SSL_COMP_get_compression_methods" "
+ac_fn_check_decl "$LINENO" "SSL_COMP_get_compression_methods" "ac_cv_have_decl_SSL_COMP_get_compression_methods" "
 $ac_includes_default
 #ifdef HAVE_OPENSSL_ERR_H
 #include <openssl/err.h>
@@ -18568,17 +20749,15 @@ $ac_includes_default
 #include <openssl/ssl.h>
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_SSL_COMP_get_compression_methods" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_SSL_COMP_get_compression_methods" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "sk_SSL_COMP_pop_free" "ac_cv_have_decl_sk_SSL_COMP_pop_free" "
+printf "%s\n" "#define HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "sk_SSL_COMP_pop_free" "ac_cv_have_decl_sk_SSL_COMP_pop_free" "
 $ac_includes_default
 #ifdef HAVE_OPENSSL_ERR_H
 #include <openssl/err.h>
@@ -18598,17 +20777,15 @@ $ac_includes_default
 #include <openssl/ssl.h>
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_sk_SSL_COMP_pop_free" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_sk_SSL_COMP_pop_free" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_SK_SSL_COMP_POP_FREE $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "SSL_CTX_set_ecdh_auto" "ac_cv_have_decl_SSL_CTX_set_ecdh_auto" "
+printf "%s\n" "#define HAVE_DECL_SK_SSL_COMP_POP_FREE $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "SSL_CTX_set_ecdh_auto" "ac_cv_have_decl_SSL_CTX_set_ecdh_auto" "
 $ac_includes_default
 #ifdef HAVE_OPENSSL_ERR_H
 #include <openssl/err.h>
@@ -18628,22 +20805,20 @@ $ac_includes_default
 #include <openssl/ssl.h>
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_SSL_CTX_set_ecdh_auto" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_SSL_CTX_set_ecdh_auto" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_SSL_CTX_SET_ECDH_AUTO $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_SSL_CTX_SET_ECDH_AUTO $ac_have_decl" >>confdefs.h
 
 
 if test "$ac_cv_func_HMAC_Init_ex" = "yes"; then
 # check function return type.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking the return type of HMAC_Init_ex" >&5
-$as_echo_n "checking the return type of HMAC_Init_ex... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking the return type of HMAC_Init_ex" >&5
+printf %s "checking the return type of HMAC_Init_ex... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -18666,7 +20841,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #include <openssl/evp.h>
 
 int
-main ()
+main (void)
 {
 
 	HMAC_CTX* hmac_ctx = NULL;
@@ -18679,21 +20854,22 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_c_try_compile "$LINENO"
+then :
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: int" >&5
-$as_echo "int" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: int" >&5
+printf "%s\n" "int" >&6; }
 
-else
+else $as_nop
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: void" >&5
-$as_echo "void" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: void" >&5
+printf "%s\n" "void" >&6; }
 
-$as_echo "#define HMAC_INIT_EX_RETURNS_VOID 1" >>confdefs.h
+printf "%s\n" "#define HMAC_INIT_EX_RETURNS_VOID 1" >>confdefs.h
 
 
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
 fi
@@ -18702,30 +20878,33 @@ fi
 # libbsd
 
 # Check whether --with-libbsd was given.
-if test "${with_libbsd+set}" = set; then :
+if test ${with_libbsd+y}
+then :
   withval=$with_libbsd;
-	for ac_header in bsd/string.h bsd/stdlib.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+	ac_fn_c_check_header_compile "$LINENO" "bsd/string.h" "ac_cv_header_bsd_string_h" "$ac_includes_default
 "
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
+if test "x$ac_cv_header_bsd_string_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_BSD_STRING_H 1" >>confdefs.h
 
 fi
+ac_fn_c_check_header_compile "$LINENO" "bsd/stdlib.h" "ac_cv_header_bsd_stdlib_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_bsd_stdlib_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_BSD_STDLIB_H 1" >>confdefs.h
 
-done
+fi
 
 	if test "x$ac_cv_header_bsd_string_h" = xyes -a "x$ac_cv_header_bsd_stdlib_h" = xyes; then
 		for func in strlcpy strlcat arc4random arc4random_uniform reallocarray; do
-			as_ac_Search=`$as_echo "ac_cv_search_$func" | $as_tr_sh`
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing $func" >&5
-$as_echo_n "checking for library containing $func... " >&6; }
-if eval \${$as_ac_Search+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+			as_ac_Search=`printf "%s\n" "ac_cv_search_$func" | $as_tr_sh`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing $func" >&5
+printf %s "checking for library containing $func... " >&6; }
+if eval test \${$as_ac_Search+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -18733,51 +20912,53 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char $func ();
 int
-main ()
+main (void)
 {
 return $func ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' bsd; do
+for ac_lib in '' bsd
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   eval "$as_ac_Search=\$ac_res"
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if eval \${$as_ac_Search+:} false; then :
+  if eval test \${$as_ac_Search+y}
+then :
   break
 fi
 done
-if eval \${$as_ac_Search+:} false; then :
+if eval test \${$as_ac_Search+y}
+then :
 
-else
+else $as_nop
   eval "$as_ac_Search=no"
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
 eval ac_res=\$$as_ac_Search
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
 eval ac_res=\$$as_ac_Search
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 
-$as_echo "#define HAVE_LIBBSD 1" >>confdefs.h
+printf "%s\n" "#define HAVE_LIBBSD 1" >>confdefs.h
 
 				PC_LIBBSD_DEPENDENCY=libbsd
 
@@ -18791,7 +20972,8 @@ fi
 
 
 # Check whether --enable-sha1 was given.
-if test "${enable_sha1+set}" = set; then :
+if test ${enable_sha1+y}
+then :
   enableval=$enable_sha1;
 fi
 
@@ -18800,14 +20982,15 @@ case "$enable_sha1" in
 	;;
 	yes|*)
 
-$as_echo "#define USE_SHA1 1" >>confdefs.h
+printf "%s\n" "#define USE_SHA1 1" >>confdefs.h
 
 	;;
 esac
 
 
 # Check whether --enable-sha2 was given.
-if test "${enable_sha2+set}" = set; then :
+if test ${enable_sha2+y}
+then :
   enableval=$enable_sha2;
 fi
 
@@ -18816,20 +20999,21 @@ case "$enable_sha2" in
 	;;
 	yes|*)
 
-$as_echo "#define USE_SHA2 1" >>confdefs.h
+printf "%s\n" "#define USE_SHA2 1" >>confdefs.h
 
 	;;
 esac
 
 # Check whether --enable-subnet was given.
-if test "${enable_subnet+set}" = set; then :
+if test ${enable_subnet+y}
+then :
   enableval=$enable_subnet;
 fi
 
 case "$enable_subnet" in
 	yes)
 
-$as_echo "#define CLIENT_SUBNET 1" >>confdefs.h
+printf "%s\n" "#define CLIENT_SUBNET 1" >>confdefs.h
 
 	SUBNET_OBJ="edns-subnet.lo subnetmod.lo addrtree.lo subnet-whitelist.lo"
 
@@ -18843,7 +21027,8 @@ esac
 # check whether gost also works
 
 # Check whether --enable-gost was given.
-if test "${enable_gost+set}" = set; then :
+if test ${enable_gost+y}
+then :
   enableval=$enable_gost;
 fi
 
@@ -18854,30 +21039,33 @@ case "$enable_gost" in
 	;;
 	*)
 	ac_fn_c_check_func "$LINENO" "EVP_PKEY_set_type_str" "ac_cv_func_EVP_PKEY_set_type_str"
-if test "x$ac_cv_func_EVP_PKEY_set_type_str" = xyes; then :
+if test "x$ac_cv_func_EVP_PKEY_set_type_str" = xyes
+then :
   :
-else
+else $as_nop
   as_fn_error $? "OpenSSL 1.0.0 is needed for GOST support" "$LINENO" 5
 fi
 
 	ac_fn_c_check_func "$LINENO" "EC_KEY_new" "ac_cv_func_EC_KEY_new"
-if test "x$ac_cv_func_EC_KEY_new" = xyes; then :
+if test "x$ac_cv_func_EC_KEY_new" = xyes
+then :
 
-else
+else $as_nop
   as_fn_error $? "OpenSSL does not support ECC, needed for GOST support" "$LINENO" 5
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if GOST works" >&5
-$as_echo_n "checking if GOST works... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if GOST works" >&5
+printf %s "checking if GOST works... " >&6; }
 if test c${cross_compiling} = cno; then
 BAKCFLAGS="$CFLAGS"
 if test -n "$ssldir"; then
 	CFLAGS="$CFLAGS -Wl,-rpath,$ssldir_lib"
 fi
-if test "$cross_compiling" = yes; then :
+if test "$cross_compiling" = yes
+then :
   eval "ac_cv_c_gost_works=maybe"
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -18963,9 +21151,10 @@ int main(void) {
 }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_c_try_run "$LINENO"
+then :
   eval "ac_cv_c_gost_works=yes"
-else
+else $as_nop
   eval "ac_cv_c_gost_works=no"
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
@@ -18976,20 +21165,21 @@ CFLAGS="$BAKCFLAGS"
 else
 eval "ac_cv_c_gost_works=maybe"
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_gost_works" >&5
-$as_echo "$ac_cv_c_gost_works" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_gost_works" >&5
+printf "%s\n" "$ac_cv_c_gost_works" >&6; }
 
 	if test "$ac_cv_c_gost_works" != no; then
 		use_gost="yes"
 
-$as_echo "#define USE_GOST 1" >>confdefs.h
+printf "%s\n" "#define USE_GOST 1" >>confdefs.h
 
 	fi
 	;;
 esac
 fi
 # Check whether --enable-ecdsa was given.
-if test "${enable_ecdsa+set}" = set; then :
+if test ${enable_ecdsa+y}
+then :
   enableval=$enable_ecdsa;
 fi
 
@@ -19000,90 +21190,87 @@ case "$enable_ecdsa" in
     *)
       if test $USE_NSS = "no" -a $USE_NETTLE = "no"; then
 	      ac_fn_c_check_func "$LINENO" "ECDSA_sign" "ac_cv_func_ECDSA_sign"
-if test "x$ac_cv_func_ECDSA_sign" = xyes; then :
+if test "x$ac_cv_func_ECDSA_sign" = xyes
+then :
 
-else
+else $as_nop
   as_fn_error $? "OpenSSL does not support ECDSA: please upgrade or rerun with --disable-ecdsa" "$LINENO" 5
 fi
 
 	      ac_fn_c_check_func "$LINENO" "SHA384_Init" "ac_cv_func_SHA384_Init"
-if test "x$ac_cv_func_SHA384_Init" = xyes; then :
+if test "x$ac_cv_func_SHA384_Init" = xyes
+then :
 
-else
+else $as_nop
   as_fn_error $? "OpenSSL does not support SHA384: please upgrade or rerun with --disable-ecdsa" "$LINENO" 5
 fi
 
-	      ac_fn_c_check_decl "$LINENO" "NID_X9_62_prime256v1" "ac_cv_have_decl_NID_X9_62_prime256v1" "$ac_includes_default
+	      ac_fn_check_decl "$LINENO" "NID_X9_62_prime256v1" "ac_cv_have_decl_NID_X9_62_prime256v1" "$ac_includes_default
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_NID_X9_62_prime256v1" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_NID_X9_62_prime256v1" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
+printf "%s\n" "#define HAVE_DECL_NID_X9_62_PRIME256V1 $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_NID_X9_62_PRIME256V1 $ac_have_decl
-_ACEOF
-if test $ac_have_decl = 1; then :
-
-else
+else $as_nop
   as_fn_error $? "OpenSSL does not support the ECDSA curves: please upgrade or rerun with --disable-ecdsa" "$LINENO" 5
 fi
-ac_fn_c_check_decl "$LINENO" "NID_secp384r1" "ac_cv_have_decl_NID_secp384r1" "$ac_includes_default
+ac_fn_check_decl "$LINENO" "NID_secp384r1" "ac_cv_have_decl_NID_secp384r1" "$ac_includes_default
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_NID_secp384r1" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_NID_secp384r1" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
+printf "%s\n" "#define HAVE_DECL_NID_SECP384R1 $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_NID_SECP384R1 $ac_have_decl
-_ACEOF
-if test $ac_have_decl = 1; then :
-
-else
+else $as_nop
   as_fn_error $? "OpenSSL does not support the ECDSA curves: please upgrade or rerun with --disable-ecdsa" "$LINENO" 5
 fi
 
 	      # see if OPENSSL 1.0.0 or later (has EVP MD and Verify independency)
-	      { $as_echo "$as_me:${as_lineno-$LINENO}: checking if openssl supports SHA2 and ECDSA with EVP" >&5
-$as_echo_n "checking if openssl supports SHA2 and ECDSA with EVP... " >&6; }
+	      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if openssl supports SHA2 and ECDSA with EVP" >&5
+printf %s "checking if openssl supports SHA2 and ECDSA with EVP... " >&6; }
 	      if grep OPENSSL_VERSION_TEXT $ssldir_include/openssl/opensslv.h | grep "OpenSSL" >/dev/null; then
 		if grep OPENSSL_VERSION_NUMBER $ssldir_include/openssl/opensslv.h | grep 0x0 >/dev/null; then
-		  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
-cat >>confdefs.h <<_ACEOF
-#define USE_ECDSA_EVP_WORKAROUND 1
-_ACEOF
+printf "%s\n" "#define USE_ECDSA_EVP_WORKAROUND 1" >>confdefs.h
 
 		else
-		  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+		  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 		fi
 	      else
 		# not OpenSSL, thus likely LibreSSL, which supports it
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	      fi
       fi
       # we now know we have ECDSA and the required curves.
 
-cat >>confdefs.h <<_ACEOF
-#define USE_ECDSA 1
-_ACEOF
+printf "%s\n" "#define USE_ECDSA 1" >>confdefs.h
 
       use_ecdsa="yes"
       ;;
 esac
 
 # Check whether --enable-dsa was given.
-if test "${enable_dsa+set}" = set; then :
+if test ${enable_dsa+y}
+then :
   enableval=$enable_dsa;
 fi
 
@@ -19093,9 +21280,10 @@ case "$enable_dsa" in
       # detect if DSA is supported, and turn it off if not.
       if test $USE_NSS = "no" -a $USE_NETTLE = "no"; then
       ac_fn_c_check_func "$LINENO" "DSA_SIG_new" "ac_cv_func_DSA_SIG_new"
-if test "x$ac_cv_func_DSA_SIG_new" = xyes; then :
+if test "x$ac_cv_func_DSA_SIG_new" = xyes
+then :
 
-      as_ac_Type=`$as_echo "ac_cv_type_DSA_SIG*" | $as_tr_sh`
+      as_ac_Type=`printf "%s\n" "ac_cv_type_DSA_SIG*" | $as_tr_sh`
 ac_fn_c_check_type "$LINENO" "DSA_SIG*" "$as_ac_Type" "
 $ac_includes_default
 #ifdef HAVE_OPENSSL_ERR_H
@@ -19115,30 +21303,27 @@ $ac_includes_default
 #endif
 
 "
-if eval test \"x\$"$as_ac_Type"\" = x"yes"; then :
+if eval test \"x\$"$as_ac_Type"\" = x"yes"
+then :
 
 
-cat >>confdefs.h <<_ACEOF
-#define USE_DSA 1
-_ACEOF
+printf "%s\n" "#define USE_DSA 1" >>confdefs.h
 
 
-else
+else $as_nop
   if test "x$enable_dsa" = "xyes"; then as_fn_error $? "OpenSSL does not support DSA and you used --enable-dsa." "$LINENO" 5
                fi
 fi
 
 
-else
+else $as_nop
   if test "x$enable_dsa" = "xyes"; then as_fn_error $? "OpenSSL does not support DSA and you used --enable-dsa." "$LINENO" 5
                fi
 fi
 
       else
 
-cat >>confdefs.h <<_ACEOF
-#define USE_DSA 1
-_ACEOF
+printf "%s\n" "#define USE_DSA 1" >>confdefs.h
 
       fi
       ;;
@@ -19150,18 +21335,20 @@ esac
 
 
 # Check whether --with-deprecate-rsa-1024 was given.
-if test "${with_deprecate_rsa_1024+set}" = set; then :
+if test ${with_deprecate_rsa_1024+y}
+then :
   withval=$with_deprecate_rsa_1024;
 fi
 
 if test "$with_deprecate_rsa_1024" = "yes"; then
 
-$as_echo "#define DEPRECATE_RSA_1024 1" >>confdefs.h
+printf "%s\n" "#define DEPRECATE_RSA_1024 1" >>confdefs.h
 
 fi
 
 # Check whether --enable-ed25519 was given.
-if test "${enable_ed25519+set}" = set; then :
+if test ${enable_ed25519+y}
+then :
   enableval=$enable_ed25519;
 fi
 
@@ -19171,56 +21358,52 @@ case "$enable_ed25519" in
       ;;
     *)
       if test $USE_NSS = "no" -a $USE_NETTLE = "no"; then
-	      ac_fn_c_check_decl "$LINENO" "NID_ED25519" "ac_cv_have_decl_NID_ED25519" "$ac_includes_default
+	      ac_fn_check_decl "$LINENO" "NID_ED25519" "ac_cv_have_decl_NID_ED25519" "$ac_includes_default
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_NID_ED25519" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_NID_ED25519" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_NID_ED25519 $ac_have_decl
-_ACEOF
-if test $ac_have_decl = 1; then :
+printf "%s\n" "#define HAVE_DECL_NID_ED25519 $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
 
       		use_ed25519="yes"
 
-else
+else $as_nop
    if test "x$enable_ed25519" = "xyes"; then as_fn_error $? "OpenSSL does not support ED25519 and you used --enable-ed25519." "$LINENO" 5
 	      	fi
 fi
 
       fi
       if test $USE_NETTLE = "yes"; then
-		for ac_header in nettle/eddsa.h
+		       for ac_header in nettle/eddsa.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "nettle/eddsa.h" "ac_cv_header_nettle_eddsa_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_nettle_eddsa_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NETTLE_EDDSA_H 1
-_ACEOF
+if test "x$ac_cv_header_nettle_eddsa_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NETTLE_EDDSA_H 1" >>confdefs.h
  use_ed25519="yes"
 fi
 
 done
-
       fi
       if test $use_ed25519 = "yes"; then
 
-cat >>confdefs.h <<_ACEOF
-#define USE_ED25519 1
-_ACEOF
+printf "%s\n" "#define USE_ED25519 1" >>confdefs.h
 
       fi
       ;;
 esac
 
 # Check whether --enable-ed448 was given.
-if test "${enable_ed448+set}" = set; then :
+if test ${enable_ed448+y}
+then :
   enableval=$enable_ed448;
 fi
 
@@ -19230,24 +21413,23 @@ case "$enable_ed448" in
       ;;
     *)
       if test $USE_NSS = "no" -a $USE_NETTLE = "no"; then
-	      ac_fn_c_check_decl "$LINENO" "NID_ED448" "ac_cv_have_decl_NID_ED448" "$ac_includes_default
+	      ac_fn_check_decl "$LINENO" "NID_ED448" "ac_cv_have_decl_NID_ED448" "$ac_includes_default
 #include <openssl/evp.h>
 
-"
-if test "x$ac_cv_have_decl_NID_ED448" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_NID_ED448" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_NID_ED448 $ac_have_decl
-_ACEOF
-if test $ac_have_decl = 1; then :
+printf "%s\n" "#define HAVE_DECL_NID_ED448 $ac_have_decl" >>confdefs.h
+if test $ac_have_decl = 1
+then :
 
       		use_ed448="yes"
 
-else
+else $as_nop
    if test "x$enable_ed448" = "xyes"; then as_fn_error $? "OpenSSL does not support ED448 and you used --enable-ed448." "$LINENO" 5
 	      	fi
 fi
@@ -19255,16 +21437,15 @@ fi
       fi
       if test $use_ed448 = "yes"; then
 
-cat >>confdefs.h <<_ACEOF
-#define USE_ED448 1
-_ACEOF
+printf "%s\n" "#define USE_ED448 1" >>confdefs.h
 
       fi
       ;;
 esac
 
 # Check whether --enable-event-api was given.
-if test "${enable_event_api+set}" = set; then :
+if test ${enable_event_api+y}
+then :
   enableval=$enable_event_api;
 fi
 
@@ -19280,45 +21461,42 @@ case "$enable_event_api" in
 esac
 
 # Check whether --enable-tfo-client was given.
-if test "${enable_tfo_client+set}" = set; then :
+if test ${enable_tfo_client+y}
+then :
   enableval=$enable_tfo_client;
 fi
 
 case "$enable_tfo_client" in
 	yes)
 		case "$host_os" in
-			linux*) ac_fn_c_check_decl "$LINENO" "MSG_FASTOPEN" "ac_cv_have_decl_MSG_FASTOPEN" "$ac_includes_default
+			linux*) ac_fn_check_decl "$LINENO" "MSG_FASTOPEN" "ac_cv_have_decl_MSG_FASTOPEN" "$ac_includes_default
 #include <netinet/tcp.h>
 
-"
-if test "x$ac_cv_have_decl_MSG_FASTOPEN" = xyes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&5
-$as_echo "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&2;}
-else
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_MSG_FASTOPEN" = xyes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&5
+printf "%s\n" "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&2;}
+else $as_nop
   as_fn_error $? "TCP Fast Open is not available for client mode: please rerun without --enable-tfo-client" "$LINENO" 5
 fi
 
-
-cat >>confdefs.h <<_ACEOF
-#define USE_MSG_FASTOPEN 1
-_ACEOF
+printf "%s\n" "#define USE_MSG_FASTOPEN 1" >>confdefs.h
 
 				;;
-			darwin*) ac_fn_c_check_decl "$LINENO" "CONNECT_RESUME_ON_READ_WRITE" "ac_cv_have_decl_CONNECT_RESUME_ON_READ_WRITE" "$ac_includes_default
+			darwin*) ac_fn_check_decl "$LINENO" "CONNECT_RESUME_ON_READ_WRITE" "ac_cv_have_decl_CONNECT_RESUME_ON_READ_WRITE" "$ac_includes_default
 #include <sys/socket.h>
 
-"
-if test "x$ac_cv_have_decl_CONNECT_RESUME_ON_READ_WRITE" = xyes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&5
-$as_echo "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&2;}
-else
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_CONNECT_RESUME_ON_READ_WRITE" = xyes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&5
+printf "%s\n" "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support client mode TFO" >&2;}
+else $as_nop
   as_fn_error $? "TCP Fast Open is not available for client mode: please rerun without --enable-tfo-client" "$LINENO" 5
 fi
 
-
-cat >>confdefs.h <<_ACEOF
-#define USE_OSX_MSG_FASTOPEN 1
-_ACEOF
+printf "%s\n" "#define USE_OSX_MSG_FASTOPEN 1" >>confdefs.h
 
 				;;
 		esac
@@ -19328,27 +21506,26 @@ _ACEOF
 esac
 
 # Check whether --enable-tfo-server was given.
-if test "${enable_tfo_server+set}" = set; then :
+if test ${enable_tfo_server+y}
+then :
   enableval=$enable_tfo_server;
 fi
 
 case "$enable_tfo_server" in
 	yes)
-	      ac_fn_c_check_decl "$LINENO" "TCP_FASTOPEN" "ac_cv_have_decl_TCP_FASTOPEN" "$ac_includes_default
+	      ac_fn_check_decl "$LINENO" "TCP_FASTOPEN" "ac_cv_have_decl_TCP_FASTOPEN" "$ac_includes_default
 #include <netinet/tcp.h>
 
-"
-if test "x$ac_cv_have_decl_TCP_FASTOPEN" = xyes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support server mode TFO" >&5
-$as_echo "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support server mode TFO" >&2;}
-else
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_TCP_FASTOPEN" = xyes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support server mode TFO" >&5
+printf "%s\n" "$as_me: WARNING: Check the platform specific TFO kernel parameters are correctly configured to support server mode TFO" >&2;}
+else $as_nop
   as_fn_error $? "TCP Fast Open is not available for server mode: please rerun without --enable-tfo-server" "$LINENO" 5
 fi
 
-
-cat >>confdefs.h <<_ACEOF
-#define USE_TCP_FASTOPEN 1
-_ACEOF
+printf "%s\n" "#define USE_TCP_FASTOPEN 1" >>confdefs.h
 
 		;;
 	no|*)
@@ -19358,18 +21535,19 @@ esac
 # check for libevent
 
 # Check whether --with-libevent was given.
-if test "${with_libevent+set}" = set; then :
+if test ${with_libevent+y}
+then :
   withval=$with_libevent;
-else
+else $as_nop
    with_libevent="no"
 fi
 
 if test "x_$with_libevent" != x_no; then
 
-$as_echo "#define USE_LIBEVENT 1" >>confdefs.h
+printf "%s\n" "#define USE_LIBEVENT 1" >>confdefs.h
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libevent" >&5
-$as_echo_n "checking for libevent... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libevent" >&5
+printf %s "checking for libevent... " >&6; }
         if test "x_$with_libevent" = x_ -o "x_$with_libevent" = x_yes; then
             with_libevent="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
         fi
@@ -19386,8 +21564,8 @@ $as_echo_n "checking for libevent... " >&6; }
         if test x_$found_libevent != x_yes; then
 		if test -f "$dir/event.h" -a \( -f "$dir/libevent.la" -o -f "$dir/libev.la" \) ; then
 			# libevent source directory
-			{ $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $thedir" >&5
-$as_echo "found in $thedir" >&6; }
+			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $thedir" >&5
+printf "%s\n" "found in $thedir" >&6; }
 			CPPFLAGS="$CPPFLAGS -I$thedir -I$thedir/include"
 			BAK_LDFLAGS_SET="1"
 			BAK_LDFLAGS="$LDFLAGS"
@@ -19410,8 +21588,8 @@ Please note that this alternative is not as capable as libevent when using
 large outgoing port ranges.  " "$LINENO" 5
 		fi
         else
-            { $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $thedir" >&5
-$as_echo "found in $thedir" >&6; }
+            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $thedir" >&5
+printf "%s\n" "found in $thedir" >&6; }
 	    	    if test ! -f $thedir/lib/libevent.a -a ! -f $thedir/lib/libevent.so -a -d "$thedir/lib/event2"; then
 		    LDFLAGS="$LDFLAGS -L$thedir/lib/event2"
 
@@ -19435,11 +21613,12 @@ $as_echo "found in $thedir" >&6; }
 	    fi
         fi
 	# check for library used by libevent after 1.3c
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
-$as_echo_n "checking for library containing clock_gettime... " >&6; }
-if ${ac_cv_search_clock_gettime+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+printf %s "checking for library containing clock_gettime... " >&6; }
+if test ${ac_cv_search_clock_gettime+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -19447,76 +21626,75 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char clock_gettime ();
 int
-main ()
+main (void)
 {
 return clock_gettime ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' rt; do
+for ac_lib in '' rt
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_clock_gettime=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_clock_gettime+:} false; then :
+  if test ${ac_cv_search_clock_gettime+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_clock_gettime+:} false; then :
+if test ${ac_cv_search_clock_gettime+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_clock_gettime=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
-$as_echo "$ac_cv_search_clock_gettime" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
+printf "%s\n" "$ac_cv_search_clock_gettime" >&6; }
 ac_res=$ac_cv_search_clock_gettime
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 	# is the event.h header libev or libevent?
-	for ac_header in event.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "event.h" "ac_cv_header_event_h" "$ac_includes_default
+	ac_fn_c_check_header_compile "$LINENO" "event.h" "ac_cv_header_event_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_event_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_H 1
-_ACEOF
+if test "x$ac_cv_header_event_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_H 1" >>confdefs.h
 
 fi
 
-done
-
-	ac_fn_c_check_decl "$LINENO" "EV_VERSION_MAJOR" "ac_cv_have_decl_EV_VERSION_MAJOR" "$ac_includes_default
+	ac_fn_check_decl "$LINENO" "EV_VERSION_MAJOR" "ac_cv_have_decl_EV_VERSION_MAJOR" "$ac_includes_default
 #include <event.h>
 
-"
-if test "x$ac_cv_have_decl_EV_VERSION_MAJOR" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_EV_VERSION_MAJOR" = xyes
+then :
 
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing event_set" >&5
-$as_echo_n "checking for library containing event_set... " >&6; }
-if ${ac_cv_search_event_set+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing event_set" >&5
+printf %s "checking for library containing event_set... " >&6; }
+if test ${ac_cv_search_event_set+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -19524,58 +21702,61 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char event_set ();
 int
-main ()
+main (void)
 {
 return event_set ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' ev; do
+for ac_lib in '' ev
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_event_set=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_event_set+:} false; then :
+  if test ${ac_cv_search_event_set+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_event_set+:} false; then :
+if test ${ac_cv_search_event_set+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_event_set=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_event_set" >&5
-$as_echo "$ac_cv_search_event_set" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_event_set" >&5
+printf "%s\n" "$ac_cv_search_event_set" >&6; }
 ac_res=$ac_cv_search_event_set
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
-else
+else $as_nop
 
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing event_set" >&5
-$as_echo_n "checking for library containing event_set... " >&6; }
-if ${ac_cv_search_event_set+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing event_set" >&5
+printf %s "checking for library containing event_set... " >&6; }
+if test ${ac_cv_search_event_set+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -19583,147 +21764,118 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char event_set ();
 int
-main ()
+main (void)
 {
 return event_set ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' event; do
+for ac_lib in '' event
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_event_set=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_event_set+:} false; then :
+  if test ${ac_cv_search_event_set+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_event_set+:} false; then :
+if test ${ac_cv_search_event_set+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_event_set=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_event_set" >&5
-$as_echo "$ac_cv_search_event_set" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_event_set" >&5
+printf "%s\n" "$ac_cv_search_event_set" >&6; }
 ac_res=$ac_cv_search_event_set
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
 
 fi
-
-	for ac_func in event_base_free
-do :
-  ac_fn_c_check_func "$LINENO" "event_base_free" "ac_cv_func_event_base_free"
-if test "x$ac_cv_func_event_base_free" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_BASE_FREE 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "event_base_free" "ac_cv_func_event_base_free"
+if test "x$ac_cv_func_event_base_free" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_BASE_FREE 1" >>confdefs.h
 
 fi
-done
  # only in libevent 1.2 and later
-	for ac_func in event_base_once
-do :
-  ac_fn_c_check_func "$LINENO" "event_base_once" "ac_cv_func_event_base_once"
-if test "x$ac_cv_func_event_base_once" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_BASE_ONCE 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "event_base_once" "ac_cv_func_event_base_once"
+if test "x$ac_cv_func_event_base_once" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_BASE_ONCE 1" >>confdefs.h
 
 fi
-done
  # only in libevent 1.4.1 and later
-	for ac_func in event_base_new
-do :
-  ac_fn_c_check_func "$LINENO" "event_base_new" "ac_cv_func_event_base_new"
-if test "x$ac_cv_func_event_base_new" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_BASE_NEW 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "event_base_new" "ac_cv_func_event_base_new"
+if test "x$ac_cv_func_event_base_new" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_BASE_NEW 1" >>confdefs.h
 
 fi
-done
  # only in libevent 1.4.1 and later
-	for ac_func in event_base_get_method
-do :
-  ac_fn_c_check_func "$LINENO" "event_base_get_method" "ac_cv_func_event_base_get_method"
-if test "x$ac_cv_func_event_base_get_method" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_BASE_GET_METHOD 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "event_base_get_method" "ac_cv_func_event_base_get_method"
+if test "x$ac_cv_func_event_base_get_method" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_BASE_GET_METHOD 1" >>confdefs.h
 
 fi
-done
  # only in libevent 1.4.3 and later
-	for ac_func in ev_loop
-do :
-  ac_fn_c_check_func "$LINENO" "ev_loop" "ac_cv_func_ev_loop"
-if test "x$ac_cv_func_ev_loop" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EV_LOOP 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "ev_loop" "ac_cv_func_ev_loop"
+if test "x$ac_cv_func_ev_loop" = xyes
+then :
+  printf "%s\n" "#define HAVE_EV_LOOP 1" >>confdefs.h
 
 fi
-done
  # only in libev. (tested on 3.51)
-	for ac_func in ev_default_loop
-do :
-  ac_fn_c_check_func "$LINENO" "ev_default_loop" "ac_cv_func_ev_default_loop"
-if test "x$ac_cv_func_ev_default_loop" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EV_DEFAULT_LOOP 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "ev_default_loop" "ac_cv_func_ev_default_loop"
+if test "x$ac_cv_func_ev_default_loop" = xyes
+then :
+  printf "%s\n" "#define HAVE_EV_DEFAULT_LOOP 1" >>confdefs.h
 
 fi
-done
  # only in libev. (tested on 4.00)
-	for ac_func in event_assign
-do :
-  ac_fn_c_check_func "$LINENO" "event_assign" "ac_cv_func_event_assign"
-if test "x$ac_cv_func_event_assign" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EVENT_ASSIGN 1
-_ACEOF
+	ac_fn_c_check_func "$LINENO" "event_assign" "ac_cv_func_event_assign"
+if test "x$ac_cv_func_event_assign" = xyes
+then :
+  printf "%s\n" "#define HAVE_EVENT_ASSIGN 1" >>confdefs.h
 
 fi
-done
  # in libevent, for thread-safety
-	ac_fn_c_check_decl "$LINENO" "evsignal_assign" "ac_cv_have_decl_evsignal_assign" "$ac_includes_default
+	ac_fn_check_decl "$LINENO" "evsignal_assign" "ac_cv_have_decl_evsignal_assign" "$ac_includes_default
 #ifdef HAVE_EVENT_H
 #  include <event.h>
 #else
 #  include \"event2/event.h\"
 #endif
 
-"
-if test "x$ac_cv_have_decl_evsignal_assign" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_evsignal_assign" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_EVSIGNAL_ASSIGN $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_EVSIGNAL_ASSIGN $ac_have_decl" >>confdefs.h
 
         PC_LIBEVENT_DEPENDENCY="libevent"
 
@@ -19732,21 +21884,22 @@ _ACEOF
 	fi
 else
 
-$as_echo "#define USE_MINI_EVENT 1" >>confdefs.h
+printf "%s\n" "#define USE_MINI_EVENT 1" >>confdefs.h
 
 fi
 
 # check for libexpat
 
 # Check whether --with-libexpat was given.
-if test "${with_libexpat+set}" = set; then :
+if test ${with_libexpat+y}
+then :
   withval=$with_libexpat;
-else
+else $as_nop
    withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libexpat" >&5
-$as_echo_n "checking for libexpat... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libexpat" >&5
+printf %s "checking for libexpat... " >&6; }
 found_libexpat="no"
 for dir in $withval ; do
             if test -f "$dir/include/expat.h"; then
@@ -19755,55 +21908,49 @@ for dir in $withval ; do
                     CPPFLAGS="$CPPFLAGS -I$dir/include"
 		    LDFLAGS="$LDFLAGS -L$dir/lib"
 		fi
-            	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
-$as_echo "found in $dir" >&6; }
+            	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
+printf "%s\n" "found in $dir" >&6; }
                 break;
             fi
 done
 if test x_$found_libexpat != x_yes; then
 	as_fn_error $? "Could not find libexpat, expat.h" "$LINENO" 5
 fi
-for ac_header in expat.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "expat.h" "ac_cv_header_expat_h" "$ac_includes_default
+ac_fn_c_check_header_compile "$LINENO" "expat.h" "ac_cv_header_expat_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_expat_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_EXPAT_H 1
-_ACEOF
+if test "x$ac_cv_header_expat_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_EXPAT_H 1" >>confdefs.h
 
 fi
 
-done
-
-ac_fn_c_check_decl "$LINENO" "XML_StopParser" "ac_cv_have_decl_XML_StopParser" "$ac_includes_default
+ac_fn_check_decl "$LINENO" "XML_StopParser" "ac_cv_have_decl_XML_StopParser" "$ac_includes_default
 #include <expat.h>
 
-"
-if test "x$ac_cv_have_decl_XML_StopParser" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_XML_StopParser" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_XML_STOPPARSER $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_XML_STOPPARSER $ac_have_decl" >>confdefs.h
 
 
 # hiredis (redis C client for cachedb)
 
 # Check whether --with-libhiredis was given.
-if test "${with_libhiredis+set}" = set; then :
+if test ${with_libhiredis+y}
+then :
   withval=$with_libhiredis;
-else
+else $as_nop
    withval="no"
 fi
 
 found_libhiredis="no"
 if test x_$withval = x_yes -o x_$withval != x_no; then
-   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libhiredis" >&5
-$as_echo_n "checking for libhiredis... " >&6; }
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libhiredis" >&5
+printf %s "checking for libhiredis... " >&6; }
    if test x_$withval = x_ -o x_$withval = x_yes; then
             withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
    fi
@@ -19814,10 +21961,10 @@ $as_echo_n "checking for libhiredis... " >&6; }
                     CPPFLAGS="$CPPFLAGS -I$dir/include"
 		    LDFLAGS="$LDFLAGS -L$dir/lib"
 		fi
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
-$as_echo "found in $dir" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
+printf "%s\n" "found in $dir" >&6; }
 
-$as_echo "#define USE_REDIS 1" >>confdefs.h
+printf "%s\n" "#define USE_REDIS 1" >>confdefs.h
 
 		LIBS="$LIBS -lhiredis"
                 break;
@@ -19826,48 +21973,42 @@ $as_echo "#define USE_REDIS 1" >>confdefs.h
     if test x_$found_libhiredis != x_yes; then
 	as_fn_error $? "Could not find libhiredis, hiredis.h" "$LINENO" 5
     fi
-    for ac_header in hiredis/hiredis.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "hiredis/hiredis.h" "ac_cv_header_hiredis_hiredis_h" "$ac_includes_default
+    ac_fn_c_check_header_compile "$LINENO" "hiredis/hiredis.h" "ac_cv_header_hiredis_hiredis_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_hiredis_hiredis_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_HIREDIS_HIREDIS_H 1
-_ACEOF
+if test "x$ac_cv_header_hiredis_hiredis_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_HIREDIS_HIREDIS_H 1" >>confdefs.h
 
 fi
 
-done
-
-    ac_fn_c_check_decl "$LINENO" "redisConnect" "ac_cv_have_decl_redisConnect" "$ac_includes_default
+    ac_fn_check_decl "$LINENO" "redisConnect" "ac_cv_have_decl_redisConnect" "$ac_includes_default
     #include <hiredis/hiredis.h>
 
-"
-if test "x$ac_cv_have_decl_redisConnect" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_redisConnect" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_REDISCONNECT $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_REDISCONNECT $ac_have_decl" >>confdefs.h
 
 fi
 
 # nghttp2
 
 # Check whether --with-libnghttp2 was given.
-if test "${with_libnghttp2+set}" = set; then :
+if test ${with_libnghttp2+y}
+then :
   withval=$with_libnghttp2;
-else
+else $as_nop
    withval="no"
 fi
 
 found_libnghttp2="no"
 if test x_$withval = x_yes -o x_$withval != x_no; then
-   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libnghttp2" >&5
-$as_echo_n "checking for libnghttp2... " >&6; }
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libnghttp2" >&5
+printf %s "checking for libnghttp2... " >&6; }
    if test x_$withval = x_ -o x_$withval = x_yes; then
             withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
    fi
@@ -19878,10 +22019,10 @@ $as_echo_n "checking for libnghttp2... " >&6; }
                     CPPFLAGS="$CPPFLAGS -I$dir/include"
 		    LDFLAGS="$LDFLAGS -L$dir/lib"
 		fi
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
-$as_echo "found in $dir" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
+printf "%s\n" "found in $dir" >&6; }
 
-$as_echo "#define HAVE_NGHTTP2 1" >>confdefs.h
+printf "%s\n" "#define HAVE_NGHTTP2 1" >>confdefs.h
 
 		LIBS="$LIBS -lnghttp2"
                 break;
@@ -19890,32 +22031,25 @@ $as_echo "#define HAVE_NGHTTP2 1" >>confdefs.h
     if test x_$found_libnghttp2 != x_yes; then
 	as_fn_error $? "Could not find libnghttp2, nghttp2.h" "$LINENO" 5
     fi
-    for ac_header in nghttp2/nghttp2.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "nghttp2/nghttp2.h" "ac_cv_header_nghttp2_nghttp2_h" "$ac_includes_default
+    ac_fn_c_check_header_compile "$LINENO" "nghttp2/nghttp2.h" "ac_cv_header_nghttp2_nghttp2_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_nghttp2_nghttp2_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_NGHTTP2_NGHTTP2_H 1
-_ACEOF
+if test "x$ac_cv_header_nghttp2_nghttp2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGHTTP2_NGHTTP2_H 1" >>confdefs.h
 
 fi
 
-done
-
-    ac_fn_c_check_decl "$LINENO" "nghttp2_session_server_new" "ac_cv_have_decl_nghttp2_session_server_new" "$ac_includes_default
+    ac_fn_check_decl "$LINENO" "nghttp2_session_server_new" "ac_cv_have_decl_nghttp2_session_server_new" "$ac_includes_default
     #include <nghttp2/nghttp2.h>
 
-"
-if test "x$ac_cv_have_decl_nghttp2_session_server_new" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_nghttp2_session_server_new" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_NGHTTP2_SESSION_SERVER_NEW $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_NGHTTP2_SESSION_SERVER_NEW $ac_have_decl" >>confdefs.h
 
 fi
 
@@ -19923,7 +22057,8 @@ fi
 
 staticexe=""
 # Check whether --enable-static-exe was given.
-if test "${enable_static_exe+set}" = set; then :
+if test ${enable_static_exe+y}
+then :
   enableval=$enable_static_exe;
 fi
 
@@ -19937,11 +22072,12 @@ if test x_$enable_static_exe = x_yes; then
 		else
 			LIBS="$LIBS -lgdi32"
 		fi
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compress in -lz" >&5
-$as_echo_n "checking for compress in -lz... " >&6; }
-if ${ac_cv_lib_z_compress+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for compress in -lz" >&5
+printf %s "checking for compress in -lz... " >&6; }
+if test ${ac_cv_lib_z_compress+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lz  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -19950,30 +22086,29 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char compress ();
 int
-main ()
+main (void)
 {
 return compress ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_z_compress=yes
-else
+else $as_nop
   ac_cv_lib_z_compress=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_compress" >&5
-$as_echo "$ac_cv_lib_z_compress" >&6; }
-if test "x$ac_cv_lib_z_compress" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_compress" >&5
+printf "%s\n" "$ac_cv_lib_z_compress" >&6; }
+if test "x$ac_cv_lib_z_compress" = xyes
+then :
    LIBS="$LIBS -lz"
 fi
 
@@ -19987,7 +22122,8 @@ fi
 
 # set full static linking if requested
 # Check whether --enable-fully-static was given.
-if test "${enable_fully_static+set}" = set; then :
+if test ${enable_fully_static+y}
+then :
   enableval=$enable_fully_static;
 fi
 
@@ -20000,11 +22136,12 @@ if test x_$enable_fully_static = x_yes; then
 		else
 			LIBS="$LIBS -lgdi32"
 		fi
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for compress in -lz" >&5
-$as_echo_n "checking for compress in -lz... " >&6; }
-if ${ac_cv_lib_z_compress+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for compress in -lz" >&5
+printf %s "checking for compress in -lz... " >&6; }
+if test ${ac_cv_lib_z_compress+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lz  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -20013,30 +22150,29 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char compress ();
 int
-main ()
+main (void)
 {
 return compress ();
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_lib_z_compress=yes
-else
+else $as_nop
   ac_cv_lib_z_compress=no
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_compress" >&5
-$as_echo "$ac_cv_lib_z_compress" >&6; }
-if test "x$ac_cv_lib_z_compress" = xyes; then :
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_compress" >&5
+printf "%s\n" "$ac_cv_lib_z_compress" >&6; }
+if test "x$ac_cv_lib_z_compress" = xyes
+then :
    LIBS="$LIBS -lz"
 fi
 
@@ -20050,21 +22186,22 @@ fi
 
 # set lock checking if requested
 # Check whether --enable-lock_checks was given.
-if test "${enable_lock_checks+set}" = set; then :
+if test ${enable_lock_checks+y}
+then :
   enableval=$enable_lock_checks;
 fi
 
 if test x_$enable_lock_checks = x_yes; then
 
-$as_echo "#define ENABLE_LOCK_CHECKS 1" >>confdefs.h
+printf "%s\n" "#define ENABLE_LOCK_CHECKS 1" >>confdefs.h
 
 	CHECKLOCK_OBJ="checklocks.lo"
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for getaddrinfo" >&5
-$as_echo_n "checking for getaddrinfo... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for getaddrinfo" >&5
+printf %s "checking for getaddrinfo... " >&6; }
 ac_cv_func_getaddrinfo=no
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -20084,11 +22221,12 @@ int main(void) {
 }
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_func_getaddrinfo="yes"
 if test "$ac_cv_header_windows_h" = "yes"; then
 
-$as_echo "#define USE_WINSOCK 1" >>confdefs.h
+printf "%s\n" "#define USE_WINSOCK 1" >>confdefs.h
 
 	USE_WINSOCK="1"
 	if echo "$LIBS" | grep 'lws2_32' >/dev/null; then
@@ -20098,7 +22236,7 @@ $as_echo "#define USE_WINSOCK 1" >>confdefs.h
 	fi
 fi
 
-else
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -20107,7 +22245,7 @@ else
 #endif
 
 int
-main ()
+main (void)
 {
 
         (void)getaddrinfo(NULL, NULL, NULL, NULL);
@@ -20117,15 +22255,16 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 ac_cv_func_getaddrinfo="yes"
 
-$as_echo "#define USE_WINSOCK 1" >>confdefs.h
+printf "%s\n" "#define USE_WINSOCK 1" >>confdefs.h
 
 USE_WINSOCK="1"
 
-else
+else $as_nop
   ORIGLIBS="$LIBS"
 LIBS="$LIBS -lws2_32"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -20136,7 +22275,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #endif
 
 int
-main ()
+main (void)
 {
 
         (void)getaddrinfo(NULL, NULL, NULL, NULL);
@@ -20146,66 +22285,63 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
 ac_cv_func_getaddrinfo="yes"
 
-$as_echo "#define USE_WINSOCK 1" >>confdefs.h
+printf "%s\n" "#define USE_WINSOCK 1" >>confdefs.h
 
 USE_WINSOCK="1"
 
-else
+else $as_nop
 
 ac_cv_func_getaddrinfo="no"
 LIBS="$ORIGLIBS"
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_getaddrinfo" >&5
-$as_echo "$ac_cv_func_getaddrinfo" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_getaddrinfo" >&5
+printf "%s\n" "$ac_cv_func_getaddrinfo" >&6; }
 if test $ac_cv_func_getaddrinfo = yes; then
 
-$as_echo "#define HAVE_GETADDRINFO 1" >>confdefs.h
+printf "%s\n" "#define HAVE_GETADDRINFO 1" >>confdefs.h
 
 fi
 
 if test "$USE_WINSOCK" = 1; then
 
-$as_echo "#define UB_ON_WINDOWS 1" >>confdefs.h
+printf "%s\n" "#define UB_ON_WINDOWS 1" >>confdefs.h
 
-	for ac_header in iphlpapi.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "iphlpapi.h" "ac_cv_header_iphlpapi_h" "$ac_includes_default
+	ac_fn_c_check_header_compile "$LINENO" "iphlpapi.h" "ac_cv_header_iphlpapi_h" "$ac_includes_default
 #include <windows.h>
 
 "
-if test "x$ac_cv_header_iphlpapi_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_IPHLPAPI_H 1
-_ACEOF
+if test "x$ac_cv_header_iphlpapi_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_IPHLPAPI_H 1" >>confdefs.h
 
 fi
 
-done
-
 	if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}windres", so it can be a program name with args.
 set dummy ${ac_tool_prefix}windres; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_WINDRES+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_WINDRES+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$WINDRES"; then
   ac_cv_prog_WINDRES="$WINDRES" # Let the user override the test.
 else
@@ -20213,11 +22349,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_WINDRES="${ac_tool_prefix}windres"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -20228,11 +22368,11 @@ fi
 fi
 WINDRES=$ac_cv_prog_WINDRES
 if test -n "$WINDRES"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $WINDRES" >&5
-$as_echo "$WINDRES" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $WINDRES" >&5
+printf "%s\n" "$WINDRES" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -20241,11 +22381,12 @@ if test -z "$ac_cv_prog_WINDRES"; then
   ac_ct_WINDRES=$WINDRES
   # Extract the first word of "windres", so it can be a program name with args.
 set dummy windres; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_WINDRES+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_prog_ac_ct_WINDRES+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   if test -n "$ac_ct_WINDRES"; then
   ac_cv_prog_ac_ct_WINDRES="$ac_ct_WINDRES" # Let the user override the test.
 else
@@ -20253,11 +22394,15 @@ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
     ac_cv_prog_ac_ct_WINDRES="windres"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -20268,11 +22413,11 @@ fi
 fi
 ac_ct_WINDRES=$ac_cv_prog_ac_ct_WINDRES
 if test -n "$ac_ct_WINDRES"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_WINDRES" >&5
-$as_echo "$ac_ct_WINDRES" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_WINDRES" >&5
+printf "%s\n" "$ac_ct_WINDRES" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
   if test "x$ac_ct_WINDRES" = x; then
@@ -20280,8 +22425,8 @@ fi
   else
     case $cross_compiling:$ac_tool_warned in
 yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+printf "%s\n" "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
 ac_tool_warned=yes ;;
 esac
     WINDRES=$ac_ct_WINDRES
@@ -20312,7 +22457,7 @@ fi
 	WIN_CHECKCONF_OBJ_LINK="rsrc_unbound_checkconf.o"
 
 
-$as_echo "#define __USE_MINGW_ANSI_STDIO 1" >>confdefs.h
+printf "%s\n" "#define __USE_MINGW_ANSI_STDIO 1" >>confdefs.h
 
 fi
 if test $ac_cv_func_getaddrinfo = no; then
@@ -20326,8 +22471,8 @@ fi
 # check after getaddrinfo for its libraries
 
 # check ioctlsocket
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ioctlsocket" >&5
-$as_echo_n "checking for ioctlsocket... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ioctlsocket" >&5
+printf %s "checking for ioctlsocket... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -20336,7 +22481,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #endif
 
 int
-main ()
+main (void)
 {
 
 	(void)ioctlsocket(0, 0, NULL);
@@ -20345,43 +22490,41 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_c_try_link "$LINENO"
+then :
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_IOCTLSOCKET 1" >>confdefs.h
+printf "%s\n" "#define HAVE_IOCTLSOCKET 1" >>confdefs.h
 
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
 
 # see if daemon(3) exists, and if it is deprecated.
-for ac_func in daemon
-do :
-  ac_fn_c_check_func "$LINENO" "daemon" "ac_cv_func_daemon"
-if test "x$ac_cv_func_daemon" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_DAEMON 1
-_ACEOF
+ac_fn_c_check_func "$LINENO" "daemon" "ac_cv_func_daemon"
+if test "x$ac_cv_func_daemon" = xyes
+then :
+  printf "%s\n" "#define HAVE_DAEMON 1" >>confdefs.h
 
 fi
-done
 
 if test $ac_cv_func_daemon = yes; then
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if daemon is deprecated" >&5
-$as_echo_n "checking if daemon is deprecated... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if daemon is deprecated" >&5
+printf %s "checking if daemon is deprecated... " >&6; }
 cache=`echo daemon | sed 'y%.=/+-%___p_%'`
-if eval \${cv_cc_deprecated_$cache+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+if eval test \${cv_cc_deprecated_$cache+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
 
 echo '
 #include <stdlib.h>
@@ -20398,18 +22541,16 @@ rm -f conftest conftest.o conftest.c
 fi
 
 if eval "test \"`echo '$cv_cc_deprecated_'$cache`\" = yes"; then
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-cat >>confdefs.h <<_ACEOF
-#define DEPRECATED_DAEMON 1
-_ACEOF
+printf "%s\n" "#define DEPRECATED_DAEMON 1" >>confdefs.h
 
 :
 
 else
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 :
 
 fi
@@ -20423,11 +22564,10 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_member_struct_sockaddr_un_sun_len" = xyes; then :
+if test "x$ac_cv_member_struct_sockaddr_un_sun_len" = xyes
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 1
-_ACEOF
+printf "%s\n" "#define HAVE_STRUCT_SOCKADDR_UN_SUN_LEN 1" >>confdefs.h
 
 
 fi
@@ -20467,18 +22607,17 @@ $ac_includes_default
 #endif
 
 "
-if test "x$ac_cv_member_struct_in_pktinfo_ipi_spec_dst" = xyes; then :
+if test "x$ac_cv_member_struct_in_pktinfo_ipi_spec_dst" = xyes
+then :
 
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST 1
-_ACEOF
+printf "%s\n" "#define HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST 1" >>confdefs.h
 
 
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for htobe64" >&5
-$as_echo_n "checking for htobe64... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for htobe64" >&5
+printf %s "checking for htobe64... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -20491,28 +22630,29 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #endif
 
 int
-main ()
+main (void)
 {
 unsigned long long x = htobe64(0); printf("%u", (unsigned)x);
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+if ac_fn_c_try_link "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_HTOBE64 1" >>confdefs.h
+printf "%s\n" "#define HAVE_HTOBE64 1" >>confdefs.h
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for be64toh" >&5
-$as_echo_n "checking for be64toh... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for be64toh" >&5
+printf %s "checking for be64toh... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -20525,31 +22665,33 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 #endif
 
 int
-main ()
+main (void)
 {
 unsigned long long x = be64toh(0); printf("%u", (unsigned)x);
   ;
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+if ac_fn_c_try_link "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_BE64TOH 1" >>confdefs.h
+printf "%s\n" "#define HAVE_BE64TOH 1" >>confdefs.h
 
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+else $as_nop
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing setusercontext" >&5
-$as_echo_n "checking for library containing setusercontext... " >&6; }
-if ${ac_cv_search_setusercontext+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing setusercontext" >&5
+printf %s "checking for library containing setusercontext... " >&6; }
+if test ${ac_cv_search_setusercontext+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -20557,116 +22699,303 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char setusercontext ();
 int
-main ()
+main (void)
 {
 return setusercontext ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' util; do
+for ac_lib in '' util
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_setusercontext=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_setusercontext+:} false; then :
+  if test ${ac_cv_search_setusercontext+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_setusercontext+:} false; then :
+if test ${ac_cv_search_setusercontext+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_setusercontext=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_setusercontext" >&5
-$as_echo "$ac_cv_search_setusercontext" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_setusercontext" >&5
+printf "%s\n" "$ac_cv_search_setusercontext" >&6; }
 ac_res=$ac_cv_search_setusercontext
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
 
-for ac_func in tzset sigprocmask fcntl getpwnam endpwent getrlimit setrlimit setsid chroot kill chown sleep usleep random srandom recvmsg sendmsg writev socketpair glob initgroups strftime localtime_r setusercontext _beginthreadex endservent endprotoent fsync shmget accept4 getifaddrs if_nametoindex poll gettid
-do :
-  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
+ac_fn_c_check_func "$LINENO" "tzset" "ac_cv_func_tzset"
+if test "x$ac_cv_func_tzset" = xyes
+then :
+  printf "%s\n" "#define HAVE_TZSET 1" >>confdefs.h
 
 fi
-done
+ac_fn_c_check_func "$LINENO" "sigprocmask" "ac_cv_func_sigprocmask"
+if test "x$ac_cv_func_sigprocmask" = xyes
+then :
+  printf "%s\n" "#define HAVE_SIGPROCMASK 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "fcntl" "ac_cv_func_fcntl"
+if test "x$ac_cv_func_fcntl" = xyes
+then :
+  printf "%s\n" "#define HAVE_FCNTL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "getpwnam" "ac_cv_func_getpwnam"
+if test "x$ac_cv_func_getpwnam" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETPWNAM 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "endpwent" "ac_cv_func_endpwent"
+if test "x$ac_cv_func_endpwent" = xyes
+then :
+  printf "%s\n" "#define HAVE_ENDPWENT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "getrlimit" "ac_cv_func_getrlimit"
+if test "x$ac_cv_func_getrlimit" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETRLIMIT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "setrlimit" "ac_cv_func_setrlimit"
+if test "x$ac_cv_func_setrlimit" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETRLIMIT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "setsid" "ac_cv_func_setsid"
+if test "x$ac_cv_func_setsid" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETSID 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "chroot" "ac_cv_func_chroot"
+if test "x$ac_cv_func_chroot" = xyes
+then :
+  printf "%s\n" "#define HAVE_CHROOT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "kill" "ac_cv_func_kill"
+if test "x$ac_cv_func_kill" = xyes
+then :
+  printf "%s\n" "#define HAVE_KILL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "chown" "ac_cv_func_chown"
+if test "x$ac_cv_func_chown" = xyes
+then :
+  printf "%s\n" "#define HAVE_CHOWN 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "sleep" "ac_cv_func_sleep"
+if test "x$ac_cv_func_sleep" = xyes
+then :
+  printf "%s\n" "#define HAVE_SLEEP 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "usleep" "ac_cv_func_usleep"
+if test "x$ac_cv_func_usleep" = xyes
+then :
+  printf "%s\n" "#define HAVE_USLEEP 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "random" "ac_cv_func_random"
+if test "x$ac_cv_func_random" = xyes
+then :
+  printf "%s\n" "#define HAVE_RANDOM 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "srandom" "ac_cv_func_srandom"
+if test "x$ac_cv_func_srandom" = xyes
+then :
+  printf "%s\n" "#define HAVE_SRANDOM 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "recvmsg" "ac_cv_func_recvmsg"
+if test "x$ac_cv_func_recvmsg" = xyes
+then :
+  printf "%s\n" "#define HAVE_RECVMSG 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "sendmsg" "ac_cv_func_sendmsg"
+if test "x$ac_cv_func_sendmsg" = xyes
+then :
+  printf "%s\n" "#define HAVE_SENDMSG 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "writev" "ac_cv_func_writev"
+if test "x$ac_cv_func_writev" = xyes
+then :
+  printf "%s\n" "#define HAVE_WRITEV 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "socketpair" "ac_cv_func_socketpair"
+if test "x$ac_cv_func_socketpair" = xyes
+then :
+  printf "%s\n" "#define HAVE_SOCKETPAIR 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "glob" "ac_cv_func_glob"
+if test "x$ac_cv_func_glob" = xyes
+then :
+  printf "%s\n" "#define HAVE_GLOB 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "initgroups" "ac_cv_func_initgroups"
+if test "x$ac_cv_func_initgroups" = xyes
+then :
+  printf "%s\n" "#define HAVE_INITGROUPS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "strftime" "ac_cv_func_strftime"
+if test "x$ac_cv_func_strftime" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRFTIME 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "localtime_r" "ac_cv_func_localtime_r"
+if test "x$ac_cv_func_localtime_r" = xyes
+then :
+  printf "%s\n" "#define HAVE_LOCALTIME_R 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "setusercontext" "ac_cv_func_setusercontext"
+if test "x$ac_cv_func_setusercontext" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETUSERCONTEXT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "_beginthreadex" "ac_cv_func__beginthreadex"
+if test "x$ac_cv_func__beginthreadex" = xyes
+then :
+  printf "%s\n" "#define HAVE__BEGINTHREADEX 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "endservent" "ac_cv_func_endservent"
+if test "x$ac_cv_func_endservent" = xyes
+then :
+  printf "%s\n" "#define HAVE_ENDSERVENT 1" >>confdefs.h
 
-for ac_func in setresuid
+fi
+ac_fn_c_check_func "$LINENO" "endprotoent" "ac_cv_func_endprotoent"
+if test "x$ac_cv_func_endprotoent" = xyes
+then :
+  printf "%s\n" "#define HAVE_ENDPROTOENT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "fsync" "ac_cv_func_fsync"
+if test "x$ac_cv_func_fsync" = xyes
+then :
+  printf "%s\n" "#define HAVE_FSYNC 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "shmget" "ac_cv_func_shmget"
+if test "x$ac_cv_func_shmget" = xyes
+then :
+  printf "%s\n" "#define HAVE_SHMGET 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "accept4" "ac_cv_func_accept4"
+if test "x$ac_cv_func_accept4" = xyes
+then :
+  printf "%s\n" "#define HAVE_ACCEPT4 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "getifaddrs" "ac_cv_func_getifaddrs"
+if test "x$ac_cv_func_getifaddrs" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETIFADDRS 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "if_nametoindex" "ac_cv_func_if_nametoindex"
+if test "x$ac_cv_func_if_nametoindex" = xyes
+then :
+  printf "%s\n" "#define HAVE_IF_NAMETOINDEX 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "poll" "ac_cv_func_poll"
+if test "x$ac_cv_func_poll" = xyes
+then :
+  printf "%s\n" "#define HAVE_POLL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "gettid" "ac_cv_func_gettid"
+if test "x$ac_cv_func_gettid" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETTID 1" >>confdefs.h
+
+fi
+
+
+  for ac_func in setresuid
 do :
   ac_fn_c_check_func "$LINENO" "setresuid" "ac_cv_func_setresuid"
-if test "x$ac_cv_func_setresuid" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SETRESUID 1
-_ACEOF
+if test "x$ac_cv_func_setresuid" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETRESUID 1" >>confdefs.h
 
-else
-  for ac_func in setreuid
-do :
+else $as_nop
   ac_fn_c_check_func "$LINENO" "setreuid" "ac_cv_func_setreuid"
-if test "x$ac_cv_func_setreuid" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SETREUID 1
-_ACEOF
+if test "x$ac_cv_func_setreuid" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETREUID 1" >>confdefs.h
 
 fi
-done
 
 fi
+
 done
 
-for ac_func in setresgid
+  for ac_func in setresgid
 do :
   ac_fn_c_check_func "$LINENO" "setresgid" "ac_cv_func_setresgid"
-if test "x$ac_cv_func_setresgid" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SETRESGID 1
-_ACEOF
+if test "x$ac_cv_func_setresgid" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETRESGID 1" >>confdefs.h
 
-else
-  for ac_func in setregid
-do :
+else $as_nop
   ac_fn_c_check_func "$LINENO" "setregid" "ac_cv_func_setregid"
-if test "x$ac_cv_func_setregid" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SETREGID 1
-_ACEOF
+if test "x$ac_cv_func_setregid" = xyes
+then :
+  printf "%s\n" "#define HAVE_SETREGID 1" >>confdefs.h
 
 fi
-done
 
 fi
-done
 
+done
 
 # check if setreuid en setregid fail, on MacOSX10.4(darwin8).
 if echo $host_os | grep darwin8 > /dev/null; then
 
-$as_echo "#define DARWIN_BROKEN_SETREUID 1" >>confdefs.h
+printf "%s\n" "#define DARWIN_BROKEN_SETREUID 1" >>confdefs.h
 
 fi
-ac_fn_c_check_decl "$LINENO" "inet_pton" "ac_cv_have_decl_inet_pton" "
+ac_fn_check_decl "$LINENO" "inet_pton" "ac_cv_have_decl_inet_pton" "
 $ac_includes_default
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
@@ -20688,17 +23017,15 @@ $ac_includes_default
 #include <ws2tcpip.h>
 #endif
 
-"
-if test "x$ac_cv_have_decl_inet_pton" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_inet_pton" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_INET_PTON $ac_have_decl
-_ACEOF
-ac_fn_c_check_decl "$LINENO" "inet_ntop" "ac_cv_have_decl_inet_ntop" "
+printf "%s\n" "#define HAVE_DECL_INET_PTON $ac_have_decl" >>confdefs.h
+ac_fn_check_decl "$LINENO" "inet_ntop" "ac_cv_have_decl_inet_ntop" "
 $ac_includes_default
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
@@ -20720,22 +23047,21 @@ $ac_includes_default
 #include <ws2tcpip.h>
 #endif
 
-"
-if test "x$ac_cv_have_decl_inet_ntop" = xyes; then :
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_inet_ntop" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_INET_NTOP $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_INET_NTOP $ac_have_decl" >>confdefs.h
 
 ac_fn_c_check_func "$LINENO" "inet_aton" "ac_cv_func_inet_aton"
-if test "x$ac_cv_func_inet_aton" = xyes; then :
-  $as_echo "#define HAVE_INET_ATON 1" >>confdefs.h
+if test "x$ac_cv_func_inet_aton" = xyes
+then :
+  printf "%s\n" "#define HAVE_INET_ATON 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" inet_aton.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS inet_aton.$ac_objext"
@@ -20744,12 +23070,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "inet_pton" "ac_cv_func_inet_pton"
-if test "x$ac_cv_func_inet_pton" = xyes; then :
-  $as_echo "#define HAVE_INET_PTON 1" >>confdefs.h
+if test "x$ac_cv_func_inet_pton" = xyes
+then :
+  printf "%s\n" "#define HAVE_INET_PTON 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" inet_pton.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS inet_pton.$ac_objext"
@@ -20758,12 +23084,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "inet_ntop" "ac_cv_func_inet_ntop"
-if test "x$ac_cv_func_inet_ntop" = xyes; then :
-  $as_echo "#define HAVE_INET_NTOP 1" >>confdefs.h
+if test "x$ac_cv_func_inet_ntop" = xyes
+then :
+  printf "%s\n" "#define HAVE_INET_NTOP 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" inet_ntop.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS inet_ntop.$ac_objext"
@@ -20772,12 +23098,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "snprintf" "ac_cv_func_snprintf"
-if test "x$ac_cv_func_snprintf" = xyes; then :
-  $as_echo "#define HAVE_SNPRINTF 1" >>confdefs.h
+if test "x$ac_cv_func_snprintf" = xyes
+then :
+  printf "%s\n" "#define HAVE_SNPRINTF 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" snprintf.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS snprintf.$ac_objext"
@@ -20786,16 +23112,16 @@ esac
 
 fi
 
-
 # test if snprintf return the proper length
 if test "x$ac_cv_func_snprintf" = xyes; then
     if test c${cross_compiling} = cno; then
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for correct snprintf return value" >&5
-$as_echo_n "checking for correct snprintf return value... " >&6; }
-	if test "$cross_compiling" = yes; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: maybe" >&5
-$as_echo "maybe" >&6; }
-else
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for correct snprintf return value" >&5
+printf %s "checking for correct snprintf return value... " >&6; }
+	if test "$cross_compiling" = yes
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: maybe" >&5
+printf "%s\n" "maybe" >&6; }
+else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
@@ -20803,15 +23129,16 @@ $ac_includes_default
 int main(void) { return !(snprintf(NULL, 0, "test") == 4); }
 
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
+if ac_fn_c_try_run "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+else $as_nop
 
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
-$as_echo "#define SNPRINTF_RET_BROKEN /**/" >>confdefs.h
+printf "%s\n" "#define SNPRINTF_RET_BROKEN /**/" >>confdefs.h
 
 		case " $LIBOBJS " in
   *" snprintf.$ac_objext "* ) ;;
@@ -20828,10 +23155,11 @@ fi
     fi
 fi
 ac_fn_c_check_func "$LINENO" "strlcat" "ac_cv_func_strlcat"
-if test "x$ac_cv_func_strlcat" = xyes; then :
-  $as_echo "#define HAVE_STRLCAT 1" >>confdefs.h
+if test "x$ac_cv_func_strlcat" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRLCAT 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" strlcat.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS strlcat.$ac_objext"
@@ -20840,12 +23168,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "strlcpy" "ac_cv_func_strlcpy"
-if test "x$ac_cv_func_strlcpy" = xyes; then :
-  $as_echo "#define HAVE_STRLCPY 1" >>confdefs.h
+if test "x$ac_cv_func_strlcpy" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRLCPY 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" strlcpy.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS strlcpy.$ac_objext"
@@ -20854,12 +23182,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "memmove" "ac_cv_func_memmove"
-if test "x$ac_cv_func_memmove" = xyes; then :
-  $as_echo "#define HAVE_MEMMOVE 1" >>confdefs.h
+if test "x$ac_cv_func_memmove" = xyes
+then :
+  printf "%s\n" "#define HAVE_MEMMOVE 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" memmove.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS memmove.$ac_objext"
@@ -20868,12 +23196,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "gmtime_r" "ac_cv_func_gmtime_r"
-if test "x$ac_cv_func_gmtime_r" = xyes; then :
-  $as_echo "#define HAVE_GMTIME_R 1" >>confdefs.h
+if test "x$ac_cv_func_gmtime_r" = xyes
+then :
+  printf "%s\n" "#define HAVE_GMTIME_R 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" gmtime_r.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS gmtime_r.$ac_objext"
@@ -20882,12 +23210,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "isblank" "ac_cv_func_isblank"
-if test "x$ac_cv_func_isblank" = xyes; then :
-  $as_echo "#define HAVE_ISBLANK 1" >>confdefs.h
+if test "x$ac_cv_func_isblank" = xyes
+then :
+  printf "%s\n" "#define HAVE_ISBLANK 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" isblank.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS isblank.$ac_objext"
@@ -20896,12 +23224,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "explicit_bzero" "ac_cv_func_explicit_bzero"
-if test "x$ac_cv_func_explicit_bzero" = xyes; then :
-  $as_echo "#define HAVE_EXPLICIT_BZERO 1" >>confdefs.h
+if test "x$ac_cv_func_explicit_bzero" = xyes
+then :
+  printf "%s\n" "#define HAVE_EXPLICIT_BZERO 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" explicit_bzero.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS explicit_bzero.$ac_objext"
@@ -20910,11 +23238,10 @@ esac
 
 fi
 
-
 LIBOBJ_WITHOUT_CTIMEARC4="$LIBOBJS"
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for reallocarray" >&5
-$as_echo_n "checking for reallocarray... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for reallocarray" >&5
+printf %s "checking for reallocarray... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
@@ -20930,17 +23257,18 @@ int main(void) {
 }
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+if ac_fn_c_try_link "$LINENO"
+then :
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
-$as_echo "#define HAVE_REALLOCARRAY 1" >>confdefs.h
+printf "%s\n" "#define HAVE_REALLOCARRAY 1" >>confdefs.h
 
 
-else
+else $as_nop
 
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	case " $LIBOBJS " in
   *" reallocarray.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS reallocarray.$ac_objext"
@@ -20949,25 +23277,24 @@ esac
 
 
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-ac_fn_c_check_decl "$LINENO" "reallocarray" "ac_cv_have_decl_reallocarray" "$ac_includes_default"
-if test "x$ac_cv_have_decl_reallocarray" = xyes; then :
+ac_fn_check_decl "$LINENO" "reallocarray" "ac_cv_have_decl_reallocarray" "$ac_includes_default" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_reallocarray" = xyes
+then :
   ac_have_decl=1
-else
+else $as_nop
   ac_have_decl=0
 fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_REALLOCARRAY $ac_have_decl
-_ACEOF
+printf "%s\n" "#define HAVE_DECL_REALLOCARRAY $ac_have_decl" >>confdefs.h
 
 if test "$USE_NSS" = "no"; then
 	ac_fn_c_check_func "$LINENO" "arc4random" "ac_cv_func_arc4random"
-if test "x$ac_cv_func_arc4random" = xyes; then :
-  $as_echo "#define HAVE_ARC4RANDOM 1" >>confdefs.h
+if test "x$ac_cv_func_arc4random" = xyes
+then :
+  printf "%s\n" "#define HAVE_ARC4RANDOM 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" arc4random.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS arc4random.$ac_objext"
@@ -20976,12 +23303,12 @@ esac
 
 fi
 
-
 	ac_fn_c_check_func "$LINENO" "arc4random_uniform" "ac_cv_func_arc4random_uniform"
-if test "x$ac_cv_func_arc4random_uniform" = xyes; then :
-  $as_echo "#define HAVE_ARC4RANDOM_UNIFORM 1" >>confdefs.h
+if test "x$ac_cv_func_arc4random_uniform" = xyes
+then :
+  printf "%s\n" "#define HAVE_ARC4RANDOM_UNIFORM 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" arc4random_uniform.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS arc4random_uniform.$ac_objext"
@@ -20990,7 +23317,6 @@ esac
 
 fi
 
-
 	if test "$ac_cv_func_arc4random" = "no"; then
 		case " $LIBOBJS " in
   *" arc4_lock.$ac_objext "* ) ;;
@@ -20998,15 +23324,15 @@ fi
  ;;
 esac
 
-		for ac_func in getentropy
+
+  for ac_func in getentropy
 do :
   ac_fn_c_check_func "$LINENO" "getentropy" "ac_cv_func_getentropy"
-if test "x$ac_cv_func_getentropy" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_GETENTROPY 1
-_ACEOF
+if test "x$ac_cv_func_getentropy" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETENTROPY 1" >>confdefs.h
 
-else
+else $as_nop
 
 		    if test "$USE_WINSOCK" = 1; then
 			case " $LIBOBJS " in
@@ -21032,26 +23358,25 @@ esac
  ;;
 esac
 
-				for ac_header in sys/sha2.h
+				       for ac_header in sys/sha2.h
 do :
   ac_fn_c_check_header_compile "$LINENO" "sys/sha2.h" "ac_cv_header_sys_sha2_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_sys_sha2_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SYS_SHA2_H 1
-_ACEOF
+if test "x$ac_cv_header_sys_sha2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SHA2_H 1" >>confdefs.h
+
+else $as_nop
 
-else
 
-					for ac_func in SHA512_Update
+  for ac_func in SHA512_Update
 do :
   ac_fn_c_check_func "$LINENO" "SHA512_Update" "ac_cv_func_SHA512_Update"
-if test "x$ac_cv_func_SHA512_Update" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SHA512_UPDATE 1
-_ACEOF
+if test "x$ac_cv_func_SHA512_Update" = xyes
+then :
+  printf "%s\n" "#define HAVE_SHA512_UPDATE 1" >>confdefs.h
 
-else
+else $as_nop
 
 						case " $LIBOBJS " in
   *" sha512.$ac_objext "* ) ;;
@@ -21061,22 +23386,22 @@ esac
 
 
 fi
-done
 
+done
 
 fi
 
 done
-
 				if test "$ac_cv_header_sys_sha2_h" = "yes"; then
 					# this lib needed for sha2 on solaris
 					LIBS="$LIBS -lmd"
 				fi
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
-$as_echo_n "checking for library containing clock_gettime... " >&6; }
-if ${ac_cv_search_clock_gettime+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+printf %s "checking for library containing clock_gettime... " >&6; }
+if test ${ac_cv_search_clock_gettime+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21084,46 +23409,48 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char clock_gettime ();
 int
-main ()
+main (void)
 {
 return clock_gettime ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' rt; do
+for ac_lib in '' rt
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_clock_gettime=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_clock_gettime+:} false; then :
+  if test ${ac_cv_search_clock_gettime+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_clock_gettime+:} false; then :
+if test ${ac_cv_search_clock_gettime+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_clock_gettime=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
-$as_echo "$ac_cv_search_clock_gettime" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
+printf "%s\n" "$ac_cv_search_clock_gettime" >&6; }
 ac_res=$ac_cv_search_clock_gettime
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -21144,18 +23471,18 @@ esac
  ;;
 esac
 
-				for ac_func in SHA512_Update
+
+  for ac_func in SHA512_Update
 do :
   ac_fn_c_check_func "$LINENO" "SHA512_Update" "ac_cv_func_SHA512_Update"
-if test "x$ac_cv_func_SHA512_Update" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SHA512_UPDATE 1
-_ACEOF
+if test "x$ac_cv_func_SHA512_Update" = xyes
+then :
+  printf "%s\n" "#define HAVE_SHA512_UPDATE 1" >>confdefs.h
 
-else
+else $as_nop
 
 
-$as_echo "#define COMPAT_SHA512 1" >>confdefs.h
+printf "%s\n" "#define COMPAT_SHA512 1" >>confdefs.h
 
 					case " $LIBOBJS " in
   *" sha512.$ac_objext "* ) ;;
@@ -21165,37 +23492,29 @@ esac
 
 
 fi
-done
 
-				for ac_header in sys/sysctl.h
-do :
-  ac_fn_c_check_header_compile "$LINENO" "sys/sysctl.h" "ac_cv_header_sys_sysctl_h" "$ac_includes_default
+done
+				ac_fn_c_check_header_compile "$LINENO" "sys/sysctl.h" "ac_cv_header_sys_sysctl_h" "$ac_includes_default
 "
-if test "x$ac_cv_header_sys_sysctl_h" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SYS_SYSCTL_H 1
-_ACEOF
+if test "x$ac_cv_header_sys_sysctl_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_SYSCTL_H 1" >>confdefs.h
 
 fi
 
-done
-
-				for ac_func in getauxval
-do :
-  ac_fn_c_check_func "$LINENO" "getauxval" "ac_cv_func_getauxval"
-if test "x$ac_cv_func_getauxval" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_GETAUXVAL 1
-_ACEOF
+				ac_fn_c_check_func "$LINENO" "getauxval" "ac_cv_func_getauxval"
+if test "x$ac_cv_func_getauxval" = xyes
+then :
+  printf "%s\n" "#define HAVE_GETAUXVAL 1" >>confdefs.h
 
 fi
-done
 
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
-$as_echo_n "checking for library containing clock_gettime... " >&6; }
-if ${ac_cv_search_clock_gettime+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+printf %s "checking for library containing clock_gettime... " >&6; }
+if test ${ac_cv_search_clock_gettime+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21203,46 +23522,48 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char clock_gettime ();
 int
-main ()
+main (void)
 {
 return clock_gettime ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' rt; do
+for ac_lib in '' rt
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_clock_gettime=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_clock_gettime+:} false; then :
+  if test ${ac_cv_search_clock_gettime+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_clock_gettime+:} false; then :
+if test ${ac_cv_search_clock_gettime+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_clock_gettime=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
-$as_echo "$ac_cv_search_clock_gettime" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
+printf "%s\n" "$ac_cv_search_clock_gettime" >&6; }
 ac_res=$ac_cv_search_clock_gettime
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 fi
@@ -21252,17 +23573,18 @@ fi
 		    fi
 
 fi
-done
 
+done
 	fi
 fi
 LIBOBJ_WITHOUT_CTIME="$LIBOBJS"
 
 ac_fn_c_check_func "$LINENO" "ctime_r" "ac_cv_func_ctime_r"
-if test "x$ac_cv_func_ctime_r" = xyes; then :
-  $as_echo "#define HAVE_CTIME_R 1" >>confdefs.h
+if test "x$ac_cv_func_ctime_r" = xyes
+then :
+  printf "%s\n" "#define HAVE_CTIME_R 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" ctime_r.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS ctime_r.$ac_objext"
@@ -21271,12 +23593,12 @@ esac
 
 fi
 
-
 ac_fn_c_check_func "$LINENO" "strsep" "ac_cv_func_strsep"
-if test "x$ac_cv_func_strsep" = xyes; then :
-  $as_echo "#define HAVE_STRSEP 1" >>confdefs.h
+if test "x$ac_cv_func_strsep" = xyes
+then :
+  printf "%s\n" "#define HAVE_STRSEP 1" >>confdefs.h
 
-else
+else $as_nop
   case " $LIBOBJS " in
   *" strsep.$ac_objext "* ) ;;
   *) LIBOBJS="$LIBOBJS strsep.$ac_objext"
@@ -21286,9 +23608,9 @@ esac
 fi
 
 
-
 # Check whether --enable-allsymbols was given.
-if test "${enable_allsymbols+set}" = set; then :
+if test ${enable_allsymbols+y}
+then :
   enableval=$enable_allsymbols;
 fi
 
@@ -21298,7 +23620,7 @@ case "$enable_allsymbols" in
 	UBSYMS=""
 	EXTRALINK="libunbound.la"
 
-$as_echo "#define EXPORT_ALL_SYMBOLS 1" >>confdefs.h
+printf "%s\n" "#define EXPORT_ALL_SYMBOLS 1" >>confdefs.h
 
 	;;
 	no|*)
@@ -21328,18 +23650,20 @@ fi
 # check for dnstap if requested
 
     # Check whether --enable-dnstap was given.
-if test "${enable_dnstap+set}" = set; then :
+if test ${enable_dnstap+y}
+then :
   enableval=$enable_dnstap; opt_dnstap=$enableval
-else
+else $as_nop
   opt_dnstap=no
 fi
 
 
 
 # Check whether --with-dnstap-socket-path was given.
-if test "${with_dnstap_socket_path+set}" = set; then :
+if test ${with_dnstap_socket_path+y}
+then :
   withval=$with_dnstap_socket_path; opt_dnstap_socket_path=$withval
-else
+else $as_nop
   opt_dnstap_socket_path="$UNBOUND_RUN_DIR/dnstap.sock"
 fi
 
@@ -21347,11 +23671,12 @@ fi
     if test "x$opt_dnstap" != "xno"; then
         # Extract the first word of "protoc-c", so it can be a program name with args.
 set dummy protoc-c; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_PROTOC_C+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+printf %s "checking for $ac_word... " >&6; }
+if test ${ac_cv_path_PROTOC_C+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   case $PROTOC_C in
   [\\/]* | ?:[\\/]*)
   ac_cv_path_PROTOC_C="$PROTOC_C" # Let the user override the test with a path.
@@ -21361,11 +23686,15 @@ else
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_PROTOC_C="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+  if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
+    ac_cv_path_PROTOC_C="$as_dir$ac_word$ac_exec_ext"
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
@@ -21377,11 +23706,11 @@ esac
 fi
 PROTOC_C=$ac_cv_path_PROTOC_C
 if test -n "$PROTOC_C"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PROTOC_C" >&5
-$as_echo "$PROTOC_C" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $PROTOC_C" >&5
+printf "%s\n" "$PROTOC_C" >&6; }
 else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 fi
 
 
@@ -21390,7 +23719,8 @@ fi
         fi
 
 # Check whether --with-protobuf-c was given.
-if test "${with_protobuf_c+set}" = set; then :
+if test ${with_protobuf_c+y}
+then :
   withval=$with_protobuf_c;
                 # workaround for protobuf-c includes at old dir before protobuf-c-1.0.0
                 if test -f $withval/include/google/protobuf-c/protobuf-c.h; then
@@ -21400,22 +23730,22 @@ if test "${with_protobuf_c+set}" = set; then :
                 fi
                 LDFLAGS="$LDFLAGS -L$withval/lib"
 
-else
+else $as_nop
 
 
 
 pkg_failed=no
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PROTOBUFC" >&5
-$as_echo_n "checking for PROTOBUFC... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for PROTOBUFC" >&5
+printf %s "checking for PROTOBUFC... " >&6; }
 
 if test -n "$PROTOBUFC_CFLAGS"; then
     pkg_cv_PROTOBUFC_CFLAGS="$PROTOBUFC_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libprotobuf-c\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libprotobuf-c\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libprotobuf-c") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_PROTOBUFC_CFLAGS=`$PKG_CONFIG --cflags "libprotobuf-c" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -21429,10 +23759,10 @@ if test -n "$PROTOBUFC_LIBS"; then
     pkg_cv_PROTOBUFC_LIBS="$PROTOBUFC_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libprotobuf-c\""; } >&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libprotobuf-c\""; } >&5
   ($PKG_CONFIG --exists --print-errors "libprotobuf-c") 2>&5
   ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
   pkg_cv_PROTOBUFC_LIBS=`$PKG_CONFIG --libs "libprotobuf-c" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
@@ -21446,8 +23776,8 @@ fi
 
 
 if test $pkg_failed = yes; then
-   	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+   	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
         _pkg_short_errors_supported=yes
@@ -21478,8 +23808,8 @@ fi
 
 
 elif test $pkg_failed = untried; then
-     	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+     	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 
                                 # pkg-config failed; try falling back to known values
                                 # workaround for protobuf-c includes at old dir before protobuf-c-1.0.0
@@ -21498,8 +23828,8 @@ $as_echo "no" >&6; }
 else
 	PROTOBUFC_CFLAGS=$pkg_cv_PROTOBUFC_CFLAGS
 	PROTOBUFC_LIBS=$pkg_cv_PROTOBUFC_LIBS
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 
                                 CFLAGS="$CFLAGS $PROTOBUFC_CFLAGS"
                                 LIBS="$LIBS $PROTOBUFC_LIBS"
@@ -21510,11 +23840,12 @@ fi
 
 fi
 
-        { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing protobuf_c_message_pack" >&5
-$as_echo_n "checking for library containing protobuf_c_message_pack... " >&6; }
-if ${ac_cv_search_protobuf_c_message_pack+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing protobuf_c_message_pack" >&5
+printf %s "checking for library containing protobuf_c_message_pack... " >&6; }
+if test ${ac_cv_search_protobuf_c_message_pack+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21522,55 +23853,57 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char protobuf_c_message_pack ();
 int
-main ()
+main (void)
 {
 return protobuf_c_message_pack ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' protobuf-c; do
+for ac_lib in '' protobuf-c
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_protobuf_c_message_pack=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_protobuf_c_message_pack+:} false; then :
+  if test ${ac_cv_search_protobuf_c_message_pack+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_protobuf_c_message_pack+:} false; then :
+if test ${ac_cv_search_protobuf_c_message_pack+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_protobuf_c_message_pack=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_protobuf_c_message_pack" >&5
-$as_echo "$ac_cv_search_protobuf_c_message_pack" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_protobuf_c_message_pack" >&5
+printf "%s\n" "$ac_cv_search_protobuf_c_message_pack" >&6; }
 ac_res=$ac_cv_search_protobuf_c_message_pack
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
-else
+else $as_nop
   as_fn_error $? "The protobuf-c library was not found. Please install the development libraries for protobuf-c!" "$LINENO" 5
 fi
 
 
 
-$as_echo "#define USE_DNSTAP 1" >>confdefs.h
+printf "%s\n" "#define USE_DNSTAP 1" >>confdefs.h
 
         ENABLE_DNSTAP=1
 
@@ -21579,9 +23912,7 @@ $as_echo "#define USE_DNSTAP 1" >>confdefs.h
         hdr_dnstap_socket_path="`echo $opt_dnstap_socket_path | sed -e 's/\\\\/\\\\\\\\/g'`"
 
 
-cat >>confdefs.h <<_ACEOF
-#define DNSTAP_SOCKET_PATH "$hdr_dnstap_socket_path"
-_ACEOF
+printf "%s\n" "#define DNSTAP_SOCKET_PATH \"$hdr_dnstap_socket_path\"" >>confdefs.h
 
 	DNSTAP_SOCKET_PATH="$hdr_dnstap_socket_path"
 
@@ -21604,9 +23935,10 @@ _ACEOF
 # check for dnscrypt if requested
 
   # Check whether --enable-dnscrypt was given.
-if test "${enable_dnscrypt+set}" = set; then :
+if test ${enable_dnscrypt+y}
+then :
   enableval=$enable_dnscrypt; opt_dnscrypt=$enableval
-else
+else $as_nop
   opt_dnscrypt=no
 fi
 
@@ -21614,18 +23946,20 @@ fi
   if test "x$opt_dnscrypt" != "xno"; then
 
 # Check whether --with-libsodium was given.
-if test "${with_libsodium+set}" = set; then :
+if test ${with_libsodium+y}
+then :
   withval=$with_libsodium;
 	CFLAGS="$CFLAGS -I$withval/include"
 	LDFLAGS="$LDFLAGS -L$withval/lib"
 
 fi
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sodium_init" >&5
-$as_echo_n "checking for library containing sodium_init... " >&6; }
-if ${ac_cv_search_sodium_init+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing sodium_init" >&5
+printf %s "checking for library containing sodium_init... " >&6; }
+if test ${ac_cv_search_sodium_init+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21633,57 +23967,60 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char sodium_init ();
 int
-main ()
+main (void)
 {
 return sodium_init ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' sodium; do
+for ac_lib in '' sodium
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_sodium_init=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_sodium_init+:} false; then :
+  if test ${ac_cv_search_sodium_init+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_sodium_init+:} false; then :
+if test ${ac_cv_search_sodium_init+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_sodium_init=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sodium_init" >&5
-$as_echo "$ac_cv_search_sodium_init" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sodium_init" >&5
+printf "%s\n" "$ac_cv_search_sodium_init" >&6; }
 ac_res=$ac_cv_search_sodium_init
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
-else
+else $as_nop
   as_fn_error $? "The sodium library was not found. Please install sodium!" "$LINENO" 5
 fi
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing crypto_box_curve25519xchacha20poly1305_beforenm" >&5
-$as_echo_n "checking for library containing crypto_box_curve25519xchacha20poly1305_beforenm... " >&6; }
-if ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing crypto_box_curve25519xchacha20poly1305_beforenm" >&5
+printf %s "checking for library containing crypto_box_curve25519xchacha20poly1305_beforenm... " >&6; }
+if test ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21691,66 +24028,69 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char crypto_box_curve25519xchacha20poly1305_beforenm ();
 int
-main ()
+main (void)
 {
 return crypto_box_curve25519xchacha20poly1305_beforenm ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' sodium; do
+for ac_lib in '' sodium
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+:} false; then :
+  if test ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+:} false; then :
+if test ${ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm" >&5
-$as_echo "$ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm" >&5
+printf "%s\n" "$ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm" >&6; }
 ac_res=$ac_cv_search_crypto_box_curve25519xchacha20poly1305_beforenm
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
             ENABLE_DNSCRYPT_XCHACHA20=1
 
 
-$as_echo "#define USE_DNSCRYPT_XCHACHA20 1" >>confdefs.h
+printf "%s\n" "#define USE_DNSCRYPT_XCHACHA20 1" >>confdefs.h
 
 
-else
+else $as_nop
 
             ENABLE_DNSCRYPT_XCHACHA20=0
 
 
 fi
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing sodium_set_misuse_handler" >&5
-$as_echo_n "checking for library containing sodium_set_misuse_handler... " >&6; }
-if ${ac_cv_search_sodium_set_misuse_handler+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for library containing sodium_set_misuse_handler" >&5
+printf %s "checking for library containing sodium_set_misuse_handler... " >&6; }
+if test ${ac_cv_search_sodium_set_misuse_handler+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
   ac_func_search_save_LIBS=$LIBS
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -21758,57 +24098,59 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
    builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
 char sodium_set_misuse_handler ();
 int
-main ()
+main (void)
 {
 return sodium_set_misuse_handler ();
   ;
   return 0;
 }
 _ACEOF
-for ac_lib in '' sodium; do
+for ac_lib in '' sodium
+do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
     ac_res=-l$ac_lib
     LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
   fi
-  if ac_fn_c_try_link "$LINENO"; then :
+  if ac_fn_c_try_link "$LINENO"
+then :
   ac_cv_search_sodium_set_misuse_handler=$ac_res
 fi
-rm -f core conftest.err conftest.$ac_objext \
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext
-  if ${ac_cv_search_sodium_set_misuse_handler+:} false; then :
+  if test ${ac_cv_search_sodium_set_misuse_handler+y}
+then :
   break
 fi
 done
-if ${ac_cv_search_sodium_set_misuse_handler+:} false; then :
+if test ${ac_cv_search_sodium_set_misuse_handler+y}
+then :
 
-else
+else $as_nop
   ac_cv_search_sodium_set_misuse_handler=no
 fi
 rm conftest.$ac_ext
 LIBS=$ac_func_search_save_LIBS
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sodium_set_misuse_handler" >&5
-$as_echo "$ac_cv_search_sodium_set_misuse_handler" >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_sodium_set_misuse_handler" >&5
+printf "%s\n" "$ac_cv_search_sodium_set_misuse_handler" >&6; }
 ac_res=$ac_cv_search_sodium_set_misuse_handler
-if test "$ac_res" != no; then :
+if test "$ac_res" != no
+then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
 
 
-$as_echo "#define SODIUM_MISUSE_HANDLER 1" >>confdefs.h
+printf "%s\n" "#define SODIUM_MISUSE_HANDLER 1" >>confdefs.h
 
 
 fi
 
 
 
-$as_echo "#define USE_DNSCRYPT 1" >>confdefs.h
+printf "%s\n" "#define USE_DNSCRYPT 1" >>confdefs.h
 
         ENABLE_DNSCRYPT=1
 
@@ -21831,7 +24173,8 @@ $as_echo "#define USE_DNSCRYPT 1" >>confdefs.h
 
 # check for cachedb if requested
 # Check whether --enable-cachedb was given.
-if test "${enable_cachedb+set}" = set; then :
+if test ${enable_cachedb+y}
+then :
   enableval=$enable_cachedb;
 fi
 
@@ -21840,7 +24183,7 @@ if test "$found_libhiredis" = "yes"; then enable_cachedb="yes"; fi
 case "$enable_cachedb" in
     yes)
 
-$as_echo "#define USE_CACHEDB 1" >>confdefs.h
+printf "%s\n" "#define USE_CACHEDB 1" >>confdefs.h
 
 	CACHEDB_SRC="cachedb/cachedb.c cachedb/redis.c"
 
@@ -21854,14 +24197,15 @@ esac
 
 # check for ipsecmod if requested
 # Check whether --enable-ipsecmod was given.
-if test "${enable_ipsecmod+set}" = set; then :
+if test ${enable_ipsecmod+y}
+then :
   enableval=$enable_ipsecmod;
 fi
 
 case "$enable_ipsecmod" in
 	yes)
 
-$as_echo "#define USE_IPSECMOD 1" >>confdefs.h
+printf "%s\n" "#define USE_IPSECMOD 1" >>confdefs.h
 
 		IPSECMOD_OBJ="ipsecmod.lo ipsecmod-whitelist.lo"
 
@@ -21875,14 +24219,15 @@ esac
 
 # check for ipset if requested
 # Check whether --enable-ipset was given.
-if test "${enable_ipset+set}" = set; then :
+if test ${enable_ipset+y}
+then :
   enableval=$enable_ipset;
 fi
 
 case "$enable_ipset" in
     yes)
 
-$as_echo "#define USE_IPSET 1" >>confdefs.h
+printf "%s\n" "#define USE_IPSET 1" >>confdefs.h
 
 		IPSET_SRC="ipset/ipset.c"
 
@@ -21892,15 +24237,16 @@ $as_echo "#define USE_IPSET 1" >>confdefs.h
 		# mnl
 
 # Check whether --with-libmnl was given.
-if test "${with_libmnl+set}" = set; then :
+if test ${with_libmnl+y}
+then :
   withval=$with_libmnl;
-else
+else $as_nop
    withval="yes"
 fi
 
 		found_libmnl="no"
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libmnl" >&5
-$as_echo_n "checking for libmnl... " >&6; }
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libmnl" >&5
+printf %s "checking for libmnl... " >&6; }
 		if test x_$withval = x_ -o x_$withval = x_yes; then
 			withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
 		fi
@@ -21917,8 +24263,8 @@ $as_echo_n "checking for libmnl... " >&6; }
 				if test "$dir" != "/usr"; then
 					LDFLAGS="$LDFLAGS -L$dir/lib"
 				fi
-				{ $as_echo "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
-$as_echo "found in $dir" >&6; }
+				{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
+printf "%s\n" "found in $dir" >&6; }
 				LIBS="$LIBS -lmnl"
 				break;
 			fi
@@ -21932,14 +24278,15 @@ $as_echo "found in $dir" >&6; }
 		;;
 esac
 # Check whether --enable-explicit-port-randomisation was given.
-if test "${enable_explicit_port_randomisation+set}" = set; then :
+if test ${enable_explicit_port_randomisation+y}
+then :
   enableval=$enable_explicit_port_randomisation;
 fi
 
 case "$enable_explicit_port_randomisation" in
 	no)
 
-$as_echo "#define DISABLE_EXPLICIT_PORT_RANDOMISATION 1" >>confdefs.h
+printf "%s\n" "#define DISABLE_EXPLICIT_PORT_RANDOMISATION 1" >>confdefs.h
 
 		;;
 	yes|*)
@@ -21948,14 +24295,15 @@ esac
 
 if echo "$host" | $GREP -i -e linux >/dev/null; then
 	# Check whether --enable-linux-ip-local-port-range was given.
-if test "${enable_linux_ip_local_port_range+set}" = set; then :
+if test ${enable_linux_ip_local_port_range+y}
+then :
   enableval=$enable_linux_ip_local_port_range;
 fi
 
 	case "$enable_linux_ip_local_port_range" in
 		yes)
 
-$as_echo "#define USE_LINUX_IP_LOCAL_PORT_RANGE 1" >>confdefs.h
+printf "%s\n" "#define USE_LINUX_IP_LOCAL_PORT_RANGE 1" >>confdefs.h
 
 			;;
 		no|*)
@@ -21964,8 +24312,8 @@ $as_echo "#define USE_LINUX_IP_LOCAL_PORT_RANGE 1" >>confdefs.h
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${MAKE:-make} supports $< with implicit rule in scope" >&5
-$as_echo_n "checking if ${MAKE:-make} supports $< with implicit rule in scope... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if ${MAKE:-make} supports $< with implicit rule in scope" >&5
+printf %s "checking if ${MAKE:-make} supports $< with implicit rule in scope... " >&6; }
 # on openBSD, the implicit rule make $< work.
 # on Solaris, it does not work ($? is changed sources, $^ lists dependencies).
 # gmake works.
@@ -21988,13 +24336,13 @@ ${MAKE:-make} -f conftest.make >/dev/null
 rm -f conftest.make conftest.c conftest.dir/conftest.c
 rm -rf conftest.dir
 if test ! -f conftest.lo; then
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
 	SOURCEDETERMINE='echo "$^" | awk "-F " "{print \$$1;}" > .source'
 	SOURCEFILE='`cat .source`'
 else
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
 	SOURCEDETERMINE=':'
 	SOURCEFILE='$<'
 fi
@@ -22007,7 +24355,8 @@ ALLTARGET="alltargets"
 INSTALLTARGET="install-all"
 
 # Check whether --with-libunbound-only was given.
-if test "${with_libunbound_only+set}" = set; then :
+if test ${with_libunbound_only+y}
+then :
   withval=$with_libunbound_only;
 	if test "$withval" = "yes"; then
 		ALLTARGET="lib"
@@ -22029,13 +24378,13 @@ fi
 
 
 
-  { $as_echo "$as_me:${as_lineno-$LINENO}: Stripping extension flags..." >&5
-$as_echo "$as_me: Stripping extension flags..." >&6;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: Stripping extension flags..." >&5
+printf "%s\n" "$as_me: Stripping extension flags..." >&6;}
 
   if echo $CFLAGS | grep " -D_GNU_SOURCE" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_GNU_SOURCE//g'`"
 
-$as_echo "#define OMITTED__D_GNU_SOURCE 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_GNU_SOURCE 1" >>confdefs.h
 
   fi
 
@@ -22043,7 +24392,7 @@ $as_echo "#define OMITTED__D_GNU_SOURCE 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_BSD_SOURCE" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_BSD_SOURCE//g'`"
 
-$as_echo "#define OMITTED__D_BSD_SOURCE 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_BSD_SOURCE 1" >>confdefs.h
 
   fi
 
@@ -22051,7 +24400,7 @@ $as_echo "#define OMITTED__D_BSD_SOURCE 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_DEFAULT_SOURCE" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_DEFAULT_SOURCE//g'`"
 
-$as_echo "#define OMITTED__D_DEFAULT_SOURCE 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_DEFAULT_SOURCE 1" >>confdefs.h
 
   fi
 
@@ -22059,7 +24408,7 @@ $as_echo "#define OMITTED__D_DEFAULT_SOURCE 1" >>confdefs.h
   if echo $CFLAGS | grep " -D__EXTENSIONS__" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D__EXTENSIONS__//g'`"
 
-$as_echo "#define OMITTED__D__EXTENSIONS__ 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D__EXTENSIONS__ 1" >>confdefs.h
 
   fi
 
@@ -22067,7 +24416,7 @@ $as_echo "#define OMITTED__D__EXTENSIONS__ 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_POSIX_C_SOURCE=200112" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_POSIX_C_SOURCE=200112//g'`"
 
-$as_echo "#define OMITTED__D_POSIX_C_SOURCE_200112 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_POSIX_C_SOURCE_200112 1" >>confdefs.h
 
   fi
 
@@ -22075,7 +24424,7 @@ $as_echo "#define OMITTED__D_POSIX_C_SOURCE_200112 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_XOPEN_SOURCE=600" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_XOPEN_SOURCE=600//g'`"
 
-$as_echo "#define OMITTED__D_XOPEN_SOURCE_600 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_XOPEN_SOURCE_600 1" >>confdefs.h
 
   fi
 
@@ -22083,7 +24432,7 @@ $as_echo "#define OMITTED__D_XOPEN_SOURCE_600 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_XOPEN_SOURCE_EXTENDED=1" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_XOPEN_SOURCE_EXTENDED=1//g'`"
 
-$as_echo "#define OMITTED__D_XOPEN_SOURCE_EXTENDED_1 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_XOPEN_SOURCE_EXTENDED_1 1" >>confdefs.h
 
   fi
 
@@ -22091,7 +24440,7 @@ $as_echo "#define OMITTED__D_XOPEN_SOURCE_EXTENDED_1 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_ALL_SOURCE" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_ALL_SOURCE//g'`"
 
-$as_echo "#define OMITTED__D_ALL_SOURCE 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_ALL_SOURCE 1" >>confdefs.h
 
   fi
 
@@ -22099,7 +24448,7 @@ $as_echo "#define OMITTED__D_ALL_SOURCE 1" >>confdefs.h
   if echo $CFLAGS | grep " -D_LARGEFILE_SOURCE=1" >/dev/null 2>&1; then
     CFLAGS="`echo $CFLAGS | sed -e 's/ -D_LARGEFILE_SOURCE=1//g'`"
 
-$as_echo "#define OMITTED__D_LARGEFILE_SOURCE_1 1" >>confdefs.h
+printf "%s\n" "#define OMITTED__D_LARGEFILE_SOURCE_1 1" >>confdefs.h
 
   fi
 
@@ -22112,14 +24461,12 @@ LDFLAGS=`echo "$LDFLAGS"|sed -e 's/^ *//'`
 LIBS=`echo "$LIBS"|sed -e 's/^ *//'`
 
 
-cat >>confdefs.h <<_ACEOF
-#define MAXSYSLOGMSGLEN 10240
-_ACEOF
+printf "%s\n" "#define MAXSYSLOGMSGLEN 10240" >>confdefs.h
 
 
 
 
-version=1.19.3
+version=1.20.0
 
 date=`date +'%b %e, %Y'`
 
@@ -22155,8 +24502,8 @@ _ACEOF
     case $ac_val in #(
     *${as_nl}*)
       case $ac_var in #(
-      *_cv_*) { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
-$as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
+      *_cv_*) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: cache variable $ac_var contains a newline" >&5
+printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
       esac
       case $ac_var in #(
       _ | IFS | as_nl) ;; #(
@@ -22186,15 +24533,15 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
      /^ac_cv_env_/b end
      t clear
      :clear
-     s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+     s/^\([^=]*\)=\(.*[{}].*\)$/test ${\1+y} || &/
      t end
      s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
      :end' >>confcache
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
     if test "x$cache_file" != "x/dev/null"; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
-$as_echo "$as_me: updating cache $cache_file" >&6;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
+printf "%s\n" "$as_me: updating cache $cache_file" >&6;}
       if test ! -f "$cache_file" || test -h "$cache_file"; then
 	cat confcache >"$cache_file"
       else
@@ -22208,8 +24555,8 @@ $as_echo "$as_me: updating cache $cache_file" >&6;}
       fi
     fi
   else
-    { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
-$as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
+printf "%s\n" "$as_me: not updating unwritable cache $cache_file" >&6;}
   fi
 fi
 rm -f confcache
@@ -22226,7 +24573,7 @@ U=
 for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
   # 1. Remove the extension, and $U if already installed.
   ac_script='s/\$U\././;s/\.o$//;s/\.obj$//'
-  ac_i=`$as_echo "$ac_i" | sed "$ac_script"`
+  ac_i=`printf "%s\n" "$ac_i" | sed "$ac_script"`
   # 2. Prepend LIBOBJDIR.  When used with automake>=1.10 LIBOBJDIR
   #    will be set to the directory where LIBOBJS objects are built.
   as_fn_append ac_libobjs " \${LIBOBJDIR}$ac_i\$U.$ac_objext"
@@ -22246,8 +24593,8 @@ fi
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
-$as_echo "$as_me: creating $CONFIG_STATUS" >&6;}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $CONFIG_STATUS" >&5
+printf "%s\n" "$as_me: creating $CONFIG_STATUS" >&6;}
 as_write_fail=0
 cat >$CONFIG_STATUS <<_ASEOF || as_write_fail=1
 #! $SHELL
@@ -22270,14 +24617,16 @@ cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then :
+as_nop=:
+if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+then :
   emulate sh
   NULLCMD=:
   # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else
+else $as_nop
   case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
@@ -22287,46 +24636,46 @@ esac
 fi
 
 
+
+# Reset variables that may have inherited troublesome values from
+# the environment.
+
+# IFS needs to be set, to space, tab, and newline, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would have the
+# side effect of setting IFS to empty, thus disabling word splitting.)
+# Quoting is to prevent editors from complaining about space-tab.
 as_nl='
 '
 export as_nl
-# Printing a long string crashes Solaris 7 /usr/bin/printf.
-as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
-as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo
-as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo
-# Prefer a ksh shell builtin over an external printf program on Solaris,
-# but without wasting forks for bash or zsh.
-if test -z "$BASH_VERSION$ZSH_VERSION" \
-    && (test "X`print -r -- $as_echo`" = "X$as_echo") 2>/dev/null; then
-  as_echo='print -r --'
-  as_echo_n='print -rn --'
-elif (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then
-  as_echo='printf %s\n'
-  as_echo_n='printf %s'
-else
-  if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then
-    as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"'
-    as_echo_n='/usr/ucb/echo -n'
-  else
-    as_echo_body='eval expr "X$1" : "X\\(.*\\)"'
-    as_echo_n_body='eval
-      arg=$1;
-      case $arg in #(
-      *"$as_nl"*)
-	expr "X$arg" : "X\\(.*\\)$as_nl";
-	arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;;
-      esac;
-      expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl"
-    '
-    export as_echo_n_body
-    as_echo_n='sh -c $as_echo_n_body as_echo'
-  fi
-  export as_echo_body
-  as_echo='sh -c $as_echo_body as_echo'
-fi
+IFS=" ""	$as_nl"
+
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# Ensure predictable behavior from utilities with locale-dependent output.
+LC_ALL=C
+export LC_ALL
+LANGUAGE=C
+export LANGUAGE
+
+# We cannot yet rely on "unset" to work, but we need these variables
+# to be unset--not just set to an empty or harmless value--now, to
+# avoid bugs in old shells (e.g. pre-3.0 UWIN ksh).  This construct
+# also avoids known problems related to "unset" and subshell syntax
+# in other old shells (e.g. bash 2.01 and pdksh 5.2.14).
+for as_var in BASH_ENV ENV MAIL MAILPATH CDPATH
+do eval test \${$as_var+y} \
+  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
+done
+
+# Ensure that fds 0, 1, and 2 are open.
+if (exec 3>&0) 2>/dev/null; then :; else exec 0</dev/null; fi
+if (exec 3>&1) 2>/dev/null; then :; else exec 1>/dev/null; fi
+if (exec 3>&2)            ; then :; else exec 2>/dev/null; fi
 
 # The user is always right.
-if test "${PATH_SEPARATOR+set}" != set; then
+if ${PATH_SEPARATOR+false} :; then
   PATH_SEPARATOR=:
   (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
     (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
@@ -22335,13 +24684,6 @@ if test "${PATH_SEPARATOR+set}" != set; then
 fi
 
 
-# IFS
-# We need space, tab and new line, in precisely that order.  Quoting is
-# there to prevent editors from complaining about space-tab.
-# (If _AS_PATH_WALK were called with IFS unset, it would disable word
-# splitting by setting IFS to empty value.)
-IFS=" ""	$as_nl"
-
 # Find who we are.  Look in the path if we contain no directory separator.
 as_myself=
 case $0 in #((
@@ -22350,8 +24692,12 @@ case $0 in #((
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+  case $as_dir in #(((
+    '') as_dir=./ ;;
+    */) ;;
+    *) as_dir=$as_dir/ ;;
+  esac
+    test -r "$as_dir$0" && as_myself=$as_dir$0 && break
   done
 IFS=$as_save_IFS
 
@@ -22363,30 +24709,10 @@ if test "x$as_myself" = x; then
   as_myself=$0
 fi
 if test ! -f "$as_myself"; then
-  $as_echo "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
+  printf "%s\n" "$as_myself: error: cannot find myself; rerun with an absolute file name" >&2
   exit 1
 fi
 
-# Unset variables that we do not need and which cause bugs (e.g. in
-# pre-3.0 UWIN ksh).  But do not cause bugs in bash 2.01; the "|| exit 1"
-# suppresses any "Segmentation fault" message there.  '((' could
-# trigger a bug in pdksh 5.2.14.
-for as_var in BASH_ENV ENV MAIL MAILPATH
-do eval test x\${$as_var+set} = xset \
-  && ( (unset $as_var) || exit 1) >/dev/null 2>&1 && unset $as_var || :
-done
-PS1='$ '
-PS2='> '
-PS4='+ '
-
-# NLS nuisances.
-LC_ALL=C
-export LC_ALL
-LANGUAGE=C
-export LANGUAGE
-
-# CDPATH.
-(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
 
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
@@ -22399,13 +24725,14 @@ as_fn_error ()
   as_status=$1; test $as_status -eq 0 && as_status=1
   if test "$4"; then
     as_lineno=${as_lineno-"$3"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-    $as_echo "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
+    printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: $2" >&$4
   fi
-  $as_echo "$as_me: error: $2" >&2
+  printf "%s\n" "$as_me: error: $2" >&2
   as_fn_exit $as_status
 } # as_fn_error
 
 
+
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -22432,18 +24759,20 @@ as_fn_unset ()
   { eval $1=; unset $1;}
 }
 as_unset=as_fn_unset
+
 # as_fn_append VAR VALUE
 # ----------------------
 # Append the text in VALUE to the end of the definition contained in VAR. Take
 # advantage of any shell optimizations that allow amortized linear growth over
 # repeated appends, instead of the typical quadratic growth present in naive
 # implementations.
-if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null; then :
+if (eval "as_var=1; as_var+=2; test x\$as_var = x12") 2>/dev/null
+then :
   eval 'as_fn_append ()
   {
     eval $1+=\$2
   }'
-else
+else $as_nop
   as_fn_append ()
   {
     eval $1=\$$1\$2
@@ -22455,12 +24784,13 @@ fi # as_fn_append
 # Perform arithmetic evaluation on the ARGs, and store the result in the
 # global $as_val. Take advantage of shells that can avoid forks. The arguments
 # must be portable across $(()) and expr.
-if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null; then :
+if (eval "test \$(( 1 + 1 )) = 2") 2>/dev/null
+then :
   eval 'as_fn_arith ()
   {
     as_val=$(( $* ))
   }'
-else
+else $as_nop
   as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
@@ -22491,7 +24821,7 @@ as_me=`$as_basename -- "$0" ||
 $as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
 	 X"$0" : 'X\(//\)$' \| \
 	 X"$0" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X/"$0" |
+printf "%s\n" X/"$0" |
     sed '/^.*\/\([^/][^/]*\)\/*$/{
 	    s//\1/
 	    q
@@ -22513,6 +24843,10 @@ as_cr_Letters=$as_cr_letters$as_cr_LETTERS
 as_cr_digits='0123456789'
 as_cr_alnum=$as_cr_Letters$as_cr_digits
 
+
+# Determine whether it's possible to make 'echo' print without a newline.
+# These variables are no longer used directly by Autoconf, but are AC_SUBSTed
+# for compatibility with existing Makefiles.
 ECHO_C= ECHO_N= ECHO_T=
 case `echo -n x` in #(((((
 -n*)
@@ -22526,6 +24860,12 @@ case `echo -n x` in #(((((
   ECHO_N='-n';;
 esac
 
+# For backward compatibility with old third-party macros, we provide
+# the shell variables $as_echo and $as_echo_n.  New code should use
+# AS_ECHO(["message"]) and AS_ECHO_N(["message"]), respectively.
+as_echo='printf %s\n'
+as_echo_n='printf %s'
+
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -22567,7 +24907,7 @@ as_fn_mkdir_p ()
     as_dirs=
     while :; do
       case $as_dir in #(
-      *\'*) as_qdir=`$as_echo "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
+      *\'*) as_qdir=`printf "%s\n" "$as_dir" | sed "s/'/'\\\\\\\\''/g"`;; #'(
       *) as_qdir=$as_dir;;
       esac
       as_dirs="'$as_qdir' $as_dirs"
@@ -22576,7 +24916,7 @@ $as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$as_dir" : 'X\(//\)[^/]' \| \
 	 X"$as_dir" : 'X\(//\)$' \| \
 	 X"$as_dir" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$as_dir" |
+printf "%s\n" X"$as_dir" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -22638,8 +24978,8 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by unbound $as_me 1.19.3, which was
-generated by GNU Autoconf 2.69.  Invocation command line was
+This file was extended by unbound $as_me 1.20.0, which was
+generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -22701,14 +25041,16 @@ $config_commands
 Report bugs to <unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues>."
 
 _ACEOF
+ac_cs_config=`printf "%s\n" "$ac_configure_args" | sed "$ac_safe_unquote"`
+ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\''/g"`
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
-ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
+ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-unbound config.status 1.19.3
-configured by $0, generated by GNU Autoconf 2.69,
+unbound config.status 1.20.0
+configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2012 Free Software Foundation, Inc.
+Copyright (C) 2021 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -22746,15 +25088,15 @@ do
   -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
     ac_cs_recheck=: ;;
   --version | --versio | --versi | --vers | --ver | --ve | --v | -V )
-    $as_echo "$ac_cs_version"; exit ;;
+    printf "%s\n" "$ac_cs_version"; exit ;;
   --config | --confi | --conf | --con | --co | --c )
-    $as_echo "$ac_cs_config"; exit ;;
+    printf "%s\n" "$ac_cs_config"; exit ;;
   --debug | --debu | --deb | --de | --d | -d )
     debug=: ;;
   --file | --fil | --fi | --f )
     $ac_shift
     case $ac_optarg in
-    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     '') as_fn_error $? "missing file argument" ;;
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
@@ -22762,7 +25104,7 @@ do
   --header | --heade | --head | --hea )
     $ac_shift
     case $ac_optarg in
-    *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *\'*) ac_optarg=`printf "%s\n" "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
     esac
     as_fn_append CONFIG_HEADERS " '$ac_optarg'"
     ac_need_defaults=false;;
@@ -22771,7 +25113,7 @@ do
     as_fn_error $? "ambiguous option: \`$1'
 Try \`$0 --help' for more information.";;
   --help | --hel | -h )
-    $as_echo "$ac_cs_usage"; exit ;;
+    printf "%s\n" "$ac_cs_usage"; exit ;;
   -q | -quiet | --quiet | --quie | --qui | --qu | --q \
   | -silent | --silent | --silen | --sile | --sil | --si | --s)
     ac_cs_silent=: ;;
@@ -22799,7 +25141,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 if \$ac_cs_recheck; then
   set X $SHELL '$0' $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
   shift
-  \$as_echo "running CONFIG_SHELL=$SHELL \$*" >&6
+  \printf "%s\n" "running CONFIG_SHELL=$SHELL \$*" >&6
   CONFIG_SHELL='$SHELL'
   export CONFIG_SHELL
   exec "\$@"
@@ -22813,7 +25155,7 @@ exec 5>>config.log
   sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
 ## Running $as_me. ##
 _ASBOX
-  $as_echo "$ac_log"
+  printf "%s\n" "$ac_log"
 } >&5
 
 _ACEOF
@@ -23139,9 +25481,9 @@ done
 # We use the long form for the default assignment because of an extremely
 # bizarre bug on SunOS 4.1.3.
 if $ac_need_defaults; then
-  test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
-  test "${CONFIG_HEADERS+set}" = set || CONFIG_HEADERS=$config_headers
-  test "${CONFIG_COMMANDS+set}" = set || CONFIG_COMMANDS=$config_commands
+  test ${CONFIG_FILES+y} || CONFIG_FILES=$config_files
+  test ${CONFIG_HEADERS+y} || CONFIG_HEADERS=$config_headers
+  test ${CONFIG_COMMANDS+y} || CONFIG_COMMANDS=$config_commands
 fi
 
 # Have a temporary directory for convenience.  Make it in the build tree
@@ -23477,7 +25819,7 @@ do
 	   esac ||
 	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
       esac
-      case $ac_f in *\'*) ac_f=`$as_echo "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
+      case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
@@ -23485,17 +25827,17 @@ do
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
-	  $as_echo "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
+	  printf "%s\n" "$*" | sed 's|^[^:]*/||;s|:[^:]*/|, |g'
 	`' by configure.'
     if test x"$ac_file" != x-; then
       configure_input="$ac_file.  $configure_input"
-      { $as_echo "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
-$as_echo "$as_me: creating $ac_file" >&6;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: creating $ac_file" >&5
+printf "%s\n" "$as_me: creating $ac_file" >&6;}
     fi
     # Neutralize special characters interpreted by sed in replacement strings.
     case $configure_input in #(
     *\&* | *\|* | *\\* )
-       ac_sed_conf_input=`$as_echo "$configure_input" |
+       ac_sed_conf_input=`printf "%s\n" "$configure_input" |
        sed 's/[\\\\&|]/\\\\&/g'`;; #(
     *) ac_sed_conf_input=$configure_input;;
     esac
@@ -23512,7 +25854,7 @@ $as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
 	 X"$ac_file" : 'X\(//\)[^/]' \| \
 	 X"$ac_file" : 'X\(//\)$' \| \
 	 X"$ac_file" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$ac_file" |
+printf "%s\n" X"$ac_file" |
     sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
 	    s//\1/
 	    q
@@ -23536,9 +25878,9 @@ $as_echo X"$ac_file" |
 case "$ac_dir" in
 .) ac_dir_suffix= ac_top_builddir_sub=. ac_top_build_prefix= ;;
 *)
-  ac_dir_suffix=/`$as_echo "$ac_dir" | sed 's|^\.[\\/]||'`
+  ac_dir_suffix=/`printf "%s\n" "$ac_dir" | sed 's|^\.[\\/]||'`
   # A ".." for each directory in $ac_dir_suffix.
-  ac_top_builddir_sub=`$as_echo "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
+  ac_top_builddir_sub=`printf "%s\n" "$ac_dir_suffix" | sed 's|/[^\\/]*|/..|g;s|/||'`
   case $ac_top_builddir_sub in
   "") ac_top_builddir_sub=. ac_top_build_prefix= ;;
   *)  ac_top_build_prefix=$ac_top_builddir_sub/ ;;
@@ -23591,8 +25933,8 @@ ac_sed_dataroot='
 case `eval "sed -n \"\$ac_sed_dataroot\" $ac_file_inputs"` in
 *datarootdir*) ac_datarootdir_seen=yes;;
 *@datadir@*|*@docdir@*|*@infodir@*|*@localedir@*|*@mandir@*)
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
-$as_echo "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&5
+printf "%s\n" "$as_me: WARNING: $ac_file_inputs seems to ignore the --datarootdir setting" >&2;}
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
   ac_datarootdir_hack='
@@ -23634,9 +25976,9 @@ test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
-$as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"
@@ -23652,27 +25994,27 @@ which seems to be undefined.  Please make sure it is defined" >&2;}
   #
   if test x"$ac_file" != x-; then
     {
-      $as_echo "/* $configure_input  */" \
+      printf "%s\n" "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs"
     } >"$ac_tmp/config.h" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5
     if diff "$ac_file" "$ac_tmp/config.h" >/dev/null 2>&1; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
-$as_echo "$as_me: $ac_file is unchanged" >&6;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: $ac_file is unchanged" >&5
+printf "%s\n" "$as_me: $ac_file is unchanged" >&6;}
     else
       rm -f "$ac_file"
       mv "$ac_tmp/config.h" "$ac_file" \
 	|| as_fn_error $? "could not create $ac_file" "$LINENO" 5
     fi
   else
-    $as_echo "/* $configure_input  */" \
+    printf "%s\n" "/* $configure_input  */" >&1 \
       && eval '$AWK -f "$ac_tmp/defines.awk"' "$ac_file_inputs" \
       || as_fn_error $? "could not create -" "$LINENO" 5
   fi
  ;;
 
-  :C)  { $as_echo "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
-$as_echo "$as_me: executing $ac_file commands" >&6;}
+  :C)  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: executing $ac_file commands" >&5
+printf "%s\n" "$as_me: executing $ac_file commands" >&6;}
  ;;
   esac
 
@@ -24206,6 +26548,7 @@ _LT_EOF
   esac
 
 
+
 ltmain=$ac_aux_dir/ltmain.sh
 
 
@@ -24262,7 +26605,8 @@ if test "$no_create" != yes; then
   $ac_cs_success || as_fn_exit 1
 fi
 if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
-$as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5
+printf "%s\n" "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;}
 fi
 
+
diff --git a/usr.sbin/unbound/configure.ac b/usr.sbin/unbound/configure.ac
index ef109c705b6..52ffbc8d17e 100644
--- a/usr.sbin/unbound/configure.ac
+++ b/usr.sbin/unbound/configure.ac
@@ -4,21 +4,21 @@ AC_PREREQ([2.56])
 sinclude(acx_nlnetlabs.m4)
 sinclude(ax_pthread.m4)
 sinclude(acx_python.m4)
-sinclude(ac_pkg_swig.m4)
+sinclude(ax_pkg_swig.m4)
 sinclude(dnstap/dnstap.m4)
 sinclude(dnscrypt/dnscrypt.m4)
 
 # must be numbers. ac_defun because of later processing
 m4_define([VERSION_MAJOR],[1])
-m4_define([VERSION_MINOR],[19])
-m4_define([VERSION_MICRO],[3])
+m4_define([VERSION_MINOR],[20])
+m4_define([VERSION_MICRO],[0])
 AC_INIT([unbound],m4_defn([VERSION_MAJOR]).m4_defn([VERSION_MINOR]).m4_defn([VERSION_MICRO]),[unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues],[unbound])
 AC_SUBST(UNBOUND_VERSION_MAJOR, [VERSION_MAJOR])
 AC_SUBST(UNBOUND_VERSION_MINOR, [VERSION_MINOR])
 AC_SUBST(UNBOUND_VERSION_MICRO, [VERSION_MICRO])
 
 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=26
+LIBUNBOUND_REVISION=27
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -112,6 +112,7 @@ LIBUNBOUND_AGE=1
 # 1.19.1 had 9:24:1
 # 1.19.2 had 9:25:1
 # 1.19.3 had 9:26:1
+# 1.20.0 had 9:27:1
 
 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -273,6 +274,9 @@ AC_DEFINE(WINVER, 0x0502, [the version of the windows API enabled])
 ACX_RSRC_VERSION(wnvs)
 AC_DEFINE_UNQUOTED(RSRC_PACKAGE_VERSION, [$wnvs], [version number for resource files])
 
+# Check for 'grep -e' program, here, since ACX_CHECK_FLTO needs that.
+AC_PROG_GREP
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_LANG([C])
@@ -795,9 +799,9 @@ if test x_$ub_test_python != x_no; then
       ub_have_swig=no
       AC_ARG_ENABLE(swig-version-check, AS_HELP_STRING([--disable-swig-version-check],[Disable swig version check to build python modules with older swig even though that is unreliable]))
       if test "$enable_swig_version_check" = "yes"; then
-      	AC_PROG_SWIG(2.0.1)
+      	AX_PKG_SWIG(2.0.1)
       else
-      	AC_PROG_SWIG
+      	AX_PKG_SWIG
       fi
       AC_MSG_CHECKING(SWIG)
       if test ! -x "$SWIG"; then
diff --git a/usr.sbin/unbound/daemon/cachedump.c b/usr.sbin/unbound/daemon/cachedump.c
index 61ee1d29133..c4f55d8c9cb 100644
--- a/usr.sbin/unbound/daemon/cachedump.c
+++ b/usr.sbin/unbound/daemon/cachedump.c
@@ -839,6 +839,7 @@ int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 	char b[260];
 	struct query_info qinfo;
 	struct iter_hints_stub* stub;
+	int nolock = 0;
 	regional_free_all(region);
 	qinfo.qname = nm;
 	qinfo.qname_len = nmlen;
@@ -850,13 +851,16 @@ int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 	if(!ssl_printf(ssl, "The following name servers are used for lookup "
 		"of %s\n", b)) 
 		return 0;
-	
-	dp = forwards_lookup(worker->env.fwds, nm, qinfo.qclass);
+
+	dp = forwards_lookup(worker->env.fwds, nm, qinfo.qclass, nolock);
 	if(dp) {
-		if(!ssl_printf(ssl, "forwarding request:\n"))
+		if(!ssl_printf(ssl, "forwarding request:\n")) {
+			lock_rw_unlock(&worker->env.fwds->lock);
 			return 0;
+		}
 		print_dp_main(ssl, dp, NULL);
 		print_dp_details(ssl, worker, dp);
+		lock_rw_unlock(&worker->env.fwds->lock);
 		return 1;
 	}
 	
@@ -892,21 +896,26 @@ int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 					return 0;
 				continue;
 			}
-		} 
+		}
 		stub = hints_lookup_stub(worker->env.hints, nm, qinfo.qclass,
-			dp);
+			dp, nolock);
 		if(stub) {
 			if(stub->noprime) {
 				if(!ssl_printf(ssl, "The noprime stub servers "
-					"are used:\n"))
+					"are used:\n")) {
+					lock_rw_unlock(&worker->env.hints->lock);
 					return 0;
+				}
 			} else {
 				if(!ssl_printf(ssl, "The stub is primed "
-						"with servers:\n"))
+						"with servers:\n")) {
+					lock_rw_unlock(&worker->env.hints->lock);
 					return 0;
+				}
 			}
 			print_dp_main(ssl, stub->dp, NULL);
 			print_dp_details(ssl, worker, stub->dp);
+			lock_rw_unlock(&worker->env.hints->lock);
 		} else {
 			print_dp_main(ssl, dp, msg);
 			print_dp_details(ssl, worker, dp);
diff --git a/usr.sbin/unbound/daemon/daemon.c b/usr.sbin/unbound/daemon/daemon.c
index 193608d40e0..f0ee329db90 100644
--- a/usr.sbin/unbound/daemon/daemon.c
+++ b/usr.sbin/unbound/daemon/daemon.c
@@ -91,6 +91,8 @@
 #include "util/net_help.h"
 #include "sldns/keyraw.h"
 #include "respip/respip.h"
+#include "iterator/iter_fwd.h"
+#include "iterator/iter_hints.h"
 #include <signal.h>
 
 #ifdef HAVE_SYSTEMD
@@ -99,6 +101,9 @@
 #ifdef HAVE_NETDB_H
 #include <netdb.h>
 #endif
+#ifdef USE_CACHEDB
+#include "cachedb/cachedb.h"
+#endif
 
 /** How many quit requests happened. */
 static int sig_record_quit = 0;
@@ -260,6 +265,7 @@ daemon_init(void)
 		free(daemon);
 		return NULL;
 	}
+	daemon->env->modstack = &daemon->mods;
 	/* init edns_known_options */
 	if(!edns_known_options_init(daemon->env)) {
 		free(daemon->env);
@@ -321,17 +327,15 @@ static int setup_acl_for_ports(struct acl_list* list,
 	struct listen_port* port_list)
 {
 	struct acl_addr* acl_node;
-	struct addrinfo* addr;
 	for(; port_list; port_list=port_list->next) {
 		if(!port_list->socket) {
 			/* This is mainly for testbound where port_list is
 			 * empty. */
 			continue;
 		}
-		addr = port_list->socket->addr;
 		if(!(acl_node = acl_interface_insert(list,
-			(struct sockaddr_storage*)addr->ai_addr,
-			(socklen_t)addr->ai_addrlen,
+			(struct sockaddr_storage*)port_list->socket->addr,
+			port_list->socket->addrlen,
 			acl_refuse))) {
 			return 0;
 		}
@@ -716,6 +720,12 @@ daemon_fork(struct daemon* daemon)
 		fatal_exit("Could not create local zones: out of memory");
 	if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 		fatal_exit("Could not set up local zones");
+	if(!(daemon->env->fwds = forwards_create()) ||
+		!forwards_apply_cfg(daemon->env->fwds, daemon->cfg))
+		fatal_exit("Could not set forward zones");
+	if(!(daemon->env->hints = hints_create()) ||
+		!hints_apply_cfg(daemon->env->hints, daemon->cfg))
+		fatal_exit("Could not set root or stub hints");
 
 	/* process raw response-ip configuration data */
 	if(!(daemon->respip_set = respip_set_create()))
@@ -740,6 +750,10 @@ daemon_fork(struct daemon* daemon)
 	if(!edns_strings_apply_cfg(daemon->env->edns_strings, daemon->cfg))
 		fatal_exit("Could not set up EDNS strings");
 
+#ifdef USE_CACHEDB
+	daemon->env->cachedb_enabled = cachedb_is_enabled(&daemon->mods,
+		daemon->env);
+#endif
 	/* response-ip-xxx options don't work as expected without the respip
 	 * module.  To avoid run-time operational surprise we reject such
 	 * configuration. */
@@ -832,6 +846,10 @@ daemon_cleanup(struct daemon* daemon)
 		slabhash_clear(daemon->env->msg_cache);
 	}
 	daemon->old_num = daemon->num; /* save the current num */
+	forwards_delete(daemon->env->fwds);
+	daemon->env->fwds = NULL;
+	hints_delete(daemon->env->hints);
+	daemon->env->hints = NULL;
 	local_zones_delete(daemon->local_zones);
 	daemon->local_zones = NULL;
 	respip_set_delete(daemon->respip_set);
diff --git a/usr.sbin/unbound/daemon/remote.c b/usr.sbin/unbound/daemon/remote.c
index 5d79eafd23b..764ae8ffda3 100644
--- a/usr.sbin/unbound/daemon/remote.c
+++ b/usr.sbin/unbound/daemon/remote.c
@@ -1992,12 +1992,19 @@ static int
 print_root_fwds(RES* ssl, struct iter_forwards* fwds, uint8_t* root)
 {
 	struct delegpt* dp;
-	dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN);
-	if(!dp)
+	int nolock = 0;
+	dp = forwards_lookup(fwds, root, LDNS_RR_CLASS_IN, nolock);
+	if(!dp) {
 		return ssl_printf(ssl, "off (using root hints)\n");
+	}
 	/* if dp is returned it must be the root */
 	log_assert(query_dname_compare(dp->name, root)==0);
-	return ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp);
+	if(!ssl_print_name_dp(ssl, NULL, root, LDNS_RR_CLASS_IN, dp)) {
+		lock_rw_unlock(&fwds->lock);
+		return 0;
+	}
+	lock_rw_unlock(&fwds->lock);
+	return 1;
 }
 
 /** parse args into delegpt */
@@ -2069,6 +2076,7 @@ do_forward(RES* ssl, struct worker* worker, char* args)
 {
 	struct iter_forwards* fwd = worker->env.fwds;
 	uint8_t* root = (uint8_t*)"\000";
+	int nolock = 0;
 	if(!fwd) {
 		(void)ssl_printf(ssl, "error: structure not allocated\n");
 		return;
@@ -2082,12 +2090,12 @@ do_forward(RES* ssl, struct worker* worker, char* args)
 	/* delete all the existing queries first */
 	mesh_delete_all(worker->env.mesh);
 	if(strcmp(args, "off") == 0) {
-		forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root);
+		forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, root, nolock);
 	} else {
 		struct delegpt* dp;
 		if(!(dp = parse_delegpt(ssl, args, root)))
 			return;
-		if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
+		if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp, nolock)) {
 			(void)ssl_printf(ssl, "error out of memory\n");
 			return;
 		}
@@ -2097,7 +2105,7 @@ do_forward(RES* ssl, struct worker* worker, char* args)
 
 static int
 parse_fs_args(RES* ssl, char* args, uint8_t** nm, struct delegpt** dp,
-	int* insecure, int* prime)
+	int* insecure, int* prime, int* tls)
 {
 	char* zonename;
 	char* rest;
@@ -2112,6 +2120,8 @@ parse_fs_args(RES* ssl, char* args, uint8_t** nm, struct delegpt** dp,
 				*insecure = 1;
 			else if(*args == 'p' && prime)
 				*prime = 1;
+			else if(*args == 't' && tls)
+				*tls = 1;
 			else {
 				(void)ssl_printf(ssl, "error: unknown option %s\n", args);
 				return 0;
@@ -2144,25 +2154,33 @@ static void
 do_forward_add(RES* ssl, struct worker* worker, char* args)
 {
 	struct iter_forwards* fwd = worker->env.fwds;
-	int insecure = 0;
+	int insecure = 0, tls = 0;
 	uint8_t* nm = NULL;
 	struct delegpt* dp = NULL;
-	if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL))
+	int nolock = 1;
+	if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, NULL, &tls))
 		return;
+	if(tls)
+		dp->ssl_upstream = 1;
+	/* prelock forwarders for atomic operation with anchors */
+	lock_rw_wrlock(&fwd->lock);
 	if(insecure && worker->env.anchors) {
 		if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
 			nm)) {
+			lock_rw_unlock(&fwd->lock);
 			(void)ssl_printf(ssl, "error out of memory\n");
 			delegpt_free_mlc(dp);
 			free(nm);
 			return;
 		}
 	}
-	if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp)) {
+	if(!forwards_add_zone(fwd, LDNS_RR_CLASS_IN, dp, nolock)) {
+		lock_rw_unlock(&fwd->lock);
 		(void)ssl_printf(ssl, "error out of memory\n");
 		free(nm);
 		return;
 	}
+	lock_rw_unlock(&fwd->lock);
 	free(nm);
 	send_ok(ssl);
 }
@@ -2174,12 +2192,16 @@ do_forward_remove(RES* ssl, struct worker* worker, char* args)
 	struct iter_forwards* fwd = worker->env.fwds;
 	int insecure = 0;
 	uint8_t* nm = NULL;
-	if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
+	int nolock = 1;
+	if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL, NULL))
 		return;
+	/* prelock forwarders for atomic operation with anchors */
+	lock_rw_wrlock(&fwd->lock);
 	if(insecure && worker->env.anchors)
 		anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
 			nm);
-	forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm);
+	forwards_delete_zone(fwd, LDNS_RR_CLASS_IN, nm, nolock);
+	lock_rw_unlock(&fwd->lock);
 	free(nm);
 	send_ok(ssl);
 }
@@ -2189,38 +2211,53 @@ static void
 do_stub_add(RES* ssl, struct worker* worker, char* args)
 {
 	struct iter_forwards* fwd = worker->env.fwds;
-	int insecure = 0, prime = 0;
+	int insecure = 0, prime = 0, tls = 0;
 	uint8_t* nm = NULL;
 	struct delegpt* dp = NULL;
-	if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime))
-		return;
+	int nolock = 1;
+	if(!parse_fs_args(ssl, args, &nm, &dp, &insecure, &prime, &tls))
+		return;
+	if(tls)
+		dp->ssl_upstream = 1;
+	/* prelock forwarders and hints for atomic operation with anchors */
+	lock_rw_wrlock(&fwd->lock);
+	lock_rw_wrlock(&worker->env.hints->lock);
 	if(insecure && worker->env.anchors) {
 		if(!anchors_add_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
 			nm)) {
+			lock_rw_unlock(&fwd->lock);
+			lock_rw_unlock(&worker->env.hints->lock);
 			(void)ssl_printf(ssl, "error out of memory\n");
 			delegpt_free_mlc(dp);
 			free(nm);
 			return;
 		}
 	}
-	if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm)) {
+	if(!forwards_add_stub_hole(fwd, LDNS_RR_CLASS_IN, nm, nolock)) {
 		if(insecure && worker->env.anchors)
 			anchors_delete_insecure(worker->env.anchors,
 				LDNS_RR_CLASS_IN, nm);
+		lock_rw_unlock(&fwd->lock);
+		lock_rw_unlock(&worker->env.hints->lock);
 		(void)ssl_printf(ssl, "error out of memory\n");
 		delegpt_free_mlc(dp);
 		free(nm);
 		return;
 	}
-	if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime)) {
+	if(!hints_add_stub(worker->env.hints, LDNS_RR_CLASS_IN, dp, !prime,
+		nolock)) {
 		(void)ssl_printf(ssl, "error out of memory\n");
-		forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
+		forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm, nolock);
 		if(insecure && worker->env.anchors)
 			anchors_delete_insecure(worker->env.anchors,
 				LDNS_RR_CLASS_IN, nm);
+		lock_rw_unlock(&fwd->lock);
+		lock_rw_unlock(&worker->env.hints->lock);
 		free(nm);
 		return;
 	}
+	lock_rw_unlock(&fwd->lock);
+	lock_rw_unlock(&worker->env.hints->lock);
 	free(nm);
 	send_ok(ssl);
 }
@@ -2232,13 +2269,19 @@ do_stub_remove(RES* ssl, struct worker* worker, char* args)
 	struct iter_forwards* fwd = worker->env.fwds;
 	int insecure = 0;
 	uint8_t* nm = NULL;
-	if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL))
+	int nolock = 1;
+	if(!parse_fs_args(ssl, args, &nm, NULL, &insecure, NULL, NULL))
 		return;
+	/* prelock forwarders and hints for atomic operation with anchors */
+	lock_rw_wrlock(&fwd->lock);
+	lock_rw_wrlock(&worker->env.hints->lock);
 	if(insecure && worker->env.anchors)
 		anchors_delete_insecure(worker->env.anchors, LDNS_RR_CLASS_IN,
 			nm);
-	forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm);
-	hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm);
+	forwards_delete_stub_hole(fwd, LDNS_RR_CLASS_IN, nm, nolock);
+	hints_delete_stub(worker->env.hints, LDNS_RR_CLASS_IN, nm, nolock);
+	lock_rw_unlock(&fwd->lock);
+	lock_rw_unlock(&worker->env.hints->lock);
 	free(nm);
 	send_ok(ssl);
 }
@@ -2667,6 +2710,7 @@ do_list_forwards(RES* ssl, struct worker* worker)
 	struct iter_forward_zone* z;
 	struct trust_anchor* a;
 	int insecure;
+	lock_rw_rdlock(&fwds->lock);
 	RBTREE_FOR(z, struct iter_forward_zone*, fwds->tree) {
 		if(!z->dp) continue; /* skip empty marker for stub */
 
@@ -2681,9 +2725,12 @@ do_list_forwards(RES* ssl, struct worker* worker)
 		}
 
 		if(!ssl_print_name_dp(ssl, (insecure?"forward +i":"forward"),
-			z->name, z->dclass, z->dp))
+			z->name, z->dclass, z->dp)) {
+			lock_rw_unlock(&fwds->lock);
 			return;
+		}
 	}
+	lock_rw_unlock(&fwds->lock);
 }
 
 /** do the list_stubs command */
@@ -2694,6 +2741,7 @@ do_list_stubs(RES* ssl, struct worker* worker)
 	struct trust_anchor* a;
 	int insecure;
 	char str[32];
+	lock_rw_rdlock(&worker->env.hints->lock);
 	RBTREE_FOR(z, struct iter_hints_stub*, &worker->env.hints->tree) {
 
 		/* see if it is insecure */
@@ -2709,9 +2757,12 @@ do_list_stubs(RES* ssl, struct worker* worker)
 		snprintf(str, sizeof(str), "stub %sprime%s",
 			(z->noprime?"no":""), (insecure?" +i":""));
 		if(!ssl_print_name_dp(ssl, str, z->node.name,
-			z->node.dclass, z->dp))
+			z->node.dclass, z->dp)) {
+			lock_rw_unlock(&worker->env.hints->lock);
 			return;
+		}
 	}
+	lock_rw_unlock(&worker->env.hints->lock);
 }
 
 /** do the list_auth_zones command */
@@ -3071,26 +3122,6 @@ execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd,
 	} else if(cmdcmp(p, "auth_zone_transfer", 18)) {
 		do_auth_zone_transfer(ssl, worker, skipwhite(p+18));
 		return;
-	} else if(cmdcmp(p, "stub_add", 8)) {
-		/* must always distribute this cmd */
-		if(rc) distribute_cmd(rc, ssl, cmd);
-		do_stub_add(ssl, worker, skipwhite(p+8));
-		return;
-	} else if(cmdcmp(p, "stub_remove", 11)) {
-		/* must always distribute this cmd */
-		if(rc) distribute_cmd(rc, ssl, cmd);
-		do_stub_remove(ssl, worker, skipwhite(p+11));
-		return;
-	} else if(cmdcmp(p, "forward_add", 11)) {
-		/* must always distribute this cmd */
-		if(rc) distribute_cmd(rc, ssl, cmd);
-		do_forward_add(ssl, worker, skipwhite(p+11));
-		return;
-	} else if(cmdcmp(p, "forward_remove", 14)) {
-		/* must always distribute this cmd */
-		if(rc) distribute_cmd(rc, ssl, cmd);
-		do_forward_remove(ssl, worker, skipwhite(p+14));
-		return;
 	} else if(cmdcmp(p, "insecure_add", 12)) {
 		/* must always distribute this cmd */
 		if(rc) distribute_cmd(rc, ssl, cmd);
@@ -3101,11 +3132,6 @@ execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd,
 		if(rc) distribute_cmd(rc, ssl, cmd);
 		do_insecure_remove(ssl, worker, skipwhite(p+15));
 		return;
-	} else if(cmdcmp(p, "forward", 7)) {
-		/* must always distribute this cmd */
-		if(rc) distribute_cmd(rc, ssl, cmd);
-		do_forward(ssl, worker, skipwhite(p+7));
-		return;
 	} else if(cmdcmp(p, "flush_stats", 11)) {
 		/* must always distribute this cmd */
 		if(rc) distribute_cmd(rc, ssl, cmd);
@@ -3147,6 +3173,16 @@ execute_cmd(struct daemon_remote* rc, RES* ssl, char* cmd,
 		do_data_add(ssl, worker->daemon->local_zones, skipwhite(p+10));
 	} else if(cmdcmp(p, "local_datas", 11)) {
 		do_datas_add(ssl, worker->daemon->local_zones);
+	} else if(cmdcmp(p, "forward_add", 11)) {
+		do_forward_add(ssl, worker, skipwhite(p+11));
+	} else if(cmdcmp(p, "forward_remove", 14)) {
+		do_forward_remove(ssl, worker, skipwhite(p+14));
+	} else if(cmdcmp(p, "forward", 7)) {
+		do_forward(ssl, worker, skipwhite(p+7));
+	} else if(cmdcmp(p, "stub_add", 8)) {
+		do_stub_add(ssl, worker, skipwhite(p+8));
+	} else if(cmdcmp(p, "stub_remove", 11)) {
+		do_stub_remove(ssl, worker, skipwhite(p+11));
 	} else if(cmdcmp(p, "view_local_zone_remove", 22)) {
 		do_view_zone_remove(ssl, worker, skipwhite(p+22));
 	} else if(cmdcmp(p, "view_local_zone", 15)) {
diff --git a/usr.sbin/unbound/daemon/unbound.c b/usr.sbin/unbound/daemon/unbound.c
index 457a0803285..d6c371571d7 100644
--- a/usr.sbin/unbound/daemon/unbound.c
+++ b/usr.sbin/unbound/daemon/unbound.c
@@ -366,9 +366,8 @@ readpid (const char* file)
 /** write pid to file. 
  * @param pidfile: file name of pid file.
  * @param pid: pid to write to file.
- * @return false on failure
  */
-static int
+static void
 writepid (const char* pidfile, pid_t pid)
 {
 	int fd;
@@ -383,7 +382,7 @@ writepid (const char* pidfile, pid_t pid)
 		, 0644)) == -1) {
 		log_err("cannot open pidfile %s: %s", 
 			pidfile, strerror(errno));
-		return 0;
+		return;
 	}
 	while(count < strlen(pidbuf)) {
 		ssize_t r = write(fd, pidbuf+count, strlen(pidbuf)-count);
@@ -393,17 +392,16 @@ writepid (const char* pidfile, pid_t pid)
 			log_err("cannot write to pidfile %s: %s",
 				pidfile, strerror(errno));
 			close(fd);
-			return 0;
+			return;
 		} else if(r == 0) {
 			log_err("cannot write any bytes to pidfile %s: "
 				"write returns 0 bytes written", pidfile);
 			close(fd);
-			return 0;
+			return;
 		}
 		count += r;
 	}
 	close(fd);
-	return 1;
 }
 
 /**
@@ -545,7 +543,15 @@ perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
 				cfg, 1);
 		if(!daemon->pidfile)
 			fatal_exit("pidfile alloc: out of memory");
-		checkoldpid(daemon->pidfile, pidinchroot);
+		/* Check old pid if there is no username configured.
+		 * With a username, the assumption is that the privilege
+		 * drop makes a pidfile not removed when the server stopped
+		 * last time. The server does not chown the pidfile for it,
+		 * because that creates privilege escape problems, with the
+		 * pidfile writable by unprivileged users, but used by
+		 * privileged users. */
+		if(cfg->username && cfg->username[0])
+			checkoldpid(daemon->pidfile, pidinchroot);
 	}
 #endif
 
@@ -557,18 +563,7 @@ perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
 	/* write new pidfile (while still root, so can be outside chroot) */
 #ifdef HAVE_KILL
 	if(cfg->pidfile && cfg->pidfile[0] && need_pidfile) {
-		if(writepid(daemon->pidfile, getpid())) {
-			if(cfg->username && cfg->username[0] && cfg_uid != (uid_t)-1 &&
-				pidinchroot) {
-#  ifdef HAVE_CHOWN
-				if(chown(daemon->pidfile, cfg_uid, cfg_gid) == -1) {
-					verbose(VERB_QUERY, "cannot chown %u.%u %s: %s",
-						(unsigned)cfg_uid, (unsigned)cfg_gid,
-						daemon->pidfile, strerror(errno));
-				}
-#  endif /* HAVE_CHOWN */
-			}
-		}
+		writepid(daemon->pidfile, getpid());
 	}
 #else
 	(void)daemon;
@@ -746,7 +741,11 @@ run_daemon(const char* cfgfile, int cmdline_verbose, int debug_mode, int need_pi
 	if(daemon->pidfile) {
 		int fd;
 		/* truncate pidfile */
-		fd = open(daemon->pidfile, O_WRONLY | O_TRUNC, 0644);
+		fd = open(daemon->pidfile, O_WRONLY | O_TRUNC
+#ifdef O_NOFOLLOW
+			| O_NOFOLLOW
+#endif
+			, 0644);
 		if(fd != -1)
 			close(fd);
 		/* delete pidfile */
diff --git a/usr.sbin/unbound/daemon/worker.c b/usr.sbin/unbound/daemon/worker.c
index 176abf57d56..b35fe65a3a6 100644
--- a/usr.sbin/unbound/daemon/worker.c
+++ b/usr.sbin/unbound/daemon/worker.c
@@ -659,7 +659,12 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	if(rep->ttl < timenow) {
 		/* Check if we need to serve expired now */
 		if(worker->env.cfg->serve_expired &&
-			!worker->env.cfg->serve_expired_client_timeout) {
+			!worker->env.cfg->serve_expired_client_timeout
+#ifdef USE_CACHEDB
+			&& !(worker->env.cachedb_enabled &&
+			  worker->env.cfg->cachedb_check_when_serve_expired)
+#endif
+			) {
 				if(worker->env.cfg->serve_expired_ttl &&
 					rep->serve_expired_ttl < timenow)
 					return 0;
@@ -1454,8 +1459,8 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	 */
 	if(worker->dtenv.log_client_query_messages) {
 		log_addr(VERB_ALGO, "request from client", &repinfo->client_addr, repinfo->client_addrlen);
-		log_addr(VERB_ALGO, "to local addr", (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->socket->addr->ai_addrlen);
-		dt_msg_send_client_query(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, c->type, c->ssl, c->buffer,
+		log_addr(VERB_ALGO, "to local addr", (void*)repinfo->c->socket->addr, repinfo->c->socket->addrlen);
+		dt_msg_send_client_query(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr, c->type, c->ssl, c->buffer,
 		((worker->env.cfg->sock_queue_timeout && timeval_isset(&c->recv_tv))?&c->recv_tv:NULL));
 	}
 #endif
@@ -1943,10 +1948,10 @@ send_reply_rc:
 	/*
 	 * sending src (client)/dst (local service) addresses over DNSTAP from send_reply code label (when we serviced local zone for ex.)
 	 */
-	if(worker->dtenv.log_client_response_messages) {
-		log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->socket->addr->ai_addrlen);
+	if(worker->dtenv.log_client_response_messages && rc !=0) {
+		log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr, repinfo->c->socket->addrlen);
 		log_addr(VERB_ALGO, "response to client", &repinfo->client_addr, repinfo->client_addrlen);
-		dt_msg_send_client_response(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, c->type, c->ssl, c->buffer);
+		dt_msg_send_client_response(&worker->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr, c->type, c->ssl, c->buffer);
 	}
 #endif
 	if(worker->env.cfg->log_replies)
@@ -1961,13 +1966,13 @@ send_reply_rc:
 			log_reply_info(NO_VERBOSE, &qinfo,
 				&repinfo->client_addr, repinfo->client_addrlen,
 				tv, 1, c->buffer,
-				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr->ai_addr:NULL),
+				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr:NULL),
 				c->type);
 		} else {
 			log_reply_info(NO_VERBOSE, &qinfo,
 				&repinfo->client_addr, repinfo->client_addrlen,
 				tv, 1, c->buffer,
-				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr->ai_addr:NULL),
+				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr:NULL),
 				c->type);
 		}
 	}
@@ -2261,18 +2266,6 @@ worker_init(struct worker* worker, struct config_file *cfg,
 		worker_delete(worker);
 		return 0;
 	}
-	if(!(worker->env.fwds = forwards_create()) ||
-		!forwards_apply_cfg(worker->env.fwds, cfg)) {
-		log_err("Could not set forward zones");
-		worker_delete(worker);
-		return 0;
-	}
-	if(!(worker->env.hints = hints_create()) ||
-		!hints_apply_cfg(worker->env.hints, cfg)) {
-		log_err("Could not set root or stub hints");
-		worker_delete(worker);
-		return 0;
-	}
 	/* one probe timer per process -- if we have 5011 anchors */
 	if(autr_get_num_anchors(worker->env.anchors) > 0
 #ifndef THREADS_DISABLED
@@ -2345,8 +2338,6 @@ worker_delete(struct worker* worker)
 	outside_network_quit_prepare(worker->back);
 	mesh_delete(worker->env.mesh);
 	sldns_buffer_free(worker->env.scratch_buffer);
-	forwards_delete(worker->env.fwds);
-	hints_delete(worker->env.hints);
 	listen_delete(worker->front);
 	outside_network_delete(worker->back);
 	comm_signal_delete(worker->comsig);
diff --git a/usr.sbin/unbound/doc/Changelog b/usr.sbin/unbound/doc/Changelog
index 328e8328910..8d2ce0cde66 100644
--- a/usr.sbin/unbound/doc/Changelog
+++ b/usr.sbin/unbound/doc/Changelog
@@ -1,15 +1,194 @@
+1 May 2024: Wouter
+	- Fix for the DNSBomb vulnerability CVE-2024-33655. Thanks to Xiang Li
+	  from the Network and Information Security Lab of Tsinghua University
+	  for reporting it.
+	- Set version number to 1.20.0 for release.
+
+29 April 2024: Yorgos
+	- Cleanup unnecessary strdup calls for EDE strings.
+
+29 April 2024: Wouter
+	- Fix doxygen comment for errinf_to_str_bogus.
+
+26 April 2024: Wouter
+	- Fix cachedb with serve-expired-client-timeout disabled. The edns
+	  subnet module deletes global cache and cachedb cache when it
+	  stores a result, and serve-expired is enabled, so that the global
+	  reply, that is older than the ecs reply, does not return after
+	  the ecs reply expires.
+	- Add unit tests for cachedb and subnet cache expired data.
+	- Man page entry for unbound-checkconf -q.
+
+26 April 2024: Yorgos
+	- Fix #876: [FR] can unbound-checkconf be silenced when configuration
+	  is valid?
+
+25 April 2024: Wouter
+	- Fix configure flto check error, by finding grep for it.
+	- Merge #1041: Stub and Forward unshare. This has one structure
+	  for them and fixes #1038: fatal error: Could not initialize
+	  thread / error: reading root hints.
+	- Fix to disable fragmentation on systems with IP_DONTFRAG,
+	  with a nonzero value for the socket option argument.
+	- Fix doc unit test for out of directory build.
+
+24 April 2024: Wouter
+	- Fix ci workflow for macos for moved install locations.
+
+23 April 2024: Yorgos
+	- Merge #1053: Remove child delegations from cache when grandchild
+	  delegations are returned from parent.
+
+22 April 2024: Wouter
+	- Add checklock feature verbose_locking to trace locks and unlocks.
+	- Fix edns subnet to sort rrset references when storing messages
+	  in the cache. This fixes a race condition in the rrset locks.
+
+15 April 2024: Wouter
+	- Fix #1048: Update ax_pkg_swig.m4 and ax_pthread.m4.
+	- Fix configure, autoconf for #1048.
+
+15 April 2024: Yorgos
+	- Merge #1049 from Petr Menšík: Py_NoSiteFlag is not needed since
+	  Python 3.8
+
+12 April 2024: Wouter
+	- Fix cachedb for serve-expired with serve-expired-client-timeout.
+	- Fixup unit test for cachedb server expired client timeout with
+	  a check if response if from upstream or from cachedb.
+	- Fixup cachedb to not refetch when serve-expired-client-timeout is
+	  used.
+
+10 April 2024: Wouter
+	- Implement cachedb-check-when-serve-expired: yes option, default
+	  is enabled. When serve expired is enabled with cachedb, it first
+	  checks cachedb before serving the expired response.
+	- Fixup compile without cachedb.
+	- Add test for cachedb serve expired.
+	- Extended test for cachedb serve expired.
+	- Fix makefile dependencies for fake_event.c.
+	- Fix cachedb for serve-expired with serve-expired-reply-ttl.
+	- Fix to not reply serve expired unless enabled for cachedb.
+
+9 April 2024: Yorgos
+	- Merge #1043 from xiaoxiaoafeifei: Add loongarch support; updates
+	  config.guess(2024-01-01) and config.sub(2024-01-01), verified
+	  with upstream.
+
+8 April 2024: Yorgos
+	- Fix #595: unbound-anchor cannot deal with full disk; it will now
+	  first write out to a temp file before replacing the original one,
+	  like Unbound already does for auto-trust-anchor-file.
+
+5 April 2024: Wouter
+	- Fix comment syntax for view function views_find_view.
+
+5 April 2024: Yorgos
+	- Merge #1027: Introduce 'cache-min-negative-ttl' option.
+
+3 April 2024: Wouter
+	- Fix #1040: fix heap-buffer-overflow issue in function cfg_mark_ports
+	  of file util/config_file.c.
+	- For #1040: adjust error text and disallow negative ports in other
+	  parts of cfg_mark_ports.
+
+3 April 2024: Yorgos
+	- Fix #1035: Potential Bug while parsing port from the "stub-host"
+	  string; also affected forward-zones and remote-control host
+	  directives.
+	- Fix #369: dnstap showing extra responses; for client responses
+	  right from the cache when replying with expired data or
+	  prefetching.
+
+28 March 2024: Wouter
+	- Fix #1034: DoT forward-zone via unbound-control.
+	- Fix for crypto related failures to have a better error string.
+
+27 March 2024: Wouter
+	- Fix name of unit test for subnet cache response.
+	- Fix #1032: The size of subnet_msg_cache calculation mistake cause
+	  memory usage increased beyond expectations.
+	- Fix for #1032, add safeguard to make table space positive.
+	- Fix comment in lruhash space function.
+	- Fix to add unit test for lruhash space that exercises the routines.
+	- Fix that when the server truncates the pidfile, it does not follow
+	  symbolic links.
+	- Fix that the server does not chown the pidfile.
+
+25 March 2024: Yorgos
+	- Merge #831 from Pierre4012: Improve Windows NSIS installer
+	  script (setup.nsi).
+	- For #831: Format text, use exclamation icon and explicit label
+	  names.
+
+19 March 2024: Wouter
+	- Fix rpz so that rpz CNAME can apply after rpz CNAME. And fix that
+	  clientip and nsip can give a CNAME.
+	- Fix localdata and rpz localdata to match CNAME only if no direct
+	  type match is available.
+
+18 March 2024: Wouter
+	- Fix that rpz CNAME content is limited to the max number of cnames.
+	- Fix rpz, it follows iterator CNAMEs for nsip and nsdname and sets
+	  the reply query_info values, that is better for debug logging.
+	- Fix rpz that copies the cname override completely to the temp
+	  region, so there are no references to the rpz region.
+	- Add rpz unit test for nsip action override.
+	- Fix rpz for qtype CNAME after nameserver trigger.
+
+15 March 2024: Yorgos
+	- Merge #1030: Persist the openssl and expat directories for repeated
+	  Windows builds.
+
+15 March 2024: Wouter
+	- Fix that addrinfo is not kept around but copied and freed, so that
+	  log-destaddr uses a copy of the information, much like NSD does.
+
+13 March 2024: Wouter
+	- Fix #1029: rpz trigger clientip and action rpz-passthru not working
+	  as expected.
+	- Fix rpz that the rpz override is taken in case of clientip triggers.
+	  Fix that the clientip passthru action is logged. Fix that the
+	  clientip localdata action is logged. Fix rpz override action cname
+	  for the clientip trigger.
+	- Fix to unify codepath for local alias for rpz cname action override.
+	- Fix rpz for cname override action after nsdname and nsip triggers.
+
+12 March 2024: Yorgos
+	- Merge #1028: Clearer documentation for tcp-idle-timeout and
+	  edns-tcp-keepalive-timeout.
+
+11 March 2024: Wouter
+	- Fix #1021 Inconsistent Behavior with Changing rpz-cname-override
+	  and doing a unbound-control reload.
+
 8 March 2024: Wouter
 	- Fix unbound-control-setup.cmd to use 3072 bits so that certificates
-	  are long enough for newer OpenSSL versions.
-	- Fix TTL of synthesized CNAME when a DNAME is used from cache.
+	  are long enough for newer OpenSSL versions. This fix is included
+	  in 1.19.3rc2.
+	- Fix TTL of synthesized CNAME when a DNAME is used from cache. This
+	  fix is included in 1.19.3rc2.
+	- Remove unused portion from iter_dname_ttl unit test.
+	- Fix validator classification of qtype DNAME for positive and
+	  redirection answers, and fix validator signature routine for dealing
+	  with the synthesized CNAME for a DNAME without previously
+	  encountering it and also for when the qtype is DNAME.
+	- Fix qname minimisation for reply with a DNAME for qtype CNAME that
+	  answers it.
+	- Fix doc test so it ignores but outputs unsupported doxygen options.
 	- Fix unbound-control-setup.cmd to have CA v3 basicConstraints,
-	  like unbound-control-setup.sh has.
+	  like unbound-control-setup.sh has. This fix is included in 1.19.3rc2.
+
+8 March 2024: Yorgos
+	- Update doc/unbound.doxygen with 'doxygen -u'. Fixes option
+	  deprecation warnings and updates with newer defaults.
 
 7 March 2024: Wouter
 	- Version set to 1.19.3 for release. After 1.19.2 point release with
 	  security fix for CVE-2024-1931, Denial of service when trimming
 	  EDE text on positive replies. The code repo includes the fix and
-	  is for version 1.19.3.
+	  is for version 1.19.3. The code repo continues for version 1.19.4,
+	  but 1.19.3 includes the fixes in 1.19.3rc2 as well.
 
 5 March 2024: Wouter
 	- Fix for #1022: Fix ede prohibited in access control refused answers.
diff --git a/usr.sbin/unbound/doc/README b/usr.sbin/unbound/doc/README
index b92f649ef30..5f81ad25883 100644
--- a/usr.sbin/unbound/doc/README
+++ b/usr.sbin/unbound/doc/README
@@ -1,4 +1,4 @@
-README for Unbound 1.19.3
+README for Unbound 1.20.0
 Copyright 2007 NLnet Labs
 http://unbound.net
 
diff --git a/usr.sbin/unbound/doc/example.conf.in b/usr.sbin/unbound/doc/example.conf.in
index 0e758332528..0564fd5a074 100644
--- a/usr.sbin/unbound/doc/example.conf.in
+++ b/usr.sbin/unbound/doc/example.conf.in
@@ -1,7 +1,7 @@
 #
 # Example configuration file.
 #
-# See unbound.conf(5) man page, version 1.19.3.
+# See unbound.conf(5) man page, version 1.20.0.
 #
 # this is a comment.
 
@@ -191,6 +191,21 @@ server:
 	# are behind a slow satellite link, to eg. 1128.
 	# unknown-server-time-limit: 376
 
+	# msec before recursion replies are dropped. The work item continues.
+	# discard-timeout: 1900
+
+	# Max number of replies waiting for recursion per IP address.
+	# wait-limit: 1000
+
+	# Max replies waiting for recursion for IP address with cookie.
+	# wait-limit-cookie: 10000
+
+	# Apart from the default, the wait limit can be set for a netblock.
+	# wait-limit-netblock: 192.0.2.0/24 50000
+
+	# Apart from the default, the wait limit with cookie can be adjusted.
+	# wait-limit-cookie-netblock: 192.0.2.0/24 50000
+
 	# the amount of memory to use for the RRset cache.
 	# plain value in bytes or you can append k, m or G. default is "4Mb".
 	# rrset-cache-size: 4m
@@ -211,6 +226,11 @@ server:
 	# the time to live (TTL) value cap for negative responses in the cache
 	# cache-max-negative-ttl: 3600
 
+	# the time to live (TTL) value lower bound, in seconds. Default 0.
+	# For negative responses in the cache. If disabled, default,
+	# cache-min-tll applies if configured.
+	# cache-min-negative-ttl: 0
+
 	# the time to live (TTL) value for cached roundtrip times, lameness and
 	# EDNS version information for hosts. In seconds.
 	# infra-host-ttl: 900
@@ -283,7 +303,8 @@ server:
 	# Enable EDNS TCP keepalive option.
 	# edns-tcp-keepalive: no
 
-	# Timeout for EDNS TCP keepalive, in msec.
+	# Timeout for EDNS TCP keepalive, in msec. Overrides tcp-idle-timeout
+	# if edns-tcp-keepalive is set.
 	# edns-tcp-keepalive-timeout: 120000
 
 	# UDP queries that have waited in the socket buffer for a long time
@@ -1247,6 +1268,9 @@ remote-control:
 #     secret-seed: "default"
 #     # if the backend should be read from, but not written to.
 #     cachedb-no-store: no
+#     # if the cachedb should be checked before a serve-expired response is
+#     # given, when serve-expired is enabled.
+#     cachedb-check-when-serve-expired: yes
 #
 #     # For "redis" backend:
 #     # (to enable, use --with-libhiredis to configure before compiling)
diff --git a/usr.sbin/unbound/doc/libunbound.3.in b/usr.sbin/unbound/doc/libunbound.3.in
index aeffa951651..f1e62c81ab7 100644
--- a/usr.sbin/unbound/doc/libunbound.3.in
+++ b/usr.sbin/unbound/doc/libunbound.3.in
@@ -1,4 +1,4 @@
-.TH "libunbound" "3" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "libunbound" "3" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" libunbound.3 -- unbound library functions manual
 .\"
@@ -44,7 +44,7 @@
 .B ub_ctx_zone_remove,
 .B ub_ctx_data_add,
 .B ub_ctx_data_remove
-\- Unbound DNS validating resolver 1.19.3 functions.
+\- Unbound DNS validating resolver 1.20.0 functions.
 .SH "SYNOPSIS"
 .B #include <unbound.h>
 .LP
diff --git a/usr.sbin/unbound/doc/unbound-anchor.8.in b/usr.sbin/unbound/doc/unbound-anchor.8.in
index f372d58e278..edab220a959 100644
--- a/usr.sbin/unbound/doc/unbound-anchor.8.in
+++ b/usr.sbin/unbound/doc/unbound-anchor.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-anchor" "8" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound-anchor" "8" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound-anchor.8 -- unbound anchor maintenance utility manual
 .\"
diff --git a/usr.sbin/unbound/doc/unbound-checkconf.8.in b/usr.sbin/unbound/doc/unbound-checkconf.8.in
index cde6d5c7aef..75a26e411b7 100644
--- a/usr.sbin/unbound/doc/unbound-checkconf.8.in
+++ b/usr.sbin/unbound/doc/unbound-checkconf.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-checkconf" "8" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound-checkconf" "8" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound-checkconf.8 -- unbound configuration checker manual
 .\"
@@ -14,6 +14,7 @@ unbound\-checkconf
 .B unbound\-checkconf
 .RB [ \-h ]
 .RB [ \-f ]
+.RB [ \-q ]
 .RB [ \-o
 .IR option ]
 .RI [ cfgfile ]
@@ -37,6 +38,9 @@ Print full pathname, with chroot applied to it.  Use with the \-o option.
 If given, after checking the config file the value of this option is
 printed to stdout.  For "" (disabled) options an empty line is printed.
 .TP
+.B \-q
+Make the operation quiet, suppress output on success.
+.TP
 .I cfgfile
 The config file to read with settings for Unbound. It is checked.
 If omitted, the config file at the default location is checked.
diff --git a/usr.sbin/unbound/doc/unbound-control.8.in b/usr.sbin/unbound/doc/unbound-control.8.in
index 4de6988ba0c..251dde7642c 100644
--- a/usr.sbin/unbound/doc/unbound-control.8.in
+++ b/usr.sbin/unbound/doc/unbound-control.8.in
@@ -1,4 +1,4 @@
-.TH "unbound-control" "8" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound-control" "8" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound-control.8 -- unbound remote control manual
 .\"
@@ -239,22 +239,24 @@ still be bogus, use \fBflush_zone\fR to remove it), does not affect the config f
 .B insecure_remove \fIzone
 Removes domain\-insecure for the given zone.
 .TP
-.B forward_add \fR[\fI+i\fR] \fIzone addr ...
+.B forward_add \fR[\fI+it\fR] \fIzone addr ...
 Add a new forward zone to running Unbound.  With +i option also adds a
 \fIdomain\-insecure\fR for the zone (so it can resolve insecurely if you have
 a DNSSEC root trust anchor configured for other names).
 The addr can be IP4, IP6 or nameserver names, like \fIforward-zone\fR config
 in unbound.conf.
+The +t option sets it to use tls upstream, like \fIforward\-tls\-upstream\fR: yes.
 .TP
 .B forward_remove \fR[\fI+i\fR] \fIzone
 Remove a forward zone from running Unbound.  The +i also removes a
 \fIdomain\-insecure\fR for the zone.
 .TP
-.B stub_add \fR[\fI+ip\fR] \fIzone addr ...
+.B stub_add \fR[\fI+ipt\fR] \fIzone addr ...
 Add a new stub zone to running Unbound.  With +i option also adds a
 \fIdomain\-insecure\fR for the zone.  With +p the stub zone is set to prime,
 without it it is set to notprime.  The addr can be IP4, IP6 or nameserver
 names, like the \fIstub-zone\fR config in unbound.conf.
+The +t option sets it to use tls upstream, like \fIstub\-tls\-upstream\fR: yes.
 .TP
 .B stub_remove \fR[\fI+i\fR] \fIzone
 Remove a stub zone from running Unbound.  The +i also removes a
diff --git a/usr.sbin/unbound/doc/unbound-host.1.in b/usr.sbin/unbound/doc/unbound-host.1.in
index aacaa0e2eb3..6192480cd5e 100644
--- a/usr.sbin/unbound/doc/unbound-host.1.in
+++ b/usr.sbin/unbound/doc/unbound-host.1.in
@@ -1,4 +1,4 @@
-.TH "unbound\-host" "1" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound\-host" "1" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound-host.1 -- unbound DNS lookup utility
 .\"
diff --git a/usr.sbin/unbound/doc/unbound.8.in b/usr.sbin/unbound/doc/unbound.8.in
index 542c71e5248..749f5c99cc2 100644
--- a/usr.sbin/unbound/doc/unbound.8.in
+++ b/usr.sbin/unbound/doc/unbound.8.in
@@ -1,4 +1,4 @@
-.TH "unbound" "8" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound" "8" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound.8 -- unbound manual
 .\"
@@ -9,7 +9,7 @@
 .\"
 .SH "NAME"
 .B unbound
-\- Unbound DNS validating resolver 1.19.3.
+\- Unbound DNS validating resolver 1.20.0.
 .SH "SYNOPSIS"
 .B unbound
 .RB [ \-h ]
diff --git a/usr.sbin/unbound/doc/unbound.conf.5.in b/usr.sbin/unbound/doc/unbound.conf.5.in
index 7f2f388cb03..c8c8e759160 100644
--- a/usr.sbin/unbound/doc/unbound.conf.5.in
+++ b/usr.sbin/unbound/doc/unbound.conf.5.in
@@ -1,4 +1,4 @@
-.TH "unbound.conf" "5" "Mar 14, 2024" "NLnet Labs" "unbound 1.19.3"
+.TH "unbound.conf" "5" "May  8, 2024" "NLnet Labs" "unbound 1.20.0"
 .\"
 .\" unbound.conf.5 -- unbound.conf manual
 .\"
@@ -266,6 +266,36 @@ Increase this if you are behind a slow satellite link, to eg. 1128.
 That would then avoid re\-querying every initial query because it times out.
 Default is 376 msec.
 .TP
+.B discard\-timeout: \fI<msec>
+The wait time in msec where recursion requests are dropped. This is
+to stop a large number of replies from accumulating. They receive
+no reply, the work item continues to recurse. It is nice to be a bit
+larger than serve\-expired\-client\-timeout if that is enabled.
+A value of 1900 msec is suggested. The value 0 disables it.
+Default 1900 msec.
+.TP
+.B wait\-limit: \fI<number>
+The number of replies that can wait for recursion, for an IP address.
+This makes a ratelimit per IP address of waiting replies for recursion.
+It stops very large amounts of queries waiting to be returned to one
+destination. The value 0 disables wait limits. Default is 1000.
+.TP
+.B wait\-limit\-cookie: \fI<number>
+The number of replies that can wait for recursion, for an IP address
+that sent the query with a valid DNS cookie. Since the cookie validates
+the client address, the limit can be higher. Default is 10000.
+.TP
+.B wait\-limit\-netblock: \fI<netblock> <number>
+The wait limit for the netblock. If not given the wait\-limit value is
+used. The most specific netblock is used to determine the limit. Useful for
+overriding the default for a specific, group or individual, server.
+The value -1 disables wait limits for the netblock.
+.TP
+.B wait\-limit\-cookie\-netblock: \fI<netblock> <number>
+The wait limit for the netblock, when the query has a DNS cookie.
+If not given, the wait\-limit\-cookie value is used.
+The value -1 disables wait limits for the netblock.
+.TP
 .B so\-rcvbuf: \fI<number>
 If not 0, then set the SO_RCVBUF socket option to get more buffer
 space on UDP port 53 incoming queries.  So that short spikes on busy
@@ -352,6 +382,15 @@ Time to live maximum for negative responses, these have a SOA in the
 authority section that is limited in time.  Default is 3600.
 This applies to nxdomain and nodata answers.
 .TP
+.B cache\-min\-negative\-ttl: \fI<seconds>
+Time to live minimum for negative responses, these have a SOA in the
+authority section that is limited in time.
+Default is 0 (disabled).
+If this is disabled and \fBcache-min-ttl\fR is configured, it will take effect
+instead.
+In that case you can set this to 1 to honor the upstream TTL.
+This applies to nxdomain and nodata answers.
+.TP
 .B infra\-host\-ttl: \fI<seconds>
 Time to live for entries in the host cache. The host cache contains
 roundtrip timing, lameness and EDNS support information. Default is 900.
@@ -436,6 +475,8 @@ configured value if the number of free buffers falls below 35% of the
 total number configured, and finally to 0 if the number of free buffers
 falls below 20% of the total number configured. A minimum timeout of
 200 milliseconds is observed regardless of the option value used.
+It will be overriden by \fBedns\-tcp\-keepalive\-timeout\fR if
+\fBedns\-tcp\-keepalive\fR is enabled.
 .TP
 .B tcp-reuse-timeout: \fI<msec>\fR
 The period Unbound will keep TCP persistent connections open to
@@ -454,20 +495,11 @@ This option defaults to 3000 milliseconds.
 Enable or disable EDNS TCP Keepalive. Default is no.
 .TP
 .B edns-tcp-keepalive-timeout: \fI<msec>\fR
-The period Unbound will wait for a query on a TCP connection when
-EDNS TCP Keepalive is active. If this timeout expires Unbound closes
-the connection. If the client supports the EDNS TCP Keepalive option,
+Overrides \fBtcp\-idle\-timeout\fR when \fBedns\-tcp\-keepalive\fR is enabled.
+If the client supports the EDNS TCP Keepalive option,
 Unbound sends the timeout value to the client to encourage it to
 close the connection before the server times out.
 This option defaults to 120000 milliseconds.
-When the number of free incoming TCP buffers falls below 50% of
-the total number configured, the advertised timeout is progressively
-reduced to 1% of the configured value, then to 0.2% of the configured
-value if the number of free buffers falls below 35% of the total number
-configured, and finally to 0 if the number of free buffers falls below
-20% of the total number configured.
-A minimum actual timeout of 200 milliseconds is observed regardless of the
-advertised timeout.
 .TP
 .B sock\-queue\-timeout: \fI<sec>\fR
 UDP queries that have waited in the socket buffer for a long time can be
@@ -2593,11 +2625,7 @@ If Unbound cannot even find an answer in the backend, it resolves the
 query as usual, and stores the answer in the backend.
 .P
 This module interacts with the \fBserve\-expired\-*\fR options and will reply
-with expired data if Unbound is configured for that.  Currently the use
-of \fBserve\-expired\-client\-timeout:\fR and
-\fBserve\-expired\-reply\-ttl:\fR is not consistent for data originating from
-the external cache as these will result in a reply with 0 TTL without trying to
-update the data first, ignoring the configured values.
+with expired data if Unbound is configured for that.
 .P
 If Unbound was built with
 \fB\-\-with\-libhiredis\fR
@@ -2653,6 +2681,16 @@ This option defaults to "default".
 If the backend should be read from, but not written to. This makes this
 instance not store dns messages in the backend. But if data is available it
 is retrieved. The default is no.
+.TP
+.B cachedb-check-when-serve-expired: \fI<yes or no>\fR
+If enabled, the cachedb is checked before an expired response is returned.
+When \fBserve\-expired\fR is enabled, without \fBserve\-expired\-client\-timeout\fR, it then
+does not immediately respond with an expired response from cache, but instead
+first checks the cachedb for valid contents, and if so returns it. If the
+cachedb also has no valid contents, the serve expired response is sent.
+If also \fBserve\-expired\-client\-timeout\fR is enabled, the expired response
+is delayed until the timeout expires. Unless the lookup succeeds within the
+timeout. The default is yes.
 .P
 The following
 .B cachedb
diff --git a/usr.sbin/unbound/doc/unbound.doxygen b/usr.sbin/unbound/doc/unbound.doxygen
index 7222dbc274e..996229118d7 100644
--- a/usr.sbin/unbound/doc/unbound.doxygen
+++ b/usr.sbin/unbound/doc/unbound.doxygen
@@ -1,96 +1,151 @@
-# Doxyfile 1.7.1
+# Doxyfile 1.9.7
 
 # This file describes the settings to be used by the documentation system
-# doxygen (www.doxygen.org) for a project
+# doxygen (www.doxygen.org) for a project.
 #
-# All text after a hash (#) is considered a comment and will be ignored
+# All text after a double hash (##) is considered a comment and is placed in
+# front of the TAG it is preceding.
+#
+# All text after a single hash (#) is considered a comment and will be ignored.
 # The format is:
-#       TAG = value [value, ...]
-# For lists items can also be appended using:
-#       TAG += value [value, ...]
-# Values that contain spaces should be placed between quotes (" ")
+# TAG = value [value, ...]
+# For lists, items can also be appended using:
+# TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (\" \").
+#
+# Note:
+#
+# Use doxygen to compare the used configuration file with the template
+# configuration file:
+# doxygen -x [configFile]
+# Use doxygen to compare the used configuration file with the template
+# configuration file without replacing the environment variables or CMake type
+# replacement variables:
+# doxygen -x_noenv [configFile]
 
 #---------------------------------------------------------------------------
 # Project related configuration options
 #---------------------------------------------------------------------------
 
-# This tag specifies the encoding used for all characters in the config file
-# that follow. The default is UTF-8 which is also the encoding used for all
+# This tag specifies the encoding used for all characters in the configuration
+# file that follow. The default is UTF-8 which is also the encoding used for all
 # text before the first occurrence of this tag. Doxygen uses libiconv (or the
 # iconv built into libc) for the transcoding. See
-# http://www.gnu.org/software/libiconv for the list of possible encodings.
+# https://www.gnu.org/software/libiconv/ for the list of possible encodings.
+# The default value is: UTF-8.
 
 DOXYFILE_ENCODING      = UTF-8
 
-# The PROJECT_NAME tag is a single word (or a sequence of words surrounded
-# by quotes) that should identify the project.
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by
+# double-quotes, unless you are using Doxywizard) that should identify the
+# project for which the documentation is generated. This name is used in the
+# title of most generated pages and in a few other places.
+# The default value is: My Project.
 
 PROJECT_NAME           = unbound
 
-# The PROJECT_NUMBER tag can be used to enter a project or revision number.
-# This could be handy for archiving the generated documentation or
-# if some version control system is used.
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. This
+# could be handy for archiving the generated documentation or if some version
+# control system is used.
 
 PROJECT_NUMBER         = 0.1
 
-# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
-# base path where the generated documentation will be put.
-# If a relative path is entered, it will be relative to the location
-# where doxygen was started. If left blank the current directory will be used.
+# Using the PROJECT_BRIEF tag one can provide an optional one line description
+# for a project that appears at the top of each page and should give viewer a
+# quick idea about the purpose of the project. Keep the description short.
+
+PROJECT_BRIEF          =
+
+# With the PROJECT_LOGO tag one can specify a logo or an icon that is included
+# in the documentation. The maximum height of the logo should not exceed 55
+# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
+# the logo to the output directory.
+
+PROJECT_LOGO           =
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
+# into which the generated documentation will be written. If a relative path is
+# entered, it will be relative to the location where doxygen was started. If
+# left blank the current directory will be used.
 
 OUTPUT_DIRECTORY       = doc
 
-# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create
-# 4096 sub-directories (in 2 levels) under the output directory of each output
-# format and will distribute the generated files over these directories.
-# Enabling this option can be useful when feeding doxygen a huge amount of
-# source files, where putting all generated files in the same directory would
-# otherwise cause performance problems for the file system.
+# If the CREATE_SUBDIRS tag is set to YES then doxygen will create up to 4096
+# sub-directories (in 2 levels) under the output directory of each output format
+# and will distribute the generated files over these directories. Enabling this
+# option can be useful when feeding doxygen a huge amount of source files, where
+# putting all generated files in the same directory would otherwise causes
+# performance problems for the file system. Adapt CREATE_SUBDIRS_LEVEL to
+# control the number of sub-directories.
+# The default value is: NO.
 
 CREATE_SUBDIRS         = NO
 
+# Controls the number of sub-directories that will be created when
+# CREATE_SUBDIRS tag is set to YES. Level 0 represents 16 directories, and every
+# level increment doubles the number of directories, resulting in 4096
+# directories at level 8 which is the default and also the maximum value. The
+# sub-directories are organized in 2 levels, the first level always has a fixed
+# number of 16 directories.
+# Minimum value: 0, maximum value: 8, default value: 8.
+# This tag requires that the tag CREATE_SUBDIRS is set to YES.
+
+CREATE_SUBDIRS_LEVEL   = 8
+
+# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
+# characters to appear in the names of generated files. If set to NO, non-ASCII
+# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode
+# U+3044.
+# The default value is: NO.
+
+ALLOW_UNICODE_NAMES    = NO
+
 # The OUTPUT_LANGUAGE tag is used to specify the language in which all
 # documentation generated by doxygen is written. Doxygen will use this
 # information to generate all constant output in the proper language.
-# The default language is English, other supported languages are:
-# Afrikaans, Arabic, Brazilian, Catalan, Chinese, Chinese-Traditional,
-# Croatian, Czech, Danish, Dutch, Esperanto, Farsi, Finnish, French, German,
-# Greek, Hungarian, Italian, Japanese, Japanese-en (Japanese with English
-# messages), Korean, Korean-en, Lithuanian, Norwegian, Macedonian, Persian,
-# Polish, Portuguese, Romanian, Russian, Serbian, Serbian-Cyrilic, Slovak,
-# Slovene, Spanish, Swedish, Ukrainian, and Vietnamese.
+# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Bulgarian,
+# Catalan, Chinese, Chinese-Traditional, Croatian, Czech, Danish, Dutch, English
+# (United States), Esperanto, Farsi (Persian), Finnish, French, German, Greek,
+# Hindi, Hungarian, Indonesian, Italian, Japanese, Japanese-en (Japanese with
+# English messages), Korean, Korean-en (Korean with English messages), Latvian,
+# Lithuanian, Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese,
+# Romanian, Russian, Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish,
+# Swedish, Turkish, Ukrainian and Vietnamese.
+# The default value is: English.
 
 OUTPUT_LANGUAGE        = English
 
-# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will
-# include brief member descriptions after the members that are listed in
-# the file and class documentation (similar to JavaDoc).
-# Set to NO to disable this.
+# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member
+# descriptions after the members that are listed in the file and class
+# documentation (similar to Javadoc). Set to NO to disable this.
+# The default value is: YES.
 
 BRIEF_MEMBER_DESC      = YES
 
-# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend
-# the brief description of a member or function before the detailed description.
-# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
+# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
+# description of a member or function before the detailed description
+#
+# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
 # brief descriptions will be completely suppressed.
+# The default value is: YES.
 
 REPEAT_BRIEF           = YES
 
-# This tag implements a quasi-intelligent brief description abbreviator
-# that is used to form the text in various listings. Each string
-# in this list, if found as the leading text of the brief description, will be
-# stripped from the text and the result after processing the whole list, is
-# used as the annotated text. Otherwise, the brief description is used as-is.
-# If left blank, the following values are used ("$name" is automatically
-# replaced with the name of the entity): "The $name class" "The $name widget"
-# "The $name file" "is" "provides" "specifies" "contains"
-# "represents" "a" "an" "the"
+# This tag implements a quasi-intelligent brief description abbreviator that is
+# used to form the text in various listings. Each string in this list, if found
+# as the leading text of the brief description, will be stripped from the text
+# and the result, after processing the whole list, is used as the annotated
+# text. Otherwise, the brief description is used as-is. If left blank, the
+# following values are used ($name is automatically replaced with the name of
+# the entity):The $name class, The $name widget, The $name file, is, provides,
+# specifies, contains, represents, a, an and the.
 
 ABBREVIATE_BRIEF       =
 
 # If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
-# Doxygen will generate a detailed section even if there is only a brief
+# doxygen will generate a detailed section even if there is only a brief
 # description.
+# The default value is: NO.
 
 ALWAYS_DETAILED_SEC    = NO
 
@@ -98,521 +153,844 @@ ALWAYS_DETAILED_SEC    = NO
 # inherited members of a class in the documentation of that class as if those
 # members were ordinary class members. Constructors, destructors and assignment
 # operators of the base classes will not be shown.
+# The default value is: NO.
 
 INLINE_INHERITED_MEMB  = NO
 
-# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full
-# path before files name in the file list and in the header files. If set
-# to NO the shortest path that makes the file name unique will be used.
+# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path
+# before files name in the file list and in the header files. If set to NO the
+# shortest path that makes the file name unique will be used
+# The default value is: YES.
 
 FULL_PATH_NAMES        = YES
 
-# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag
-# can be used to strip a user-defined part of the path. Stripping is
-# only done if one of the specified strings matches the left-hand part of
-# the path. The tag can be used to show relative paths in the file list.
-# If left blank the directory from which doxygen is run is used as the
-# path to strip.
+# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path.
+# Stripping is only done if one of the specified strings matches the left-hand
+# part of the path. The tag can be used to show relative paths in the file list.
+# If left blank the directory from which doxygen is run is used as the path to
+# strip.
+#
+# Note that you can specify absolute paths here, but also relative paths, which
+# will be relative from the directory where doxygen is started.
+# This tag requires that the tag FULL_PATH_NAMES is set to YES.
 
 STRIP_FROM_PATH        =
 
-# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of
-# the path mentioned in the documentation of a class, which tells
-# the reader which header file to include in order to use a class.
-# If left blank only the name of the header file containing the class
-# definition is used. Otherwise one should specify the include paths that
-# are normally passed to the compiler using the -I flag.
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
+# path mentioned in the documentation of a class, which tells the reader which
+# header file to include in order to use a class. If left blank only the name of
+# the header file containing the class definition is used. Otherwise one should
+# specify the list of include paths that are normally passed to the compiler
+# using the -I flag.
 
 STRIP_FROM_INC_PATH    =
 
-# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter
-# (but less readable) file names. This can be useful is your file systems
-# doesn't support long names like on DOS, Mac, or CD-ROM.
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
+# less readable) file names. This can be useful is your file systems doesn't
+# support long names like on DOS, Mac, or CD-ROM.
+# The default value is: NO.
 
 SHORT_NAMES            = NO
 
-# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen
-# will interpret the first line (until the first dot) of a JavaDoc-style
-# comment as the brief description. If set to NO, the JavaDoc
-# comments will behave just like regular Qt-style comments
-# (thus requiring an explicit @brief command for a brief description.)
+# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
+# first line (until the first dot) of a Javadoc-style comment as the brief
+# description. If set to NO, the Javadoc-style will behave just like regular Qt-
+# style comments (thus requiring an explicit @brief command for a brief
+# description.)
+# The default value is: NO.
 
 JAVADOC_AUTOBRIEF      = YES
 
-# If the QT_AUTOBRIEF tag is set to YES then Doxygen will
-# interpret the first line (until the first dot) of a Qt-style
-# comment as the brief description. If set to NO, the comments
-# will behave just like regular Qt-style comments (thus requiring
-# an explicit \brief command for a brief description.)
+# If the JAVADOC_BANNER tag is set to YES then doxygen will interpret a line
+# such as
+# /***************
+# as being the beginning of a Javadoc-style comment "banner". If set to NO, the
+# Javadoc-style will behave just like regular comments and it will not be
+# interpreted by doxygen.
+# The default value is: NO.
+
+JAVADOC_BANNER         = NO
+
+# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
+# line (until the first dot) of a Qt-style comment as the brief description. If
+# set to NO, the Qt-style will behave just like regular Qt-style comments (thus
+# requiring an explicit \brief command for a brief description.)
+# The default value is: NO.
 
 QT_AUTOBRIEF           = NO
 
-# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen
-# treat a multi-line C++ special comment block (i.e. a block of //! or ///
-# comments) as a brief description. This used to be the default behaviour.
-# The new default is to treat a multi-line C++ comment block as a detailed
-# description. Set this tag to YES if you prefer the old behaviour instead.
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
+# multi-line C++ special comment block (i.e. a block of //! or /// comments) as
+# a brief description. This used to be the default behavior. The new default is
+# to treat a multi-line C++ comment block as a detailed description. Set this
+# tag to YES if you prefer the old behavior instead.
+#
+# Note that setting this tag to YES also means that rational rose comments are
+# not recognized any more.
+# The default value is: NO.
 
 MULTILINE_CPP_IS_BRIEF = NO
 
-# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented
-# member inherits the documentation from any documented member that it
-# re-implements.
+# By default Python docstrings are displayed as preformatted text and doxygen's
+# special commands cannot be used. By setting PYTHON_DOCSTRING to NO the
+# doxygen's special commands can be used and the contents of the docstring
+# documentation blocks is shown as doxygen documentation.
+# The default value is: YES.
+
+PYTHON_DOCSTRING       = YES
+
+# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the
+# documentation from any documented member that it re-implements.
+# The default value is: YES.
 
 INHERIT_DOCS           = YES
 
-# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce
-# a new page for each member. If set to NO, the documentation of a member will
-# be part of the file/class/namespace that contains it.
+# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new
+# page for each member. If set to NO, the documentation of a member will be part
+# of the file/class/namespace that contains it.
+# The default value is: NO.
 
 SEPARATE_MEMBER_PAGES  = NO
 
-# The TAB_SIZE tag can be used to set the number of spaces in a tab.
-# Doxygen uses this value to replace tabs by spaces in code fragments.
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
+# uses this value to replace tabs by spaces in code fragments.
+# Minimum value: 1, maximum value: 16, default value: 4.
 
 TAB_SIZE               = 8
 
-# This tag can be used to specify a number of aliases that acts
-# as commands in the documentation. An alias has the form "name=value".
-# For example adding "sideeffect=\par Side Effects:\n" will allow you to
-# put the command \sideeffect (or @sideeffect) in the documentation, which
-# will result in a user-defined paragraph with heading "Side Effects:".
-# You can put \n's in the value part of an alias to insert newlines.
+# This tag can be used to specify a number of aliases that act as commands in
+# the documentation. An alias has the form:
+# name=value
+# For example adding
+# "sideeffect=@par Side Effects:^^"
+# will allow you to put the command \sideeffect (or @sideeffect) in the
+# documentation, which will result in a user-defined paragraph with heading
+# "Side Effects:". Note that you cannot put \n's in the value part of an alias
+# to insert newlines (in the resulting output). You can put ^^ in the value part
+# of an alias to insert a newline as if a physical newline was in the original
+# file. When you need a literal { or } or , in the value part of an alias you
+# have to escape them by means of a backslash (\), this can lead to conflicts
+# with the commands \{ and \} for these it is advised to use the version @{ and
+# @} or use a double escape (\\{ and \\})
 
 ALIASES                =
 
-# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C
-# sources only. Doxygen will then generate output that is more tailored for C.
-# For instance, some of the names that are used will be different. The list
-# of all members will be omitted, etc.
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
+# only. Doxygen will then generate output that is more tailored for C. For
+# instance, some of the names that are used will be different. The list of all
+# members will be omitted, etc.
+# The default value is: NO.
 
 OPTIMIZE_OUTPUT_FOR_C  = YES
 
-# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java
-# sources only. Doxygen will then generate output that is more tailored for
-# Java. For instance, namespaces will be presented as packages, qualified
-# scopes will look different, etc.
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or
+# Python sources only. Doxygen will then generate output that is more tailored
+# for that language. For instance, namespaces will be presented as packages,
+# qualified scopes will look different, etc.
+# The default value is: NO.
 
 OPTIMIZE_OUTPUT_JAVA   = NO
 
 # Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
-# sources only. Doxygen will then generate output that is more tailored for
-# Fortran.
+# sources. Doxygen will then generate output that is tailored for Fortran.
+# The default value is: NO.
 
 OPTIMIZE_FOR_FORTRAN   = NO
 
 # Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
-# sources. Doxygen will then generate output that is tailored for
-# VHDL.
+# sources. Doxygen will then generate output that is tailored for VHDL.
+# The default value is: NO.
 
 OPTIMIZE_OUTPUT_VHDL   = NO
 
+# Set the OPTIMIZE_OUTPUT_SLICE tag to YES if your project consists of Slice
+# sources only. Doxygen will then generate output that is more tailored for that
+# language. For instance, namespaces will be presented as modules, types will be
+# separated into more groups, etc.
+# The default value is: NO.
+
+OPTIMIZE_OUTPUT_SLICE  = NO
+
 # Doxygen selects the parser to use depending on the extension of the files it
-# parses. With this tag you can assign which parser to use for a given extension.
-# Doxygen has a built-in mapping, but you can override or extend it using this
-# tag. The format is ext=language, where ext is a file extension, and language
-# is one of the parsers supported by doxygen: IDL, Java, Javascript, CSharp, C,
-# C++, D, PHP, Objective-C, Python, Fortran, VHDL, C, C++. For instance to make
-# doxygen treat .inc files as Fortran files (default is PHP), and .f files as C
-# (default is Fortran), use: inc=Fortran f=C. Note that for custom extensions
-# you also need to set FILE_PATTERNS otherwise the files are not read by doxygen.
+# parses. With this tag you can assign which parser to use for a given
+# extension. Doxygen has a built-in mapping, but you can override or extend it
+# using this tag. The format is ext=language, where ext is a file extension, and
+# language is one of the parsers supported by doxygen: IDL, Java, JavaScript,
+# Csharp (C#), C, C++, Lex, D, PHP, md (Markdown), Objective-C, Python, Slice,
+# VHDL, Fortran (fixed format Fortran: FortranFixed, free formatted Fortran:
+# FortranFree, unknown formatted Fortran: Fortran. In the later case the parser
+# tries to guess whether the code is fixed or free formatted code, this is the
+# default for Fortran type files). For instance to make doxygen treat .inc files
+# as Fortran files (default is PHP), and .f files as C (default is Fortran),
+# use: inc=Fortran f=C.
+#
+# Note: For files without extension you can use no_extension as a placeholder.
+#
+# Note that for custom extensions you also need to set FILE_PATTERNS otherwise
+# the files are not read by doxygen. When specifying no_extension you should add
+# * to the FILE_PATTERNS.
+#
+# Note see also the list of default file extension mappings.
 
 EXTENSION_MAPPING      =
 
+# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
+# according to the Markdown format, which allows for more readable
+# documentation. See https://daringfireball.net/projects/markdown/ for details.
+# The output of markdown processing is further processed by doxygen, so you can
+# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in
+# case of backward compatibilities issues.
+# The default value is: YES.
+
+MARKDOWN_SUPPORT       = YES
+
+# When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up
+# to that level are automatically included in the table of contents, even if
+# they do not have an id attribute.
+# Note: This feature currently applies only to Markdown headings.
+# Minimum value: 0, maximum value: 99, default value: 5.
+# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
+
+TOC_INCLUDE_HEADINGS   = 5
+
+# The MARKDOWN_ID_STYLE tag can be used to specify the algorithm used to
+# generate identifiers for the Markdown headings. Note: Every identifier is
+# unique.
+# Possible values are: DOXYGEN Use a fixed 'autotoc_md' string followed by a
+# sequence number starting at 0. and GITHUB Use the lower case version of title
+# with any whitespace replaced by '-' and punctations characters removed..
+# The default value is: DOXYGEN.
+# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
+
+MARKDOWN_ID_STYLE      = DOXYGEN
+
+# When enabled doxygen tries to link words that correspond to documented
+# classes, or namespaces to their corresponding documentation. Such a link can
+# be prevented in individual cases by putting a % sign in front of the word or
+# globally by setting AUTOLINK_SUPPORT to NO.
+# The default value is: YES.
+
+AUTOLINK_SUPPORT       = YES
+
 # If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
-# to include (a tag file for) the STL sources as input, then you should
-# set this tag to YES in order to let doxygen match functions declarations and
-# definitions whose arguments contain STL classes (e.g. func(std::string); v.s.
-# func(std::string) {}). This also make the inheritance and collaboration
+# to include (a tag file for) the STL sources as input, then you should set this
+# tag to YES in order to let doxygen match functions declarations and
+# definitions whose arguments contain STL classes (e.g. func(std::string);
+# versus func(std::string) {}). This also make the inheritance and collaboration
 # diagrams that involve STL classes more complete and accurate.
+# The default value is: NO.
 
 BUILTIN_STL_SUPPORT    = NO
 
 # If you use Microsoft's C++/CLI language, you should set this option to YES to
 # enable parsing support.
+# The default value is: NO.
 
 CPP_CLI_SUPPORT        = NO
 
-# Set the SIP_SUPPORT tag to YES if your project consists of sip sources only.
-# Doxygen will parse them like normal C++ but will assume all classes use public
-# instead of private inheritance when no explicit protection keyword is present.
+# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
+# https://www.riverbankcomputing.com/software/sip/intro) sources only. Doxygen
+# will parse them like normal C++ but will assume all classes use public instead
+# of private inheritance when no explicit protection keyword is present.
+# The default value is: NO.
 
 SIP_SUPPORT            = NO
 
-# For Microsoft's IDL there are propget and propput attributes to indicate getter
-# and setter methods for a property. Setting this option to YES (the default)
-# will make doxygen to replace the get and set methods by a property in the
-# documentation. This will only work if the methods are indeed getting or
-# setting a simple type. If this is not the case, or you want to show the
-# methods anyway, you should set this option to NO.
+# For Microsoft's IDL there are propget and propput attributes to indicate
+# getter and setter methods for a property. Setting this option to YES will make
+# doxygen to replace the get and set methods by a property in the documentation.
+# This will only work if the methods are indeed getting or setting a simple
+# type. If this is not the case, or you want to show the methods anyway, you
+# should set this option to NO.
+# The default value is: YES.
 
 IDL_PROPERTY_SUPPORT   = YES
 
 # If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
-# tag is set to YES, then doxygen will reuse the documentation of the first
+# tag is set to YES then doxygen will reuse the documentation of the first
 # member in the group (if any) for the other members of the group. By default
 # all members of a group must be documented explicitly.
+# The default value is: NO.
 
 DISTRIBUTE_GROUP_DOC   = NO
 
-# Set the SUBGROUPING tag to YES (the default) to allow class member groups of
-# the same type (for instance a group of public functions) to be put as a
-# subgroup of that type (e.g. under the Public Functions section). Set it to
-# NO to prevent subgrouping. Alternatively, this can be done per class using
-# the \nosubgrouping command.
+# If one adds a struct or class to a group and this option is enabled, then also
+# any nested class or struct is added to the same group. By default this option
+# is disabled and one has to add nested compounds explicitly via \ingroup.
+# The default value is: NO.
+
+GROUP_NESTED_COMPOUNDS = NO
+
+# Set the SUBGROUPING tag to YES to allow class member groups of the same type
+# (for instance a group of public functions) to be put as a subgroup of that
+# type (e.g. under the Public Functions section). Set it to NO to prevent
+# subgrouping. Alternatively, this can be done per class using the
+# \nosubgrouping command.
+# The default value is: YES.
 
 SUBGROUPING            = YES
 
-# When TYPEDEF_HIDES_STRUCT is enabled, a typedef of a struct, union, or enum
-# is documented as struct, union, or enum with the name of the typedef. So
+# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions
+# are shown inside the group in which they are included (e.g. using \ingroup)
+# instead of on a separate page (for HTML and Man pages) or section (for LaTeX
+# and RTF).
+#
+# Note that this feature does not work in combination with
+# SEPARATE_MEMBER_PAGES.
+# The default value is: NO.
+
+INLINE_GROUPED_CLASSES = NO
+
+# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions
+# with only public data fields or simple typedef fields will be shown inline in
+# the documentation of the scope in which they are defined (i.e. file,
+# namespace, or group documentation), provided this scope is documented. If set
+# to NO, structs, classes, and unions are shown on a separate page (for HTML and
+# Man pages) or section (for LaTeX and RTF).
+# The default value is: NO.
+
+INLINE_SIMPLE_STRUCTS  = NO
+
+# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
+# enum is documented as struct, union, or enum with the name of the typedef. So
 # typedef struct TypeS {} TypeT, will appear in the documentation as a struct
 # with name TypeT. When disabled the typedef will appear as a member of a file,
-# namespace, or class. And the struct will be named TypeS. This can typically
-# be useful for C code in case the coding convention dictates that all compound
+# namespace, or class. And the struct will be named TypeS. This can typically be
+# useful for C code in case the coding convention dictates that all compound
 # types are typedef'ed and only the typedef is referenced, never the tag name.
+# The default value is: NO.
 
 TYPEDEF_HIDES_STRUCT   = NO
 
-# The SYMBOL_CACHE_SIZE determines the size of the internal cache use to
-# determine which symbols to keep in memory and which to flush to disk.
-# When the cache is full, less often used symbols will be written to disk.
-# For small to medium size projects (<1000 input files) the default value is
-# probably good enough. For larger projects a too small cache size can cause
-# doxygen to be busy swapping symbols to and from disk most of the time
-# causing a significant performance penalty.
-# If the system has enough physical memory increasing the cache will improve the
-# performance by keeping more symbols in memory. Note that the value works on
-# a logarithmic scale so increasing the size by one will roughly double the
-# memory usage. The cache size is given by this formula:
-# 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0,
-# corresponding to a cache size of 2^16 = 65536 symbols
-
-#SYMBOL_CACHE_SIZE      = 0
+# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This
+# cache is used to resolve symbols given their name and scope. Since this can be
+# an expensive process and often the same symbol appears multiple times in the
+# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small
+# doxygen will become slower. If the cache is too large, memory is wasted. The
+# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range
+# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
+# symbols. At the end of a run doxygen will report the cache usage and suggest
+# the optimal cache size from a speed point of view.
+# Minimum value: 0, maximum value: 9, default value: 0.
+
+LOOKUP_CACHE_SIZE      = 0
+
+# The NUM_PROC_THREADS specifies the number of threads doxygen is allowed to use
+# during processing. When set to 0 doxygen will based this on the number of
+# cores available in the system. You can set it explicitly to a value larger
+# than 0 to get more control over the balance between CPU load and processing
+# speed. At this moment only the input processing can be done using multiple
+# threads. Since this is still an experimental feature the default is set to 1,
+# which effectively disables parallel processing. Please report any issues you
+# encounter. Generating dot graphs in parallel is controlled by the
+# DOT_NUM_THREADS setting.
+# Minimum value: 0, maximum value: 32, default value: 1.
+
+NUM_PROC_THREADS       = 1
+
+# If the TIMESTAMP tag is set different from NO then each generated page will
+# contain the date or date and time when the page was generated. Setting this to
+# NO can help when comparing the output of multiple runs.
+# Possible values are: YES, NO, DATETIME and DATE.
+# The default value is: NO.
+
+TIMESTAMP              = YES
 
 #---------------------------------------------------------------------------
 # Build related configuration options
 #---------------------------------------------------------------------------
 
-# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in
-# documentation are documented, even if no documentation was available.
-# Private class members and static file members will be hidden unless
-# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
+# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
+# documentation are documented, even if no documentation was available. Private
+# class members and static file members will be hidden unless the
+# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
+# Note: This will also disable the warnings about undocumented members that are
+# normally produced when WARNINGS is set to YES.
+# The default value is: NO.
 
 EXTRACT_ALL            = NO
 
-# If the EXTRACT_PRIVATE tag is set to YES all private members of a class
-# will be included in the documentation.
+# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
+# be included in the documentation.
+# The default value is: NO.
 
 EXTRACT_PRIVATE        = YES
 
-# If the EXTRACT_STATIC tag is set to YES all static members of a file
-# will be included in the documentation.
+# If the EXTRACT_PRIV_VIRTUAL tag is set to YES, documented private virtual
+# methods of a class will be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PRIV_VIRTUAL   = NO
+
+# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal
+# scope will be included in the documentation.
+# The default value is: NO.
+
+EXTRACT_PACKAGE        = NO
+
+# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
+# included in the documentation.
+# The default value is: NO.
 
 EXTRACT_STATIC         = YES
 
-# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs)
-# defined locally in source files will be included in the documentation.
-# If set to NO only classes defined in header files are included.
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
+# locally in source files will be included in the documentation. If set to NO,
+# only classes defined in header files are included. Does not have any effect
+# for Java sources.
+# The default value is: YES.
 
 EXTRACT_LOCAL_CLASSES  = YES
 
-# This flag is only useful for Objective-C code. When set to YES local
-# methods, which are defined in the implementation section but not in
-# the interface are included in the documentation.
-# If set to NO (the default) only methods in the interface are included.
+# This flag is only useful for Objective-C code. If set to YES, local methods,
+# which are defined in the implementation section but not in the interface are
+# included in the documentation. If set to NO, only methods in the interface are
+# included.
+# The default value is: NO.
 
 EXTRACT_LOCAL_METHODS  = YES
 
 # If this flag is set to YES, the members of anonymous namespaces will be
 # extracted and appear in the documentation as a namespace called
-# 'anonymous_namespace{file}', where file will be replaced with the base
-# name of the file that contains the anonymous namespace. By default
-# anonymous namespace are hidden.
+# 'anonymous_namespace{file}', where file will be replaced with the base name of
+# the file that contains the anonymous namespace. By default anonymous namespace
+# are hidden.
+# The default value is: NO.
 
 EXTRACT_ANON_NSPACES   = NO
 
-# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all
-# undocumented members of documented classes, files or namespaces.
-# If set to NO (the default) these members will be included in the
-# various overviews, but no documentation section is generated.
-# This option has no effect if EXTRACT_ALL is enabled.
+# If this flag is set to YES, the name of an unnamed parameter in a declaration
+# will be determined by the corresponding definition. By default unnamed
+# parameters remain unnamed in the output.
+# The default value is: YES.
+
+RESOLVE_UNNAMED_PARAMS = YES
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
+# undocumented members inside documented classes or files. If set to NO these
+# members will be included in the various overviews, but no documentation
+# section is generated. This option has no effect if EXTRACT_ALL is enabled.
+# The default value is: NO.
 
 HIDE_UNDOC_MEMBERS     = NO
 
-# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all
-# undocumented classes that are normally visible in the class hierarchy.
-# If set to NO (the default) these classes will be included in the various
-# overviews. This option has no effect if EXTRACT_ALL is enabled.
+# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
+# undocumented classes that are normally visible in the class hierarchy. If set
+# to NO, these classes will be included in the various overviews. This option
+# will also hide undocumented C++ concepts if enabled. This option has no effect
+# if EXTRACT_ALL is enabled.
+# The default value is: NO.
 
 HIDE_UNDOC_CLASSES     = NO
 
-# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all
-# friend (class|struct|union) declarations.
-# If set to NO (the default) these declarations will be included in the
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend
+# declarations. If set to NO, these declarations will be included in the
 # documentation.
+# The default value is: NO.
 
 HIDE_FRIEND_COMPOUNDS  = NO
 
-# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any
-# documentation blocks found inside the body of a function.
-# If set to NO (the default) these blocks will be appended to the
-# function's detailed documentation block.
+# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
+# documentation blocks found inside the body of a function. If set to NO, these
+# blocks will be appended to the function's detailed documentation block.
+# The default value is: NO.
 
 HIDE_IN_BODY_DOCS      = NO
 
-# The INTERNAL_DOCS tag determines if documentation
-# that is typed after a \internal command is included. If the tag is set
-# to NO (the default) then the documentation will be excluded.
-# Set it to YES to include the internal documentation.
+# The INTERNAL_DOCS tag determines if documentation that is typed after a
+# \internal command is included. If the tag is set to NO then the documentation
+# will be excluded. Set it to YES to include the internal documentation.
+# The default value is: NO.
 
 INTERNAL_DOCS          = NO
 
-# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate
-# file names in lower-case letters. If set to YES upper-case letters are also
-# allowed. This is useful if you have classes or files whose names only differ
-# in case and if your file system supports case sensitive file names. Windows
-# and Mac users are advised to set this option to NO.
+# With the correct setting of option CASE_SENSE_NAMES doxygen will better be
+# able to match the capabilities of the underlying filesystem. In case the
+# filesystem is case sensitive (i.e. it supports files in the same directory
+# whose names only differ in casing), the option must be set to YES to properly
+# deal with such files in case they appear in the input. For filesystems that
+# are not case sensitive the option should be set to NO to properly deal with
+# output files written for symbols that only differ in casing, such as for two
+# classes, one named CLASS and the other named Class, and to also support
+# references to files without having to specify the exact matching casing. On
+# Windows (including Cygwin) and MacOS, users should typically set this option
+# to NO, whereas on Linux or other Unix flavors it should typically be set to
+# YES.
+# Possible values are: SYSTEM, NO and YES.
+# The default value is: SYSTEM.
 
 CASE_SENSE_NAMES       = YES
 
-# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen
-# will show members with their full class and namespace scopes in the
-# documentation. If set to YES the scope will be hidden.
+# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with
+# their full class and namespace scopes in the documentation. If set to YES, the
+# scope will be hidden.
+# The default value is: NO.
 
 HIDE_SCOPE_NAMES       = NO
 
-# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen
-# will put a list of the files that are included by a file in the documentation
-# of that file.
+# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will
+# append additional text to a page's title, such as Class Reference. If set to
+# YES the compound reference will be hidden.
+# The default value is: NO.
+
+HIDE_COMPOUND_REFERENCE= NO
+
+# If the SHOW_HEADERFILE tag is set to YES then the documentation for a class
+# will show which file needs to be included to use the class.
+# The default value is: YES.
+
+SHOW_HEADERFILE        = YES
+
+# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
+# the files that are included by a file in the documentation of that file.
+# The default value is: YES.
 
 SHOW_INCLUDE_FILES     = YES
 
-# If the FORCE_LOCAL_INCLUDES tag is set to YES then Doxygen
-# will list include files with double quotes in the documentation
-# rather than with sharp brackets.
+# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each
+# grouped member an include statement to the documentation, telling the reader
+# which file to include in order to use the member.
+# The default value is: NO.
+
+SHOW_GROUPED_MEMB_INC  = NO
+
+# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include
+# files with double quotes in the documentation rather than with sharp brackets.
+# The default value is: NO.
 
 FORCE_LOCAL_INCLUDES   = NO
 
-# If the INLINE_INFO tag is set to YES (the default) then a tag [inline]
-# is inserted in the documentation for inline members.
+# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the
+# documentation for inline members.
+# The default value is: YES.
 
 INLINE_INFO            = YES
 
-# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen
-# will sort the (detailed) documentation of file and class members
-# alphabetically by member name. If set to NO the members will appear in
-# declaration order.
+# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
+# (detailed) documentation of file and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order.
+# The default value is: YES.
 
 SORT_MEMBER_DOCS       = NO
 
-# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the
-# brief documentation of file, namespace and class members alphabetically
-# by member name. If set to NO (the default) the members will appear in
-# declaration order.
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
+# descriptions of file, namespace and class members alphabetically by member
+# name. If set to NO, the members will appear in declaration order. Note that
+# this will also influence the order of the classes in the class list.
+# The default value is: NO.
 
 SORT_BRIEF_DOCS        = NO
 
-# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen
-# will sort the (brief and detailed) documentation of class members so that
-# constructors and destructors are listed first. If set to NO (the default)
-# the constructors will appear in the respective orders defined by
-# SORT_MEMBER_DOCS and SORT_BRIEF_DOCS.
-# This tag will be ignored for brief docs if SORT_BRIEF_DOCS is set to NO
-# and ignored for detailed docs if SORT_MEMBER_DOCS is set to NO.
+# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
+# (brief and detailed) documentation of class members so that constructors and
+# destructors are listed first. If set to NO the constructors will appear in the
+# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
+# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief
+# member documentation.
+# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
+# detailed member documentation.
+# The default value is: NO.
 
 SORT_MEMBERS_CTORS_1ST = NO
 
-# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the
-# hierarchy of group names into alphabetical order. If set to NO (the default)
-# the group names will appear in their defined order.
+# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
+# of group names into alphabetical order. If set to NO the group names will
+# appear in their defined order.
+# The default value is: NO.
 
 SORT_GROUP_NAMES       = NO
 
-# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be
-# sorted by fully-qualified names, including namespaces. If set to
-# NO (the default), the class list will be sorted only by class name,
-# not including the namespace part.
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
+# fully-qualified names, including namespaces. If set to NO, the class list will
+# be sorted only by class name, not including the namespace part.
 # Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
-# Note: This option applies only to the class list, not to the
-# alphabetical list.
+# Note: This option applies only to the class list, not to the alphabetical
+# list.
+# The default value is: NO.
 
 SORT_BY_SCOPE_NAME     = NO
 
-# The GENERATE_TODOLIST tag can be used to enable (YES) or
-# disable (NO) the todo list. This list is created by putting \todo
-# commands in the documentation.
+# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper
+# type resolution of all parameters of a function it will reject a match between
+# the prototype and the implementation of a member function even if there is
+# only one candidate or it is obvious which candidate to choose by doing a
+# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
+# accept a match between prototype and implementation in such cases.
+# The default value is: NO.
+
+STRICT_PROTO_MATCHING  = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo
+# list. This list is created by putting \todo commands in the documentation.
+# The default value is: YES.
 
 GENERATE_TODOLIST      = YES
 
-# The GENERATE_TESTLIST tag can be used to enable (YES) or
-# disable (NO) the test list. This list is created by putting \test
-# commands in the documentation.
+# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test
+# list. This list is created by putting \test commands in the documentation.
+# The default value is: YES.
 
 GENERATE_TESTLIST      = YES
 
-# The GENERATE_BUGLIST tag can be used to enable (YES) or
-# disable (NO) the bug list. This list is created by putting \bug
-# commands in the documentation.
+# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug
+# list. This list is created by putting \bug commands in the documentation.
+# The default value is: YES.
 
 GENERATE_BUGLIST       = YES
 
-# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or
-# disable (NO) the deprecated list. This list is created by putting
-# \deprecated commands in the documentation.
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO)
+# the deprecated list. This list is created by putting \deprecated commands in
+# the documentation.
+# The default value is: YES.
 
 GENERATE_DEPRECATEDLIST= YES
 
-# The ENABLED_SECTIONS tag can be used to enable conditional
-# documentation sections, marked by \if sectionname ... \endif.
+# The ENABLED_SECTIONS tag can be used to enable conditional documentation
+# sections, marked by \if <section_label> ... \endif and \cond <section_label>
+# ... \endcond blocks.
 
 ENABLED_SECTIONS       =
 
-# The MAX_INITIALIZER_LINES tag determines the maximum number of lines
-# the initial value of a variable or define consists of for it to appear in
-# the documentation. If the initializer consists of more lines than specified
-# here it will be hidden. Use a value of 0 to hide initializers completely.
-# The appearance of the initializer of individual variables and defines in the
-# documentation can be controlled using \showinitializer or \hideinitializer
-# command in the documentation regardless of this setting.
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
+# initial value of a variable or macro / define can have for it to appear in the
+# documentation. If the initializer consists of more lines than specified here
+# it will be hidden. Use a value of 0 to hide initializers completely. The
+# appearance of the value of individual variables and macros / defines can be
+# controlled using \showinitializer or \hideinitializer command in the
+# documentation regardless of this setting.
+# Minimum value: 0, maximum value: 10000, default value: 30.
 
 MAX_INITIALIZER_LINES  = 30
 
-# Set the SHOW_USED_FILES tag to NO to disable the list of files generated
-# at the bottom of the documentation of classes and structs. If set to YES the
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at
+# the bottom of the documentation of classes and structs. If set to YES, the
 # list will mention the files that were used to generate the documentation.
+# The default value is: YES.
 
 SHOW_USED_FILES        = YES
 
-# If the sources in your project are distributed over multiple directories
-# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy
-# in the documentation. The default is NO.
-
-#SHOW_DIRECTORIES       = YES
-
-# Set the SHOW_FILES tag to NO to disable the generation of the Files page.
-# This will remove the Files entry from the Quick Index and from the
-# Folder Tree View (if specified). The default is YES.
+# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This
+# will remove the Files entry from the Quick Index and from the Folder Tree View
+# (if specified).
+# The default value is: YES.
 
 SHOW_FILES             = YES
 
-# Set the SHOW_NAMESPACES tag to NO to disable the generation of the
-# Namespaces page.
-# This will remove the Namespaces entry from the Quick Index
-# and from the Folder Tree View (if specified). The default is YES.
+# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces
+# page. This will remove the Namespaces entry from the Quick Index and from the
+# Folder Tree View (if specified).
+# The default value is: YES.
 
 SHOW_NAMESPACES        = YES
 
 # The FILE_VERSION_FILTER tag can be used to specify a program or script that
 # doxygen should invoke to get the current version for each file (typically from
 # the version control system). Doxygen will invoke the program by executing (via
-# popen()) the command <command> <input-file>, where <command> is the value of
-# the FILE_VERSION_FILTER tag, and <input-file> is the name of an input file
-# provided by doxygen. Whatever the program writes to standard output
-# is used as the file version. See the manual for examples.
+# popen()) the command command input-file, where command is the value of the
+# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided
+# by doxygen. Whatever the program writes to standard output is used as the file
+# version. For an example see the documentation.
 
 FILE_VERSION_FILTER    =
 
 # The LAYOUT_FILE tag can be used to specify a layout file which will be parsed
 # by doxygen. The layout file controls the global structure of the generated
-# output files in an output format independent way. The create the layout file
-# that represents doxygen's defaults, run doxygen with the -l option.
-# You can optionally specify a file name after the option, if omitted
-# DoxygenLayout.xml will be used as the name of the layout file.
+# output files in an output format independent way. To create the layout file
+# that represents doxygen's defaults, run doxygen with the -l option. You can
+# optionally specify a file name after the option, if omitted DoxygenLayout.xml
+# will be used as the name of the layout file. See also section "Changing the
+# layout of pages" for information.
+#
+# Note that if you run doxygen from a directory containing a file called
+# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE
+# tag is left empty.
 
 LAYOUT_FILE            =
 
+# The CITE_BIB_FILES tag can be used to specify one or more bib files containing
+# the reference definitions. This must be a list of .bib files. The .bib
+# extension is automatically appended if omitted. This requires the bibtex tool
+# to be installed. See also https://en.wikipedia.org/wiki/BibTeX for more info.
+# For LaTeX the style of the bibliography can be controlled using
+# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
+# search path. See also \cite for info how to create references.
+
+CITE_BIB_FILES         =
+
 #---------------------------------------------------------------------------
-# configuration options related to warning and progress messages
+# Configuration options related to warning and progress messages
 #---------------------------------------------------------------------------
 
-# The QUIET tag can be used to turn on/off the messages that are generated
-# by doxygen. Possible values are YES and NO. If left blank NO is used.
+# The QUIET tag can be used to turn on/off the messages that are generated to
+# standard output by doxygen. If QUIET is set to YES this implies that the
+# messages are off.
+# The default value is: NO.
 
 QUIET                  = YES
 
 # The WARNINGS tag can be used to turn on/off the warning messages that are
-# generated by doxygen. Possible values are YES and NO. If left blank
-# NO is used.
+# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
+# this implies that the warnings are on.
+#
+# Tip: Turn warnings on while writing the documentation.
+# The default value is: YES.
 
 WARNINGS               = YES
 
-# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings
-# for undocumented members. If EXTRACT_ALL is set to YES then this flag will
-# automatically be disabled.
+# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
+# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag
+# will automatically be disabled.
+# The default value is: YES.
 
 WARN_IF_UNDOCUMENTED   = NO
 
-# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for
-# potential errors in the documentation, such as not documenting some
-# parameters in a documented function, or documenting parameters that
-# don't exist or using markup commands wrongly.
+# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
+# potential errors in the documentation, such as documenting some parameters in
+# a documented function twice, or documenting parameters that don't exist or
+# using markup commands wrongly.
+# The default value is: YES.
 
 WARN_IF_DOC_ERROR      = YES
 
-# This WARN_NO_PARAMDOC option can be abled to get warnings for
-# functions that are documented, but have no documentation for their parameters
-# or return value. If set to NO (the default) doxygen will only warn about
-# wrong or incomplete parameter documentation, but not about the absence of
-# documentation.
+# If WARN_IF_INCOMPLETE_DOC is set to YES, doxygen will warn about incomplete
+# function parameter documentation. If set to NO, doxygen will accept that some
+# parameters have no documentation without warning.
+# The default value is: YES.
+
+WARN_IF_INCOMPLETE_DOC = YES
+
+# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
+# are documented, but have no documentation for their parameters or return
+# value. If set to NO, doxygen will only warn about wrong parameter
+# documentation, but not about the absence of documentation. If EXTRACT_ALL is
+# set to YES then this flag will automatically be disabled. See also
+# WARN_IF_INCOMPLETE_DOC
+# The default value is: NO.
 
 WARN_NO_PARAMDOC       = YES
 
-# The WARN_FORMAT tag determines the format of the warning messages that
-# doxygen can produce. The string should contain the $file, $line, and $text
-# tags, which will be replaced by the file and line number from which the
-# warning originated and the warning text. Optionally the format may contain
-# $version, which will be replaced by the version of the file (if it could
-# be obtained via FILE_VERSION_FILTER)
+# If WARN_IF_UNDOC_ENUM_VAL option is set to YES, doxygen will warn about
+# undocumented enumeration values. If set to NO, doxygen will accept
+# undocumented enumeration values. If EXTRACT_ALL is set to YES then this flag
+# will automatically be disabled.
+# The default value is: NO.
+
+WARN_IF_UNDOC_ENUM_VAL = NO
+
+# If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when
+# a warning is encountered. If the WARN_AS_ERROR tag is set to FAIL_ON_WARNINGS
+# then doxygen will continue running as if WARN_AS_ERROR tag is set to NO, but
+# at the end of the doxygen process doxygen will return with a non-zero status.
+# If the WARN_AS_ERROR tag is set to FAIL_ON_WARNINGS_PRINT then doxygen behaves
+# like FAIL_ON_WARNINGS but in case no WARN_LOGFILE is defined doxygen will not
+# write the warning messages in between other messages but write them at the end
+# of a run, in case a WARN_LOGFILE is defined the warning messages will be
+# besides being in the defined file also be shown at the end of a run, unless
+# the WARN_LOGFILE is defined as - i.e. standard output (stdout) in that case
+# the behavior will remain as with the setting FAIL_ON_WARNINGS.
+# Possible values are: NO, YES, FAIL_ON_WARNINGS and FAIL_ON_WARNINGS_PRINT.
+# The default value is: NO.
+
+WARN_AS_ERROR          = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that doxygen
+# can produce. The string should contain the $file, $line, and $text tags, which
+# will be replaced by the file and line number from which the warning originated
+# and the warning text. Optionally the format may contain $version, which will
+# be replaced by the version of the file (if it could be obtained via
+# FILE_VERSION_FILTER)
+# See also: WARN_LINE_FORMAT
+# The default value is: $file:$line: $text.
 
 WARN_FORMAT            = "$file:$line: $text"
 
-# The WARN_LOGFILE tag can be used to specify a file to which warning
-# and error messages should be written. If left blank the output is written
-# to stderr.
+# In the $text part of the WARN_FORMAT command it is possible that a reference
+# to a more specific place is given. To make it easier to jump to this place
+# (outside of doxygen) the user can define a custom "cut" / "paste" string.
+# Example:
+# WARN_LINE_FORMAT = "'vi $file +$line'"
+# See also: WARN_FORMAT
+# The default value is: at line $line of file $file.
+
+WARN_LINE_FORMAT       = "at line $line of file $file"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning and error
+# messages should be written. If left blank the output is written to standard
+# error (stderr). In case the file specified cannot be opened for writing the
+# warning and error messages are written to standard error. When as file - is
+# specified the warning and error messages are written to standard output
+# (stdout).
 
 WARN_LOGFILE           =
 
 #---------------------------------------------------------------------------
-# configuration options related to the input files
+# Configuration options related to the input files
 #---------------------------------------------------------------------------
 
-# The INPUT tag can be used to specify the files and/or directories that contain
-# documented source files. You may enter file names like "myfile.cpp" or
-# directories like "/usr/src/myproject". Separate the files or directories
-# with spaces.
+# The INPUT tag is used to specify the files and/or directories that contain
+# documented source files. You may enter file names like myfile.cpp or
+# directories like /usr/src/myproject. Separate the files or directories with
+# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
+# Note: If this tag is empty the current directory is searched.
 
 INPUT                  = .
 
 # This tag can be used to specify the character encoding of the source files
-# that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
-# also the default input encoding. Doxygen uses libiconv (or the iconv built
-# into libc) for the transcoding. See http://www.gnu.org/software/libiconv for
-# the list of possible encodings.
+# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
+# libiconv (or the iconv built into libc) for the transcoding. See the libiconv
+# documentation (see:
+# https://www.gnu.org/software/libiconv/) for the list of possible encodings.
+# See also: INPUT_FILE_ENCODING
+# The default value is: UTF-8.
 
 INPUT_ENCODING         = UTF-8
 
+# This tag can be used to specify the character encoding of the source files
+# that doxygen parses The INPUT_FILE_ENCODING tag can be used to specify
+# character encoding on a per file pattern basis. Doxygen will compare the file
+# name with each pattern and apply the encoding instead of the default
+# INPUT_ENCODING) if there is a match. The character encodings are a list of the
+# form: pattern=encoding (like *.php=ISO-8859-1). See cfg_input_encoding
+# "INPUT_ENCODING" for further information on supported encodings.
+
+INPUT_FILE_ENCODING    =
+
 # If the value of the INPUT tag contains directories, you can use the
-# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
-# and *.h) to filter out the source-files in the directories. If left
-# blank the following patterns are tested:
-# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx
-# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm *.py *.f90
+# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
+# *.h) to filter out the source-files in the directories.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# read by doxygen.
+#
+# Note the list of default checked file patterns might differ from the list of
+# default file extension mappings.
+#
+# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp,
+# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h,
+# *.hh, *.hxx, *.hpp, *.h++, *.l, *.cs, *.d, *.php, *.php4, *.php5, *.phtml,
+# *.inc, *.m, *.markdown, *.md, *.mm, *.dox (to be provided as doxygen C
+# comment), *.py, *.pyw, *.f90, *.f95, *.f03, *.f08, *.f18, *.f, *.for, *.vhd,
+# *.vhdl, *.ucf, *.qsf and *.ice.
 
 FILE_PATTERNS          =
 
-# The RECURSIVE tag can be used to turn specify whether or not subdirectories
-# should be searched for input files as well. Possible values are YES and NO.
-# If left blank NO is used.
+# The RECURSIVE tag can be used to specify whether or not subdirectories should
+# be searched for input files as well.
+# The default value is: NO.
 
 RECURSIVE              = YES
 
-# The EXCLUDE tag can be used to specify files and/or directories that should
+# The EXCLUDE tag can be used to specify files and/or directories that should be
 # excluded from the INPUT source files. This way you can easily exclude a
 # subdirectory from a directory tree whose root is specified with the INPUT tag.
+#
+# Note that relative paths are relative to the directory from which doxygen is
+# run.
 
 EXCLUDE                = ./build \
                          ./compat \
-			 ./contrib \
+                         ./contrib \
                          util/configparser.c \
                          util/configparser.h \
                          util/configlexer.c \
@@ -623,27 +1001,29 @@ EXCLUDE                = ./build \
                          pythonmod/interface.h \
                          pythonmod/ubmodule-msg.py \
                          pythonmod/ubmodule-tst.py \
-			 unboundmodule.py \
+                         unboundmodule.py \
                          libunbound/python/unbound.py \
                          libunbound/python/libunbound_wrap.c \
                          libunbound/python/doc \
                          libunbound/python/examples \
                          ./ldns-src \
-			 README.md \
-			 doc/control_proto_spec.txt \
-			 doc/requirements.txt
+                         README.md \
+                         doc/control_proto_spec.txt \
+                         doc/requirements.txt
 
-# The EXCLUDE_SYMLINKS tag can be used select whether or not files or
-# directories that are symbolic links (a Unix filesystem feature) are excluded
+# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
+# directories that are symbolic links (a Unix file system feature) are excluded
 # from the input.
+# The default value is: NO.
 
 EXCLUDE_SYMLINKS       = NO
 
 # If the value of the INPUT tag contains directories, you can use the
 # EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
-# certain files from those directories. Note that the wildcards are matched
-# against the file with absolute path, so to exclude all test directories
-# for example use the pattern */test/*
+# certain files from those directories.
+#
+# Note that the wildcards are matched against the file with absolute path, so to
+# exclude all test directories for example use the pattern */test/*
 
 EXCLUDE_PATTERNS       =
 
@@ -651,694 +1031,1273 @@ EXCLUDE_PATTERNS       =
 # (namespaces, classes, functions, etc.) that should be excluded from the
 # output. The symbol name can be a fully qualified name, a word, or if the
 # wildcard * is used, a substring. Examples: ANamespace, AClass,
-# AClass::ANamespace, ANamespace::*Test
+# ANamespace::AClass, ANamespace::*Test
 
 EXCLUDE_SYMBOLS        =
 
-# The EXAMPLE_PATH tag can be used to specify one or more files or
-# directories that contain example code fragments that are included (see
-# the \include command).
+# The EXAMPLE_PATH tag can be used to specify one or more files or directories
+# that contain example code fragments that are included (see the \include
+# command).
 
 EXAMPLE_PATH           =
 
 # If the value of the EXAMPLE_PATH tag contains directories, you can use the
-# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
-# and *.h) to filter out the source-files in the directories. If left
-# blank all files are included.
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
+# *.h) to filter out the source-files in the directories. If left blank all
+# files are included.
 
 EXAMPLE_PATTERNS       =
 
 # If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
-# searched for input files to be used with the \include or \dontinclude
-# commands irrespective of the value of the RECURSIVE tag.
-# Possible values are YES and NO. If left blank NO is used.
+# searched for input files to be used with the \include or \dontinclude commands
+# irrespective of the value of the RECURSIVE tag.
+# The default value is: NO.
 
 EXAMPLE_RECURSIVE      = NO
 
-# The IMAGE_PATH tag can be used to specify one or more files or
-# directories that contain image that are included in the documentation (see
-# the \image command).
+# The IMAGE_PATH tag can be used to specify one or more files or directories
+# that contain images that are to be included in the documentation (see the
+# \image command).
 
 IMAGE_PATH             =
 
 # The INPUT_FILTER tag can be used to specify a program that doxygen should
 # invoke to filter for each input file. Doxygen will invoke the filter program
-# by executing (via popen()) the command <filter> <input-file>, where <filter>
-# is the value of the INPUT_FILTER tag, and <input-file> is the name of an
-# input file. Doxygen will then use the output that the filter program writes
-# to standard output.
-# If FILTER_PATTERNS is specified, this tag will be
-# ignored.
+# by executing (via popen()) the command:
+#
+# <filter> <input-file>
+#
+# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the
+# name of an input file. Doxygen will then use the output that the filter
+# program writes to standard output. If FILTER_PATTERNS is specified, this tag
+# will be ignored.
+#
+# Note that the filter must not add or remove lines; it is applied before the
+# code is scanned, but not when the output code is generated. If lines are added
+# or removed, the anchors will not be placed correctly.
+#
+# Note that doxygen will use the data processed and written to standard output
+# for further processing, therefore nothing else, like debug statements or used
+# commands (so in case of a Windows batch file always use @echo OFF), should be
+# written to standard output.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# properly processed by doxygen.
 
 INPUT_FILTER           =
 
 # The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
-# basis.
-# Doxygen will compare the file name with each pattern and apply the
-# filter if there is a match.
-# The filters are a list of the form:
-# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further
-# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER
-# is applied to all files.
+# basis. Doxygen will compare the file name with each pattern and apply the
+# filter if there is a match. The filters are a list of the form: pattern=filter
+# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how
+# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
+# patterns match the file name, INPUT_FILTER is applied.
+#
+# Note that for custom extensions or not directly supported extensions you also
+# need to set EXTENSION_MAPPING for the extension otherwise the files are not
+# properly processed by doxygen.
 
 FILTER_PATTERNS        =
 
 # If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
-# INPUT_FILTER) will be used to filter the input files when producing source
-# files to browse (i.e. when SOURCE_BROWSER is set to YES).
+# INPUT_FILTER) will also be used to filter the input files that are used for
+# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES).
+# The default value is: NO.
 
 FILTER_SOURCE_FILES    = NO
 
+# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file
+# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and
+# it is also possible to disable source filtering for a specific pattern using
+# *.ext= (so without naming a filter).
+# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
+
+FILTER_SOURCE_PATTERNS =
+
+# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that
+# is part of the input, its contents will be placed on the main page
+# (index.html). This can be useful if you have a project on for instance GitHub
+# and want to reuse the introduction page also for the doxygen output.
+
+USE_MDFILE_AS_MAINPAGE =
+
+# The Fortran standard specifies that for fixed formatted Fortran code all
+# characters from position 72 are to be considered as comment. A common
+# extension is to allow longer lines before the automatic comment starts. The
+# setting FORTRAN_COMMENT_AFTER will also make it possible that longer lines can
+# be processed before the automatic comment starts.
+# Minimum value: 7, maximum value: 10000, default value: 72.
+
+FORTRAN_COMMENT_AFTER  = 72
+
 #---------------------------------------------------------------------------
-# configuration options related to source browsing
+# Configuration options related to source browsing
 #---------------------------------------------------------------------------
 
-# If the SOURCE_BROWSER tag is set to YES then a list of source files will
-# be generated. Documented entities will be cross-referenced with these sources.
-# Note: To get rid of all source code in the generated output, make sure also
-# VERBATIM_HEADERS is set to NO.
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will be
+# generated. Documented entities will be cross-referenced with these sources.
+#
+# Note: To get rid of all source code in the generated output, make sure that
+# also VERBATIM_HEADERS is set to NO.
+# The default value is: NO.
 
 SOURCE_BROWSER         = NO
 
-# Setting the INLINE_SOURCES tag to YES will include the body
-# of functions and classes directly in the documentation.
+# Setting the INLINE_SOURCES tag to YES will include the body of functions,
+# classes and enums directly into the documentation.
+# The default value is: NO.
 
 INLINE_SOURCES         = NO
 
-# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct
-# doxygen to hide any special comment blocks from generated source code
-# fragments. Normal C and C++ comments will always remain visible.
+# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any
+# special comment blocks from generated source code fragments. Normal C, C++ and
+# Fortran comments will always remain visible.
+# The default value is: YES.
 
 STRIP_CODE_COMMENTS    = YES
 
-# If the REFERENCED_BY_RELATION tag is set to YES
-# then for each documented function all documented
-# functions referencing it will be listed.
+# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
+# entity all documented functions referencing it will be listed.
+# The default value is: NO.
 
 REFERENCED_BY_RELATION = YES
 
-# If the REFERENCES_RELATION tag is set to YES
-# then for each documented function all documented entities
-# called/used by that function will be listed.
+# If the REFERENCES_RELATION tag is set to YES then for each documented function
+# all documented entities called/used by that function will be listed.
+# The default value is: NO.
 
 REFERENCES_RELATION    = YES
 
-# If the REFERENCES_LINK_SOURCE tag is set to YES (the default)
-# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from
-# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will
-# link to the source code.
-# Otherwise they will link to the documentation.
+# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set
+# to YES then the hyperlinks from functions in REFERENCES_RELATION and
+# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will
+# link to the documentation.
+# The default value is: YES.
 
 REFERENCES_LINK_SOURCE = YES
 
-# If the USE_HTAGS tag is set to YES then the references to source code
-# will point to the HTML generated by the htags(1) tool instead of doxygen
-# built-in source browser. The htags tool is part of GNU's global source
-# tagging system (see http://www.gnu.org/software/global/global.html). You
-# will need version 4.8.6 or higher.
+# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the
+# source code will show a tooltip with additional information such as prototype,
+# brief description and links to the definition and documentation. Since this
+# will make the HTML file larger and loading of large files a bit slower, you
+# can opt to disable this feature.
+# The default value is: YES.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
+
+SOURCE_TOOLTIPS        = YES
+
+# If the USE_HTAGS tag is set to YES then the references to source code will
+# point to the HTML generated by the htags(1) tool instead of doxygen built-in
+# source browser. The htags tool is part of GNU's global source tagging system
+# (see https://www.gnu.org/software/global/global.html). You will need version
+# 4.8.6 or higher.
+#
+# To use it do the following:
+# - Install the latest version of global
+# - Enable SOURCE_BROWSER and USE_HTAGS in the configuration file
+# - Make sure the INPUT points to the root of the source tree
+# - Run doxygen as normal
+#
+# Doxygen will invoke htags (and that will in turn invoke gtags), so these
+# tools must be available from the command line (i.e. in the search path).
+#
+# The result: instead of the source browser generated by doxygen, the links to
+# source code will now point to the output of htags.
+# The default value is: NO.
+# This tag requires that the tag SOURCE_BROWSER is set to YES.
 
 USE_HTAGS              = NO
 
-# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen
-# will generate a verbatim copy of the header file for each class for
-# which an include is specified. Set to NO to disable this.
+# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
+# verbatim copy of the header file for each class for which an include is
+# specified. Set to NO to disable this.
+# See also: Section \class.
+# The default value is: YES.
 
 VERBATIM_HEADERS       = NO
 
+# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the
+# clang parser (see:
+# http://clang.llvm.org/) for more accurate parsing at the cost of reduced
+# performance. This can be particularly helpful with template rich C++ code for
+# which doxygen's built-in parser lacks the necessary type information.
+# Note: The availability of this option depends on whether or not doxygen was
+# generated with the -Duse_libclang=ON option for CMake.
+# The default value is: NO.
+
+CLANG_ASSISTED_PARSING = NO
+
+# If the CLANG_ASSISTED_PARSING tag is set to YES and the CLANG_ADD_INC_PATHS
+# tag is set to YES then doxygen will add the directory of each input to the
+# include path.
+# The default value is: YES.
+# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
+
+CLANG_ADD_INC_PATHS    = YES
+
+# If clang assisted parsing is enabled you can provide the compiler with command
+# line options that you would normally use when invoking the compiler. Note that
+# the include paths will already be set by doxygen for the files and directories
+# specified with INPUT and INCLUDE_PATH.
+# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
+
+CLANG_OPTIONS          =
+
+# If clang assisted parsing is enabled you can provide the clang parser with the
+# path to the directory containing a file called compile_commands.json. This
+# file is the compilation database (see:
+# http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html) containing the
+# options used when the source files were built. This is equivalent to
+# specifying the -p option to a clang tool, such as clang-check. These options
+# will then be passed to the parser. Any options specified with CLANG_OPTIONS
+# will be added as well.
+# Note: The availability of this option depends on whether or not doxygen was
+# generated with the -Duse_libclang=ON option for CMake.
+
+CLANG_DATABASE_PATH    =
+
 #---------------------------------------------------------------------------
-# configuration options related to the alphabetical class index
+# Configuration options related to the alphabetical class index
 #---------------------------------------------------------------------------
 
-# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index
-# of all compounds will be generated. Enable this if the project
-# contains a lot of classes, structs, unions or interfaces.
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
+# compounds will be generated. Enable this if the project contains a lot of
+# classes, structs, unions or interfaces.
+# The default value is: YES.
 
 ALPHABETICAL_INDEX     = YES
 
-# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then
-# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns
-# in which this list will be split (can be a number in the range [1..20])
-
-#COLS_IN_ALPHA_INDEX    = 5
-
-# In case all classes in a project start with a common prefix, all
-# classes will be put under the same header in the alphabetical index.
-# The IGNORE_PREFIX tag can be used to specify one or more prefixes that
-# should be ignored while generating the index headers.
+# The IGNORE_PREFIX tag can be used to specify a prefix (or a list of prefixes)
+# that should be ignored while generating the index headers. The IGNORE_PREFIX
+# tag works for classes, function and member names. The entity will be placed in
+# the alphabetical list under the first letter of the entity name that remains
+# after removing the prefix.
+# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
 
 IGNORE_PREFIX          =
 
 #---------------------------------------------------------------------------
-# configuration options related to the HTML output
+# Configuration options related to the HTML output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_HTML tag is set to YES (the default) Doxygen will
-# generate HTML output.
+# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
+# The default value is: YES.
 
 GENERATE_HTML          = YES
 
-# The HTML_OUTPUT tag is used to specify where the HTML docs will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be
-# put in front of it. If left blank `html' will be used as the default path.
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_OUTPUT            = html
 
-# The HTML_FILE_EXTENSION tag can be used to specify the file extension for
-# each generated HTML page (for example: .htm,.php,.asp). If it is left blank
-# doxygen will generate files with .html extension.
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
+# generated HTML page (for example: .htm, .php, .asp).
+# The default value is: .html.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_FILE_EXTENSION    = .html
 
-# The HTML_HEADER tag can be used to specify a personal HTML header for
-# each generated HTML page. If it is left blank doxygen will generate a
+# The HTML_HEADER tag can be used to specify a user-defined HTML header file for
+# each generated HTML page. If the tag is left blank doxygen will generate a
 # standard header.
+#
+# To get valid HTML the header file that includes any scripts and style sheets
+# that doxygen needs, which is dependent on the configuration options used (e.g.
+# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
+# default header using
+# doxygen -w html new_header.html new_footer.html new_stylesheet.css
+# YourConfigFile
+# and then modify the file new_header.html. See also section "Doxygen usage"
+# for information on how to generate the default header that doxygen normally
+# uses.
+# Note: The header is subject to change so you typically have to regenerate the
+# default header when upgrading to a newer version of doxygen. For a description
+# of the possible markers and block names see the documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_HEADER            =
 
-# The HTML_FOOTER tag can be used to specify a personal HTML footer for
-# each generated HTML page. If it is left blank doxygen will generate a
-# standard footer.
+# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
+# generated HTML page. If the tag is left blank doxygen will generate a standard
+# footer. See HTML_HEADER for more information on how to generate a default
+# footer and what special commands can be used inside the footer. See also
+# section "Doxygen usage" for information on how to generate the default footer
+# that doxygen normally uses.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_FOOTER            =
 
-# If the HTML_TIMESTAMP tag is set to YES then the generated HTML
-# documentation will contain the timesstamp.
-
-HTML_TIMESTAMP         = NO
-
-# The HTML_STYLESHEET tag can be used to specify a user-defined cascading
-# style sheet that is used by each HTML page. It can be used to
-# fine-tune the look of the HTML output. If the tag is left blank doxygen
-# will generate a default style sheet. Note that doxygen will try to copy
-# the style sheet file to the HTML output directory, so don't put your own
-# stylesheet in the HTML output directory as well, or it will be erased!
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
+# sheet that is used by each HTML page. It can be used to fine-tune the look of
+# the HTML output. If left blank doxygen will generate a default style sheet.
+# See also section "Doxygen usage" for information on how to generate the style
+# sheet that doxygen normally uses.
+# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as
+# it is more robust and this tag (HTML_STYLESHEET) will in the future become
+# obsolete.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_STYLESHEET        =
 
-# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output.
-# Doxygen will adjust the colors in the stylesheet and background images
-# according to this color. Hue is specified as an angle on a colorwheel,
-# see http://en.wikipedia.org/wiki/Hue for more information.
-# For instance the value 0 represents red, 60 is yellow, 120 is green,
-# 180 is cyan, 240 is blue, 300 purple, and 360 is red again.
-# The allowed range is 0 to 359.
-
-#HTML_COLORSTYLE_HUE    = 220
-
-# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of
-# the colors in the HTML output. For a value of 0 the output will use
-# grayscales only. A value of 255 will produce the most vivid colors.
-
-#HTML_COLORSTYLE_SAT    = 100
-
-# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to
-# the luminance component of the colors in the HTML output. Values below
-# 100 gradually make the output lighter, whereas values above 100 make
-# the output darker. The value divided by 100 is the actual gamma applied,
-# so 80 represents a gamma of 0.8, The value 220 represents a gamma of 2.2,
-# and 100 does not change the gamma.
-
-#HTML_COLORSTYLE_GAMMA  = 80
-
-# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
-# page will contain the date and time when the page was generated. Setting
-# this to NO can help when comparing the output of multiple runs.
-
-HTML_TIMESTAMP         = YES
-
-# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes,
-# files or namespaces will be aligned in HTML using tables. If set to
-# NO a bullet list will be used.
-
-#HTML_ALIGN_MEMBERS     = YES
+# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# cascading style sheets that are included after the standard style sheets
+# created by doxygen. Using this option one can overrule certain style aspects.
+# This is preferred over using HTML_STYLESHEET since it does not replace the
+# standard style sheet and is therefore more robust against future updates.
+# Doxygen will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list).
+# Note: Since the styling of scrollbars can currently not be overruled in
+# Webkit/Chromium, the styling will be left out of the default doxygen.css if
+# one or more extra stylesheets have been specified. So if scrollbar
+# customization is desired it has to be added explicitly. For an example see the
+# documentation.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_STYLESHEET  =
+
+# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the HTML output directory. Note
+# that these files will be copied to the base HTML output directory. Use the
+# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
+# files. In the HTML_STYLESHEET file, use the file name only. Also note that the
+# files will be copied as-is; there are no commands or markers available.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_EXTRA_FILES       =
+
+# The HTML_COLORSTYLE tag can be used to specify if the generated HTML output
+# should be rendered with a dark or light theme.
+# Possible values are: LIGHT always generate light mode output, DARK always
+# generate dark mode output, AUTO_LIGHT automatically set the mode according to
+# the user preference, use light mode if no preference is set (the default),
+# AUTO_DARK automatically set the mode according to the user preference, use
+# dark mode if no preference is set and TOGGLE allow to user to switch between
+# light and dark mode via a button.
+# The default value is: AUTO_LIGHT.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE        = AUTO_LIGHT
+
+# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
+# will adjust the colors in the style sheet and background images according to
+# this color. Hue is specified as an angle on a color-wheel, see
+# https://en.wikipedia.org/wiki/Hue for more information. For instance the value
+# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300
+# purple, and 360 is red again.
+# Minimum value: 0, maximum value: 359, default value: 220.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_HUE    = 220
+
+# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
+# in the HTML output. For a value of 0 the output will use gray-scales only. A
+# value of 255 will produce the most vivid colors.
+# Minimum value: 0, maximum value: 255, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_SAT    = 100
+
+# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
+# luminance component of the colors in the HTML output. Values below 100
+# gradually make the output lighter, whereas values above 100 make the output
+# darker. The value divided by 100 is the actual gamma applied, so 80 represents
+# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
+# change the gamma.
+# Minimum value: 40, maximum value: 240, default value: 80.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_COLORSTYLE_GAMMA  = 80
+
+# If the HTML_DYNAMIC_MENUS tag is set to YES then the generated HTML
+# documentation will contain a main index with vertical navigation menus that
+# are dynamically created via JavaScript. If disabled, the navigation index will
+# consists of multiple levels of tabs that are statically embedded in every HTML
+# page. Disable this option to support browsers that do not have JavaScript,
+# like the Qt help browser.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_DYNAMIC_MENUS     = YES
 
 # If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
 # documentation will contain sections that can be hidden and shown after the
-# page has loaded. For this to work a browser that supports
-# JavaScript and DHTML is required (for instance Mozilla 1.0+, Firefox
-# Netscape 6.0+, Internet explorer 5.0+, Konqueror, or Safari).
+# page has loaded.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 HTML_DYNAMIC_SECTIONS  = NO
 
-# If the GENERATE_DOCSET tag is set to YES, additional index files
-# will be generated that can be used as input for Apple's Xcode 3
-# integrated development environment, introduced with OSX 10.5 (Leopard).
-# To create a documentation set, doxygen will generate a Makefile in the
-# HTML output directory. Running make will produce the docset in that
-# directory and running "make install" will install the docset in
-# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find
-# it at startup.
-# See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html
-# for more information.
+# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
+# shown in the various tree structured indices initially; the user can expand
+# and collapse entries dynamically later on. Doxygen will expand the tree to
+# such a level that at most the specified number of entries are visible (unless
+# a fully collapsed tree already exceeds this amount). So setting the number of
+# entries 1 will produce a full collapsed tree by default. 0 is a special value
+# representing an infinite number of entries and will result in a full expanded
+# tree by default.
+# Minimum value: 0, maximum value: 9999, default value: 100.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_INDEX_NUM_ENTRIES = 100
+
+# If the GENERATE_DOCSET tag is set to YES, additional index files will be
+# generated that can be used as input for Apple's Xcode 3 integrated development
+# environment (see:
+# https://developer.apple.com/xcode/), introduced with OSX 10.5 (Leopard). To
+# create a documentation set, doxygen will generate a Makefile in the HTML
+# output directory. Running make will produce the docset in that directory and
+# running make install will install the docset in
+# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
+# startup. See https://developer.apple.com/library/archive/featuredarticles/Doxy
+# genXcode/_index.html for more information.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 GENERATE_DOCSET        = NO
 
-# When GENERATE_DOCSET tag is set to YES, this tag determines the name of the
-# feed. A documentation feed provides an umbrella under which multiple
-# documentation sets from a single provider (such as a company or product suite)
-# can be grouped.
+# This tag determines the name of the docset feed. A documentation feed provides
+# an umbrella under which multiple documentation sets from a single provider
+# (such as a company or product suite) can be grouped.
+# The default value is: Doxygen generated docs.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
 
 DOCSET_FEEDNAME        = "Doxygen generated docs"
 
-# When GENERATE_DOCSET tag is set to YES, this tag specifies a string that
-# should uniquely identify the documentation set bundle. This should be a
-# reverse domain-name style string, e.g. com.mycompany.MyDocSet. Doxygen
-# will append .docset to the name.
+# This tag determines the URL of the docset feed. A documentation feed provides
+# an umbrella under which multiple documentation sets from a single provider
+# (such as a company or product suite) can be grouped.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_FEEDURL         =
+
+# This tag specifies a string that should uniquely identify the documentation
+# set bundle. This should be a reverse domain-name style string, e.g.
+# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
 
 DOCSET_BUNDLE_ID       = org.doxygen.Project
 
-# When GENERATE_PUBLISHER_ID tag specifies a string that should uniquely identify
+# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify
 # the documentation publisher. This should be a reverse domain-name style
 # string, e.g. com.mycompany.MyDocSet.documentation.
-
-#DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
-
-# The GENERATE_PUBLISHER_NAME tag identifies the documentation publisher.
-
-#DOCSET_PUBLISHER_NAME  = Publisher
-
-# If the GENERATE_HTMLHELP tag is set to YES, additional index files
-# will be generated that can be used as input for tools like the
-# Microsoft HTML help workshop to generate a compiled HTML help file (.chm)
-# of the generated HTML documentation.
+# The default value is: org.doxygen.Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
+
+# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
+# The default value is: Publisher.
+# This tag requires that the tag GENERATE_DOCSET is set to YES.
+
+DOCSET_PUBLISHER_NAME  = Publisher
+
+# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
+# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
+# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
+# on Windows. In the beginning of 2021 Microsoft took the original page, with
+# a.o. the download links, offline the HTML help workshop was already many years
+# in maintenance mode). You can download the HTML help workshop from the web
+# archives at Installation executable (see:
+# http://web.archive.org/web/20160201063255/http://download.microsoft.com/downlo
+# ad/0/A/9/0A939EF6-E31C-430F-A3DF-DFAE7960D564/htmlhelp.exe).
+#
+# The HTML Help Workshop contains a compiler that can convert all HTML output
+# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML
+# files are now used as the Windows 98 help format, and will replace the old
+# Windows help format (.hlp) on all Windows platforms in the future. Compressed
+# HTML files also contain an index, a table of contents, and you can search for
+# words in the documentation. The HTML workshop also contains a viewer for
+# compressed HTML files.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 GENERATE_HTMLHELP      = NO
 
-# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can
-# be used to specify the file name of the resulting .chm file. You
-# can add a path in front of the file if the result should not be
+# The CHM_FILE tag can be used to specify the file name of the resulting .chm
+# file. You can add a path in front of the file if the result should not be
 # written to the html output directory.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 CHM_FILE               =
 
-# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can
-# be used to specify the location (absolute path including file name) of
-# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run
-# the HTML help compiler on the generated index.hhp.
+# The HHC_LOCATION tag can be used to specify the location (absolute path
+# including file name) of the HTML help compiler (hhc.exe). If non-empty,
+# doxygen will try to run the HTML help compiler on the generated index.hhp.
+# The file has to be specified with full path.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 HHC_LOCATION           =
 
-# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag
-# controls if a separate .chi index file is generated (YES) or that
-# it should be included in the master .chm file (NO).
+# The GENERATE_CHI flag controls if a separate .chi index file is generated
+# (YES) or that it should be included in the main .chm file (NO).
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 GENERATE_CHI           = NO
 
-# If the GENERATE_HTMLHELP tag is set to YES, the CHM_INDEX_ENCODING
-# is used to encode HtmlHelp index (hhk), content (hhc) and project file
-# content.
+# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc)
+# and project file content.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 CHM_INDEX_ENCODING     =
 
-# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag
-# controls whether a binary table of contents is generated (YES) or a
-# normal table of contents (NO) in the .chm file.
+# The BINARY_TOC flag controls whether a binary table of contents is generated
+# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
+# enables the Previous and Next buttons.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 BINARY_TOC             = NO
 
-# The TOC_EXPAND flag can be set to YES to add extra items for group members
-# to the contents of the HTML help documentation and to the tree view.
+# The TOC_EXPAND flag can be set to YES to add extra items for group members to
+# the table of contents of the HTML help documentation and to the tree view.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
 
 TOC_EXPAND             = NO
 
+# The SITEMAP_URL tag is used to specify the full URL of the place where the
+# generated documentation will be placed on the server by the user during the
+# deployment of the documentation. The generated sitemap is called sitemap.xml
+# and placed on the directory specified by HTML_OUTPUT. In case no SITEMAP_URL
+# is specified no sitemap is generated. For information about the sitemap
+# protocol see https://www.sitemaps.org
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+SITEMAP_URL            =
+
 # If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
-# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated
-# that can be used as input for Qt's qhelpgenerator to generate a
-# Qt Compressed Help (.qch) of the generated HTML documentation.
+# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
+# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help
+# (.qch) of the generated HTML documentation.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 GENERATE_QHP           = NO
 
-# If the QHG_LOCATION tag is specified, the QCH_FILE tag can
-# be used to specify the file name of the resulting .qch file.
-# The path specified is relative to the HTML output folder.
+# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify
+# the file name of the resulting .qch file. The path specified is relative to
+# the HTML output folder.
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QCH_FILE               =
 
-# The QHP_NAMESPACE tag specifies the namespace to use when generating
-# Qt Help Project output. For more information please see
-# http://doc.trolltech.com/qthelpproject.html#namespace
+# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help
+# Project output. For more information please see Qt Help Project / Namespace
+# (see:
+# https://doc.qt.io/archives/qt-4.8/qthelpproject.html#namespace).
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHP_NAMESPACE          = org.doxygen.Project
 
-# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating
-# Qt Help Project output. For more information please see
-# http://doc.trolltech.com/qthelpproject.html#virtual-folders
+# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt
+# Help Project output. For more information please see Qt Help Project / Virtual
+# Folders (see:
+# https://doc.qt.io/archives/qt-4.8/qthelpproject.html#virtual-folders).
+# The default value is: doc.
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHP_VIRTUAL_FOLDER     = doc
 
-# If QHP_CUST_FILTER_NAME is set, it specifies the name of a custom filter to
-# add. For more information please see
-# http://doc.trolltech.com/qthelpproject.html#custom-filters
+# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
+# filter to add. For more information please see Qt Help Project / Custom
+# Filters (see:
+# https://doc.qt.io/archives/qt-4.8/qthelpproject.html#custom-filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHP_CUST_FILTER_NAME   =
 
-# The QHP_CUST_FILT_ATTRS tag specifies the list of the attributes of the
-# custom filter to add. For more information please see
-# <a href="http://doc.trolltech.com/qthelpproject.html#custom-filters">
-# Qt Help Project / Custom Filters</a>.
+# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
+# custom filter to add. For more information please see Qt Help Project / Custom
+# Filters (see:
+# https://doc.qt.io/archives/qt-4.8/qthelpproject.html#custom-filters).
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHP_CUST_FILTER_ATTRS  =
 
 # The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
-# project's
-# filter section matches.
-# <a href="http://doc.trolltech.com/qthelpproject.html#filter-attributes">
-# Qt Help Project / Filter Attributes</a>.
+# project's filter section matches. Qt Help Project / Filter Attributes (see:
+# https://doc.qt.io/archives/qt-4.8/qthelpproject.html#filter-attributes).
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHP_SECT_FILTER_ATTRS  =
 
-# If the GENERATE_QHP tag is set to YES, the QHG_LOCATION tag can
-# be used to specify the location of Qt's qhelpgenerator.
-# If non-empty doxygen will try to run qhelpgenerator on the generated
-# .qhp file.
+# The QHG_LOCATION tag can be used to specify the location (absolute path
+# including file name) of Qt's qhelpgenerator. If non-empty doxygen will try to
+# run qhelpgenerator on the generated .qhp file.
+# This tag requires that the tag GENERATE_QHP is set to YES.
 
 QHG_LOCATION           =
 
-# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files
-#  will be generated, which together with the HTML files, form an Eclipse help
-# plugin. To install this plugin and make it available under the help contents
-# menu in Eclipse, the contents of the directory containing the HTML and XML
-# files needs to be copied into the plugins directory of eclipse. The name of
-# the directory within the plugins directory should be the same as
-# the ECLIPSE_DOC_ID value. After copying Eclipse needs to be restarted before
-# the help appears.
+# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be
+# generated, together with the HTML files, they form an Eclipse help plugin. To
+# install this plugin and make it available under the help contents menu in
+# Eclipse, the contents of the directory containing the HTML and XML files needs
+# to be copied into the plugins directory of eclipse. The name of the directory
+# within the plugins directory should be the same as the ECLIPSE_DOC_ID value.
+# After copying Eclipse needs to be restarted before the help appears.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 GENERATE_ECLIPSEHELP   = NO
 
-# A unique identifier for the eclipse help plugin. When installing the plugin
-# the directory name containing the HTML and XML files should also have
-# this name.
+# A unique identifier for the Eclipse help plugin. When installing the plugin
+# the directory name containing the HTML and XML files should also have this
+# name. Each documentation set should have its own identifier.
+# The default value is: org.doxygen.Project.
+# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
 
 ECLIPSE_DOC_ID         = org.doxygen.Project
 
-# The DISABLE_INDEX tag can be used to turn on/off the condensed index at
-# top of each HTML page. The value NO (the default) enables the index and
-# the value YES disables it.
+# If you want full control over the layout of the generated HTML pages it might
+# be necessary to disable the index and replace it with your own. The
+# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top
+# of each HTML page. A value of NO enables the index and the value YES disables
+# it. Since the tabs in the index contain the same information as the navigation
+# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 DISABLE_INDEX          = NO
 
-# This tag can be used to set the number of enum values (range [1..20])
-# that doxygen will group on one line in the generated HTML documentation.
-
-ENUM_VALUES_PER_LINE   = 4
-
 # The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
-# structure should be generated to display hierarchical information.
-# If the tag value is set to YES, a side panel will be generated
-# containing a tree-like index structure (just like the one that
-# is generated for HTML Help). For this to work a browser that supports
-# JavaScript, DHTML, CSS and frames is required (i.e. any modern browser).
-# Windows users are probably better off using the HTML help feature.
+# structure should be generated to display hierarchical information. If the tag
+# value is set to YES, a side panel will be generated containing a tree-like
+# index structure (just like the one that is generated for HTML Help). For this
+# to work a browser that supports JavaScript, DHTML, CSS and frames is required
+# (i.e. any modern browser). Windows users are probably better off using the
+# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can
+# further fine tune the look of the index (see "Fine-tuning the output"). As an
+# example, the default style sheet generated by doxygen has an example that
+# shows how to put an image at the root of the tree instead of the PROJECT_NAME.
+# Since the tree basically has the same information as the tab index, you could
+# consider setting DISABLE_INDEX to YES when enabling this option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 GENERATE_TREEVIEW      = NO
 
-# By enabling USE_INLINE_TREES, doxygen will generate the Groups, Directories,
-# and Class Hierarchy pages using a tree view instead of an ordered list.
+# When both GENERATE_TREEVIEW and DISABLE_INDEX are set to YES, then the
+# FULL_SIDEBAR option determines if the side bar is limited to only the treeview
+# area (value NO) or if it should extend to the full height of the window (value
+# YES). Setting this to YES gives a layout similar to
+# https://docs.readthedocs.io with more room for contents, but less room for the
+# project logo, title, and description. If either GENERATE_TREEVIEW or
+# DISABLE_INDEX is set to NO, this option has no effect.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+FULL_SIDEBAR           = NO
 
-#USE_INLINE_TREES       = NO
+# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
+# doxygen will group on one line in the generated HTML documentation.
+#
+# Note that a value of 0 will completely suppress the enum values from appearing
+# in the overview section.
+# Minimum value: 0, maximum value: 20, default value: 4.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+ENUM_VALUES_PER_LINE   = 4
 
-# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be
-# used to set the initial width (in pixels) of the frame in which the tree
-# is shown.
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used
+# to set the initial width (in pixels) of the frame in which the tree is shown.
+# Minimum value: 0, maximum value: 1500, default value: 250.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 TREEVIEW_WIDTH         = 250
 
-# When the EXT_LINKS_IN_WINDOW option is set to YES doxygen will open
-# links to external symbols imported via tag files in a separate window.
+# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
+# external symbols imported via tag files in a separate window.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
-#EXT_LINKS_IN_WINDOW    = NO
+EXT_LINKS_IN_WINDOW    = NO
 
-# Use this tag to change the font size of Latex formulas included
-# as images in the HTML documentation. The default is 10. Note that
-# when you change the font size after a successful doxygen run you need
-# to manually remove any form_*.png images from the HTML output directory
-# to force them to be regenerated.
+# If the OBFUSCATE_EMAILS tag is set to YES, doxygen will obfuscate email
+# addresses.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
-FORMULA_FONTSIZE       = 10
+OBFUSCATE_EMAILS       = YES
+
+# If the HTML_FORMULA_FORMAT option is set to svg, doxygen will use the pdf2svg
+# tool (see https://github.com/dawbarton/pdf2svg) or inkscape (see
+# https://inkscape.org) to generate formulas as SVG images instead of PNGs for
+# the HTML output. These images will generally look nicer at scaled resolutions.
+# Possible values are: png (the default) and svg (looks nicer but requires the
+# pdf2svg or inkscape tool).
+# The default value is: png.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+HTML_FORMULA_FORMAT    = png
 
-# Use the FORMULA_TRANSPARENT tag to determine whether or not the images
-# generated for formulas are transparent PNGs. Transparent PNGs are
-# not supported properly for IE 6.0, but are supported on all modern browsers.
-# Note that when changing this option you need to delete any form_*.png files
-# in the HTML output before the changes have effect.
+# Use this tag to change the font size of LaTeX formulas included as images in
+# the HTML documentation. When you change the font size after a successful
+# doxygen run you need to manually remove any form_*.png images from the HTML
+# output directory to force them to be regenerated.
+# Minimum value: 8, maximum value: 50, default value: 10.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
-#FORMULA_TRANSPARENT    = YES
+FORMULA_FONTSIZE       = 10
 
-# When the SEARCHENGINE tag is enabled doxygen will generate a search box
-# for the HTML output. The underlying search engine uses javascript
-# and DHTML and should work on any modern browser. Note that when using
-# HTML help (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets
-# (GENERATE_DOCSET) there is already a search function so this one should
-# typically be disabled. For large projects the javascript based search engine
-# can be slow, then enabling SERVER_BASED_SEARCH may provide a better solution.
+# The FORMULA_MACROFILE can contain LaTeX \newcommand and \renewcommand commands
+# to create new LaTeX commands to be used in formulas as building blocks. See
+# the section "Including formulas" for details.
+
+FORMULA_MACROFILE      =
+
+# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
+# https://www.mathjax.org) which uses client side JavaScript for the rendering
+# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
+# installed or if you want to formulas look prettier in the HTML output. When
+# enabled you may also need to install MathJax separately and configure the path
+# to it using the MATHJAX_RELPATH option.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_HTML is set to YES.
+
+USE_MATHJAX            = NO
+
+# With MATHJAX_VERSION it is possible to specify the MathJax version to be used.
+# Note that the different versions of MathJax have different requirements with
+# regards to the different settings, so it is possible that also other MathJax
+# settings have to be changed when switching between the different MathJax
+# versions.
+# Possible values are: MathJax_2 and MathJax_3.
+# The default value is: MathJax_2.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_VERSION        = MathJax_2
+
+# When MathJax is enabled you can set the default output format to be used for
+# the MathJax output. For more details about the output format see MathJax
+# version 2 (see:
+# http://docs.mathjax.org/en/v2.7-latest/output.html) and MathJax version 3
+# (see:
+# http://docs.mathjax.org/en/latest/web/components/output.html).
+# Possible values are: HTML-CSS (which is slower, but has the best
+# compatibility. This is the name for Mathjax version 2, for MathJax version 3
+# this will be translated into chtml), NativeMML (i.e. MathML. Only supported
+# for NathJax 2. For MathJax version 3 chtml will be used instead.), chtml (This
+# is the name for Mathjax version 3, for MathJax version 2 this will be
+# translated into HTML-CSS) and SVG.
+# The default value is: HTML-CSS.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_FORMAT         = HTML-CSS
+
+# When MathJax is enabled you need to specify the location relative to the HTML
+# output directory using the MATHJAX_RELPATH option. The destination directory
+# should contain the MathJax.js script. For instance, if the mathjax directory
+# is located at the same level as the HTML output directory, then
+# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
+# Content Delivery Network so you can quickly see the result without installing
+# MathJax. However, it is strongly recommended to install a local copy of
+# MathJax from https://www.mathjax.org before deployment. The default value is:
+# - in case of MathJax version 2: https://cdn.jsdelivr.net/npm/mathjax@2
+# - in case of MathJax version 3: https://cdn.jsdelivr.net/npm/mathjax@3
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_RELPATH        =
+
+# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
+# extension names that should be enabled during MathJax rendering. For example
+# for MathJax version 2 (see
+# https://docs.mathjax.org/en/v2.7-latest/tex.html#tex-and-latex-extensions):
+# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
+# For example for MathJax version 3 (see
+# http://docs.mathjax.org/en/latest/input/tex/extensions/index.html):
+# MATHJAX_EXTENSIONS = ams
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_EXTENSIONS     =
+
+# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
+# of code that will be used on startup of the MathJax code. See the MathJax site
+# (see:
+# http://docs.mathjax.org/en/v2.7-latest/output.html) for more details. For an
+# example see the documentation.
+# This tag requires that the tag USE_MATHJAX is set to YES.
+
+MATHJAX_CODEFILE       =
+
+# When the SEARCHENGINE tag is enabled doxygen will generate a search box for
+# the HTML output. The underlying search engine uses javascript and DHTML and
+# should work on any modern browser. Note that when using HTML help
+# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
+# there is already a search function so this one should typically be disabled.
+# For large projects the javascript based search engine can be slow, then
+# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to
+# search using the keyboard; to jump to the search box use <access key> + S
+# (what the <access key> is depends on the OS and browser, but it is typically
+# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down
+# key> to jump into the search results window, the results can be navigated
+# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel
+# the search. The filter options can be selected when the cursor is inside the
+# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys>
+# to select a filter and <Enter> or <escape> to activate or cancel the filter
+# option.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_HTML is set to YES.
 
 SEARCHENGINE           = NO
 
 # When the SERVER_BASED_SEARCH tag is enabled the search engine will be
-# implemented using a PHP enabled web server instead of at the web client
-# using Javascript. Doxygen will generate the search PHP script and index
-# file to put on the web server. The advantage of the server
-# based approach is that it scales better to large projects and allows
-# full text search. The disadvances is that it is more difficult to setup
-# and does not have live searching capabilities.
+# implemented using a web server instead of a web client using JavaScript. There
+# are two flavors of web server based searching depending on the EXTERNAL_SEARCH
+# setting. When disabled, doxygen will generate a PHP script for searching and
+# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing
+# and searching needs to be provided by external tools. See the section
+# "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
 
 SERVER_BASED_SEARCH    = NO
 
+# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP
+# script for searching. Instead the search results are written to an XML file
+# which needs to be processed by an external indexer. Doxygen will invoke an
+# external search engine pointed to by the SEARCHENGINE_URL option to obtain the
+# search results.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see:
+# https://xapian.org/).
+#
+# See the section "External Indexing and Searching" for details.
+# The default value is: NO.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH        = NO
+
+# The SEARCHENGINE_URL should point to a search engine hosted by a web server
+# which will return the search results when EXTERNAL_SEARCH is enabled.
+#
+# Doxygen ships with an example indexer (doxyindexer) and search engine
+# (doxysearch.cgi) which are based on the open source search engine library
+# Xapian (see:
+# https://xapian.org/). See the section "External Indexing and Searching" for
+# details.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHENGINE_URL       =
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
+# search data is written to a file for indexing by an external tool. With the
+# SEARCHDATA_FILE tag the name of this file can be specified.
+# The default file is: searchdata.xml.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+SEARCHDATA_FILE        = searchdata.xml
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
+# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is
+# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple
+# projects and redirect the results back to the right project.
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTERNAL_SEARCH_ID     =
+
+# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen
+# projects other than the one defined by this configuration file, but that are
+# all added to the same external search index. Each project needs to have a
+# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of
+# to a relative location where the documentation can be found. The format is:
+# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
+# This tag requires that the tag SEARCHENGINE is set to YES.
+
+EXTRA_SEARCH_MAPPINGS  =
+
 #---------------------------------------------------------------------------
-# configuration options related to the LaTeX output
+# Configuration options related to the LaTeX output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will
-# generate Latex output.
+# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
+# The default value is: YES.
 
 GENERATE_LATEX         = NO
 
-# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be
-# put in front of it. If left blank `latex' will be used as the default path.
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: latex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 LATEX_OUTPUT           = latex
 
 # The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
-# invoked. If left blank `latex' will be used as the default command name.
-# Note that when enabling USE_PDFLATEX this option is only used for
-# generating bitmaps for formulas in the HTML output, but not in the
-# Makefile that is written to the output directory.
+# invoked.
+#
+# Note that when not enabling USE_PDFLATEX the default is latex when enabling
+# USE_PDFLATEX the default is pdflatex and when in the later case latex is
+# chosen this is overwritten by pdflatex. For specific output languages the
+# default can have been set differently, this depends on the implementation of
+# the output language.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 LATEX_CMD_NAME         = latex
 
-# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to
-# generate index for LaTeX. If left blank `makeindex' will be used as the
-# default command name.
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate
+# index for LaTeX.
+# Note: This tag is used in the Makefile / make.bat.
+# See also: LATEX_MAKEINDEX_CMD for the part in the generated output file
+# (.tex).
+# The default file is: makeindex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 MAKEINDEX_CMD_NAME     = makeindex
 
-# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact
-# LaTeX documents. This may be useful for small projects and may help to
-# save some trees in general.
+# The LATEX_MAKEINDEX_CMD tag can be used to specify the command name to
+# generate index for LaTeX. In case there is no backslash (\) as first character
+# it will be automatically added in the LaTeX code.
+# Note: This tag is used in the generated output file (.tex).
+# See also: MAKEINDEX_CMD_NAME for the part in the Makefile / make.bat.
+# The default value is: makeindex.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
-COMPACT_LATEX          = NO
+LATEX_MAKEINDEX_CMD    = makeindex
 
-# The PAPER_TYPE tag can be used to set the paper type that is used
-# by the printer. Possible values are: a4, a4wide, letter, legal and
-# executive. If left blank a4wide will be used.
+# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
-#PAPER_TYPE             = a4wide
+COMPACT_LATEX          = NO
 
-# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX
-# packages that should be included in the LaTeX output.
+# The PAPER_TYPE tag can be used to set the paper type that is used by the
+# printer.
+# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x
+# 14 inches) and executive (7.25 x 10.5 inches).
+# The default value is: a4.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+PAPER_TYPE             = a4
+
+# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names
+# that should be included in the LaTeX output. The package can be specified just
+# by its name or with the correct syntax as to be used with the LaTeX
+# \usepackage command. To get the times font for instance you can specify :
+# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times}
+# To use the option intlimits with the amsmath package you can specify:
+# EXTRA_PACKAGES=[intlimits]{amsmath}
+# If left blank no extra packages will be included.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 EXTRA_PACKAGES         =
 
-# The LATEX_HEADER tag can be used to specify a personal LaTeX header for
-# the generated latex document. The header should contain everything until
-# the first chapter. If it is left blank doxygen will generate a
-# standard header. Notice: only use this tag if you know what you are doing!
+# The LATEX_HEADER tag can be used to specify a user-defined LaTeX header for
+# the generated LaTeX document. The header should contain everything until the
+# first chapter. If it is left blank doxygen will generate a standard header. It
+# is highly recommended to start with a default header using
+# doxygen -w latex new_header.tex new_footer.tex new_stylesheet.sty
+# and then modify the file new_header.tex. See also section "Doxygen usage" for
+# information on how to generate the default header that doxygen normally uses.
+#
+# Note: Only use a user-defined header if you know what you are doing!
+# Note: The header is subject to change so you typically have to regenerate the
+# default header when upgrading to a newer version of doxygen. The following
+# commands have a special meaning inside the header (and footer): For a
+# description of the possible markers and block names see the documentation.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 LATEX_HEADER           =
 
-# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated
-# is prepared for conversion to pdf (using ps2pdf). The pdf file will
-# contain links (just like the HTML output) instead of page references
-# This makes the output suitable for online browsing using a pdf viewer.
+# The LATEX_FOOTER tag can be used to specify a user-defined LaTeX footer for
+# the generated LaTeX document. The footer should contain everything after the
+# last chapter. If it is left blank doxygen will generate a standard footer. See
+# LATEX_HEADER for more information on how to generate a default footer and what
+# special commands can be used inside the footer. See also section "Doxygen
+# usage" for information on how to generate the default footer that doxygen
+# normally uses. Note: Only use a user-defined footer if you know what you are
+# doing!
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_FOOTER           =
+
+# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined
+# LaTeX style sheets that are included after the standard style sheets created
+# by doxygen. Using this option one can overrule certain style aspects. Doxygen
+# will copy the style sheet files to the output directory.
+# Note: The order of the extra style sheet files is of importance (e.g. the last
+# style sheet in the list overrules the setting of the previous ones in the
+# list).
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_STYLESHEET =
+
+# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or
+# other source files which should be copied to the LATEX_OUTPUT output
+# directory. Note that the files will be copied as-is; there are no commands or
+# markers available.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EXTRA_FILES      =
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
+# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will
+# contain links (just like the HTML output) instead of page references. This
+# makes the output suitable for online browsing using a PDF viewer.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 PDF_HYPERLINKS         = NO
 
-# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of
-# plain latex in the generated Makefile. Set this option to YES to get a
-# higher quality PDF documentation.
+# If the USE_PDFLATEX tag is set to YES, doxygen will use the engine as
+# specified with LATEX_CMD_NAME to generate the PDF file directly from the LaTeX
+# files. Set this option to YES, to get a higher quality PDF documentation.
+#
+# See also section LATEX_CMD_NAME for selecting the engine.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 USE_PDFLATEX           = NO
 
-# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode.
-# command to the generated LaTeX files. This will instruct LaTeX to keep
-# running if errors occur, instead of asking the user for help.
-# This option is also used when generating formulas in HTML.
+# The LATEX_BATCHMODE tag ignals the behavior of LaTeX in case of an error.
+# Possible values are: NO same as ERROR_STOP, YES same as BATCH, BATCH In batch
+# mode nothing is printed on the terminal, errors are scrolled as if <return> is
+# hit at every error; missing files that TeX tries to input or request from
+# keyboard input (\read on a not open input stream) cause the job to abort,
+# NON_STOP In nonstop mode the diagnostic message will appear on the terminal,
+# but there is no possibility of user interaction just like in batch mode,
+# SCROLL In scroll mode, TeX will stop only for missing files to input or if
+# keyboard input is necessary and ERROR_STOP In errorstop mode, TeX will stop at
+# each error, asking for user intervention.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 LATEX_BATCHMODE        = NO
 
-# If LATEX_HIDE_INDICES is set to YES then doxygen will not
-# include the index chapters (such as File Index, Compound Index, etc.)
-# in the output.
+# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the
+# index chapters (such as File Index, Compound Index, etc.) in the output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
 LATEX_HIDE_INDICES     = NO
 
-# If LATEX_SOURCE_CODE is set to YES then doxygen will include
-# source code with syntax highlighting in the LaTeX output.
-# Note that which sources are shown also depends on other settings
-# such as SOURCE_BROWSER.
+# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
+# bibliography, e.g. plainnat, or ieeetr. See
+# https://en.wikipedia.org/wiki/BibTeX and \cite for more info.
+# The default value is: plain.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
 
-LATEX_SOURCE_CODE      = NO
+LATEX_BIB_STYLE        = plain
+
+# The LATEX_EMOJI_DIRECTORY tag is used to specify the (relative or absolute)
+# path from which the emoji images will be read. If a relative path is entered,
+# it will be relative to the LATEX_OUTPUT directory. If left blank the
+# LATEX_OUTPUT directory will be used.
+# This tag requires that the tag GENERATE_LATEX is set to YES.
+
+LATEX_EMOJI_DIRECTORY  =
 
 #---------------------------------------------------------------------------
-# configuration options related to the RTF output
+# Configuration options related to the RTF output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output
-# The RTF output is optimized for Word 97 and may not look very pretty with
-# other RTF readers or editors.
+# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The
+# RTF output is optimized for Word 97 and may not look too pretty with other RTF
+# readers/editors.
+# The default value is: NO.
 
 GENERATE_RTF           = NO
 
-# The RTF_OUTPUT tag is used to specify where the RTF docs will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be
-# put in front of it. If left blank `rtf' will be used as the default path.
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: rtf.
+# This tag requires that the tag GENERATE_RTF is set to YES.
 
 RTF_OUTPUT             = rtf
 
-# If the COMPACT_RTF tag is set to YES Doxygen generates more compact
-# RTF documents. This may be useful for small projects and may help to
-# save some trees in general.
+# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
+# documents. This may be useful for small projects and may help to save some
+# trees in general.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
 
 COMPACT_RTF            = NO
 
-# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated
-# will contain hyperlink fields. The RTF file will
-# contain links (just like the HTML output) instead of page references.
-# This makes the output suitable for online browsing using WORD or other
-# programs which support those fields.
-# Note: wordpad (write) and others do not support links.
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
+# contain hyperlink fields. The RTF file will contain links (just like the HTML
+# output) instead of page references. This makes the output suitable for online
+# browsing using Word or some other Word compatible readers that support those
+# fields.
+#
+# Note: WordPad (write) and others do not support links.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_RTF is set to YES.
 
 RTF_HYPERLINKS         = NO
 
 # Load stylesheet definitions from file. Syntax is similar to doxygen's
-# config file, i.e. a series of assignments. You only have to provide
+# configuration file, i.e. a series of assignments. You only have to provide
 # replacements, missing definitions are set to their default value.
+#
+# See also section "Doxygen usage" for information on how to generate the
+# default style sheet that doxygen normally uses.
+# This tag requires that the tag GENERATE_RTF is set to YES.
 
 RTF_STYLESHEET_FILE    =
 
-# Set optional variables used in the generation of an rtf document.
-# Syntax is similar to doxygen's config file.
+# Set optional variables used in the generation of an RTF document. Syntax is
+# similar to doxygen's configuration file. A template extensions file can be
+# generated using doxygen -e rtf extensionFile.
+# This tag requires that the tag GENERATE_RTF is set to YES.
 
 RTF_EXTENSIONS_FILE    =
 
 #---------------------------------------------------------------------------
-# configuration options related to the man page output
+# Configuration options related to the man page output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_MAN tag is set to YES (the default) Doxygen will
-# generate man pages
+# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
+# classes and files.
+# The default value is: NO.
 
 GENERATE_MAN           = NO
 
-# The MAN_OUTPUT tag is used to specify where the man pages will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be
-# put in front of it. If left blank `man' will be used as the default path.
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it. A directory man3 will be created inside the directory specified by
+# MAN_OUTPUT.
+# The default directory is: man.
+# This tag requires that the tag GENERATE_MAN is set to YES.
 
 MAN_OUTPUT             = man
 
-# The MAN_EXTENSION tag determines the extension that is added to
-# the generated man pages (default is the subroutine's section .3)
+# The MAN_EXTENSION tag determines the extension that is added to the generated
+# man pages. In case the manual section does not start with a number, the number
+# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
+# optional.
+# The default value is: .3.
+# This tag requires that the tag GENERATE_MAN is set to YES.
 
 MAN_EXTENSION          = .3
 
-# If the MAN_LINKS tag is set to YES and Doxygen generates man output,
-# then it will generate one additional man file for each entity
-# documented in the real man page(s). These additional files
-# only source the real man page, but without them the man command
-# would be unable to find the correct page. The default is NO.
+# The MAN_SUBDIR tag determines the name of the directory created within
+# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by
+# MAN_EXTENSION with the initial . removed.
+# This tag requires that the tag GENERATE_MAN is set to YES.
+
+MAN_SUBDIR             =
+
+# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it
+# will generate one additional man file for each entity documented in the real
+# man page(s). These additional files only source the real man page, but without
+# them the man command would be unable to find the correct page.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_MAN is set to YES.
 
 MAN_LINKS              = NO
 
 #---------------------------------------------------------------------------
-# configuration options related to the XML output
+# Configuration options related to the XML output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_XML tag is set to YES Doxygen will
-# generate an XML file that captures the structure of
-# the code including all documentation.
+# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that
+# captures the structure of the code including all documentation.
+# The default value is: NO.
 
 GENERATE_XML           = YES
 
-# The XML_OUTPUT tag is used to specify where the XML pages will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be
-# put in front of it. If left blank `xml' will be used as the default path.
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
+# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
+# it.
+# The default directory is: xml.
+# This tag requires that the tag GENERATE_XML is set to YES.
 
 XML_OUTPUT             = xml
 
-# The XML_SCHEMA tag can be used to specify an XML schema,
-# which can be used by a validating XML parser to check the
-# syntax of the XML files.
+# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
+# listings (including syntax highlighting and cross-referencing information) to
+# the XML output. Note that enabling this will significantly increase the size
+# of the XML output.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_XML is set to YES.
 
-#XML_SCHEMA             =
+XML_PROGRAMLISTING     = YES
 
-# The XML_DTD tag can be used to specify an XML DTD,
-# which can be used by a validating XML parser to check the
-# syntax of the XML files.
+# If the XML_NS_MEMB_FILE_SCOPE tag is set to YES, doxygen will include
+# namespace members in file scope as well, matching the HTML output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_XML is set to YES.
 
-#XML_DTD                =
+XML_NS_MEMB_FILE_SCOPE = NO
 
-# If the XML_PROGRAMLISTING tag is set to YES Doxygen will
-# dump the program listings (including syntax highlighting
-# and cross-referencing information) to the XML output. Note that
-# enabling this will significantly increase the size of the XML output.
+#---------------------------------------------------------------------------
+# Configuration options related to the DOCBOOK output
+#---------------------------------------------------------------------------
 
-XML_PROGRAMLISTING     = YES
+# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files
+# that can be used to generate PDF.
+# The default value is: NO.
+
+GENERATE_DOCBOOK       = NO
+
+# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
+# front of it.
+# The default directory is: docbook.
+# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
+
+DOCBOOK_OUTPUT         = docbook
 
 #---------------------------------------------------------------------------
-# configuration options for the AutoGen Definitions output
+# Configuration options for the AutoGen Definitions output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will
-# generate an AutoGen Definitions (see autogen.sf.net) file
-# that captures the structure of the code including all
-# documentation. Note that this feature is still experimental
-# and incomplete at the moment.
+# If the GENERATE_AUTOGEN_DEF tag is set to YES, doxygen will generate an
+# AutoGen Definitions (see https://autogen.sourceforge.net/) file that captures
+# the structure of the code including all documentation. Note that this feature
+# is still experimental and incomplete at the moment.
+# The default value is: NO.
 
 GENERATE_AUTOGEN_DEF   = NO
 
 #---------------------------------------------------------------------------
-# configuration options related to the Perl module output
+# Configuration options related to the Perl module output
 #---------------------------------------------------------------------------
 
-# If the GENERATE_PERLMOD tag is set to YES Doxygen will
-# generate a Perl module file that captures the structure of
-# the code including all documentation. Note that this
-# feature is still experimental and incomplete at the
-# moment.
+# If the GENERATE_PERLMOD tag is set to YES, doxygen will generate a Perl module
+# file that captures the structure of the code including all documentation.
+#
+# Note that this feature is still experimental and incomplete at the moment.
+# The default value is: NO.
 
 GENERATE_PERLMOD       = NO
 
-# If the PERLMOD_LATEX tag is set to YES Doxygen will generate
-# the necessary Makefile rules, Perl scripts and LaTeX code to be able
-# to generate PDF and DVI output from the Perl module output.
+# If the PERLMOD_LATEX tag is set to YES, doxygen will generate the necessary
+# Makefile rules, Perl scripts and LaTeX code to be able to generate PDF and DVI
+# output from the Perl module output.
+# The default value is: NO.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
 
 PERLMOD_LATEX          = NO
 
-# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be
-# nicely formatted so it can be parsed by a human reader.
-# This is useful
-# if you want to understand what is going on.
-# On the other hand, if this
-# tag is set to NO the size of the Perl module output will be much smaller
-# and Perl will parse it just the same.
+# If the PERLMOD_PRETTY tag is set to YES, the Perl module output will be nicely
+# formatted so it can be parsed by a human reader. This is useful if you want to
+# understand what is going on. On the other hand, if this tag is set to NO, the
+# size of the Perl module output will be much smaller and Perl will parse it
+# just the same.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
 
 PERLMOD_PRETTY         = YES
 
-# The names of the make variables in the generated doxyrules.make file
-# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX.
-# This is useful so different doxyrules.make files included by the same
-# Makefile don't overwrite each other's variables.
+# The names of the make variables in the generated doxyrules.make file are
+# prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. This is useful
+# so different doxyrules.make files included by the same Makefile don't
+# overwrite each other's variables.
+# This tag requires that the tag GENERATE_PERLMOD is set to YES.
 
 PERLMOD_MAKEVAR_PREFIX =
 
@@ -1346,311 +2305,473 @@ PERLMOD_MAKEVAR_PREFIX =
 # Configuration options related to the preprocessor
 #---------------------------------------------------------------------------
 
-# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will
-# evaluate all C-preprocessor directives found in the sources and include
-# files.
+# If the ENABLE_PREPROCESSING tag is set to YES, doxygen will evaluate all
+# C-preprocessor directives found in the sources and include files.
+# The default value is: YES.
 
 ENABLE_PREPROCESSING   = YES
 
-# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro
-# names in the source code. If set to NO (the default) only conditional
-# compilation will be performed. Macro expansion can be done in a controlled
-# way by setting EXPAND_ONLY_PREDEF to YES.
+# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro names
+# in the source code. If set to NO, only conditional compilation will be
+# performed. Macro expansion can be done in a controlled way by setting
+# EXPAND_ONLY_PREDEF to YES.
+# The default value is: NO.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 MACRO_EXPANSION        = YES
 
-# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES
-# then the macro expansion is limited to the macros specified with the
-# PREDEFINED and EXPAND_AS_DEFINED tags.
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then
+# the macro expansion is limited to the macros specified with the PREDEFINED and
+# EXPAND_AS_DEFINED tags.
+# The default value is: NO.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 EXPAND_ONLY_PREDEF     = YES
 
-# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files
-# in the INCLUDE_PATH (see below) will be search if a #include is found.
+# If the SEARCH_INCLUDES tag is set to YES, the include files in the
+# INCLUDE_PATH will be searched if a #include is found.
+# The default value is: YES.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 SEARCH_INCLUDES        = YES
 
 # The INCLUDE_PATH tag can be used to specify one or more directories that
-# contain include files that are not input files but should be processed by
-# the preprocessor.
+# contain include files that are not input files but should be processed by the
+# preprocessor. Note that the INCLUDE_PATH is not recursive, so the setting of
+# RECURSIVE has no effect here.
+# This tag requires that the tag SEARCH_INCLUDES is set to YES.
 
 INCLUDE_PATH           =
 
 # You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
 # patterns (like *.h and *.hpp) to filter out the header-files in the
-# directories. If left blank, the patterns specified with FILE_PATTERNS will
-# be used.
+# directories. If left blank, the patterns specified with FILE_PATTERNS will be
+# used.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 INCLUDE_FILE_PATTERNS  = *.h
 
-# The PREDEFINED tag can be used to specify one or more macro names that
-# are defined before the preprocessor is started (similar to the -D option of
-# gcc). The argument of the tag is a list of macros of the form: name
-# or name=definition (no spaces). If the definition and the = are
-# omitted =1 is assumed. To prevent a macro definition from being
-# undefined via #undef or recursively expanded use the := operator
-# instead of the = operator.
+# The PREDEFINED tag can be used to specify one or more macro names that are
+# defined before the preprocessor is started (similar to the -D option of e.g.
+# gcc). The argument of the tag is a list of macros of the form: name or
+# name=definition (no spaces). If the definition and the "=" are omitted, "=1"
+# is assumed. To prevent a macro definition from being undefined via #undef or
+# recursively expanded use the := operator instead of the = operator.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 PREDEFINED             = DOXYGEN
 
-# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then
-# this tag can be used to specify a list of macro names that should be expanded.
-# The macro definition that is found in the sources will be used.
-# Use the PREDEFINED tag if you want to use a different macro definition.
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
+# tag can be used to specify a list of macro names that should be expanded. The
+# macro definition that is found in the sources will be used. Use the PREDEFINED
+# tag if you want to use a different macro definition that overrules the
+# definition found in the source code.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 EXPAND_AS_DEFINED      = ATTR_UNUSED
 
-# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then
-# doxygen's preprocessor will remove all function-like macros that are alone
-# on a line, have an all uppercase name, and do not end with a semicolon. Such
-# function macros are typically used for boiler-plate code, and will confuse
-# the parser if not removed.
+# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor will
+# remove all references to function-like macros that are alone on a line, have
+# an all uppercase name, and do not end with a semicolon. Such function macros
+# are typically used for boiler-plate code, and will confuse the parser if not
+# removed.
+# The default value is: YES.
+# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 SKIP_FUNCTION_MACROS   = YES
 
 #---------------------------------------------------------------------------
-# Configuration::additions related to external references
+# Configuration options related to external references
 #---------------------------------------------------------------------------
 
-# The TAGFILES option can be used to specify one or more tagfiles.
-# Optionally an initial location of the external documentation
-# can be added for each tagfile. The format of a tag file without
-# this location is as follows:
-#
+# The TAGFILES tag can be used to specify one or more tag files. For each tag
+# file the location of the external documentation should be added. The format of
+# a tag file without this location is as follows:
 # TAGFILES = file1 file2 ...
 # Adding location for the tag files is done as follows:
-#
 # TAGFILES = file1=loc1 "file2 = loc2" ...
-# where "loc1" and "loc2" can be relative or absolute paths or
-# URLs. If a location is present for each tag, the installdox tool
-# does not have to be run to correct the links.
-# Note that each tag file must have a unique name
-# (where the name does NOT include the path)
-# If a tag file is not located in the directory in which doxygen
-# is run, you must also specify the path to the tagfile here.
+# where loc1 and loc2 can be relative or absolute paths or URLs. See the
+# section "Linking to external documentation" for more information about the use
+# of tag files.
+# Note: Each tag file must have a unique name (where the name does NOT include
+# the path). If a tag file is not located in the directory in which doxygen is
+# run, you must also specify the path to the tagfile here.
 
 TAGFILES               =
 
-# When a file name is specified after GENERATE_TAGFILE, doxygen will create
-# a tag file that is based on the input files it reads.
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create a
+# tag file that is based on the input files it reads. See section "Linking to
+# external documentation" for more information about the usage of tag files.
 
 GENERATE_TAGFILE       =
 
-# If the ALLEXTERNALS tag is set to YES all external classes will be listed
-# in the class index. If set to NO only the inherited external classes
-# will be listed.
+# If the ALLEXTERNALS tag is set to YES, all external class will be listed in
+# the class index. If set to NO, only the inherited external classes will be
+# listed.
+# The default value is: NO.
 
 ALLEXTERNALS           = NO
 
-# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed
-# in the modules index. If set to NO, only the current project's groups will
-# be listed.
+# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed
+# in the modules index. If set to NO, only the current project's groups will be
+# listed.
+# The default value is: YES.
 
 EXTERNAL_GROUPS        = YES
 
-# The PERL_PATH should be the absolute path and name of the perl script
-# interpreter (i.e. the result of `which perl').
+# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in
+# the related pages index. If set to NO, only the current project's pages will
+# be listed.
+# The default value is: YES.
 
-#PERL_PATH              = /usr/bin/perl
+EXTERNAL_PAGES         = YES
 
 #---------------------------------------------------------------------------
-# Configuration options related to the dot tool
+# Configuration options related to diagram generator tools
 #---------------------------------------------------------------------------
 
-# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will
-# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base
-# or super classes. Setting the tag to NO turns the diagrams off. Note that
-# this option is superseded by the HAVE_DOT option below. This is only a
-# fallback. It is recommended to install and use dot, since it yields more
-# powerful graphs.
-
-CLASS_DIAGRAMS         = YES
-
-# You can define message sequence charts within doxygen comments using the \msc
-# command. Doxygen will then run the mscgen tool (see
-# http://www.mcternan.me.uk/mscgen/) to produce the chart and insert it in the
-# documentation. The MSCGEN_PATH tag allows you to specify the directory where
-# the mscgen tool resides. If left empty the tool is assumed to be found in the
-# default search path.
-
-#MSCGEN_PATH            =
-
-# If set to YES, the inheritance and collaboration graphs will hide
-# inheritance and usage relations if the target is undocumented
-# or is not a class.
+# If set to YES the inheritance and collaboration graphs will hide inheritance
+# and usage relations if the target is undocumented or is not a class.
+# The default value is: YES.
 
 HIDE_UNDOC_RELATIONS   = YES
 
 # If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
-# available from the path. This tool is part of Graphviz, a graph visualization
-# toolkit from AT&T and Lucent Bell Labs. The other options in this section
-# have no effect if this option is set to NO (the default)
+# available from the path. This tool is part of Graphviz (see:
+# https://www.graphviz.org/), a graph visualization toolkit from AT&T and Lucent
+# Bell Labs. The other options in this section have no effect if this option is
+# set to NO
+# The default value is: NO.
 
 HAVE_DOT               = NO
 
-# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is
-# allowed to run in parallel. When set to 0 (the default) doxygen will
-# base this on the number of processors available in the system. You can set it
-# explicitly to a value larger than 0 to get control over the balance
-# between CPU load and processing speed.
-
-#DOT_NUM_THREADS        = 0
-
-# By default doxygen will write a font called FreeSans.ttf to the output
-# directory and reference it in all dot files that doxygen generates. This
-# font does not include all possible unicode characters however, so when you need
-# these (or just want a differently looking font) you can specify the font name
-# using DOT_FONTNAME. You need need to make sure dot is able to find the font,
-# which can be done by putting it in a standard location or by setting the
-# DOTFONTPATH environment variable or by setting DOT_FONTPATH to the directory
-# containing the font.
-
-#DOT_FONTNAME           = FreeSans.ttf
-
-# The DOT_FONTSIZE tag can be used to set the size of the font of dot graphs.
-# The default size is 10pt.
-
-DOT_FONTSIZE           = 10
-
-# By default doxygen will tell dot to use the output directory to look for the
-# FreeSans.ttf font (which doxygen will put there itself). If you specify a
-# different font using DOT_FONTNAME you can set the path where dot
-# can find it using this tag.
+# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
+# to run in parallel. When set to 0 doxygen will base this on the number of
+# processors available in the system. You can set it explicitly to a value
+# larger than 0 to get control over the balance between CPU load and processing
+# speed.
+# Minimum value: 0, maximum value: 32, default value: 0.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_NUM_THREADS        = 0
+
+# DOT_COMMON_ATTR is common attributes for nodes, edges and labels of
+# subgraphs. When you want a differently looking font in the dot files that
+# doxygen generates you can specify fontname, fontcolor and fontsize attributes.
+# For details please see <a href=https://graphviz.org/doc/info/attrs.html>Node,
+# Edge and Graph Attributes specification</a> You need to make sure dot is able
+# to find the font, which can be done by putting it in a standard location or by
+# setting the DOTFONTPATH environment variable or by setting DOT_FONTPATH to the
+# directory containing the font. Default graphviz fontsize is 14.
+# The default value is: fontname=Helvetica,fontsize=10.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_COMMON_ATTR        = "fontname=Helvetica,fontsize=10"
+
+# DOT_EDGE_ATTR is concatenated with DOT_COMMON_ATTR. For elegant style you can
+# add 'arrowhead=open, arrowtail=open, arrowsize=0.5'. <a
+# href=https://graphviz.org/doc/info/arrows.html>Complete documentation about
+# arrows shapes.</a>
+# The default value is: labelfontname=Helvetica,labelfontsize=10.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_EDGE_ATTR          = "labelfontname=Helvetica,labelfontsize=10"
+
+# DOT_NODE_ATTR is concatenated with DOT_COMMON_ATTR. For view without boxes
+# around nodes set 'shape=plain' or 'shape=plaintext' <a
+# href=https://www.graphviz.org/doc/info/shapes.html>Shapes specification</a>
+# The default value is: shape=box,height=0.2,width=0.4.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_NODE_ATTR          = "shape=box,height=0.2,width=0.4"
+
+# You can set the path where dot can find font specified with fontname in
+# DOT_COMMON_ATTR and others dot attributes.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_FONTPATH           =
 
-# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen
-# will generate a graph for each documented class showing the direct and
-# indirect inheritance relations. Setting this tag to YES will force the
-# the CLASS_DIAGRAMS tag to NO.
+# If the CLASS_GRAPH tag is set to YES or GRAPH or BUILTIN then doxygen will
+# generate a graph for each documented class showing the direct and indirect
+# inheritance relations. In case the CLASS_GRAPH tag is set to YES or GRAPH and
+# HAVE_DOT is enabled as well, then dot will be used to draw the graph. In case
+# the CLASS_GRAPH tag is set to YES and HAVE_DOT is disabled or if the
+# CLASS_GRAPH tag is set to BUILTIN, then the built-in generator will be used.
+# If the CLASS_GRAPH tag is set to TEXT the direct and indirect inheritance
+# relations will be shown as texts / links.
+# Possible values are: NO, YES, TEXT, GRAPH and BUILTIN.
+# The default value is: YES.
 
 CLASS_GRAPH            = YES
 
-# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen
-# will generate a graph for each documented class showing the direct and
-# indirect implementation dependencies (inheritance, containment, and
-# class references variables) of the class with other documented classes.
+# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
+# graph for each documented class showing the direct and indirect implementation
+# dependencies (inheritance, containment, and class references variables) of the
+# class with other documented classes.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 COLLABORATION_GRAPH    = YES
 
-# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen
-# will generate a graph for groups, showing the direct groups dependencies
+# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for
+# groups, showing the direct groups dependencies. See also the chapter Grouping
+# in the manual.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 GROUP_GRAPHS           = YES
 
-# If the UML_LOOK tag is set to YES doxygen will generate inheritance and
+# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
 # collaboration diagrams in a style similar to the OMG's Unified Modeling
 # Language.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 UML_LOOK               = NO
 
-# If set to YES, the inheritance and collaboration graphs will show the
-# relations between templates and their instances.
+# If the UML_LOOK tag is enabled, the fields and methods are shown inside the
+# class node. If there are many fields or methods and many nodes the graph may
+# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the
+# number of items for each type to make the size more manageable. Set this to 0
+# for no limit. Note that the threshold may be exceeded by 50% before the limit
+# is enforced. So when you set the threshold to 10, up to 15 fields may appear,
+# but if the number exceeds 15, the total amount of fields shown is limited to
+# 10.
+# Minimum value: 0, maximum value: 100, default value: 10.
+# This tag requires that the tag UML_LOOK is set to YES.
+
+UML_LIMIT_NUM_FIELDS   = 10
+
+# If the DOT_UML_DETAILS tag is set to NO, doxygen will show attributes and
+# methods without types and arguments in the UML graphs. If the DOT_UML_DETAILS
+# tag is set to YES, doxygen will add type and arguments for attributes and
+# methods in the UML graphs. If the DOT_UML_DETAILS tag is set to NONE, doxygen
+# will not generate fields with class member information in the UML graphs. The
+# class diagrams will look similar to the default class diagrams but using UML
+# notation for the relationships.
+# Possible values are: NO, YES and NONE.
+# The default value is: NO.
+# This tag requires that the tag UML_LOOK is set to YES.
+
+DOT_UML_DETAILS        = NO
+
+# The DOT_WRAP_THRESHOLD tag can be used to set the maximum number of characters
+# to display on a single line. If the actual line length exceeds this threshold
+# significantly it will wrapped across multiple lines. Some heuristics are apply
+# to avoid ugly line breaks.
+# Minimum value: 0, maximum value: 1000, default value: 17.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+DOT_WRAP_THRESHOLD     = 17
+
+# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and
+# collaboration graphs will show the relations between templates and their
+# instances.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 TEMPLATE_RELATIONS     = NO
 
-# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT
-# tags are set to YES then doxygen will generate a graph for each documented
-# file showing the direct and indirect include dependencies of the file with
-# other documented files.
+# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are set to
+# YES then doxygen will generate a graph for each documented file showing the
+# direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 INCLUDE_GRAPH          = YES
 
-# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and
-# HAVE_DOT tags are set to YES then doxygen will generate a graph for each
-# documented header file showing the documented files that directly or
-# indirectly include this file.
+# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are
+# set to YES then doxygen will generate a graph for each documented file showing
+# the direct and indirect include dependencies of the file with other documented
+# files.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 INCLUDED_BY_GRAPH      = YES
 
-# If the CALL_GRAPH and HAVE_DOT options are set to YES then
-# doxygen will generate a call dependency graph for every global function
-# or class method. Note that enabling this option will significantly increase
-# the time of a run. So in most cases it will be better to enable call graphs
-# for selected functions only using the \callgraph command.
+# If the CALL_GRAPH tag is set to YES then doxygen will generate a call
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable call graphs for selected
+# functions only using the \callgraph command. Disabling a call graph can be
+# accomplished by means of the command \hidecallgraph.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 CALL_GRAPH             = NO
 
-# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then
-# doxygen will generate a caller dependency graph for every global function
-# or class method. Note that enabling this option will significantly increase
-# the time of a run. So in most cases it will be better to enable caller
-# graphs for selected functions only using the \callergraph command.
+# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
+# dependency graph for every global function or class method.
+#
+# Note that enabling this option will significantly increase the time of a run.
+# So in most cases it will be better to enable caller graphs for selected
+# functions only using the \callergraph command. Disabling a caller graph can be
+# accomplished by means of the command \hidecallergraph.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 CALLER_GRAPH           = NO
 
-# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen
-# will graphical hierarchy of all classes instead of a textual one.
+# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
+# hierarchy of all classes instead of a textual one.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 GRAPHICAL_HIERARCHY    = YES
 
-# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES
-# then doxygen will show the dependencies a directory has on other directories
-# in a graphical way. The dependency relations are determined by the #include
-# relations between the files in the directories.
+# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the
+# dependencies a directory has on other directories in a graphical way. The
+# dependency relations are determined by the #include relations between the
+# files in the directories.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DIRECTORY_GRAPH        = YES
 
+# The DIR_GRAPH_MAX_DEPTH tag can be used to limit the maximum number of levels
+# of child directories generated in directory dependency graphs by dot.
+# Minimum value: 1, maximum value: 25, default value: 1.
+# This tag requires that the tag DIRECTORY_GRAPH is set to YES.
+
+DIR_GRAPH_MAX_DEPTH    = 1
+
 # The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
-# generated by dot. Possible values are png, jpg, or gif
-# If left blank png will be used.
+# generated by dot. For an explanation of the image formats see the section
+# output formats in the documentation of the dot tool (Graphviz (see:
+# https://www.graphviz.org/)).
+# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in order
+# to make the SVG files visible in IE 9+ (other browsers do not have this
+# requirement).
+# Possible values are: png, jpg, gif, svg, png:gd, png:gd:gd, png:cairo,
+# png:cairo:gd, png:cairo:cairo, png:cairo:gdiplus, png:gdiplus and
+# png:gdiplus:gdiplus.
+# The default value is: png.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_IMAGE_FORMAT       = png
 
-# The tag DOT_PATH can be used to specify the path where the dot tool can be
+# If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
+# enable generation of interactive SVG images that allow zooming and panning.
+#
+# Note that this requires a modern browser other than Internet Explorer. Tested
+# and working are Firefox, Chrome, Safari, and Opera.
+# Note: For IE 9+ you need to set HTML_FILE_EXTENSION to xhtml in order to make
+# the SVG files visible. Older versions of IE do not have SVG support.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
+
+INTERACTIVE_SVG        = NO
+
+# The DOT_PATH tag can be used to specify the path where the dot tool can be
 # found. If left blank, it is assumed the dot tool can be found in the path.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_PATH               =
 
 # The DOTFILE_DIRS tag can be used to specify one or more directories that
-# contain dot files that are included in the documentation (see the
-# \dotfile command).
+# contain dot files that are included in the documentation (see the \dotfile
+# command).
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOTFILE_DIRS           =
 
-# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of
-# nodes that will be shown in the graph. If the number of nodes in a graph
-# becomes larger than this value, doxygen will truncate the graph, which is
-# visualized by representing a node as a red box. Note that doxygen if the
-# number of direct children of the root node in a graph is already larger than
-# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note
-# that the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+# You can include diagrams made with dia in doxygen documentation. Doxygen will
+# then run dia to produce the diagram and insert it in the documentation. The
+# DIA_PATH tag allows you to specify the directory where the dia binary resides.
+# If left empty dia is assumed to be found in the default search path.
+
+DIA_PATH               =
+
+# The DIAFILE_DIRS tag can be used to specify one or more directories that
+# contain dia files that are included in the documentation (see the \diafile
+# command).
+
+DIAFILE_DIRS           =
+
+# When using plantuml, the PLANTUML_JAR_PATH tag should be used to specify the
+# path where java can find the plantuml.jar file or to the filename of jar file
+# to be used. If left blank, it is assumed PlantUML is not used or called during
+# a preprocessing step. Doxygen will generate a warning when it encounters a
+# \startuml command in this case and will not generate output for the diagram.
+
+PLANTUML_JAR_PATH      =
+
+# When using plantuml, the PLANTUML_CFG_FILE tag can be used to specify a
+# configuration file for plantuml.
+
+PLANTUML_CFG_FILE      =
+
+# When using plantuml, the specified paths are searched for files specified by
+# the !include statement in a plantuml block.
+
+PLANTUML_INCLUDE_PATH  =
+
+# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes
+# that will be shown in the graph. If the number of nodes in a graph becomes
+# larger than this value, doxygen will truncate the graph, which is visualized
+# by representing a node as a red box. Note that doxygen if the number of direct
+# children of the root node in a graph is already larger than
+# DOT_GRAPH_MAX_NODES then the graph will not be shown at all. Also note that
+# the size of a graph can be further restricted by MAX_DOT_GRAPH_DEPTH.
+# Minimum value: 0, maximum value: 10000, default value: 50.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_GRAPH_MAX_NODES    = 50
 
-# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the
-# graphs generated by dot. A depth value of 3 means that only nodes reachable
-# from the root by following a path via at most 3 edges will be shown. Nodes
-# that lay further from the root node will be omitted. Note that setting this
-# option to 1 or 2 may greatly reduce the computation time needed for large
-# code bases. Also note that the size of a graph can be further restricted by
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the graphs
+# generated by dot. A depth value of 3 means that only nodes reachable from the
+# root by following a path via at most 3 edges will be shown. Nodes that lay
+# further from the root node will be omitted. Note that setting this option to 1
+# or 2 may greatly reduce the computation time needed for large code bases. Also
+# note that the size of a graph can be further restricted by
 # DOT_GRAPH_MAX_NODES. Using a depth of 0 means no depth restriction.
+# Minimum value: 0, maximum value: 1000, default value: 0.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 MAX_DOT_GRAPH_DEPTH    = 0
 
-# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
-# background. This is disabled by default, because dot on Windows does not
-# seem to support this out of the box. Warning: Depending on the platform used,
-# enabling this option may lead to badly anti-aliased labels on the edges of
-# a graph (i.e. they become hard to read).
-
-DOT_TRANSPARENT        = NO
-
-# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output
+# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
 # files in one run (i.e. multiple -o and -T options on the command line). This
-# makes dot run faster, but since only newer versions of dot (>1.8.10)
-# support this, this feature is disabled by default.
+# makes dot run faster, but since only newer versions of dot (>1.8.10) support
+# this, this feature is disabled by default.
+# The default value is: NO.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_MULTI_TARGETS      = NO
 
-# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will
-# generate a legend page explaining the meaning of the various boxes and
-# arrows in the dot generated graphs.
+# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend page
+# explaining the meaning of the various boxes and arrows in the dot generated
+# graphs.
+# Note: This tag requires that UML_LOOK isn't set, i.e. the doxygen internal
+# graphical representation for inheritance and collaboration diagrams is used.
+# The default value is: YES.
+# This tag requires that the tag HAVE_DOT is set to YES.
 
 GENERATE_LEGEND        = YES
 
-# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will
-# remove the intermediate dot files that are used to generate
-# the various graphs.
+# If the DOT_CLEANUP tag is set to YES, doxygen will remove the intermediate
+# files that are used to generate the various graphs.
+#
+# Note: This setting is not only used for dot files but also for msc temporary
+# files.
+# The default value is: YES.
 
 DOT_CLEANUP            = YES
+
+# You can define message sequence charts within doxygen comments using the \msc
+# command. If the MSCGEN_TOOL tag is left empty (the default), then doxygen will
+# use a built-in version of mscgen tool to produce the charts. Alternatively,
+# the MSCGEN_TOOL tag can also specify the name an external tool. For instance,
+# specifying prog as the value, doxygen will call the tool as prog -T
+# <outfile_format> -o <outputfile> <inputfile>. The external tool should support
+# output file formats "png", "eps", "svg", and "ismap".
+
+MSCGEN_TOOL            =
+
+# The MSCFILE_DIRS tag can be used to specify one or more directories that
+# contain msc files that are included in the documentation (see the \mscfile
+# command).
+
+MSCFILE_DIRS           =
diff --git a/usr.sbin/unbound/edns-subnet/subnetmod.c b/usr.sbin/unbound/edns-subnet/subnetmod.c
index cefde84e5f4..1dff429ac8a 100644
--- a/usr.sbin/unbound/edns-subnet/subnetmod.c
+++ b/usr.sbin/unbound/edns-subnet/subnetmod.c
@@ -57,6 +57,9 @@
 #include "sldns/sbuffer.h"
 #include "sldns/wire2str.h"
 #include "iterator/iter_utils.h"
+#ifdef USE_CACHEDB
+#include "cachedb/cachedb.h"
+#endif
 
 /** externally called */
 void 
@@ -152,7 +155,7 @@ int ecs_whitelist_check(struct query_info* qinfo,
 
 	/* Cache by default, might be disabled after parsing EDNS option
 	 * received from nameserver. */
-	if(!iter_stub_fwd_no_cache(qstate, &qstate->qinfo, NULL, NULL)) {
+	if(!iter_stub_fwd_no_cache(qstate, &qstate->qinfo, NULL, NULL, NULL, 0)) {
 		qstate->no_cache_store = 0;
 	}
 
@@ -310,9 +313,18 @@ delfunc(void *envptr, void *elemptr) {
 static size_t
 sizefunc(void *elemptr) {
 	struct reply_info *elem  = (struct reply_info *)elemptr;
-	return sizeof (struct reply_info) - sizeof (struct rrset_ref)
+	size_t s = sizeof (struct reply_info) - sizeof (struct rrset_ref)
 		+ elem->rrset_count * sizeof (struct rrset_ref)
 		+ elem->rrset_count * sizeof (struct ub_packed_rrset_key *);
+	size_t i;
+	for (i = 0; i < elem->rrset_count; i++) {
+		struct ub_packed_rrset_key *key = elem->rrsets[i];
+		struct packed_rrset_data *data = key->entry.data;
+		s += ub_rrset_sizefunc(key, data);
+	}
+	if(elem->reason_bogus_str)
+		s += strlen(elem->reason_bogus_str)+1;
+	return s;
 }
 
 /**
@@ -352,7 +364,7 @@ update_cache(struct module_qstate *qstate, int id)
 	struct slabhash *subnet_msg_cache = sne->subnet_msg_cache;
 	struct ecs_data *edns = &sq->ecs_client_in;
 	size_t i;
-	int only_match_scope_zero;
+	int only_match_scope_zero, diff_size;
 
 	/* We already calculated hash upon lookup (lookup_and_reply) if we were
 	 * allowed to look in the ECS cache */
@@ -412,19 +424,25 @@ update_cache(struct module_qstate *qstate, int id)
 		rep->ref[i].id = rep->rrsets[i]->id;
 	}
 	reply_info_set_ttls(rep, *qstate->env->now);
+	reply_info_sortref(rep);
 	rep->flags |= (BIT_RA | BIT_QR); /* fix flags to be sensible for */
 	rep->flags &= ~(BIT_AA | BIT_CD);/* a reply based on the cache   */
 	if(edns->subnet_source_mask == 0 && edns->subnet_scope_mask == 0)
 		only_match_scope_zero = 1;
 	else only_match_scope_zero = 0;
+	diff_size = (int)tree->size_bytes;
 	addrtree_insert(tree, (addrkey_t*)edns->subnet_addr, 
 		edns->subnet_source_mask, sq->max_scope, rep,
 		rep->ttl, *qstate->env->now, only_match_scope_zero);
+	diff_size = (int)tree->size_bytes - diff_size;
 
 	lock_rw_unlock(&lru_entry->lock);
 	if (need_to_insert) {
 		slabhash_insert(subnet_msg_cache, h, lru_entry, lru_entry->data,
 			NULL);
+	} else {
+		slabhash_update_space_used(subnet_msg_cache, h, NULL,
+			diff_size);
 	}
 }
 
@@ -587,7 +605,21 @@ eval_response(struct module_qstate *qstate, int id, struct subnet_qstate *sq)
 	}
 	sne->num_msg_nocache++;
 	lock_rw_unlock(&sne->biglock);
-	
+
+	/* If there is an expired answer in the global cache, remove that,
+	 * because expired answers would otherwise resurface once the ecs data
+	 * expires, giving once in a while global data responses for ecs
+	 * domains, with serve expired enabled. */
+	if(qstate->env->cfg->serve_expired) {
+		msg_cache_remove(qstate->env, qstate->qinfo.qname,
+			qstate->qinfo.qname_len, qstate->qinfo.qtype,
+			qstate->qinfo.qclass, 0);
+#ifdef USE_CACHEDB
+		if(qstate->env->cachedb_enabled)
+			cachedb_msg_remove(qstate);
+#endif
+	}
+
 	if (sq->subnet_downstream) {
 		/* Client wants to see the answer, echo option back
 		 * and adjust the scope. */
diff --git a/usr.sbin/unbound/iterator/iter_fwd.c b/usr.sbin/unbound/iterator/iter_fwd.c
index c4b2411297e..b9d42553a8b 100644
--- a/usr.sbin/unbound/iterator/iter_fwd.c
+++ b/usr.sbin/unbound/iterator/iter_fwd.c
@@ -71,6 +71,7 @@ forwards_create(void)
 		sizeof(struct iter_forwards));
 	if(!fwd)
 		return NULL;
+	lock_rw_init(&fwd->lock);
 	return fwd;
 }
 
@@ -100,6 +101,7 @@ forwards_delete(struct iter_forwards* fwd)
 {
 	if(!fwd) 
 		return;
+	lock_rw_destroy(&fwd->lock);
 	fwd_del_tree(fwd);
 	free(fwd);
 }
@@ -332,45 +334,64 @@ make_stub_holes(struct iter_forwards* fwd, struct config_file* cfg)
 int 
 forwards_apply_cfg(struct iter_forwards* fwd, struct config_file* cfg)
 {
+	if(fwd->tree) {
+		lock_unprotect(&fwd->lock, fwd->tree);
+	}
 	fwd_del_tree(fwd);
 	fwd->tree = rbtree_create(fwd_cmp);
 	if(!fwd->tree)
 		return 0;
+	lock_protect(&fwd->lock, fwd->tree, sizeof(*fwd->tree));
 
+	lock_rw_wrlock(&fwd->lock);
 	/* read forward zones */
-	if(!read_forwards(fwd, cfg))
+	if(!read_forwards(fwd, cfg)) {
+		lock_rw_unlock(&fwd->lock);
 		return 0;
-	if(!make_stub_holes(fwd, cfg))
+	}
+	if(!make_stub_holes(fwd, cfg)) {
+		lock_rw_unlock(&fwd->lock);
 		return 0;
+	}
 	fwd_init_parents(fwd);
+	lock_rw_unlock(&fwd->lock);
 	return 1;
 }
 
 struct delegpt* 
-forwards_find(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass)
+forwards_find(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass,
+	int nolock)
 {
-	rbnode_type* res = NULL;
+	struct iter_forward_zone* res;
 	struct iter_forward_zone key;
+	int has_dp;
 	key.node.key = &key;
 	key.dclass = qclass;
 	key.name = qname;
 	key.namelabs = dname_count_size_labels(qname, &key.namelen);
-	res = rbtree_search(fwd->tree, &key);
-	if(res) return ((struct iter_forward_zone*)res)->dp;
-	return NULL;
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&fwd->lock); }
+	res = (struct iter_forward_zone*)rbtree_search(fwd->tree, &key);
+	has_dp = res && res->dp;
+	if(!has_dp && !nolock) { lock_rw_unlock(&fwd->lock); }
+	return has_dp?res->dp:NULL;
 }
 
 struct delegpt* 
-forwards_lookup(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass)
+forwards_lookup(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass,
+	int nolock)
 {
 	/* lookup the forward zone in the tree */
 	rbnode_type* res = NULL;
 	struct iter_forward_zone *result;
 	struct iter_forward_zone key;
+	int has_dp;
 	key.node.key = &key;
 	key.dclass = qclass;
 	key.name = qname;
 	key.namelabs = dname_count_size_labels(qname, &key.namelen);
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&fwd->lock); }
 	if(rbtree_find_less_equal(fwd->tree, &key, &res)) {
 		/* exact */
 		result = (struct iter_forward_zone*)res;
@@ -378,8 +399,10 @@ forwards_lookup(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass)
 		/* smaller element (or no element) */
 		int m;
 		result = (struct iter_forward_zone*)res;
-		if(!result || result->dclass != qclass)
+		if(!result || result->dclass != qclass) {
+			if(!nolock) { lock_rw_unlock(&fwd->lock); }
 			return NULL;
+		}
 		/* count number of labels matched */
 		(void)dname_lab_cmp(result->name, result->namelabs, key.name,
 			key.namelabs, &m);
@@ -389,20 +412,22 @@ forwards_lookup(struct iter_forwards* fwd, uint8_t* qname, uint16_t qclass)
 			result = result->parent;
 		}
 	}
-	if(result)
-		return result->dp;
-	return NULL;
+	has_dp = result && result->dp;
+	if(!has_dp && !nolock) { lock_rw_unlock(&fwd->lock); }
+	return has_dp?result->dp:NULL;
 }
 
 struct delegpt* 
-forwards_lookup_root(struct iter_forwards* fwd, uint16_t qclass)
+forwards_lookup_root(struct iter_forwards* fwd, uint16_t qclass, int nolock)
 {
 	uint8_t root = 0;
-	return forwards_lookup(fwd, &root, qclass);
+	return forwards_lookup(fwd, &root, qclass, nolock);
 }
 
-int
-forwards_next_root(struct iter_forwards* fwd, uint16_t* dclass)
+/* Finds next root item in forwards lookup tree.
+ * Caller needs to handle locking of the forwards structure. */
+static int
+next_root_locked(struct iter_forwards* fwd, uint16_t* dclass)
 {
 	struct iter_forward_zone key;
 	rbnode_type* n;
@@ -419,7 +444,7 @@ forwards_next_root(struct iter_forwards* fwd, uint16_t* dclass)
 		}
 		/* root not first item? search for higher items */
 		*dclass = p->dclass + 1;
-		return forwards_next_root(fwd, dclass);
+		return next_root_locked(fwd, dclass);
 	}
 	/* find class n in tree, we may get a direct hit, or if we don't
 	 * this is the last item of the previous class so rbtree_next() takes
@@ -447,10 +472,21 @@ forwards_next_root(struct iter_forwards* fwd, uint16_t* dclass)
 		}
 		/* not a root node, return next higher item */
 		*dclass = p->dclass+1;
-		return forwards_next_root(fwd, dclass);
+		return next_root_locked(fwd, dclass);
 	}
 }
 
+int
+forwards_next_root(struct iter_forwards* fwd, uint16_t* dclass, int nolock)
+{
+	int ret;
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&fwd->lock); }
+	ret = next_root_locked(fwd, dclass);
+	if(!nolock) { lock_rw_unlock(&fwd->lock); }
+	return ret;
+}
+
 size_t 
 forwards_get_mem(struct iter_forwards* fwd)
 {
@@ -458,10 +494,12 @@ forwards_get_mem(struct iter_forwards* fwd)
 	size_t s;
 	if(!fwd)
 		return 0;
+	lock_rw_rdlock(&fwd->lock);
 	s = sizeof(*fwd) + sizeof(*fwd->tree);
 	RBTREE_FOR(p, struct iter_forward_zone*, fwd->tree) {
 		s += sizeof(*p) + p->namelen + delegpt_get_mem(p->dp);
 	}
+	lock_rw_unlock(&fwd->lock);
 	return s;
 }
 
@@ -477,49 +515,78 @@ fwd_zone_find(struct iter_forwards* fwd, uint16_t c, uint8_t* nm)
 }
 
 int 
-forwards_add_zone(struct iter_forwards* fwd, uint16_t c, struct delegpt* dp)
+forwards_add_zone(struct iter_forwards* fwd, uint16_t c, struct delegpt* dp,
+	int nolock)
 {
 	struct iter_forward_zone *z;
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&fwd->lock); }
 	if((z=fwd_zone_find(fwd, c, dp->name)) != NULL) {
 		(void)rbtree_delete(fwd->tree, &z->node);
 		fwd_zone_free(z);
 	}
-	if(!forwards_insert(fwd, c, dp))
+	if(!forwards_insert(fwd, c, dp)) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
 		return 0;
+	}
 	fwd_init_parents(fwd);
+	if(!nolock) { lock_rw_unlock(&fwd->lock); }
 	return 1;
 }
 
 void 
-forwards_delete_zone(struct iter_forwards* fwd, uint16_t c, uint8_t* nm)
+forwards_delete_zone(struct iter_forwards* fwd, uint16_t c, uint8_t* nm,
+	int nolock)
 {
 	struct iter_forward_zone *z;
-	if(!(z=fwd_zone_find(fwd, c, nm)))
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&fwd->lock); }
+	if(!(z=fwd_zone_find(fwd, c, nm))) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
 		return; /* nothing to do */
+	}
 	(void)rbtree_delete(fwd->tree, &z->node);
 	fwd_zone_free(z);
 	fwd_init_parents(fwd);
+	if(!nolock) { lock_rw_unlock(&fwd->lock); }
 }
 
 int
-forwards_add_stub_hole(struct iter_forwards* fwd, uint16_t c, uint8_t* nm)
+forwards_add_stub_hole(struct iter_forwards* fwd, uint16_t c, uint8_t* nm,
+	int nolock)
 {
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&fwd->lock); }
+	if(fwd_zone_find(fwd, c, nm) != NULL) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
+		return 1; /* already a stub zone there */
+	}
 	if(!fwd_add_stub_hole(fwd, c, nm)) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
 		return 0;
 	}
 	fwd_init_parents(fwd);
+	if(!nolock) { lock_rw_unlock(&fwd->lock); }
 	return 1;
 }
 
 void
-forwards_delete_stub_hole(struct iter_forwards* fwd, uint16_t c, uint8_t* nm)
+forwards_delete_stub_hole(struct iter_forwards* fwd, uint16_t c,
+	uint8_t* nm, int nolock)
 {
 	struct iter_forward_zone *z;
-	if(!(z=fwd_zone_find(fwd, c, nm)))
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&fwd->lock); }
+	if(!(z=fwd_zone_find(fwd, c, nm))) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
 		return; /* nothing to do */
-	if(z->dp != NULL)
+	}
+	if(z->dp != NULL) {
+		if(!nolock) { lock_rw_unlock(&fwd->lock); }
 		return; /* not a stub hole */
+	}
 	(void)rbtree_delete(fwd->tree, &z->node);
 	fwd_zone_free(z);
 	fwd_init_parents(fwd);
+	if(!nolock) { lock_rw_unlock(&fwd->lock); }
 }
diff --git a/usr.sbin/unbound/iterator/iter_fwd.h b/usr.sbin/unbound/iterator/iter_fwd.h
index e90b74c16a5..4527d899c79 100644
--- a/usr.sbin/unbound/iterator/iter_fwd.h
+++ b/usr.sbin/unbound/iterator/iter_fwd.h
@@ -43,6 +43,7 @@
 #ifndef ITERATOR_ITER_FWD_H
 #define ITERATOR_ITER_FWD_H
 #include "util/rbtree.h"
+#include "util/locks.h"
 struct config_file;
 struct delegpt;
 
@@ -50,6 +51,11 @@ struct delegpt;
  * Iterator forward zones structure
  */
 struct iter_forwards {
+	/** lock on the forwards tree.
+	 * When grabbing both this lock and the anchors.lock, this lock
+	 * is grabbed first. When grabbing both this lock and the hints.lock
+	 * this lock is grabbed first. */
+	lock_rw_type lock;
 	/** 
 	 * Zones are stored in this tree. Sort order is specially chosen.
 	 * first sorted on qclass. Then on dname in nsec-like order, so that
@@ -106,47 +112,65 @@ int forwards_apply_cfg(struct iter_forwards* fwd, struct config_file* cfg);
 
 /**
  * Find forward zone exactly by name
+ * The return value is contents of the forwards structure.
+ * Caller should lock and unlock a readlock on the forwards structure if nolock
+ * is set.
+ * Otherwise caller should unlock the readlock on the forwards structure if a
+ * value was returned.
  * @param fwd: forward storage.
  * @param qname: The qname of the query.
  * @param qclass: The qclass of the query.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return: A delegation point or null.
  */
 struct delegpt* forwards_find(struct iter_forwards* fwd, uint8_t* qname,
-	uint16_t qclass);
+	uint16_t qclass, int nolock);
 
 /**
  * Find forward zone information
  * For this qname/qclass find forward zone information, returns delegation
  * point with server names and addresses, or NULL if no forwarding is needed.
+ * The return value is contents of the forwards structure.
+ * Caller should lock and unlock a readlock on the forwards structure if nolock
+ * is set.
+ * Otherwise caller should unlock the readlock on the forwards structure if a
+ * value was returned.
  *
  * @param fwd: forward storage.
  * @param qname: The qname of the query.
  * @param qclass: The qclass of the query.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return: A delegation point if the query has to be forwarded to that list,
  *         otherwise null.
  */
-struct delegpt* forwards_lookup(struct iter_forwards* fwd, 
-	uint8_t* qname, uint16_t qclass);
+struct delegpt* forwards_lookup(struct iter_forwards* fwd,
+	uint8_t* qname, uint16_t qclass, int nolock);
 
 /**
  * Same as forwards_lookup, but for the root only
  * @param fwd: forward storage.
  * @param qclass: The qclass of the query.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return: A delegation point if root forward exists, otherwise null.
  */
-struct delegpt* forwards_lookup_root(struct iter_forwards* fwd, 
-	uint16_t qclass);
+struct delegpt* forwards_lookup_root(struct iter_forwards* fwd,
+	uint16_t qclass, int nolock);
 
 /**
  * Find next root item in forwards lookup tree.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a readlock on the forwards structure.
  * @param fwd: the forward storage
  * @param qclass: class to look at next, or higher.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return false if none found, or if true stored in qclass.
  */
-int forwards_next_root(struct iter_forwards* fwd, uint16_t* qclass);
+int forwards_next_root(struct iter_forwards* fwd, uint16_t* qclass,
+	int nolock);
 
 /**
  * Get memory in use by forward storage
+ * Locks and unlocks the structure.
  * @param fwd: forward storage.
  * @return bytes in use
  */
@@ -158,42 +182,56 @@ int fwd_cmp(const void* k1, const void* k2);
 /**
  * Add zone to forward structure. For external use since it recalcs 
  * the tree parents.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the forwards structure.
  * @param fwd: the forward data structure
  * @param c: class of zone
  * @param dp: delegation point with name and target nameservers for new
  *	forward zone. malloced.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return false on failure (out of memory);
  */
-int forwards_add_zone(struct iter_forwards* fwd, uint16_t c, 
-	struct delegpt* dp);
+int forwards_add_zone(struct iter_forwards* fwd, uint16_t c,
+	struct delegpt* dp, int nolock);
 
 /**
  * Remove zone from forward structure. For external use since it 
  * recalcs the tree parents.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the forwards structure.
  * @param fwd: the forward data structure
  * @param c: class of zone
  * @param nm: name of zone (in uncompressed wireformat).
+ * @param nolock: Skip locking, locking is handled by the caller.
  */
-void forwards_delete_zone(struct iter_forwards* fwd, uint16_t c, uint8_t* nm);
+void forwards_delete_zone(struct iter_forwards* fwd, uint16_t c,
+	uint8_t* nm, int nolock);
 
 /**
  * Add stub hole (empty entry in forward table, that makes resolution skip
  * a forward-zone because the stub zone should override the forward zone).
  * Does not add one if not necessary.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the forwards structure.
  * @param fwd: the forward data structure
  * @param c: class of zone
  * @param nm: name of zone (in uncompressed wireformat).
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return false on failure (out of memory);
  */
-int forwards_add_stub_hole(struct iter_forwards* fwd, uint16_t c, uint8_t* nm);
+int forwards_add_stub_hole(struct iter_forwards* fwd, uint16_t c,
+	uint8_t* nm, int nolock);
 
 /**
  * Remove stub hole, if one exists.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the forwards structure.
  * @param fwd: the forward data structure
  * @param c: class of zone
  * @param nm: name of zone (in uncompressed wireformat).
+ * @param nolock: Skip locking, locking is handled by the caller.
  */
 void forwards_delete_stub_hole(struct iter_forwards* fwd, uint16_t c,
-	uint8_t* nm);
+	uint8_t* nm, int nolock);
 
 #endif /* ITERATOR_ITER_FWD_H */
diff --git a/usr.sbin/unbound/iterator/iter_hints.c b/usr.sbin/unbound/iterator/iter_hints.c
index 4f86f3676a2..8b168271c7f 100644
--- a/usr.sbin/unbound/iterator/iter_hints.c
+++ b/usr.sbin/unbound/iterator/iter_hints.c
@@ -57,6 +57,8 @@ hints_create(void)
 		sizeof(struct iter_hints));
 	if(!hints)
 		return NULL;
+	lock_rw_init(&hints->lock);
+	lock_protect(&hints->lock, &hints->tree, sizeof(hints->tree));
 	return hints;
 }
 
@@ -83,6 +85,7 @@ hints_delete(struct iter_hints* hints)
 {
 	if(!hints) 
 		return;
+	lock_rw_destroy(&hints->lock);
 	hints_del_tree(hints);
 	free(hints);
 }
@@ -438,47 +441,70 @@ read_root_hints_list(struct iter_hints* hints, struct config_file* cfg)
 int 
 hints_apply_cfg(struct iter_hints* hints, struct config_file* cfg)
 {
+	int nolock = 1;
+	lock_rw_wrlock(&hints->lock);
 	hints_del_tree(hints);
 	name_tree_init(&hints->tree);
-	
+
 	/* read root hints */
-	if(!read_root_hints_list(hints, cfg))
+	if(!read_root_hints_list(hints, cfg)) {
+		lock_rw_unlock(&hints->lock);
 		return 0;
+	}
 
 	/* read stub hints */
-	if(!read_stubs(hints, cfg))
+	if(!read_stubs(hints, cfg)) {
+		lock_rw_unlock(&hints->lock);
 		return 0;
+	}
 
 	/* use fallback compiletime root hints */
-	if(!hints_lookup_root(hints, LDNS_RR_CLASS_IN)) {
+	if(!hints_find_root(hints, LDNS_RR_CLASS_IN, nolock)) {
 		struct delegpt* dp = compile_time_root_prime(cfg->do_ip4,
 			cfg->do_ip6);
 		verbose(VERB_ALGO, "no config, using builtin root hints.");
-		if(!dp) 
+		if(!dp) {
+			lock_rw_unlock(&hints->lock);
 			return 0;
-		if(!hints_insert(hints, LDNS_RR_CLASS_IN, dp, 0))
+		}
+		if(!hints_insert(hints, LDNS_RR_CLASS_IN, dp, 0)) {
+			lock_rw_unlock(&hints->lock);
 			return 0;
+		}
 	}
 
 	name_tree_init_parents(&hints->tree);
+	lock_rw_unlock(&hints->lock);
 	return 1;
 }
 
-struct delegpt* 
-hints_lookup_root(struct iter_hints* hints, uint16_t qclass)
+struct delegpt*
+hints_find(struct iter_hints* hints, uint8_t* qname, uint16_t qclass,
+	int nolock)
 {
-	uint8_t rootlab = 0;
 	struct iter_hints_stub *stub;
+	size_t len;
+	int has_dp;
+	int labs = dname_count_size_labels(qname, &len);
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&hints->lock); }
 	stub = (struct iter_hints_stub*)name_tree_find(&hints->tree,
-		&rootlab, 1, 1, qclass);
-	if(!stub)
-		return NULL;
-	return stub->dp;
+		qname, len, labs, qclass);
+	has_dp = stub && stub->dp;
+	if(!has_dp && !nolock) { lock_rw_unlock(&hints->lock); }
+	return has_dp?stub->dp:NULL;
+}
+
+struct delegpt*
+hints_find_root(struct iter_hints* hints, uint16_t qclass, int nolock)
+{
+	uint8_t rootlab = 0;
+	return hints_find(hints, &rootlab, qclass, nolock);
 }
 
 struct iter_hints_stub* 
-hints_lookup_stub(struct iter_hints* hints, uint8_t* qname, 
-	uint16_t qclass, struct delegpt* cache_dp)
+hints_lookup_stub(struct iter_hints* hints, uint8_t* qname,
+	uint16_t qclass, struct delegpt* cache_dp, int nolock)
 {
 	size_t len;
 	int labs;
@@ -486,14 +512,20 @@ hints_lookup_stub(struct iter_hints* hints, uint8_t* qname,
 
 	/* first lookup the stub */
 	labs = dname_count_size_labels(qname, &len);
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&hints->lock); }
 	r = (struct iter_hints_stub*)name_tree_lookup(&hints->tree, qname,
 		len, labs, qclass);
-	if(!r) return NULL;
+	if(!r) {
+		if(!nolock) { lock_rw_unlock(&hints->lock); }
+		return NULL;
+	}
 
 	/* If there is no cache (root prime situation) */
 	if(cache_dp == NULL) {
 		if(r->dp->namelabs != 1)
 			return r; /* no cache dp, use any non-root stub */
+		if(!nolock) { lock_rw_unlock(&hints->lock); }
 		return NULL;
 	}
 
@@ -510,12 +542,18 @@ hints_lookup_stub(struct iter_hints* hints, uint8_t* qname,
 	if(dname_strict_subdomain(r->dp->name, r->dp->namelabs,
 		cache_dp->name, cache_dp->namelabs))
 		return r; /* need to prime this stub */
+	if(!nolock) { lock_rw_unlock(&hints->lock); }
 	return NULL;
 }
 
-int hints_next_root(struct iter_hints* hints, uint16_t* qclass)
+int hints_next_root(struct iter_hints* hints, uint16_t* qclass, int nolock)
 {
-	return name_tree_next_root(&hints->tree, qclass);
+	int ret;
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_rdlock(&hints->lock); }
+	ret = name_tree_next_root(&hints->tree, qclass);
+	if(!nolock) { lock_rw_unlock(&hints->lock); }
+	return ret;
 }
 
 size_t 
@@ -524,39 +562,52 @@ hints_get_mem(struct iter_hints* hints)
 	size_t s;
 	struct iter_hints_stub* p;
 	if(!hints) return 0;
+	lock_rw_rdlock(&hints->lock);
 	s = sizeof(*hints);
 	RBTREE_FOR(p, struct iter_hints_stub*, &hints->tree) {
 		s += sizeof(*p) + delegpt_get_mem(p->dp);
 	}
+	lock_rw_unlock(&hints->lock);
 	return s;
 }
 
 int 
 hints_add_stub(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
-	int noprime)
+	int noprime, int nolock)
 {
 	struct iter_hints_stub *z;
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&hints->lock); }
 	if((z=(struct iter_hints_stub*)name_tree_find(&hints->tree,
 		dp->name, dp->namelen, dp->namelabs, c)) != NULL) {
 		(void)rbtree_delete(&hints->tree, &z->node);
 		hints_stub_free(z);
 	}
-	if(!hints_insert(hints, c, dp, noprime))
+	if(!hints_insert(hints, c, dp, noprime)) {
+		if(!nolock) { lock_rw_unlock(&hints->lock); }
 		return 0;
+	}
 	name_tree_init_parents(&hints->tree);
+	if(!nolock) { lock_rw_unlock(&hints->lock); }
 	return 1;
 }
 
 void 
-hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm)
+hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm,
+	int nolock)
 {
 	struct iter_hints_stub *z;
 	size_t len;
 	int labs = dname_count_size_labels(nm, &len);
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(!nolock) { lock_rw_wrlock(&hints->lock); }
 	if(!(z=(struct iter_hints_stub*)name_tree_find(&hints->tree,
-		nm, len, labs, c)))
+		nm, len, labs, c))) {
+		if(!nolock) { lock_rw_unlock(&hints->lock); }
 		return; /* nothing to do */
+	}
 	(void)rbtree_delete(&hints->tree, &z->node);
 	hints_stub_free(z);
 	name_tree_init_parents(&hints->tree);
+	if(!nolock) { lock_rw_unlock(&hints->lock); }
 }
diff --git a/usr.sbin/unbound/iterator/iter_hints.h b/usr.sbin/unbound/iterator/iter_hints.h
index 06b4b9667d1..26de323c9e9 100644
--- a/usr.sbin/unbound/iterator/iter_hints.h
+++ b/usr.sbin/unbound/iterator/iter_hints.h
@@ -43,6 +43,7 @@
 #ifndef ITERATOR_ITER_HINTS_H
 #define ITERATOR_ITER_HINTS_H
 #include "util/storage/dnstree.h"
+#include "util/locks.h"
 struct iter_env;
 struct config_file;
 struct delegpt;
@@ -51,6 +52,10 @@ struct delegpt;
  * Iterator hints structure
  */
 struct iter_hints {
+	/** lock on the forwards tree.
+	 * When grabbing both this lock and the anchors.lock, this lock
+	 * is grabbed first. */
+	lock_rw_type lock;
 	/** 
 	 * Hints are stored in this tree. Sort order is specially chosen.
 	 * first sorted on qclass. Then on dname in nsec-like order, so that
@@ -95,42 +100,70 @@ void hints_delete(struct iter_hints* hints);
 int hints_apply_cfg(struct iter_hints* hints, struct config_file* cfg);
 
 /**
- * Find root hints for the given class.
+ * Find hints for the given class.
+ * The return value is contents of the hints structure.
+ * Caller should lock and unlock a readlock on the hints structure if nolock
+ * is set.
+ * Otherwise caller should unlock the readlock on the hints structure if a
+ * value was returned.
  * @param hints: hint storage.
+ * @param qname: the qname that generated the delegation point.
  * @param qclass: class for which root hints are requested. host order.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return: NULL if no hints, or a ptr to stored hints.
  */
-struct delegpt* hints_lookup_root(struct iter_hints* hints, uint16_t qclass);
+struct delegpt* hints_find(struct iter_hints* hints, uint8_t* qname,
+	uint16_t qclass, int nolock);
+
+/**
+ * Same as hints_lookup, but for the root only.
+ * @param hints: hint storage.
+ * @param qclass: class for which root hints are requested. host order.
+ * @param nolock: Skip locking, locking is handled by the caller.
+ * @return: NULL if no hints, or a ptr to stored hints.
+ */
+struct delegpt* hints_find_root(struct iter_hints* hints,
+	uint16_t qclass, int nolock);
 
 /**
  * Find next root hints (to cycle through all root hints).
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a readlock on the hints structure.
  * @param hints: hint storage
  * @param qclass: class for which root hints are sought.
  * 	0 means give the first available root hints class.
  * 	x means, give class x or a higher class if any.
  * 	returns the found class in this variable.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return true if a root hint class is found.
  * 	false if not root hint class is found (qclass may have been changed).
  */
-int hints_next_root(struct iter_hints* hints, uint16_t* qclass);
+int hints_next_root(struct iter_hints* hints, uint16_t* qclass, int nolock);
 
 /**
  * Given a qname/qclass combination, and the delegation point from the cache
  * for this qname/qclass, determine if this combination indicates that a
  * stub hint exists and must be primed.
+ * The return value is contents of the hints structure.
+ * Caller should lock and unlock a readlock on the hints structure if nolock
+ * is set.
+ * Otherwise caller should unlock the readlock on the hints structure if a
+ * value was returned.
  *
  * @param hints: hint storage.
  * @param qname: The qname that generated the delegation point.
  * @param qclass: The qclass that generated the delegation point.
  * @param dp: The cache generated delegation point.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return: A priming delegation point if there is a stub hint that must
  *         be primed, otherwise null.
  */
-struct iter_hints_stub* hints_lookup_stub(struct iter_hints* hints, 
-	uint8_t* qname, uint16_t qclass, struct delegpt* dp);
+struct iter_hints_stub* hints_lookup_stub(struct iter_hints* hints,
+	uint8_t* qname, uint16_t qclass, struct delegpt* dp, int nolock);
 
 /**
  * Get memory in use by hints
+ * Locks and unlocks the structure.
  * @param hints: hint storage.
  * @return bytes in use
  */
@@ -139,23 +172,30 @@ size_t hints_get_mem(struct iter_hints* hints);
 /**
  * Add stub to hints structure. For external use since it recalcs 
  * the tree parents.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the hints structure.
  * @param hints: the hints data structure
  * @param c: class of zone
  * @param dp: delegation point with name and target nameservers for new
  *	hints stub. malloced.
  * @param noprime: set noprime option to true or false on new hint stub.
+ * @param nolock: Skip locking, locking is handled by the caller.
  * @return false on failure (out of memory);
  */
 int hints_add_stub(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
-	int noprime);
+	int noprime, int nolock);
 
 /**
  * Remove stub from hints structure. For external use since it 
  * recalcs the tree parents.
+ * Handles its own locking unless nolock is set. In that case the caller
+ * should lock and unlock a writelock on the hints structure.
  * @param hints: the hints data structure
  * @param c: class of stub zone
  * @param nm: name of stub zone (in uncompressed wireformat).
+ * @param nolock: Skip locking, locking is handled by the caller.
  */
-void hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm);
+void hints_delete_stub(struct iter_hints* hints, uint16_t c,
+	uint8_t* nm, int nolock);
 
 #endif /* ITERATOR_ITER_HINTS_H */
diff --git a/usr.sbin/unbound/iterator/iter_utils.c b/usr.sbin/unbound/iterator/iter_utils.c
index 10a8ec3eb08..f291178d231 100644
--- a/usr.sbin/unbound/iterator/iter_utils.c
+++ b/usr.sbin/unbound/iterator/iter_utils.c
@@ -1284,8 +1284,17 @@ iter_get_next_root(struct iter_hints* hints, struct iter_forwards* fwd,
 	uint16_t* c)
 {
 	uint16_t c1 = *c, c2 = *c;
-	int r1 = hints_next_root(hints, &c1);
-	int r2 = forwards_next_root(fwd, &c2);
+	int r1, r2;
+	int nolock = 1;
+
+	/* prelock both forwards and hints for atomic read. */
+	lock_rw_rdlock(&fwd->lock);
+	lock_rw_rdlock(&hints->lock);
+	r1 = hints_next_root(hints, &c1, nolock);
+	r2 = forwards_next_root(fwd, &c2, nolock);
+	lock_rw_unlock(&fwd->lock);
+	lock_rw_unlock(&hints->lock);
+
 	if(!r1 && !r2) /* got none, end of list */
 		return 0;
 	else if(!r1) /* got one, return that */
@@ -1450,15 +1459,21 @@ int iter_dp_cangodown(struct query_info* qinfo, struct delegpt* dp)
 
 int
 iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,
-	uint8_t** retdpname, size_t* retdpnamelen)
+	uint8_t** retdpname, size_t* retdpnamelen, uint8_t* dpname_storage,
+	size_t dpname_storage_len)
 {
 	struct iter_hints_stub *stub;
 	struct delegpt *dp;
+	int nolock = 1;
 
 	/* Check for stub. */
+	/* Lock both forwards and hints for atomic read. */
+	lock_rw_rdlock(&qstate->env->fwds->lock);
+	lock_rw_rdlock(&qstate->env->hints->lock);
 	stub = hints_lookup_stub(qstate->env->hints, qinf->qname,
-	    qinf->qclass, NULL);
-	dp = forwards_lookup(qstate->env->fwds, qinf->qname, qinf->qclass);
+	    qinf->qclass, NULL, nolock);
+	dp = forwards_lookup(qstate->env->fwds, qinf->qname, qinf->qclass,
+		nolock);
 
 	/* see if forward or stub is more pertinent */
 	if(stub && stub->dp && dp) {
@@ -1472,7 +1487,9 @@ iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,
 
 	/* check stub */
 	if (stub != NULL && stub->dp != NULL) {
-		if(stub->dp->no_cache) {
+		int stub_no_cache = stub->dp->no_cache;
+		lock_rw_unlock(&qstate->env->fwds->lock);
+		if(stub_no_cache) {
 			char qname[255+1];
 			char dpname[255+1];
 			dname_str(qinf->qname, qname);
@@ -1480,15 +1497,27 @@ iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,
 			verbose(VERB_ALGO, "stub for %s %s has no_cache", qname, dpname);
 		}
 		if(retdpname) {
-			*retdpname = stub->dp->name;
+			if(stub->dp->namelen > dpname_storage_len) {
+				verbose(VERB_ALGO, "no cache stub dpname too long");
+				lock_rw_unlock(&qstate->env->hints->lock);
+				*retdpname = NULL;
+				*retdpnamelen = 0;
+				return stub_no_cache;
+			}
+			memmove(dpname_storage, stub->dp->name,
+				stub->dp->namelen);
+			*retdpname = dpname_storage;
 			*retdpnamelen = stub->dp->namelen;
 		}
-		return (stub->dp->no_cache);
+		lock_rw_unlock(&qstate->env->hints->lock);
+		return stub_no_cache;
 	}
 
 	/* Check for forward. */
 	if (dp) {
-		if(dp->no_cache) {
+		int dp_no_cache = dp->no_cache;
+		lock_rw_unlock(&qstate->env->hints->lock);
+		if(dp_no_cache) {
 			char qname[255+1];
 			char dpname[255+1];
 			dname_str(qinf->qname, qname);
@@ -1496,11 +1525,22 @@ iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,
 			verbose(VERB_ALGO, "forward for %s %s has no_cache", qname, dpname);
 		}
 		if(retdpname) {
-			*retdpname = dp->name;
+			if(dp->namelen > dpname_storage_len) {
+				verbose(VERB_ALGO, "no cache dpname too long");
+				lock_rw_unlock(&qstate->env->fwds->lock);
+				*retdpname = NULL;
+				*retdpnamelen = 0;
+				return dp_no_cache;
+			}
+			memmove(dpname_storage, dp->name, dp->namelen);
+			*retdpname = dpname_storage;
 			*retdpnamelen = dp->namelen;
 		}
-		return (dp->no_cache);
+		lock_rw_unlock(&qstate->env->fwds->lock);
+		return dp_no_cache;
 	}
+	lock_rw_unlock(&qstate->env->fwds->lock);
+	lock_rw_unlock(&qstate->env->hints->lock);
 	if(retdpname) {
 		*retdpname = NULL;
 		*retdpnamelen = 0;
diff --git a/usr.sbin/unbound/iterator/iter_utils.h b/usr.sbin/unbound/iterator/iter_utils.h
index fa860fa682f..4024629e686 100644
--- a/usr.sbin/unbound/iterator/iter_utils.h
+++ b/usr.sbin/unbound/iterator/iter_utils.h
@@ -407,10 +407,14 @@ int iter_dp_cangodown(struct query_info* qinfo, struct delegpt* dp);
  * 	Used for NXDOMAIN checks, above that it is an nxdomain from a
  * 	different server and zone. You can pass NULL to not get it.
  * @param retdpnamelen: returns the length of the dpname.
+ * @param dpname_storage: this is where the dpname buf is stored, if any.
+ * 	So that caller can manage the buffer.
+ * @param dpname_storage_len: size of dpname_storage buffer.
  * @return true if no_cache is set in stub or fwd.
  */
 int iter_stub_fwd_no_cache(struct module_qstate *qstate,
-	struct query_info *qinf, uint8_t** retdpname, size_t* retdpnamelen);
+	struct query_info *qinf, uint8_t** retdpname, size_t* retdpnamelen,
+	uint8_t* dpname_storage, size_t dpname_storage_len);
 
 /**
  * Set support for IP4 and IP6 depending on outgoing interfaces
diff --git a/usr.sbin/unbound/iterator/iterator.c b/usr.sbin/unbound/iterator/iterator.c
index e9fea544aa6..5732a414857 100644
--- a/usr.sbin/unbound/iterator/iterator.c
+++ b/usr.sbin/unbound/iterator/iterator.c
@@ -52,6 +52,7 @@
 #include "iterator/iter_priv.h"
 #include "validator/val_neg.h"
 #include "services/cache/dns.h"
+#include "services/cache/rrset.h"
 #include "services/cache/infra.h"
 #include "services/authzone.h"
 #include "util/module.h"
@@ -678,30 +679,40 @@ errinf_reply(struct module_qstate* qstate, struct iter_qstate* iq)
 
 /** see if last resort is possible - does config allow queries to parent */
 static int
-can_have_last_resort(struct module_env* env, uint8_t* nm, size_t nmlen,
-	uint16_t qclass, struct delegpt** retdp)
+can_have_last_resort(struct module_env* env, uint8_t* nm, size_t ATTR_UNUSED(nmlen),
+	uint16_t qclass, int* have_dp, struct delegpt** retdp,
+	struct regional* region)
 {
-	struct delegpt* fwddp;
-	struct iter_hints_stub* stub;
-	int labs = dname_count_labels(nm);
+	struct delegpt* dp = NULL;
+	int nolock = 0;
 	/* do not process a last resort (the parent side) if a stub
 	 * or forward is configured, because we do not want to go 'above'
 	 * the configured servers */
-	if(!dname_is_root(nm) && (stub = (struct iter_hints_stub*)
-		name_tree_find(&env->hints->tree, nm, nmlen, labs, qclass)) &&
+	if(!dname_is_root(nm) &&
+		(dp = hints_find(env->hints, nm, qclass, nolock)) &&
 		/* has_parent side is turned off for stub_first, where we
 		 * are allowed to go to the parent */
-		stub->dp->has_parent_side_NS) {
-		if(retdp) *retdp = stub->dp;
+		dp->has_parent_side_NS) {
+		if(retdp) *retdp = delegpt_copy(dp, region);
+		lock_rw_unlock(&env->hints->lock);
+		if(have_dp) *have_dp = 1;
 		return 0;
 	}
-	if((fwddp = forwards_find(env->fwds, nm, qclass)) &&
+	if(dp) {
+		lock_rw_unlock(&env->hints->lock);
+		dp = NULL;
+	}
+	if((dp = forwards_find(env->fwds, nm, qclass, nolock)) &&
 		/* has_parent_side is turned off for forward_first, where
 		 * we are allowed to go to the parent */
-		fwddp->has_parent_side_NS) {
-		if(retdp) *retdp = fwddp;
+		dp->has_parent_side_NS) {
+		if(retdp) *retdp = delegpt_copy(dp, region);
+		lock_rw_unlock(&env->fwds->lock);
+		if(have_dp) *have_dp = 1;
 		return 0;
 	}
+	/* lock_() calls are macros that could be nothing, surround in {} */
+	if(dp) { lock_rw_unlock(&env->fwds->lock); }
 	return 1;
 }
 
@@ -877,10 +888,11 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 {
 	struct delegpt* dp;
 	struct module_qstate* subq;
+	int nolock = 0;
 	verbose(VERB_DETAIL, "priming . %s NS", 
 		sldns_lookup_by_id(sldns_rr_classes, (int)qclass)?
 		sldns_lookup_by_id(sldns_rr_classes, (int)qclass)->name:"??");
-	dp = hints_lookup_root(qstate->env->hints, qclass);
+	dp = hints_find_root(qstate->env->hints, qclass, nolock);
 	if(!dp) {
 		verbose(VERB_ALGO, "Cannot prime due to lack of hints");
 		return 0;
@@ -890,6 +902,7 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 	if(!generate_sub_request((uint8_t*)"\000", 1, LDNS_RR_TYPE_NS, 
 		qclass, qstate, id, iq, QUERYTARGETS_STATE, PRIME_RESP_STATE,
 		&subq, 0, 0)) {
+		lock_rw_unlock(&qstate->env->hints->lock);
 		verbose(VERB_ALGO, "could not prime root");
 		return 0;
 	}
@@ -900,6 +913,7 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 		 * copy dp, it is now part of the root prime query. 
 		 * dp was part of in the fixed hints structure. */
 		subiq->dp = delegpt_copy(dp, subq->region);
+		lock_rw_unlock(&qstate->env->hints->lock);
 		if(!subiq->dp) {
 			log_err("out of memory priming root, copydp");
 			fptr_ok(fptr_whitelist_modenv_kill_sub(
@@ -911,6 +925,8 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 		subiq->num_target_queries = 0; 
 		subiq->dnssec_expected = iter_indicates_dnssec(
 			qstate->env, subiq->dp, NULL, subq->qinfo.qclass);
+	} else {
+		lock_rw_unlock(&qstate->env->hints->lock);
 	}
 	
 	/* this module stops, our submodule starts, and does the query. */
@@ -941,18 +957,21 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 	struct iter_hints_stub* stub;
 	struct delegpt* stub_dp;
 	struct module_qstate* subq;
+	int nolock = 0;
 
 	if(!qname) return 0;
-	stub = hints_lookup_stub(qstate->env->hints, qname, qclass, iq->dp);
+	stub = hints_lookup_stub(qstate->env->hints, qname, qclass, iq->dp,
+		nolock);
 	/* The stub (if there is one) does not need priming. */
-	if(!stub)
-		return 0;
+	if(!stub) return 0;
 	stub_dp = stub->dp;
 	/* if we have an auth_zone dp, and stub is equal, don't prime stub
 	 * yet, unless we want to fallback and avoid the auth_zone */
 	if(!iq->auth_zone_avoid && iq->dp && iq->dp->auth_dp && 
-		query_dname_compare(iq->dp->name, stub_dp->name) == 0)
+		query_dname_compare(iq->dp->name, stub_dp->name) == 0) {
+		lock_rw_unlock(&qstate->env->hints->lock);
 		return 0;
+	}
 
 	/* is it a noprime stub (always use) */
 	if(stub->noprime) {
@@ -961,13 +980,14 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 		/* copy the dp out of the fixed hints structure, so that
 		 * it can be changed when servicing this query */
 		iq->dp = delegpt_copy(stub_dp, qstate->region);
+		lock_rw_unlock(&qstate->env->hints->lock);
 		if(!iq->dp) {
 			log_err("out of memory priming stub");
 			errinf(qstate, "malloc failure, priming stub");
 			(void)error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 			return 1; /* return 1 to make module stop, with error */
 		}
-		log_nametypeclass(VERB_DETAIL, "use stub", stub_dp->name, 
+		log_nametypeclass(VERB_DETAIL, "use stub", iq->dp->name,
 			LDNS_RR_TYPE_NS, qclass);
 		return r;
 	}
@@ -981,6 +1001,7 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 	if(!generate_sub_request(stub_dp->name, stub_dp->namelen, 
 		LDNS_RR_TYPE_NS, qclass, qstate, id, iq,
 		QUERYTARGETS_STATE, PRIME_RESP_STATE, &subq, 0, 0)) {
+		lock_rw_unlock(&qstate->env->hints->lock);
 		verbose(VERB_ALGO, "could not prime stub");
 		errinf(qstate, "could not generate lookup for stub prime");
 		(void)error_response(qstate, id, LDNS_RCODE_SERVFAIL);
@@ -993,6 +1014,7 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 		/* Set the initial delegation point to the hint. */
 		/* make copy to avoid use of stub dp by different qs/threads */
 		subiq->dp = delegpt_copy(stub_dp, subq->region);
+		lock_rw_unlock(&qstate->env->hints->lock);
 		if(!subiq->dp) {
 			log_err("out of memory priming stub, copydp");
 			fptr_ok(fptr_whitelist_modenv_kill_sub(
@@ -1009,6 +1031,8 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq, int id,
 		subiq->wait_priming_stub = 1;
 		subiq->dnssec_expected = iter_indicates_dnssec(
 			qstate->env, subiq->dp, NULL, subq->qinfo.qclass);
+	} else {
+		lock_rw_unlock(&qstate->env->hints->lock);
 	}
 	
 	/* this module stops, our submodule starts, and does the query. */
@@ -1181,7 +1205,7 @@ generate_ns_check(struct module_qstate* qstate, struct iter_qstate* iq, int id)
 	if(iq->depth == ie->max_dependency_depth)
 		return;
 	if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen,
-		iq->qchase.qclass, NULL))
+		iq->qchase.qclass, NULL, NULL, NULL))
 		return;
 	/* is this query the same as the nscheck? */
 	if(qstate->qinfo.qtype == LDNS_RR_TYPE_NS &&
@@ -1294,6 +1318,7 @@ forward_request(struct module_qstate* qstate, struct iter_qstate* iq)
 	struct delegpt* dp;
 	uint8_t* delname = iq->qchase.qname;
 	size_t delnamelen = iq->qchase.qname_len;
+	int nolock = 0;
 	if(iq->refetch_glue && iq->dp) {
 		delname = iq->dp->name;
 		delnamelen = iq->dp->namelen;
@@ -1302,12 +1327,13 @@ forward_request(struct module_qstate* qstate, struct iter_qstate* iq)
 	if( (iq->qchase.qtype == LDNS_RR_TYPE_DS || iq->refetch_glue)
 		&& !dname_is_root(iq->qchase.qname))
 		dname_remove_label(&delname, &delnamelen);
-	dp = forwards_lookup(qstate->env->fwds, delname, iq->qchase.qclass);
-	if(!dp) 
-		return 0;
+	dp = forwards_lookup(qstate->env->fwds, delname, iq->qchase.qclass,
+		nolock);
+	if(!dp) return 0;
 	/* send recursion desired to forward addr */
 	iq->chase_flags |= BIT_RD; 
 	iq->dp = delegpt_copy(dp, qstate->region);
+	lock_rw_unlock(&qstate->env->fwds->lock);
 	/* iq->dp checked by caller */
 	verbose(VERB_ALGO, "forwarding request");
 	return 1;
@@ -1335,6 +1361,7 @@ static int
 processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 	struct iter_env* ie, int id)
 {
+	uint8_t dpname_storage[LDNS_MAX_DOMAINLEN+1];
 	uint8_t* delname, *dpname=NULL;
 	size_t delnamelen, dpnamelen=0;
 	struct dns_msg* msg = NULL;
@@ -1381,7 +1408,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 	if (iq->refetch_glue &&
 	        iq->dp &&
 	        !can_have_last_resort(qstate->env, iq->dp->name,
-	             iq->dp->namelen, iq->qchase.qclass, NULL)) {
+	             iq->dp->namelen, iq->qchase.qclass, NULL, NULL, NULL)) {
 	    iq->refetch_glue = 0;
 	}
 
@@ -1389,8 +1416,61 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 
 	/* This either results in a query restart (CNAME cache response), a
 	 * terminating response (ANSWER), or a cache miss (null). */
-	
-	if (iter_stub_fwd_no_cache(qstate, &iq->qchase, &dpname, &dpnamelen)) {
+
+	/* Check RPZ for override */
+	if(qstate->env->auth_zones) {
+		/* apply rpz qname triggers, like after cname */
+		struct dns_msg* forged_response =
+			rpz_callback_from_iterator_cname(qstate, iq);
+		if(forged_response) {
+			uint8_t* sname = 0;
+			size_t slen = 0;
+			int count = 0;
+			while(forged_response && reply_find_rrset_section_an(
+				forged_response->rep, iq->qchase.qname,
+				iq->qchase.qname_len, LDNS_RR_TYPE_CNAME,
+				iq->qchase.qclass) &&
+				iq->qchase.qtype != LDNS_RR_TYPE_CNAME &&
+				count++ < ie->max_query_restarts) {
+				/* another cname to follow */
+				if(!handle_cname_response(qstate, iq, forged_response,
+					&sname, &slen)) {
+					errinf(qstate, "malloc failure, CNAME info");
+					return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
+				}
+				iq->qchase.qname = sname;
+				iq->qchase.qname_len = slen;
+				forged_response =
+					rpz_callback_from_iterator_cname(qstate, iq);
+			}
+			if(forged_response != NULL) {
+				qstate->ext_state[id] = module_finished;
+				qstate->return_rcode = LDNS_RCODE_NOERROR;
+				qstate->return_msg = forged_response;
+				iq->response = forged_response;
+				next_state(iq, FINISHED_STATE);
+				if(!iter_prepend(iq, qstate->return_msg, qstate->region)) {
+					log_err("rpz: after cached cname, prepend rrsets: out of memory");
+					return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
+				}
+				qstate->return_msg->qinfo = qstate->qinfo;
+				return 0;
+			}
+			/* Follow the CNAME response */
+			iq->dp = NULL;
+			iq->refetch_glue = 0;
+			iq->query_restart_count++;
+			iq->sent_count = 0;
+			iq->dp_target_count = 0;
+			sock_list_insert(&qstate->reply_origin, NULL, 0, qstate->region);
+			if(qstate->env->cfg->qname_minimisation)
+				iq->minimisation_state = INIT_MINIMISE_STATE;
+			return next_state(iq, INIT_REQUEST_STATE);
+		}
+	}
+
+	if (iter_stub_fwd_no_cache(qstate, &iq->qchase, &dpname, &dpnamelen,
+		dpname_storage, sizeof(dpname_storage))) {
 		/* Asked to not query cache. */
 		verbose(VERB_ALGO, "no-cache set, going to the network");
 		qstate->no_cache_lookup = 1;
@@ -1449,39 +1529,6 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 			}
 			iq->qchase.qname = sname;
 			iq->qchase.qname_len = slen;
-			if(qstate->env->auth_zones) {
-				/* apply rpz qname triggers after cname */
-				struct dns_msg* forged_response =
-					rpz_callback_from_iterator_cname(qstate, iq);
-				while(forged_response && reply_find_rrset_section_an(
-					forged_response->rep, iq->qchase.qname,
-					iq->qchase.qname_len, LDNS_RR_TYPE_CNAME,
-					iq->qchase.qclass)) {
-					/* another cname to follow */
-					if(!handle_cname_response(qstate, iq, forged_response,
-						&sname, &slen)) {
-						errinf(qstate, "malloc failure, CNAME info");
-						return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
-					}
-					iq->qchase.qname = sname;
-					iq->qchase.qname_len = slen;
-					forged_response =
-						rpz_callback_from_iterator_cname(qstate, iq);
-				}
-				if(forged_response != NULL) {
-					qstate->ext_state[id] = module_finished;
-					qstate->return_rcode = LDNS_RCODE_NOERROR;
-					qstate->return_msg = forged_response;
-					iq->response = forged_response;
-					next_state(iq, FINISHED_STATE);
-					if(!iter_prepend(iq, qstate->return_msg, qstate->region)) {
-						log_err("rpz: after cached cname, prepend rrsets: out of memory");
-						return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
-					}
-					qstate->return_msg->qinfo = qstate->qinfo;
-					return 0;
-				}
-			}
 			/* This *is* a query restart, even if it is a cheap 
 			 * one. */
 			iq->dp = NULL;
@@ -1494,7 +1541,6 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 				iq->minimisation_state = INIT_MINIMISE_STATE;
 			return next_state(iq, INIT_REQUEST_STATE);
 		}
-
 		/* if from cache, NULL, else insert 'cache IP' len=0 */
 		if(qstate->reply_origin)
 			sock_list_insert(&qstate->reply_origin, NULL, 0, qstate->region);
@@ -1555,7 +1601,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 	if(iq->qchase.qtype == LDNS_RR_TYPE_DS || iq->refetch_glue ||
 	   (iq->qchase.qtype == LDNS_RR_TYPE_NS && qstate->prefetch_leeway
-	   && can_have_last_resort(qstate->env, delname, delnamelen, iq->qchase.qclass, NULL))) {
+	   && can_have_last_resort(qstate->env, delname, delnamelen, iq->qchase.qclass, NULL, NULL, NULL))) {
 		/* remove first label from delname, root goes to hints,
 		 * but only to fetch glue, not for qtype=DS. */
 		/* also when prefetching an NS record, fetch it again from
@@ -1584,6 +1630,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 		 * root priming situation. */
 		if(iq->dp == NULL) {
 			int r;
+			int nolock = 0;
 			/* if under auth zone, no prime needed */
 			if(!auth_zone_delegpt(qstate, iq, delname, delnamelen))
 				return error_response(qstate, id, 
@@ -1597,12 +1644,13 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 				break; /* got noprime-stub-zone, continue */
 			else if(r)
 				return 0; /* stub prime request made */
-			if(forwards_lookup_root(qstate->env->fwds, 
-				iq->qchase.qclass)) {
+			if(forwards_lookup_root(qstate->env->fwds,
+				iq->qchase.qclass, nolock)) {
+				lock_rw_unlock(&qstate->env->fwds->lock);
 				/* forward zone root, no root prime needed */
 				/* fill in some dp - safety belt */
-				iq->dp = hints_lookup_root(qstate->env->hints, 
-					iq->qchase.qclass);
+				iq->dp = hints_find_root(qstate->env->hints,
+					iq->qchase.qclass, nolock);
 				if(!iq->dp) {
 					log_err("internal error: no hints dp");
 					errinf(qstate, "no hints for this class");
@@ -1610,6 +1658,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 						LDNS_RCODE_SERVFAIL);
 				}
 				iq->dp = delegpt_copy(iq->dp, qstate->region);
+				lock_rw_unlock(&qstate->env->hints->lock);
 				if(!iq->dp) {
 					log_err("out of memory in safety belt");
 					errinf(qstate, "malloc failure, in safety belt");
@@ -1649,15 +1698,13 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 		if(iter_dp_is_useless(&qstate->qinfo, qstate->query_flags,
 			iq->dp, ie->supports_ipv4, ie->supports_ipv6,
 			ie->use_nat64)) {
-			struct delegpt* retdp = NULL;
-			if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen, iq->qchase.qclass, &retdp)) {
-				if(retdp) {
+			int have_dp = 0;
+			if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen, iq->qchase.qclass, &have_dp, &iq->dp, qstate->region)) {
+				if(have_dp) {
 					verbose(VERB_QUERY, "cache has stub "
 						"or fwd but no addresses, "
 						"fallback to config");
-					iq->dp = delegpt_copy(retdp,
-						qstate->region);
-					if(!iq->dp) {
+					if(have_dp && !iq->dp) {
 						log_err("out of memory in "
 							"stub/fwd fallback");
 						errinf(qstate, "malloc failure, for fallback to config");
@@ -1677,10 +1724,11 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 			}
 			if(dname_is_root(iq->dp->name)) {
 				/* use safety belt */
+				int nolock = 0;
 				verbose(VERB_QUERY, "Cache has root NS but "
 				"no addresses. Fallback to the safety belt.");
-				iq->dp = hints_lookup_root(qstate->env->hints, 
-					iq->qchase.qclass);
+				iq->dp = hints_find_root(qstate->env->hints,
+					iq->qchase.qclass, nolock);
 				/* note deleg_msg is from previous lookup,
 				 * but RD is on, so it is not used */
 				if(!iq->dp) {
@@ -1689,6 +1737,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 						LDNS_RCODE_REFUSED);
 				}
 				iq->dp = delegpt_copy(iq->dp, qstate->region);
+				lock_rw_unlock(&qstate->env->hints->lock);
 				if(!iq->dp) {
 					log_err("out of memory in safety belt");
 					errinf(qstate, "malloc failure, in safety belt, for root");
@@ -1744,6 +1793,7 @@ processInitRequest2(struct module_qstate* qstate, struct iter_qstate* iq,
 	delnamelen = iq->qchase.qname_len;
 	if(iq->refetch_glue) {
 		struct iter_hints_stub* stub;
+		int nolock = 0;
 		if(!iq->dp) {
 			log_err("internal or malloc fail: no dp for refetch");
 			errinf(qstate, "malloc failure, no delegation info");
@@ -1753,12 +1803,14 @@ processInitRequest2(struct module_qstate* qstate, struct iter_qstate* iq,
 		 * this is above stub without stub-first. */
 		stub = hints_lookup_stub(
 			qstate->env->hints, iq->qchase.qname, iq->qchase.qclass,
-			iq->dp);
+			iq->dp, nolock);
 		if(!stub || !stub->dp->has_parent_side_NS || 
 			dname_subdomain_c(iq->dp->name, stub->dp->name)) {
 			delname = iq->dp->name;
 			delnamelen = iq->dp->namelen;
 		}
+		/* lock_() calls are macros that could be nothing, surround in {} */
+		if(stub) { lock_rw_unlock(&qstate->env->hints->lock); }
 	}
 	if(iq->qchase.qtype == LDNS_RR_TYPE_DS || iq->refetch_glue) {
 		if(!dname_is_root(delname))
@@ -2062,7 +2114,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 	log_assert(iq->dp);
 
 	if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen,
-		iq->qchase.qclass, NULL)) {
+		iq->qchase.qclass, NULL, NULL, NULL)) {
 		/* fail -- no more targets, no more hope of targets, no hope 
 		 * of a response. */
 		errinf(qstate, "all the configured stub or forward servers failed,");
@@ -2072,21 +2124,24 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 		return error_response_cache(qstate, id, LDNS_RCODE_SERVFAIL);
 	}
 	if(!iq->dp->has_parent_side_NS && dname_is_root(iq->dp->name)) {
-		struct delegpt* p = hints_lookup_root(qstate->env->hints,
-			iq->qchase.qclass);
-		if(p) {
+		struct delegpt* dp;
+		int nolock = 0;
+		dp = hints_find_root(qstate->env->hints,
+			iq->qchase.qclass, nolock);
+		if(dp) {
 			struct delegpt_addr* a;
 			iq->chase_flags &= ~BIT_RD; /* go to authorities */
-			for(ns = p->nslist; ns; ns=ns->next) {
+			for(ns = dp->nslist; ns; ns=ns->next) {
 				(void)delegpt_add_ns(iq->dp, qstate->region,
 					ns->name, ns->lame, ns->tls_auth_name,
 					ns->port);
 			}
-			for(a = p->target_list; a; a=a->next_target) {
+			for(a = dp->target_list; a; a=a->next_target) {
 				(void)delegpt_add_addr(iq->dp, qstate->region,
 					&a->addr, a->addrlen, a->bogus,
 					a->lame, a->tls_auth_name, -1, NULL);
 			}
+			lock_rw_unlock(&qstate->env->hints->lock);
 		}
 		iq->dp->has_parent_side_NS = 1;
 	} else if(!iq->dp->has_parent_side_NS) {
@@ -2164,7 +2219,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 		if( ((ie->supports_ipv6 && !ns->done_pside6) ||
 		    ((ie->supports_ipv4 || ie->use_nat64) && !ns->done_pside4)) &&
 		    !can_have_last_resort(qstate->env, ns->name, ns->namelen,
-			iq->qchase.qclass, NULL)) {
+			iq->qchase.qclass, NULL, NULL, NULL)) {
 			log_nametypeclass(VERB_ALGO, "cannot pside lookup ns "
 				"because it is also a stub/forward,",
 				ns->name, LDNS_RR_TYPE_NS, iq->qchase.qclass);
@@ -2746,8 +2801,51 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	delegpt_add_unused_targets(iq->dp);
 
 	if(qstate->env->auth_zones) {
-		/* apply rpz triggers at query time */
+		uint8_t* sname = NULL;
+		size_t snamelen = 0;
+		/* apply rpz triggers at query time; nameserver IP and dname */
+		struct dns_msg* forged_response_after_cname;
 		struct dns_msg* forged_response = rpz_callback_from_iterator_module(qstate, iq);
+		int count = 0;
+		while(forged_response && reply_find_rrset_section_an(
+			forged_response->rep, iq->qchase.qname,
+			iq->qchase.qname_len, LDNS_RR_TYPE_CNAME,
+			iq->qchase.qclass) &&
+			iq->qchase.qtype != LDNS_RR_TYPE_CNAME &&
+			count++ < ie->max_query_restarts) {
+			/* another cname to follow */
+			if(!handle_cname_response(qstate, iq, forged_response,
+				&sname, &snamelen)) {
+				errinf(qstate, "malloc failure, CNAME info");
+				return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
+			}
+			iq->qchase.qname = sname;
+			iq->qchase.qname_len = snamelen;
+			forged_response_after_cname =
+				rpz_callback_from_iterator_cname(qstate, iq);
+			if(forged_response_after_cname) {
+				forged_response = forged_response_after_cname;
+			} else {
+				/* Follow the CNAME with a query restart */
+				iq->deleg_msg = NULL;
+				iq->dp = NULL;
+				iq->dsns_point = NULL;
+				iq->auth_zone_response = 0;
+				iq->refetch_glue = 0;
+				iq->query_restart_count++;
+				iq->sent_count = 0;
+				iq->dp_target_count = 0;
+				if(qstate->env->cfg->qname_minimisation)
+					iq->minimisation_state = INIT_MINIMISE_STATE;
+				outbound_list_clear(&iq->outlist);
+				iq->num_current_queries = 0;
+				fptr_ok(fptr_whitelist_modenv_detach_subs(
+					qstate->env->detach_subs));
+				(*qstate->env->detach_subs)(qstate);
+				iq->num_target_queries = 0;
+				return next_state(iq, INIT_REQUEST_STATE);
+			}
+		}
 		if(forged_response != NULL) {
 			qstate->ext_state[id] = module_finished;
 			qstate->return_rcode = LDNS_RCODE_NOERROR;
@@ -3082,7 +3180,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			/* DNAME to a subdomain loop; do not recurse */
 			type = RESPONSE_TYPE_ANSWER;
 		}
-	} else if(type == RESPONSE_TYPE_CNAME &&
+	}
+	if(type == RESPONSE_TYPE_CNAME &&
 		iq->qchase.qtype == LDNS_RR_TYPE_CNAME &&
 		iq->minimisation_state == MINIMISE_STATE &&
 		query_dname_compare(iq->qchase.qname, iq->qinfo_out.qname) == 0) {
@@ -3193,6 +3292,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 		}
 		return final_state(iq);
 	} else if(type == RESPONSE_TYPE_REFERRAL) {
+		struct delegpt* old_dp = NULL;
 		/* REFERRAL type responses get a reset of the 
 		 * delegation point, and back to the QUERYTARGETS_STATE. */
 		verbose(VERB_DETAIL, "query response was REFERRAL");
@@ -3244,6 +3344,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 		/* Reset the event state, setting the current delegation 
 		 * point to the referral. */
 		iq->deleg_msg = iq->response;
+		/* Keep current delegation point for label comparison */
+		old_dp = iq->dp;
 		iq->dp = delegpt_from_message(iq->response, qstate->region);
 		if (qstate->env->cfg->qname_minimisation)
 			iq->minimisation_state = INIT_MINIMISE_STATE;
@@ -3251,6 +3353,20 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			errinf(qstate, "malloc failure, for delegation point");
 			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 		}
+		if(old_dp->namelabs + 1 < iq->dp->namelabs) {
+			/* We got a grandchild delegation (more than one label
+			 * difference) than expected. Check for in-between
+			 * delegations in the cache and remove them.
+			 * They could prove problematic when they expire
+			 * and rrset_expired_above() encounters them during
+			 * delegation cache lookups. */
+			uint8_t* qname = iq->dp->name;
+			size_t qnamelen = iq->dp->namelen;
+			rrset_cache_remove_above(qstate->env->rrset_cache,
+				&qname, &qnamelen, LDNS_RR_TYPE_NS,
+				iq->qchase.qclass, *qstate->env->now,
+				old_dp->name, old_dp->namelen);
+		}
 		if(!cache_fill_missing(qstate->env, iq->qchase.qclass, 
 			qstate->region, iq->dp)) {
 			errinf(qstate, "malloc failure, copy extra info into delegation point");
@@ -3341,10 +3457,13 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			/* apply rpz qname triggers after cname */
 			struct dns_msg* forged_response =
 				rpz_callback_from_iterator_cname(qstate, iq);
+			int count = 0;
 			while(forged_response && reply_find_rrset_section_an(
 				forged_response->rep, iq->qchase.qname,
 				iq->qchase.qname_len, LDNS_RR_TYPE_CNAME,
-				iq->qchase.qclass)) {
+				iq->qchase.qclass) &&
+				iq->qchase.qtype != LDNS_RR_TYPE_CNAME &&
+				count++ < ie->max_query_restarts) {
 				/* another cname to follow */
 				if(!handle_cname_response(qstate, iq, forged_response,
 					&sname, &snamelen)) {
@@ -3926,17 +4045,9 @@ processFinished(struct module_qstate* qstate, struct iter_qstate* iq,
 		!qstate->env->cfg->val_log_squelch) {
 		char* err_str = errinf_to_str_misc(qstate);
 		if(err_str) {
-			size_t err_str_len = strlen(err_str);
 			verbose(VERB_ALGO, "iterator EDE: %s", err_str);
-			/* allocate space and store the error
-			 * string */
-			iq->response->rep->reason_bogus_str = regional_alloc(
-				qstate->region,
-				sizeof(char) * (err_str_len+1));
-			memcpy(iq->response->rep->reason_bogus_str,
-				err_str, err_str_len+1);
+			iq->response->rep->reason_bogus_str = err_str;
 		}
-		free(err_str);
 	}
 
 	/* we have finished processing this query */
diff --git a/usr.sbin/unbound/libunbound/context.c b/usr.sbin/unbound/libunbound/context.c
index f7c0a2cd5fa..a319f59cdea 100644
--- a/usr.sbin/unbound/libunbound/context.c
+++ b/usr.sbin/unbound/libunbound/context.c
@@ -53,6 +53,8 @@
 #include "util/storage/slabhash.h"
 #include "util/edns.h"
 #include "sldns/sbuffer.h"
+#include "iterator/iter_fwd.h"
+#include "iterator/iter_hints.h"
 
 int 
 context_finalize(struct ub_ctx* ctx)
@@ -85,6 +87,12 @@ context_finalize(struct ub_ctx* ctx)
 	if(!auth_zones_apply_cfg(ctx->env->auth_zones, cfg, 1, &is_rpz,
 		ctx->env, &ctx->mods))
 		return UB_INITFAIL;
+	if(!(ctx->env->fwds = forwards_create()) ||
+		!forwards_apply_cfg(ctx->env->fwds, cfg))
+		return UB_INITFAIL;
+	if(!(ctx->env->hints = hints_create()) ||
+		!hints_apply_cfg(ctx->env->hints, cfg))
+		return UB_INITFAIL;
 	if(!edns_strings_apply_cfg(ctx->env->edns_strings, cfg))
 		return UB_INITFAIL;
 	if(!slabhash_is_size(ctx->env->msg_cache, cfg->msg_cache_size,
diff --git a/usr.sbin/unbound/libunbound/libunbound.c b/usr.sbin/unbound/libunbound/libunbound.c
index 80a82bb47dd..17057ec6c01 100644
--- a/usr.sbin/unbound/libunbound/libunbound.c
+++ b/usr.sbin/unbound/libunbound/libunbound.c
@@ -66,6 +66,8 @@
 #include "services/authzone.h"
 #include "services/listen_dnsport.h"
 #include "sldns/sbuffer.h"
+#include "iterator/iter_fwd.h"
+#include "iterator/iter_hints.h"
 #ifdef HAVE_PTHREAD
 #include <signal.h>
 #endif
@@ -171,6 +173,7 @@ static struct ub_ctx* ub_ctx_create_nopipe(void)
 	ctx->env->worker = NULL;
 	ctx->env->need_to_validate = 0;
 	modstack_init(&ctx->mods);
+	ctx->env->modstack = &ctx->mods;
 	rbtree_init(&ctx->queries, &context_query_cmp);
 	return ctx;
 }
@@ -379,6 +382,8 @@ ub_ctx_delete(struct ub_ctx* ctx)
 		config_delete(ctx->env->cfg);
 		edns_known_options_delete(ctx->env);
 		edns_strings_delete(ctx->env->edns_strings);
+		forwards_delete(ctx->env->fwds);
+		hints_delete(ctx->env->hints);
 		auth_zones_delete(ctx->env->auth_zones);
 		free(ctx->env);
 	}
diff --git a/usr.sbin/unbound/libunbound/libworker.c b/usr.sbin/unbound/libunbound/libworker.c
index 0e1c4039376..5c75f61d8dc 100644
--- a/usr.sbin/unbound/libunbound/libworker.c
+++ b/usr.sbin/unbound/libunbound/libworker.c
@@ -70,8 +70,6 @@
 #include "util/data/msgreply.h"
 #include "util/data/msgencode.h"
 #include "util/tube.h"
-#include "iterator/iter_fwd.h"
-#include "iterator/iter_hints.h"
 #include "sldns/sbuffer.h"
 #include "sldns/str2wire.h"
 #ifdef USE_DNSTAP
@@ -100,8 +98,6 @@ libworker_delete_env(struct libworker* w)
 			!w->is_bg || w->is_bg_thread);
 		sldns_buffer_free(w->env->scratch_buffer);
 		regional_destroy(w->env->scratch);
-		forwards_delete(w->env->fwds);
-		hints_delete(w->env->hints);
 		ub_randfree(w->env->rnd);
 		free(w->env);
 	}
@@ -159,30 +155,19 @@ libworker_setup(struct ub_ctx* ctx, int is_bg, struct ub_event_base* eb)
 	}
 	w->env->scratch = regional_create_custom(cfg->msg_buffer_size);
 	w->env->scratch_buffer = sldns_buffer_new(cfg->msg_buffer_size);
-	w->env->fwds = forwards_create();
-	if(w->env->fwds && !forwards_apply_cfg(w->env->fwds, cfg)) { 
-		forwards_delete(w->env->fwds);
-		w->env->fwds = NULL;
-	}
-	w->env->hints = hints_create();
-	if(w->env->hints && !hints_apply_cfg(w->env->hints, cfg)) { 
-		hints_delete(w->env->hints);
-		w->env->hints = NULL;
-	}
 #ifdef HAVE_SSL
 	w->sslctx = connect_sslctx_create(NULL, NULL,
 		cfg->tls_cert_bundle, cfg->tls_win_cert);
 	if(!w->sslctx) {
 		/* to make the setup fail after unlock */
-		hints_delete(w->env->hints);
-		w->env->hints = NULL;
+		sldns_buffer_free(w->env->scratch_buffer);
+		w->env->scratch_buffer = NULL;
 	}
 #endif
 	if(!w->is_bg || w->is_bg_thread) {
 		lock_basic_unlock(&ctx->cfglock);
 	}
-	if(!w->env->scratch || !w->env->scratch_buffer || !w->env->fwds ||
-		!w->env->hints) {
+	if(!w->env->scratch || !w->env->scratch_buffer) {
 		libworker_delete(w);
 		return NULL;
 	}
diff --git a/usr.sbin/unbound/services/authzone.c b/usr.sbin/unbound/services/authzone.c
index 93fef8ef1c2..f01a6d9e0e0 100644
--- a/usr.sbin/unbound/services/authzone.c
+++ b/usr.sbin/unbound/services/authzone.c
@@ -2152,6 +2152,16 @@ auth_zones_cfg(struct auth_zones* az, struct config_auth* c)
 		if(az->rpz_first)
 			az->rpz_first->rpz_az_prev = z;
 		az->rpz_first = z;
+	} else if(c->isrpz && z->rpz) {
+		if(!rpz_config(z->rpz, c)) {
+			log_err("Could not change rpz config");
+			if(x) {
+				lock_basic_unlock(&x->lock);
+			}
+			lock_rw_unlock(&z->lock);
+			lock_rw_unlock(&az->rpz_lock);
+			return 0;
+		}
 	}
 	if(c->isrpz) {
 		lock_rw_unlock(&az->rpz_lock);
diff --git a/usr.sbin/unbound/services/cache/dns.c b/usr.sbin/unbound/services/cache/dns.c
index 6a980548d72..632ed79ace4 100644
--- a/usr.sbin/unbound/services/cache/dns.c
+++ b/usr.sbin/unbound/services/cache/dns.c
@@ -193,46 +193,6 @@ dns_cache_store_msg(struct module_env* env, struct query_info* qinfo,
 	slabhash_insert(env->msg_cache, hash, &e->entry, rep, env->alloc);
 }
 
-/** see if an rrset is expired above the qname, return upper qname. */
-static int
-rrset_expired_above(struct module_env* env, uint8_t** qname, size_t* qnamelen,
-	uint16_t searchtype, uint16_t qclass, time_t now, uint8_t* expiretop,
-	size_t expiretoplen)
-{
-	struct ub_packed_rrset_key *rrset;
-	uint8_t lablen;
-
-	while(*qnamelen > 0) {
-		/* look one label higher */
-		lablen = **qname;
-		*qname += lablen + 1;
-		*qnamelen -= lablen + 1;
-		if(*qnamelen <= 0)
-			break;
-
-		/* looks up with a time of 0, to see expired entries */
-		if((rrset = rrset_cache_lookup(env->rrset_cache, *qname,
-			*qnamelen, searchtype, qclass, 0, 0, 0))) {
-			struct packed_rrset_data* data =
-				(struct packed_rrset_data*)rrset->entry.data;
-			if(now > data->ttl) {
-				/* it is expired, this is not wanted */
-				lock_rw_unlock(&rrset->entry.lock);
-				log_nametypeclass(VERB_ALGO, "this rrset is expired", *qname, searchtype, qclass);
-				return 1;
-			}
-			/* it is not expired, continue looking */
-			lock_rw_unlock(&rrset->entry.lock);
-		}
-
-		/* do not look above the expiretop. */
-		if(expiretop && *qnamelen == expiretoplen &&
-			query_dname_compare(*qname, expiretop)==0)
-			break;
-	}
-	return 0;
-}
-
 /** find closest NS or DNAME and returns the rrset (locked) */
 static struct ub_packed_rrset_key*
 find_closest_of_type(struct module_env* env, uint8_t* qname, size_t qnamelen, 
@@ -266,12 +226,12 @@ find_closest_of_type(struct module_env* env, uint8_t* qname, size_t qnamelen,
 			/* check for expiry, but we have to let go of the rrset
 			 * for the lock ordering */
 			lock_rw_unlock(&rrset->entry.lock);
-			/* the expired_above function always takes off one
-			 * label (if qnamelen>0) and returns the final qname
-			 * where it searched, so we can continue from there
-			 * turning the O N*N search into O N. */
-			if(!rrset_expired_above(env, &qname, &qnamelen,
-				searchtype, qclass, now, expiretop,
+			/* the rrset_cache_expired_above function always takes
+			 * off one label (if qnamelen>0) and returns the final
+			 * qname where it searched, so we can continue from
+			 * there turning the O N*N search into O N. */
+			if(!rrset_cache_expired_above(env->rrset_cache, &qname,
+				&qnamelen, searchtype, qclass, now, expiretop,
 				expiretoplen)) {
 				/* we want to return rrset, but it may be
 				 * gone from cache, if so, just loop like
diff --git a/usr.sbin/unbound/services/cache/infra.c b/usr.sbin/unbound/services/cache/infra.c
index 31462d13ae0..457685ab598 100644
--- a/usr.sbin/unbound/services/cache/infra.c
+++ b/usr.sbin/unbound/services/cache/infra.c
@@ -234,6 +234,81 @@ setup_domain_limits(struct infra_cache* infra, struct config_file* cfg)
 	return 1;
 }
 
+/** find or create element in wait limit netblock tree */
+static struct wait_limit_netblock_info*
+wait_limit_netblock_findcreate(struct infra_cache* infra, char* str,
+	int cookie)
+{
+	rbtree_type* tree;
+	struct sockaddr_storage addr;
+	int net;
+	socklen_t addrlen;
+	struct wait_limit_netblock_info* d;
+
+	if(!netblockstrtoaddr(str, 0, &addr, &addrlen, &net)) {
+		log_err("cannot parse wait limit netblock '%s'", str);
+		return 0;
+	}
+
+	/* can we find it? */
+	if(cookie)
+		tree = &infra->wait_limits_cookie_netblock;
+	else
+		tree = &infra->wait_limits_netblock;
+	d = (struct wait_limit_netblock_info*)addr_tree_find(tree, &addr,
+		addrlen, net);
+	if(d)
+		return d;
+
+	/* create it */
+	d = (struct wait_limit_netblock_info*)calloc(1, sizeof(*d));
+	if(!d)
+		return NULL;
+	d->limit = -1;
+	if(!addr_tree_insert(tree, &d->node, &addr, addrlen, net)) {
+		log_err("duplicate element in domainlimit tree");
+		free(d);
+		return NULL;
+	}
+	return d;
+}
+
+
+/** insert wait limit information into lookup tree */
+static int
+infra_wait_limit_netblock_insert(struct infra_cache* infra,
+	struct config_file* cfg)
+{
+	struct config_str2list* p;
+	struct wait_limit_netblock_info* d;
+	for(p = cfg->wait_limit_netblock; p; p = p->next) {
+		d = wait_limit_netblock_findcreate(infra, p->str, 0);
+		if(!d)
+			return 0;
+		d->limit = atoi(p->str2);
+	}
+	for(p = cfg->wait_limit_cookie_netblock; p; p = p->next) {
+		d = wait_limit_netblock_findcreate(infra, p->str, 1);
+		if(!d)
+			return 0;
+		d->limit = atoi(p->str2);
+	}
+	return 1;
+}
+
+/** setup wait limits tree (0 on failure) */
+static int
+setup_wait_limits(struct infra_cache* infra, struct config_file* cfg)
+{
+	addr_tree_init(&infra->wait_limits_netblock);
+	addr_tree_init(&infra->wait_limits_cookie_netblock);
+	if(!infra_wait_limit_netblock_insert(infra, cfg))
+		return 0;
+	addr_tree_init_parents(&infra->wait_limits_netblock);
+	addr_tree_init_parents(&infra->wait_limits_cookie_netblock);
+	return 1;
+}
+
 struct infra_cache* 
 infra_create(struct config_file* cfg)
 {
@@ -267,6 +342,10 @@ infra_create(struct config_file* cfg)
 		infra_delete(infra);
 		return NULL;
 	}
+	if(!setup_wait_limits(infra, cfg)) {
+		infra_delete(infra);
+		return NULL;
+	}
 	infra_ip_ratelimit = cfg->ip_ratelimit;
 	infra->client_ip_rates = slabhash_create(cfg->ip_ratelimit_slabs,
 	    INFRA_HOST_STARTSIZE, cfg->ip_ratelimit_size, &ip_rate_sizefunc,
@@ -287,6 +366,12 @@ static void domain_limit_free(rbnode_type* n, void* ATTR_UNUSED(arg))
 	}
 }
 
+/** delete wait_limit_netblock_info entries */
+static void wait_limit_netblock_del(rbnode_type* n, void* ATTR_UNUSED(arg))
+{
+	free(n);
+}
+
 void 
 infra_delete(struct infra_cache* infra)
 {
@@ -296,6 +381,10 @@ infra_delete(struct infra_cache* infra)
 	slabhash_delete(infra->domain_rates);
 	traverse_postorder(&infra->domain_limits, domain_limit_free, NULL);
 	slabhash_delete(infra->client_ip_rates);
+	traverse_postorder(&infra->wait_limits_netblock,
+		wait_limit_netblock_del, NULL);
+	traverse_postorder(&infra->wait_limits_cookie_netblock,
+		wait_limit_netblock_del, NULL);
 	free(infra);
 }
 
@@ -880,7 +969,8 @@ static void infra_create_ratedata(struct infra_cache* infra,
 
 /** create rate data item for ip address */
 static void infra_ip_create_ratedata(struct infra_cache* infra,
-	struct sockaddr_storage* addr, socklen_t addrlen, time_t timenow)
+	struct sockaddr_storage* addr, socklen_t addrlen, time_t timenow,
+	int mesh_wait)
 {
 	hashvalue_type h = hash_addr(addr, addrlen, 0);
 	struct ip_rate_key* k = (struct ip_rate_key*)calloc(1, sizeof(*k));
@@ -898,6 +988,7 @@ static void infra_ip_create_ratedata(struct infra_cache* infra,
 	k->entry.data = d;
 	d->qps[0] = 1;
 	d->timestamp[0] = timenow;
+	d->mesh_wait = mesh_wait;
 	slabhash_insert(infra->client_ip_rates, h, &k->entry, d, NULL);
 }
 
@@ -1121,6 +1212,81 @@ int infra_ip_ratelimit_inc(struct infra_cache* infra,
 	}
 
 	/* create */
-	infra_ip_create_ratedata(infra, addr, addrlen, timenow);
+	infra_ip_create_ratedata(infra, addr, addrlen, timenow, 0);
 	return 1;
 }
+
+int infra_wait_limit_allowed(struct infra_cache* infra, struct comm_reply* rep,
+	int cookie_valid, struct config_file* cfg)
+{
+	struct lruhash_entry* entry;
+	if(cfg->wait_limit == 0)
+		return 1;
+
+	entry = infra_find_ip_ratedata(infra, &rep->client_addr,
+		rep->client_addrlen, 0);
+	if(entry) {
+		rbtree_type* tree;
+		struct wait_limit_netblock_info* w;
+		struct rate_data* d = (struct rate_data*)entry->data;
+		int mesh_wait = d->mesh_wait;
+		lock_rw_unlock(&entry->lock);
+
+		/* have the wait amount, check how much is allowed */
+		if(cookie_valid)
+			tree = &infra->wait_limits_cookie_netblock;
+		else	tree = &infra->wait_limits_netblock;
+		w = (struct wait_limit_netblock_info*)addr_tree_lookup(tree,
+			&rep->client_addr, rep->client_addrlen);
+		if(w) {
+			if(w->limit != -1 && mesh_wait > w->limit)
+				return 0;
+		} else {
+			/* if there is no IP netblock specific information,
+			 * use the configured value. */
+			if(mesh_wait > (cookie_valid?cfg->wait_limit_cookie:
+				cfg->wait_limit))
+				return 0;
+		}
+	}
+	return 1;
+}
+
+void infra_wait_limit_inc(struct infra_cache* infra, struct comm_reply* rep,
+	time_t timenow, struct config_file* cfg)
+{
+	struct lruhash_entry* entry;
+	if(cfg->wait_limit == 0)
+		return;
+
+	/* Find it */
+	entry = infra_find_ip_ratedata(infra, &rep->client_addr,
+		rep->client_addrlen, 1);
+	if(entry) {
+		struct rate_data* d = (struct rate_data*)entry->data;
+		d->mesh_wait++;
+		lock_rw_unlock(&entry->lock);
+		return;
+	}
+
+	/* Create it */
+	infra_ip_create_ratedata(infra, &rep->client_addr,
+		rep->client_addrlen, timenow, 1);
+}
+
+void infra_wait_limit_dec(struct infra_cache* infra, struct comm_reply* rep,
+	struct config_file* cfg)
+{
+	struct lruhash_entry* entry;
+	if(cfg->wait_limit == 0)
+		return;
+
+	entry = infra_find_ip_ratedata(infra, &rep->client_addr,
+		rep->client_addrlen, 1);
+	if(entry) {
+		struct rate_data* d = (struct rate_data*)entry->data;
+		if(d->mesh_wait > 0)
+			d->mesh_wait--;
+		lock_rw_unlock(&entry->lock);
+	}
+}
diff --git a/usr.sbin/unbound/services/cache/infra.h b/usr.sbin/unbound/services/cache/infra.h
index 525073bf35b..ee6f384de34 100644
--- a/usr.sbin/unbound/services/cache/infra.h
+++ b/usr.sbin/unbound/services/cache/infra.h
@@ -122,6 +122,10 @@ struct infra_cache {
 	rbtree_type domain_limits;
 	/** hash table with query rates per client ip: ip_rate_key, ip_rate_data */
 	struct slabhash* client_ip_rates;
+	/** tree of addr_tree_node, with wait_limit_netblock_info information */
+	rbtree_type wait_limits_netblock;
+	/** tree of addr_tree_node, with wait_limit_netblock_info information */
+	rbtree_type wait_limits_cookie_netblock;
 };
 
 /** ratelimit, unless overridden by domain_limits, 0 is off */
@@ -184,10 +188,22 @@ struct rate_data {
 	/** what the timestamp is of the qps array members, counter is
 	 * valid for that timestamp.  Usually now and now-1. */
 	time_t timestamp[RATE_WINDOW];
+	/** the number of queries waiting in the mesh */
+	int mesh_wait;
 };
 
 #define ip_rate_data rate_data
 
+/**
+ * Data to store the configuration per netblock for the wait limit
+ */
+struct wait_limit_netblock_info {
+	/** The addr tree node, this must be first. */
+	struct addr_tree_node node;
+	/** the limit on the amount */
+	int limit;
+};
+
 /** infra host cache default hash lookup size */
 #define INFRA_HOST_STARTSIZE 32
 /** bytes per zonename reserved in the hostcache, dnamelen(zonename.com.) */
@@ -474,4 +490,16 @@ void ip_rate_delkeyfunc(void* d, void* arg);
 /* delete data */
 #define ip_rate_deldatafunc rate_deldatafunc
 
+/** See if the IP address can have another reply in the wait limit */
+int infra_wait_limit_allowed(struct infra_cache* infra, struct comm_reply* rep,
+	int cookie_valid, struct config_file* cfg);
+
+/** Increment number of waiting replies for IP */
+void infra_wait_limit_inc(struct infra_cache* infra, struct comm_reply* rep,
+	time_t timenow, struct config_file* cfg);
+
+/** Decrement number of waiting replies for IP */
+void infra_wait_limit_dec(struct infra_cache* infra, struct comm_reply* rep,
+	struct config_file* cfg);
+
 #endif /* SERVICES_CACHE_INFRA_H */
diff --git a/usr.sbin/unbound/services/cache/rrset.c b/usr.sbin/unbound/services/cache/rrset.c
index 4e3d08bdaaf..2c03214c8fe 100644
--- a/usr.sbin/unbound/services/cache/rrset.c
+++ b/usr.sbin/unbound/services/cache/rrset.c
@@ -46,6 +46,7 @@
 #include "util/data/packed_rrset.h"
 #include "util/data/msgreply.h"
 #include "util/data/msgparse.h"
+#include "util/data/dname.h"
 #include "util/regional.h"
 #include "util/alloc.h"
 #include "util/net_help.h"
@@ -127,6 +128,9 @@ need_to_update_rrset(void* nd, void* cd, time_t timenow, int equal, int ns)
 {
 	struct packed_rrset_data* newd = (struct packed_rrset_data*)nd;
 	struct packed_rrset_data* cached = (struct packed_rrset_data*)cd;
+	/*	o if new data is expired, current data is better */
+	if( newd->ttl < timenow && cached->ttl >= timenow)
+		return 0;
 	/* 	o store if rrset has been validated 
 	 *  		everything better than bogus data 
 	 *  		secure is preferred */
@@ -440,6 +444,89 @@ rrset_check_sec_status(struct rrset_cache* r,
 	lock_rw_unlock(&e->lock);
 }
 
+void
+rrset_cache_remove_above(struct rrset_cache* r, uint8_t** qname, size_t*
+	qnamelen, uint16_t searchtype, uint16_t qclass, time_t now, uint8_t*
+	qnametop, size_t qnametoplen)
+{
+	struct ub_packed_rrset_key *rrset;
+	uint8_t lablen;
+
+	while(*qnamelen > 0) {
+		/* look one label higher */
+		lablen = **qname;
+		*qname += lablen + 1;
+		*qnamelen -= lablen + 1;
+		if(*qnamelen <= 0)
+			return;
+
+		/* stop at qnametop */
+		if(qnametop && *qnamelen == qnametoplen &&
+			query_dname_compare(*qname, qnametop)==0)
+			return;
+
+		if(verbosity >= VERB_ALGO) {
+			/* looks up with a time of 0, to see expired entries */
+			if((rrset = rrset_cache_lookup(r, *qname,
+				*qnamelen, searchtype, qclass, 0, 0, 0))) {
+				struct packed_rrset_data* data =
+					(struct packed_rrset_data*)rrset->entry.data;
+				int expired = (now > data->ttl);
+				lock_rw_unlock(&rrset->entry.lock);
+				if(expired)
+					log_nametypeclass(verbosity, "this "
+						"(grand)parent rrset will be "
+						"removed (expired)",
+						*qname, searchtype, qclass);
+				else	log_nametypeclass(verbosity, "this "
+						"(grand)parent rrset will be "
+						"removed",
+						*qname, searchtype, qclass);
+			}
+		}
+		rrset_cache_remove(r, *qname, *qnamelen, searchtype, qclass, 0);
+	}
+}
+
+int
+rrset_cache_expired_above(struct rrset_cache* r, uint8_t** qname, size_t*
+	qnamelen, uint16_t searchtype, uint16_t qclass, time_t now, uint8_t*
+	qnametop, size_t qnametoplen)
+{
+	struct ub_packed_rrset_key *rrset;
+	uint8_t lablen;
+
+	while(*qnamelen > 0) {
+		/* look one label higher */
+		lablen = **qname;
+		*qname += lablen + 1;
+		*qnamelen -= lablen + 1;
+		if(*qnamelen <= 0)
+			break;
+
+		/* looks up with a time of 0, to see expired entries */
+		if((rrset = rrset_cache_lookup(r, *qname,
+			*qnamelen, searchtype, qclass, 0, 0, 0))) {
+			struct packed_rrset_data* data =
+				(struct packed_rrset_data*)rrset->entry.data;
+			if(now > data->ttl) {
+				/* it is expired, this is not wanted */
+				lock_rw_unlock(&rrset->entry.lock);
+				log_nametypeclass(VERB_ALGO, "this rrset is expired", *qname, searchtype, qclass);
+				return 1;
+			}
+			/* it is not expired, continue looking */
+			lock_rw_unlock(&rrset->entry.lock);
+		}
+
+		/* do not look above the qnametop. */
+		if(qnametop && *qnamelen == qnametoplen &&
+			query_dname_compare(*qname, qnametop)==0)
+			break;
+	}
+	return 0;
+}
+
 void rrset_cache_remove(struct rrset_cache* r, uint8_t* nm, size_t nmlen,
 	uint16_t type, uint16_t dclass, uint32_t flags)
 {
diff --git a/usr.sbin/unbound/services/cache/rrset.h b/usr.sbin/unbound/services/cache/rrset.h
index 7c36d4032eb..6db79d90f53 100644
--- a/usr.sbin/unbound/services/cache/rrset.h
+++ b/usr.sbin/unbound/services/cache/rrset.h
@@ -232,6 +232,37 @@ void rrset_check_sec_status(struct rrset_cache* r,
 	struct ub_packed_rrset_key* rrset, time_t now);
 
 /**
+ * Removes rrsets above the qname, returns upper qname.
+ * @param r: the rrset cache.
+ * @param qname: the start qname, also used as the output.
+ * @param qnamelen: length of qname, updated when it returns.
+ * @param searchtype: qtype to search for.
+ * @param qclass: qclass to search for.
+ * @param now: current time.
+ * @param qnametop: the top qname to stop removal (it is not removed).
+ * @param qnametoplen: length of qnametop.
+ */
+void rrset_cache_remove_above(struct rrset_cache* r, uint8_t** qname,
+	size_t* qnamelen, uint16_t searchtype, uint16_t qclass, time_t now,
+	uint8_t* qnametop, size_t qnametoplen);
+
+/**
+ * Sees if an rrset is expired above the qname, returns upper qname.
+ * @param r: the rrset cache.
+ * @param qname: the start qname, also used as the output.
+ * @param qnamelen: length of qname, updated when it returns.
+ * @param searchtype: qtype to search for.
+ * @param qclass: qclass to search for.
+ * @param now: current time.
+ * @param qnametop: the top qname, don't look farther than that.
+ * @param qnametoplen: length of qnametop.
+ * @return true if there is an expired rrset above, false otherwise.
+ */
+int rrset_cache_expired_above(struct rrset_cache* r, uint8_t** qname,
+	size_t* qnamelen, uint16_t searchtype, uint16_t qclass, time_t now,
+	uint8_t* qnametop, size_t qnametoplen);
+
+/**
  * Remove an rrset from the cache, by name and type and flags
  * @param r: rrset cache
  * @param nm: name of rrset
diff --git a/usr.sbin/unbound/services/listen_dnsport.c b/usr.sbin/unbound/services/listen_dnsport.c
index 753550978a0..7eb59a1618a 100644
--- a/usr.sbin/unbound/services/listen_dnsport.c
+++ b/usr.sbin/unbound/services/listen_dnsport.c
@@ -140,9 +140,11 @@ void
 verbose_print_unbound_socket(struct unbound_socket* ub_sock)
 {
 	if(verbosity >= VERB_ALGO) {
+		char buf[256];
 		log_info("listing of unbound_socket structure:");
-		verbose_print_addr(ub_sock->addr);
-		log_info("s is: %d, fam is: %s, acl: %s", ub_sock->s,
+		addr_to_str((void*)ub_sock->addr, ub_sock->addrlen, buf,
+			sizeof(buf));
+		log_info("%s s is: %d, fam is: %s, acl: %s", buf, ub_sock->s,
 			ub_sock->fam == AF_INET?"AF_INET":"AF_INET6",
 			ub_sock->acl?"yes":"no");
 	}
@@ -610,7 +612,9 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
 #  elif defined(IP_DONTFRAG) && !defined(__APPLE__)
 		/* the IP_DONTFRAG option if defined in the 11.0 OSX headers,
 		 * but does not work on that version, so we exclude it */
-		int off = 0;
+		/* a nonzero value disables fragmentation, according to
+		 * docs.oracle.com for ip(4). */
+		int off = 1;
 		if (setsockopt(s, IPPROTO_IP, IP_DONTFRAG,
 			&off, (socklen_t)sizeof(off)) < 0) {
 			log_err("setsockopt(..., IP_DONTFRAG, ...) failed: %s",
@@ -1047,7 +1051,22 @@ make_sock(int stype, const char* ifname, const char* port,
 		}
 	}
 
-	ub_sock->addr = res;
+	if(!res->ai_addr) {
+		log_err("getaddrinfo returned no address");
+		freeaddrinfo(res);
+		sock_close(s);
+		return -1;
+	}
+	ub_sock->addr = memdup(res->ai_addr, res->ai_addrlen);
+	ub_sock->addrlen = res->ai_addrlen;
+	if(!ub_sock->addr) {
+		log_err("out of memory: allocate listening address");
+		freeaddrinfo(res);
+		sock_close(s);
+		return -1;
+	}
+	freeaddrinfo(res);
+
 	ub_sock->s = s;
 	ub_sock->fam = hints->ai_family;
 	ub_sock->acl = NULL;
@@ -1277,8 +1296,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_DGRAM, ifname, port, hints, 1,
 			&noip6, rcv, snd, reuseport, transparent,
 			tcp_mss, nodelay, freebind, use_systemd, dscp, ub_sock)) == -1) {
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				log_warn("IPv6 protocol not available");
@@ -1289,8 +1307,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		/* getting source addr packet info is highly non-portable */
 		if(!set_recvpktinfo(s, hints->ai_family)) {
 			sock_close(s);
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1301,8 +1318,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 			?listen_type_udpancil_dnscrypt:listen_type_udpancil,
 			is_pp2, ub_sock)) {
 			sock_close(s);
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1314,8 +1330,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_DGRAM, ifname, port, hints, 1,
 			&noip6, rcv, snd, reuseport, transparent,
 			tcp_mss, nodelay, freebind, use_systemd, dscp, ub_sock)) == -1) {
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				log_warn("IPv6 protocol not available");
@@ -1332,8 +1347,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 				listen_type_udpancil:listen_type_udp),
 			is_pp2, ub_sock)) {
 			sock_close(s);
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1356,8 +1370,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 		if((s = make_sock_port(SOCK_STREAM, ifname, port, hints, 1,
 			&noip6, 0, 0, reuseport, transparent, tcp_mss, nodelay,
 			freebind, use_systemd, dscp, ub_sock)) == -1) {
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			if(noip6) {
 				/*log_warn("IPv6 protocol not available");*/
@@ -1369,8 +1382,7 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
 			verbose(VERB_ALGO, "setup TCP for SSL service");
 		if(!port_insert(list, s, port_type, is_pp2, ub_sock)) {
 			sock_close(s);
-			if(ub_sock->addr)
-				freeaddrinfo(ub_sock->addr);
+			free(ub_sock->addr);
 			free(ub_sock);
 			return 0;
 		}
@@ -1952,8 +1964,7 @@ void listening_ports_free(struct listen_port* list)
 		}
 		/* rc_ports don't have ub_socket */
 		if(list->socket) {
-			if(list->socket->addr)
-				freeaddrinfo(list->socket->addr);
+			free(list->socket->addr);
 			free(list->socket);
 		}
 		free(list);
diff --git a/usr.sbin/unbound/services/listen_dnsport.h b/usr.sbin/unbound/services/listen_dnsport.h
index 816d79aea61..84ac4b068b1 100644
--- a/usr.sbin/unbound/services/listen_dnsport.h
+++ b/usr.sbin/unbound/services/listen_dnsport.h
@@ -107,11 +107,13 @@ enum listen_type {
  * socket properties (just like NSD nsd_socket structure definition)
  */
 struct unbound_socket {
-	/** socket-address structure */
-	struct addrinfo* addr;
+	/** the address of the socket */
+	struct sockaddr* addr;
+	/** length of the address */
+	socklen_t addrlen;
 	/** socket descriptor returned by socket() syscall */
 	int s;
-	/** address family (AF_INET/IF_INET6) */
+	/** address family (AF_INET/AF_INET6) */
 	int fam;
 	/** ACL on the socket (listening interface) */
 	struct acl_addr* acl;
diff --git a/usr.sbin/unbound/services/localzone.c b/usr.sbin/unbound/services/localzone.c
index 9c8e3c7acb1..51056c8ffef 100644
--- a/usr.sbin/unbound/services/localzone.c
+++ b/usr.sbin/unbound/services/localzone.c
@@ -330,14 +330,16 @@ get_rr_nameclass(const char* str, uint8_t** nm, uint16_t* dclass,
 static struct local_rrset*
 local_data_find_type(struct local_data* data, uint16_t type, int alias_ok)
 {
-	struct local_rrset* p;
+	struct local_rrset* p, *cname = NULL;
 	type = htons(type);
 	for(p = data->rrsets; p; p = p->next) {
 		if(p->rrset->rk.type == type)
 			return p;
 		if(alias_ok && p->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME))
-			return p;
+			cname = p;
 	}
+	if(alias_ok)
+		return cname;
 	return NULL;
 }
 
diff --git a/usr.sbin/unbound/services/mesh.c b/usr.sbin/unbound/services/mesh.c
index 47cfb04249b..e886c4b92c8 100644
--- a/usr.sbin/unbound/services/mesh.c
+++ b/usr.sbin/unbound/services/mesh.c
@@ -47,6 +47,7 @@
 #include "services/outbound_list.h"
 #include "services/cache/dns.h"
 #include "services/cache/rrset.h"
+#include "services/cache/infra.h"
 #include "util/log.h"
 #include "util/net_help.h"
 #include "util/module.h"
@@ -385,7 +386,7 @@ mesh_serve_expired_init(struct mesh_state* mstate, int timeout)
 		&mesh_serve_expired_lookup;
 
 	/* In case this timer already popped, start it again */
-	if(!mstate->s.serve_expired_data->timer) {
+	if(!mstate->s.serve_expired_data->timer && timeout != -1) {
 		mstate->s.serve_expired_data->timer = comm_timer_create(
 			mstate->s.env->worker_base, mesh_serve_expired_callback, mstate);
 		if(!mstate->s.serve_expired_data->timer)
@@ -415,6 +416,14 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 	if(rep->c->tcp_req_info) {
 		r_buffer = rep->c->tcp_req_info->spool_buffer;
 	}
+	if(!infra_wait_limit_allowed(mesh->env->infra_cache, rep,
+		edns->cookie_valid, mesh->env->cfg)) {
+		verbose(VERB_ALGO, "Too many queries waiting from the IP. "
+			"dropping incoming query.");
+		comm_point_drop_reply(rep);
+		mesh->stats_dropped++;
+		return;
+	}
 	if(!unique)
 		s = mesh_area_find(mesh, cinfo, qinfo, qflags&(BIT_RD|BIT_CD), 0, 0);
 	/* does this create a new reply state? */
@@ -511,6 +520,19 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 		log_err("mesh_new_client: out of memory initializing serve expired");
 		goto servfail_mem;
 	}
+#ifdef USE_CACHEDB
+	if(!timeout && mesh->env->cfg->serve_expired &&
+		!mesh->env->cfg->serve_expired_client_timeout &&
+		(mesh->env->cachedb_enabled &&
+		 mesh->env->cfg->cachedb_check_when_serve_expired)) {
+		if(!mesh_serve_expired_init(s, -1)) {
+			log_err("mesh_new_client: out of memory initializing serve expired");
+			goto servfail_mem;
+		}
+	}
+#endif
+	infra_wait_limit_inc(mesh->env->infra_cache, rep, *mesh->env->now,
+		mesh->env->cfg);
 	/* update statistics */
 	if(was_detached) {
 		log_assert(mesh->num_detached_states > 0);
@@ -616,6 +638,18 @@ mesh_new_callback(struct mesh_area* mesh, struct query_info* qinfo,
 			mesh_state_delete(&s->s);
 		return 0;
 	}
+#ifdef USE_CACHEDB
+	if(!timeout && mesh->env->cfg->serve_expired &&
+		!mesh->env->cfg->serve_expired_client_timeout &&
+		(mesh->env->cachedb_enabled &&
+		 mesh->env->cfg->cachedb_check_when_serve_expired)) {
+		if(!mesh_serve_expired_init(s, -1)) {
+			if(added)
+				mesh_state_delete(&s->s);
+			return 0;
+		}
+	}
+#endif
 	/* update statistics */
 	if(was_detached) {
 		log_assert(mesh->num_detached_states > 0);
@@ -930,6 +964,8 @@ mesh_state_cleanup(struct mesh_state* mstate)
 		 * takes no time and also it does not do the mesh accounting */
 		mstate->reply_list = NULL;
 		for(; rep; rep=rep->next) {
+			infra_wait_limit_dec(mesh->env->infra_cache,
+				&rep->query_reply, mesh->env->cfg);
 			comm_point_drop_reply(&rep->query_reply);
 			log_assert(mesh->num_reply_addrs > 0);
 			mesh->num_reply_addrs--;
@@ -1179,7 +1215,7 @@ mesh_do_callback(struct mesh_state* m, int rcode, struct reply_info* rep,
 		rcode = LDNS_RCODE_SERVFAIL;
 	if(!rcode && rep && (rep->security == sec_status_bogus ||
 		rep->security == sec_status_secure_sentinel_fail)) {
-		if(!(reason = errinf_to_str_bogus(&m->s)))
+		if(!(reason = errinf_to_str_bogus(&m->s, NULL)))
 			rcode = LDNS_RCODE_SERVFAIL;
 	}
 	/* send the reply */
@@ -1413,6 +1449,8 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 		comm_point_send_reply(&r->query_reply);
 		m->reply_list = rlist;
 	}
+	infra_wait_limit_dec(m->s.env->infra_cache, &r->query_reply,
+		m->s.env->cfg);
 	/* account */
 	log_assert(m->s.env->mesh->num_reply_addrs > 0);
 	m->s.env->mesh->num_reply_addrs--;
@@ -1436,7 +1474,7 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 		log_reply_info(NO_VERBOSE, &m->s.qinfo,
 			&r->query_reply.client_addr,
 			r->query_reply.client_addrlen, duration, 0, r_buffer,
-			(m->s.env->cfg->log_destaddr?(void*)r->query_reply.c->socket->addr->ai_addr:NULL),
+			(m->s.env->cfg->log_destaddr?(void*)r->query_reply.c->socket->addr:NULL),
 			r->query_reply.c->type);
 	}
 }
@@ -1464,12 +1502,32 @@ void mesh_query_done(struct mesh_state* mstate)
 		&& mstate->s.env->cfg->log_servfail
 		&& !mstate->s.env->cfg->val_log_squelch) {
 			char* err = errinf_to_str_servfail(&mstate->s);
-			if(err)
-				log_err("%s", err);
-			free(err);
+			if(err) { log_err("%s", err); }
 		}
 	}
 	for(r = mstate->reply_list; r; r = r->next) {
+		struct timeval old;
+		timeval_subtract(&old, mstate->s.env->now_tv, &r->start_time);
+		if(mstate->s.env->cfg->discard_timeout != 0 &&
+			((int)old.tv_sec)*1000+((int)old.tv_usec)/1000 >
+			mstate->s.env->cfg->discard_timeout) {
+			/* Drop the reply, it is too old */
+			/* briefly set the reply_list to NULL, so that the
+			 * tcp req info cleanup routine that calls the mesh
+			 * to deregister the meshstate for it is not done
+			 * because the list is NULL and also accounting is not
+			 * done there, but instead we do that here. */
+			struct mesh_reply* reply_list = mstate->reply_list;
+			verbose(VERB_ALGO, "drop reply, it is older than discard-timeout");
+			infra_wait_limit_dec(mstate->s.env->infra_cache,
+				&r->query_reply, mstate->s.env->cfg);
+			mstate->reply_list = NULL;
+			comm_point_drop_reply(&r->query_reply);
+			mstate->reply_list = reply_list;
+			mstate->s.env->mesh->stats_dropped++;
+			continue;
+		}
+
 		i++;
 		tv = r->start_time;
 
@@ -1493,6 +1551,8 @@ void mesh_query_done(struct mesh_state* mstate)
 			 * because the list is NULL and also accounting is not
 			 * done there, but instead we do that here. */
 			struct mesh_reply* reply_list = mstate->reply_list;
+			infra_wait_limit_dec(mstate->s.env->infra_cache,
+				&r->query_reply, mstate->s.env->cfg);
 			mstate->reply_list = NULL;
 			comm_point_drop_reply(&r->query_reply);
 			mstate->reply_list = reply_list;
@@ -2025,6 +2085,8 @@ void mesh_state_remove_reply(struct mesh_area* mesh, struct mesh_state* m,
 			/* delete it, but allocated in m region */
 			log_assert(mesh->num_reply_addrs > 0);
 			mesh->num_reply_addrs--;
+			infra_wait_limit_dec(mesh->env->infra_cache,
+				&n->query_reply, mesh->env->cfg);
 
 			/* prev = prev; */
 			n = n->next;
@@ -2165,6 +2227,28 @@ mesh_serve_expired_callback(void* arg)
 		log_dns_msg("Serve expired lookup", &qstate->qinfo, msg->rep);
 
 	for(r = mstate->reply_list; r; r = r->next) {
+		struct timeval old;
+		timeval_subtract(&old, mstate->s.env->now_tv, &r->start_time);
+		if(mstate->s.env->cfg->discard_timeout != 0 &&
+			((int)old.tv_sec)*1000+((int)old.tv_usec)/1000 >
+			mstate->s.env->cfg->discard_timeout) {
+			/* Drop the reply, it is too old */
+			/* briefly set the reply_list to NULL, so that the
+			 * tcp req info cleanup routine that calls the mesh
+			 * to deregister the meshstate for it is not done
+			 * because the list is NULL and also accounting is not
+			 * done there, but instead we do that here. */
+			struct mesh_reply* reply_list = mstate->reply_list;
+			verbose(VERB_ALGO, "drop reply, it is older than discard-timeout");
+			infra_wait_limit_dec(mstate->s.env->infra_cache,
+				&r->query_reply, mstate->s.env->cfg);
+			mstate->reply_list = NULL;
+			comm_point_drop_reply(&r->query_reply);
+			mstate->reply_list = reply_list;
+			mstate->s.env->mesh->stats_dropped++;
+			continue;
+		}
+
 		i++;
 		tv = r->start_time;
 
@@ -2192,6 +2276,8 @@ mesh_serve_expired_callback(void* arg)
 			r, r_buffer, prev, prev_buffer);
 		if(r->query_reply.c->tcp_req_info)
 			tcp_req_info_remove_mesh_state(r->query_reply.c->tcp_req_info, mstate);
+		infra_wait_limit_dec(mstate->s.env->infra_cache,
+			&r->query_reply, mstate->s.env->cfg);
 		prev = r;
 		prev_buffer = r_buffer;
 	}
@@ -2238,6 +2324,14 @@ mesh_serve_expired_callback(void* arg)
 	}
 }
 
+void
+mesh_respond_serve_expired(struct mesh_state* mstate)
+{
+	if(!mstate->s.serve_expired_data)
+		mesh_serve_expired_init(mstate, -1);
+	mesh_serve_expired_callback(mstate);
+}
+
 int mesh_jostle_exceeded(struct mesh_area* mesh)
 {
 	if(mesh->all.count < mesh->max_reply_states)
diff --git a/usr.sbin/unbound/services/mesh.h b/usr.sbin/unbound/services/mesh.h
index d926cfc9dec..5bd53e065e8 100644
--- a/usr.sbin/unbound/services/mesh.h
+++ b/usr.sbin/unbound/services/mesh.h
@@ -690,4 +690,10 @@ mesh_serve_expired_lookup(struct module_qstate* qstate,
  */
 int mesh_jostle_exceeded(struct mesh_area* mesh);
 
+/**
+ * Give the serve expired responses.
+ * @param mstate: mesh state for query that has serve_expired_data.
+ */
+void mesh_respond_serve_expired(struct mesh_state* mstate);
+
 #endif /* SERVICES_MESH_H */
diff --git a/usr.sbin/unbound/services/view.h b/usr.sbin/unbound/services/view.h
index 17778100474..12f7a64e717 100644
--- a/usr.sbin/unbound/services/view.h
+++ b/usr.sbin/unbound/services/view.h
@@ -126,7 +126,8 @@ void view_delete(struct view* v);
  */
 void views_print(struct views* v);
 
-/* Find a view by name.
+/**
+ * Find a view by name.
  * @param vs: views
  * @param name: name of the view we are looking for
  * @param write: 1 for obtaining write lock on found view, 0 for read lock
diff --git a/usr.sbin/unbound/smallapp/unbound-anchor.c b/usr.sbin/unbound/smallapp/unbound-anchor.c
index f8bce83082b..ac9fe63599d 100644
--- a/usr.sbin/unbound/smallapp/unbound-anchor.c
+++ b/usr.sbin/unbound/smallapp/unbound-anchor.c
@@ -1839,15 +1839,49 @@ verify_p7sig(BIO* data, BIO* p7s, STACK_OF(X509)* trust, const char* p7signer)
 	return secure;
 }
 
+/** open a temp file */
+static FILE*
+tempfile_open(char* tempf, size_t tempflen, const char* fname, const char* mode)
+{
+	snprintf(tempf, tempflen, "%s~", fname);
+	return fopen(tempf, mode);
+}
+
+/** close an open temp file and replace the original with it */
+static void
+tempfile_close(FILE* fd, const char* tempf, const char* fname)
+{
+	fflush(fd);
+#ifdef HAVE_FSYNC
+	fsync(fileno(fd));
+#else
+	FlushFileBuffers((HANDLE)_get_osfhandle(_fileno(fd)));
+#endif
+	if(fclose(fd) != 0) {
+		printf("could not complete write: %s: %s\n",
+			tempf, strerror(errno));
+		unlink(tempf);
+		return;
+	}
+	/* success; overwrite actual file */
+#ifdef USE_WINSOCK
+	(void)unlink(fname); /* windows does not replace file with rename() */
+#endif
+	if(rename(tempf, fname) < 0) {
+		printf("rename(%s to %s): %s", tempf, fname, strerror(errno));
+	}
+}
+
 /** write unsigned root anchor file, a 5011 revoked tp */
 static void
 write_unsigned_root(const char* root_anchor_file)
 {
 	FILE* out;
 	time_t now = time(NULL);
-	out = fopen(root_anchor_file, "w");
+	char tempf[2048];
+	out = tempfile_open(tempf, sizeof(tempf), root_anchor_file, "w");
 	if(!out) {
-		if(verb) printf("%s: %s\n", root_anchor_file, strerror(errno));
+		if(verb) printf("%s: %s\n", tempf, strerror(errno));
 		return;
 	}
 	if(fprintf(out, "; autotrust trust anchor file\n"
@@ -1862,13 +1896,7 @@ write_unsigned_root(const char* root_anchor_file)
 			root_anchor_file);
 		if(verb && errno != 0) printf("%s\n", strerror(errno));
 	}
-	fflush(out);
-#ifdef HAVE_FSYNC
-	fsync(fileno(out));
-#else
-	FlushFileBuffers((HANDLE)_get_osfhandle(_fileno(out)));
-#endif
-	fclose(out);
+	tempfile_close(out, tempf, root_anchor_file);
 }
 
 /** write root anchor file */
@@ -1878,29 +1906,24 @@ write_root_anchor(const char* root_anchor_file, BIO* ds)
 	char* pp = NULL;
 	int len;
 	FILE* out;
+	char tempf[2048];
 	(void)BIO_seek(ds, 0);
 	len = BIO_get_mem_data(ds, &pp);
 	if(!len || !pp) {
 		if(verb) printf("out of memory\n");
 		return;
 	}
-	out = fopen(root_anchor_file, "w");
+	out = tempfile_open(tempf, sizeof(tempf), root_anchor_file, "w");
 	if(!out) {
-		if(verb) printf("%s: %s\n", root_anchor_file, strerror(errno));
+		if(verb) printf("%s: %s\n", tempf, strerror(errno));
 		return;
 	}
 	if(fwrite(pp, (size_t)len, 1, out) != 1) {
 		if(verb) printf("failed to write all data to %s\n",
-			root_anchor_file);
+			tempf);
 		if(verb && errno != 0) printf("%s\n", strerror(errno));
 	}
-	fflush(out);
-#ifdef HAVE_FSYNC
-	fsync(fileno(out));
-#else
-	FlushFileBuffers((HANDLE)_get_osfhandle(_fileno(out)));
-#endif
-	fclose(out);
+	tempfile_close(out, tempf, root_anchor_file);
 }
 
 /** Perform the verification and update of the trustanchor file */
@@ -2044,18 +2067,19 @@ try_read_anchor(const char* file)
 static void
 write_builtin_anchor(const char* file)
 {
+	char tempf[2048];
 	const char* builtin_root_anchor = get_builtin_ds();
-	FILE* out = fopen(file, "w");
+	FILE* out = tempfile_open(tempf, sizeof(tempf), file, "w");
 	if(!out) {
 		printf("could not write builtin anchor, to file %s: %s\n",
-			file, strerror(errno));
+			tempf, strerror(errno));
 		return;
 	}
 	if(!fwrite(builtin_root_anchor, strlen(builtin_root_anchor), 1, out)) {
 		printf("could not complete write builtin anchor, to file %s: %s\n",
-			file, strerror(errno));
+			tempf, strerror(errno));
 	}
-	fclose(out);
+	tempfile_close(out, tempf, file);
 }
 
 /** 
diff --git a/usr.sbin/unbound/smallapp/unbound-checkconf.c b/usr.sbin/unbound/smallapp/unbound-checkconf.c
index b359da354bb..5d7997fe076 100644
--- a/usr.sbin/unbound/smallapp/unbound-checkconf.c
+++ b/usr.sbin/unbound/smallapp/unbound-checkconf.c
@@ -88,6 +88,7 @@ usage(void)
 	printf("file	if omitted %s is used.\n", CONFIGFILE);
 	printf("-o option	print value of option to stdout.\n");
 	printf("-f 		output full pathname with chroot applied, eg. with -o pidfile.\n");
+	printf("-q 		quiet (suppress output on success).\n");
 	printf("-h		show this usage help.\n");
 	printf("Version %s\n", PACKAGE_VERSION);
 	printf("BSD licensed, see LICENSE in source package for details.\n");
@@ -969,7 +970,7 @@ check_auth(struct config_file* cfg)
 
 /** check config file */
 static void
-checkconf(const char* cfgfile, const char* opt, int final)
+checkconf(const char* cfgfile, const char* opt, int final, int quiet)
 {
 	char oldwd[4096];
 	struct config_file* cfg = config_create();
@@ -1002,7 +1003,7 @@ checkconf(const char* cfgfile, const char* opt, int final)
 	check_fwd(cfg);
 	check_hints(cfg);
 	check_auth(cfg);
-	printf("unbound-checkconf: no errors in %s\n", cfgfile);
+	if(!quiet) { printf("unbound-checkconf: no errors in %s\n", cfgfile); }
 	config_delete(cfg);
 }
 
@@ -1016,6 +1017,7 @@ int main(int argc, char* argv[])
 {
 	int c;
 	int final = 0;
+	int quiet = 0;
 	const char* f;
 	const char* opt = NULL;
 	const char* cfgfile = CONFIGFILE;
@@ -1028,7 +1030,7 @@ int main(int argc, char* argv[])
 		cfgfile = CONFIGFILE;
 #endif /* USE_WINSOCK */
 	/* parse the options */
-	while( (c=getopt(argc, argv, "fho:")) != -1) {
+	while( (c=getopt(argc, argv, "fhqo:")) != -1) {
 		switch(c) {
 		case 'f':
 			final = 1;
@@ -1036,6 +1038,9 @@ int main(int argc, char* argv[])
 		case 'o':
 			opt = optarg;
 			break;
+		case 'q':
+			quiet = 1;
+			break;
 		case '?':
 		case 'h':
 		default:
@@ -1053,7 +1058,7 @@ int main(int argc, char* argv[])
 	if (pledge("stdio rpath dns getpw", NULL) == -1)
 		fatal_exit("Could not pledge");
 
-	checkconf(f, opt, final);
+	checkconf(f, opt, final, quiet);
 	checklock_stop();
 	return 0;
 }
diff --git a/usr.sbin/unbound/smallapp/unbound-control.c b/usr.sbin/unbound/smallapp/unbound-control.c
index c4f73006196..57b0787dbee 100644
--- a/usr.sbin/unbound/smallapp/unbound-control.c
+++ b/usr.sbin/unbound/smallapp/unbound-control.c
@@ -150,12 +150,13 @@ usage(void)
 	printf("  list_local_data		list local-data RRs in use\n");
 	printf("  insecure_add zone 		add domain-insecure zone\n");
 	printf("  insecure_remove zone		remove domain-insecure zone\n");
-	printf("  forward_add [+i] zone addr..	add forward-zone with servers\n");
+	printf("  forward_add [+it] zone addr..	add forward-zone with servers\n");
 	printf("  forward_remove [+i] zone	remove forward zone\n");
-	printf("  stub_add [+ip] zone addr..	add stub-zone with servers\n");
+	printf("  stub_add [+ipt] zone addr..	add stub-zone with servers\n");
 	printf("  stub_remove [+i] zone		remove stub zone\n");
 	printf("		+i		also do dnssec insecure point\n");
 	printf("		+p		set stub to use priming\n");
+	printf("		+t		set to use tls upstream\n");
 	printf("  forward [off | addr ...]	without arg show forward setup\n");
 	printf("				or off to turn off root forwarding\n");
 	printf("				or give list of ip addresses\n");
diff --git a/usr.sbin/unbound/util/config_file.c b/usr.sbin/unbound/util/config_file.c
index c0610812111..62d1eedf90c 100644
--- a/usr.sbin/unbound/util/config_file.c
+++ b/usr.sbin/unbound/util/config_file.c
@@ -174,6 +174,7 @@ config_create(void)
 	cfg->min_ttl = 0;
 	cfg->max_ttl = 3600 * 24;
 	cfg->max_negative_ttl = 3600;
+	cfg->min_negative_ttl = 0;
 	cfg->prefetch = 0;
 	cfg->prefetch_key = 0;
 	cfg->deny_any = 0;
@@ -308,6 +309,11 @@ config_create(void)
 	cfg->minimal_responses = 1;
 	cfg->rrset_roundrobin = 1;
 	cfg->unknown_server_time_limit = 376;
+	cfg->discard_timeout = 1900; /* msec */
+	cfg->wait_limit = 1000;
+	cfg->wait_limit_cookie = 10000;
+	cfg->wait_limit_netblock = NULL;
+	cfg->wait_limit_cookie_netblock = NULL;
 	cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */
 	if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 		goto error_exit;
@@ -384,6 +390,7 @@ config_create(void)
 	if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 	if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 	cfg->cachedb_no_store = 0;
+	cfg->cachedb_check_when_serve_expired = 1;
 #ifdef USE_REDIS
 	if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
 	cfg->redis_server_path = NULL;
@@ -615,6 +622,8 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	{ IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 	else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 	{ IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
+	else if(strcmp(opt, "cache-min-negative-ttl:") == 0)
+	{ IS_NUMBER_OR_ZERO; cfg->min_negative_ttl = atoi(val); MIN_NEG_TTL=(time_t)cfg->min_negative_ttl;}
 	else if(strcmp(opt, "cache-min-ttl:") == 0)
 	{ IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 	else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
@@ -722,6 +731,9 @@ int config_set_option(struct config_file* cfg, const char* opt,
 	else S_YNO("minimal-responses:", minimal_responses)
 	else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 	else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
+	else S_NUMBER_OR_ZERO("discard-timeout:", discard_timeout)
+	else S_NUMBER_OR_ZERO("wait-limit:", wait_limit)
+	else S_NUMBER_OR_ZERO("wait-limit-cookie:", wait_limit_cookie)
 	else S_STRLIST("local-data:", local_data)
 	else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 	else S_YNO("insecure-lan-zones:", insecure_lan_zones)
@@ -827,6 +839,7 @@ int config_set_option(struct config_file* cfg, const char* opt,
 #endif
 #ifdef USE_CACHEDB
 	else S_YNO("cachedb-no-store:", cachedb_no_store)
+	else S_YNO("cachedb-check-when-serve-expired:", cachedb_check_when_serve_expired)
 #endif /* USE_CACHEDB */
 	else if(strcmp(opt, "define-tag:") ==0) {
 		return config_add_tag(cfg, val);
@@ -1065,6 +1078,7 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_YNO(opt, "deny-any", deny_any)
 	else O_DEC(opt, "cache-max-ttl", max_ttl)
 	else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
+	else O_DEC(opt, "cache-min-negative-ttl", min_negative_ttl)
 	else O_DEC(opt, "cache-min-ttl", min_ttl)
 	else O_DEC(opt, "infra-host-ttl", host_ttl)
 	else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
@@ -1201,6 +1215,11 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_YNO(opt, "minimal-responses", minimal_responses)
 	else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
 	else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
+	else O_DEC(opt, "discard-timeout", discard_timeout)
+	else O_DEC(opt, "wait-limit", wait_limit)
+	else O_DEC(opt, "wait-limit-cookie", wait_limit_cookie)
+	else O_LS2(opt, "wait-limit-netblock", wait_limit_netblock)
+	else O_LS2(opt, "wait-limit-cookie-netblock", wait_limit_cookie_netblock)
 #ifdef CLIENT_SUBNET
 	else O_LST(opt, "send-client-subnet", client_subnet)
 	else O_LST(opt, "client-subnet-zone", client_subnet_zone)
@@ -1318,6 +1337,7 @@ config_get_option(struct config_file* cfg, const char* opt,
 	else O_STR(opt, "backend", cachedb_backend)
 	else O_STR(opt, "secret-seed", cachedb_secret)
 	else O_YNO(opt, "cachedb-no-store", cachedb_no_store)
+	else O_YNO(opt, "cachedb-check-when-serve-expired", cachedb_check_when_serve_expired)
 #ifdef USE_REDIS
 	else O_STR(opt, "redis-server-host", redis_server_host)
 	else O_DEC(opt, "redis-server-port", redis_server_port)
@@ -1671,6 +1691,8 @@ config_delete(struct config_file* cfg)
 	config_deltrplstrlist(cfg->interface_tag_actions);
 	config_deltrplstrlist(cfg->interface_tag_datas);
 	config_delstrlist(cfg->control_ifs.first);
+	config_deldblstrlist(cfg->wait_limit_netblock);
+	config_deldblstrlist(cfg->wait_limit_cookie_netblock);
 	free(cfg->server_key_file);
 	free(cfg->server_cert_file);
 	free(cfg->control_key_file);
@@ -1761,6 +1783,10 @@ cfg_mark_ports(const char* str, int allow, int* avail, int num)
 #endif
 	if(!mid) {
 		int port = atoi(str);
+		if(port < 0) {
+			log_err("port number is negative: %d", port);
+			return 0;
+		}
 		if(port == 0 && strcmp(str, "0") != 0) {
 			log_err("cannot parse port number '%s'", str);
 			return 0;
@@ -1770,6 +1796,10 @@ cfg_mark_ports(const char* str, int allow, int* avail, int num)
 	} else {
 		int i, low, high = atoi(mid+1);
 		char buf[16];
+		if(high < 0) {
+			log_err("port number is negative: %d", high);
+			return 0;
+		}
 		if(high == 0 && strcmp(mid+1, "0") != 0) {
 			log_err("cannot parse port number '%s'", mid+1);
 			return 0;
@@ -1782,10 +1812,18 @@ cfg_mark_ports(const char* str, int allow, int* avail, int num)
 			memcpy(buf, str, (size_t)(mid-str));
 		buf[mid-str] = 0;
 		low = atoi(buf);
+		if(low < 0) {
+			log_err("port number is negative: %d", low);
+			return 0;
+		}
 		if(low == 0 && strcmp(buf, "0") != 0) {
 			log_err("cannot parse port number '%s'", buf);
 			return 0;
 		}
+		if(high > num) {
+			/* Stop very high values from taking a long time. */
+			high = num;
+		}
 		for(i=low; i<=high; i++) {
 			if(i < num)
 				avail[i] = (allow?i:0);
@@ -2310,6 +2348,7 @@ config_apply(struct config_file* config)
 	SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
 	SERVE_ORIGINAL_TTL = config->serve_original_ttl;
 	MAX_NEG_TTL = (time_t)config->max_negative_ttl;
+	MIN_NEG_TTL = (time_t)config->min_negative_ttl;
 	RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
 	RTT_MAX_TIMEOUT = config->infra_cache_max_rtt;
 	EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
diff --git a/usr.sbin/unbound/util/config_file.h b/usr.sbin/unbound/util/config_file.h
index 491109833e4..d3a2e268c49 100644
--- a/usr.sbin/unbound/util/config_file.h
+++ b/usr.sbin/unbound/util/config_file.h
@@ -315,6 +315,8 @@ struct config_file {
 	int min_ttl;
 	/** the number of seconds maximal negative TTL for SOA in auth */
 	int max_negative_ttl;
+	/** the number of seconds minimal negative TTL for SOA in auth */
+	int min_negative_ttl;
 	/** if prefetching of messages should be performed. */
 	int prefetch;
 	/** if prefetching of DNSKEYs should be performed. */
@@ -535,6 +537,21 @@ struct config_file {
 	/* wait time for unknown server in msec */
 	int unknown_server_time_limit;
 
+	/** Wait time to drop recursion replies */
+	int discard_timeout;
+
+	/** Wait limit for number of replies per IP address */
+	int wait_limit;
+
+	/** Wait limit for number of replies per IP address with cookie */
+	int wait_limit_cookie;
+
+	/** wait limit per netblock */
+	struct config_str2list* wait_limit_netblock;
+
+	/** wait limit with cookie per netblock */
+	struct config_str2list* wait_limit_cookie_netblock;
+
 	/* maximum UDP response size */
 	size_t max_udp_size;
 
@@ -705,6 +722,8 @@ struct config_file {
 	char* cachedb_secret;
 	/** cachedb that does not store, but only reads from database, if on */
 	int cachedb_no_store;
+	/** cachedb check before serving serve-expired response */
+	int cachedb_check_when_serve_expired;
 #ifdef USE_REDIS
 	/** redis server's IP address or host name */
 	char* redis_server_host;
diff --git a/usr.sbin/unbound/util/configlexer.lex b/usr.sbin/unbound/util/configlexer.lex
index e1ab76e2556..7ae1b8c38f4 100644
--- a/usr.sbin/unbound/util/configlexer.lex
+++ b/usr.sbin/unbound/util/configlexer.lex
@@ -297,6 +297,7 @@ rrset-cache-size{COLON}		{ YDVAR(1, VAR_RRSET_CACHE_SIZE) }
 rrset-cache-slabs{COLON}	{ YDVAR(1, VAR_RRSET_CACHE_SLABS) }
 cache-max-ttl{COLON}     	{ YDVAR(1, VAR_CACHE_MAX_TTL) }
 cache-max-negative-ttl{COLON}   { YDVAR(1, VAR_CACHE_MAX_NEGATIVE_TTL) }
+cache-min-negative-ttl{COLON}   { YDVAR(1, VAR_CACHE_MIN_NEGATIVE_TTL) }
 cache-min-ttl{COLON}     	{ YDVAR(1, VAR_CACHE_MIN_TTL) }
 infra-host-ttl{COLON}		{ YDVAR(1, VAR_INFRA_HOST_TTL) }
 infra-lame-ttl{COLON}		{ YDVAR(1, VAR_INFRA_LAME_TTL) }
@@ -463,6 +464,11 @@ domain-insecure{COLON}		{ YDVAR(1, VAR_DOMAIN_INSECURE) }
 minimal-responses{COLON}	{ YDVAR(1, VAR_MINIMAL_RESPONSES) }
 rrset-roundrobin{COLON}		{ YDVAR(1, VAR_RRSET_ROUNDROBIN) }
 unknown-server-time-limit{COLON} { YDVAR(1, VAR_UNKNOWN_SERVER_TIME_LIMIT) }
+discard-timeout{COLON}		{ YDVAR(1, VAR_DISCARD_TIMEOUT) }
+wait-limit{COLON}		{ YDVAR(1, VAR_WAIT_LIMIT) }
+wait-limit-cookie{COLON}	{ YDVAR(1, VAR_WAIT_LIMIT_COOKIE) }
+wait-limit-netblock{COLON}	{ YDVAR(1, VAR_WAIT_LIMIT_NETBLOCK) }
+wait-limit-cookie-netblock{COLON} { YDVAR(1, VAR_WAIT_LIMIT_COOKIE_NETBLOCK) }
 max-udp-size{COLON}		{ YDVAR(1, VAR_MAX_UDP_SIZE) }
 dns64-prefix{COLON}		{ YDVAR(1, VAR_DNS64_PREFIX) }
 dns64-synthall{COLON}		{ YDVAR(1, VAR_DNS64_SYNTHALL) }
@@ -560,6 +566,7 @@ cachedb{COLON}			{ YDVAR(0, VAR_CACHEDB) }
 backend{COLON}			{ YDVAR(1, VAR_CACHEDB_BACKEND) }
 secret-seed{COLON}		{ YDVAR(1, VAR_CACHEDB_SECRETSEED) }
 cachedb-no-store{COLON}		{ YDVAR(1, VAR_CACHEDB_NO_STORE) }
+cachedb-check-when-serve-expired{COLON}		{ YDVAR(1, VAR_CACHEDB_CHECK_WHEN_SERVE_EXPIRED) }
 redis-server-host{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISHOST) }
 redis-server-port{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISPORT) }
 redis-server-path{COLON}	{ YDVAR(1, VAR_CACHEDB_REDISPATH) }
diff --git a/usr.sbin/unbound/util/configparser.y b/usr.sbin/unbound/util/configparser.y
index 0e4cd5960a2..0feeb61b168 100644
--- a/usr.sbin/unbound/util/configparser.y
+++ b/usr.sbin/unbound/util/configparser.y
@@ -153,6 +153,7 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_MIN_CLIENT_SUBNET_IPV4 VAR_MIN_CLIENT_SUBNET_IPV6
 %token VAR_MAX_ECS_TREE_SIZE_IPV4 VAR_MAX_ECS_TREE_SIZE_IPV6
 %token VAR_CAPS_WHITELIST VAR_CACHE_MAX_NEGATIVE_TTL VAR_PERMIT_SMALL_HOLDDOWN
+%token VAR_CACHE_MIN_NEGATIVE_TTL
 %token VAR_QNAME_MINIMISATION VAR_QNAME_MINIMISATION_STRICT VAR_IP_FREEBIND
 %token VAR_DEFINE_TAG VAR_LOCAL_ZONE_TAG VAR_ACCESS_CONTROL_TAG
 %token VAR_LOCAL_ZONE_OVERRIDE VAR_ACCESS_CONTROL_TAG_ACTION
@@ -188,6 +189,8 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_ANSWER_COOKIE VAR_COOKIE_SECRET VAR_IP_RATELIMIT_COOKIE
 %token VAR_FORWARD_NO_CACHE VAR_STUB_NO_CACHE VAR_LOG_SERVFAIL VAR_DENY_ANY
 %token VAR_UNKNOWN_SERVER_TIME_LIMIT VAR_LOG_TAG_QUERYREPLY
+%token VAR_DISCARD_TIMEOUT VAR_WAIT_LIMIT VAR_WAIT_LIMIT_COOKIE
+%token VAR_WAIT_LIMIT_NETBLOCK VAR_WAIT_LIMIT_COOKIE_NETBLOCK
 %token VAR_STREAM_WAIT_SIZE VAR_TLS_CIPHERS VAR_TLS_CIPHERSUITES VAR_TLS_USE_SNI
 %token VAR_IPSET VAR_IPSET_NAME_V4 VAR_IPSET_NAME_V6
 %token VAR_TLS_SESSION_TICKET_KEYS VAR_RPZ VAR_TAGS VAR_RPZ_ACTION_OVERRIDE
@@ -200,7 +203,7 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_INTERFACE_TAG_ACTION VAR_INTERFACE_TAG_DATA
 %token VAR_PROXY_PROTOCOL_PORT VAR_STATISTICS_INHIBIT_ZERO
 %token VAR_HARDEN_UNKNOWN_ADDITIONAL VAR_DISABLE_EDNS_DO VAR_CACHEDB_NO_STORE
-%token VAR_LOG_DESTADDR
+%token VAR_LOG_DESTADDR VAR_CACHEDB_CHECK_WHEN_SERVE_EXPIRED
 
 %%
 toplevelvars: /* empty */ | toplevelvars toplevelvar ;
@@ -298,6 +301,7 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_min_client_subnet_ipv4 | server_min_client_subnet_ipv6 |
 	server_max_ecs_tree_size_ipv4 | server_max_ecs_tree_size_ipv6 |
 	server_caps_whitelist | server_cache_max_negative_ttl |
+	server_cache_min_negative_ttl |
 	server_permit_small_holddown | server_qname_minimisation |
 	server_ip_freebind | server_define_tag | server_local_zone_tag |
 	server_disable_dnssec_lame_check | server_access_control_tag |
@@ -325,6 +329,8 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_fast_server_permil | server_fast_server_num  | server_tls_win_cert |
 	server_tcp_connection_limit | server_log_servfail | server_deny_any |
 	server_unknown_server_time_limit | server_log_tag_queryreply |
+	server_discard_timeout | server_wait_limit | server_wait_limit_cookie |
+	server_wait_limit_netblock | server_wait_limit_cookie_netblock |
 	server_stream_wait_size | server_tls_ciphers |
 	server_tls_ciphersuites | server_tls_session_ticket_keys |
 	server_answer_cookie | server_cookie_secret | server_ip_ratelimit_cookie |
@@ -2014,6 +2020,15 @@ server_cache_max_negative_ttl: VAR_CACHE_MAX_NEGATIVE_TTL STRING_ARG
 		free($2);
 	}
 	;
+server_cache_min_negative_ttl: VAR_CACHE_MIN_NEGATIVE_TTL STRING_ARG
+	{
+		OUTYY(("P(server_cache_min_negative_ttl:%s)\n", $2));
+		if(atoi($2) == 0 && strcmp($2, "0") != 0)
+			yyerror("number expected");
+		else cfg_parser->cfg->min_negative_ttl = atoi($2);
+		free($2);
+	}
+	;
 server_cache_min_ttl: VAR_CACHE_MIN_TTL STRING_ARG
 	{
 		OUTYY(("P(server_cache_min_ttl:%s)\n", $2));
@@ -2366,6 +2381,57 @@ server_unknown_server_time_limit: VAR_UNKNOWN_SERVER_TIME_LIMIT STRING_ARG
 		free($2);
 	}
 	;
+server_discard_timeout: VAR_DISCARD_TIMEOUT STRING_ARG
+	{
+		OUTYY(("P(server_discard_timeout:%s)\n", $2));
+		cfg_parser->cfg->discard_timeout = atoi($2);
+		free($2);
+	}
+	;
+server_wait_limit: VAR_WAIT_LIMIT STRING_ARG
+	{
+		OUTYY(("P(server_wait_limit:%s)\n", $2));
+		cfg_parser->cfg->wait_limit = atoi($2);
+		free($2);
+	}
+	;
+server_wait_limit_cookie: VAR_WAIT_LIMIT_COOKIE STRING_ARG
+	{
+		OUTYY(("P(server_wait_limit_cookie:%s)\n", $2));
+		cfg_parser->cfg->wait_limit_cookie = atoi($2);
+		free($2);
+	}
+	;
+server_wait_limit_netblock: VAR_WAIT_LIMIT_NETBLOCK STRING_ARG STRING_ARG
+	{
+		OUTYY(("P(server_wait_limit_netblock:%s %s)\n", $2, $3));
+		if(atoi($3) == 0 && strcmp($3, "0") != 0) {
+			yyerror("number expected");
+			free($2);
+			free($3);
+		} else {
+			if(!cfg_str2list_insert(&cfg_parser->cfg->
+				wait_limit_netblock, $2, $3))
+				fatal_exit("out of memory adding "
+					"wait-limit-netblock");
+		}
+	}
+	;
+server_wait_limit_cookie_netblock: VAR_WAIT_LIMIT_COOKIE_NETBLOCK STRING_ARG STRING_ARG
+	{
+		OUTYY(("P(server_wait_limit_cookie_netblock:%s %s)\n", $2, $3));
+		if(atoi($3) == 0 && strcmp($3, "0") != 0) {
+			yyerror("number expected");
+			free($2);
+			free($3);
+		} else {
+			if(!cfg_str2list_insert(&cfg_parser->cfg->
+				wait_limit_cookie_netblock, $2, $3))
+				fatal_exit("out of memory adding "
+					"wait-limit-cookie-netblock");
+		}
+	}
+	;
 server_max_udp_size: VAR_MAX_UDP_SIZE STRING_ARG
 	{
 		OUTYY(("P(server_max_udp_size:%s)\n", $2));
@@ -3723,7 +3789,7 @@ contents_cachedb: contents_cachedb content_cachedb
 content_cachedb: cachedb_backend_name | cachedb_secret_seed |
 	redis_server_host | redis_server_port | redis_timeout |
 	redis_expire_records | redis_server_path | redis_server_password |
-	cachedb_no_store | redis_logical_db
+	cachedb_no_store | redis_logical_db | cachedb_check_when_serve_expired
 	;
 cachedb_backend_name: VAR_CACHEDB_BACKEND STRING_ARG
 	{
@@ -3762,6 +3828,19 @@ cachedb_no_store: VAR_CACHEDB_NO_STORE STRING_ARG
 		free($2);
 	}
 	;
+cachedb_check_when_serve_expired: VAR_CACHEDB_CHECK_WHEN_SERVE_EXPIRED STRING_ARG
+	{
+	#ifdef USE_CACHEDB
+		OUTYY(("P(cachedb_check_when_serve_expired:%s)\n", $2));
+		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
+			yyerror("expected yes or no.");
+		else cfg_parser->cfg->cachedb_check_when_serve_expired = (strcmp($2, "yes")==0);
+	#else
+		OUTYY(("P(Compiled without cachedb, ignoring)\n"));
+	#endif
+		free($2);
+	}
+	;
 redis_server_host: VAR_CACHEDB_REDISHOST STRING_ARG
 	{
 	#if defined(USE_CACHEDB) && defined(USE_REDIS)
diff --git a/usr.sbin/unbound/util/data/msgparse.h b/usr.sbin/unbound/util/data/msgparse.h
index 8e5c94a28cb..656e0d285dc 100644
--- a/usr.sbin/unbound/util/data/msgparse.h
+++ b/usr.sbin/unbound/util/data/msgparse.h
@@ -82,6 +82,8 @@ extern time_t MAX_TTL;
 extern time_t MIN_TTL;
 /** Maximum Negative TTL that is allowed */
 extern time_t MAX_NEG_TTL;
+/** Minimum Negative TTL that is allowed */
+extern time_t MIN_NEG_TTL;
 /** If we serve expired entries and prefetch them */
 extern int SERVE_EXPIRED;
 /** Time to serve records after expiration */
diff --git a/usr.sbin/unbound/util/data/msgreply.c b/usr.sbin/unbound/util/data/msgreply.c
index 2286d46bc3f..c9d7bbf3ad4 100644
--- a/usr.sbin/unbound/util/data/msgreply.c
+++ b/usr.sbin/unbound/util/data/msgreply.c
@@ -61,6 +61,8 @@ time_t MAX_TTL = 3600 * 24 * 10; /* ten days */
 time_t MIN_TTL = 0;
 /** MAX Negative TTL, for SOA records in authority section */
 time_t MAX_NEG_TTL = 3600; /* one hour */
+/** MIN Negative TTL, for SOA records in authority section */
+time_t MIN_NEG_TTL = 0;
 /** If we serve expired entries and prefetch them */
 int SERVE_EXPIRED = 0;
 /** Time to serve records after expiration */
@@ -223,18 +225,25 @@ rdata_copy(sldns_buffer* pkt, struct packed_rrset_data* data, uint8_t* to,
 	if(type == LDNS_RR_TYPE_SOA && section == LDNS_SECTION_AUTHORITY) {
 		/* negative response. see if TTL of SOA record larger than the
 		 * minimum-ttl in the rdata of the SOA record */
-		if(*rr_ttl > soa_find_minttl(rr))
-			*rr_ttl = soa_find_minttl(rr);
-	}
-	if(!SERVE_ORIGINAL_TTL && (*rr_ttl < MIN_TTL))
-		*rr_ttl = MIN_TTL;
-	if(!SERVE_ORIGINAL_TTL && (*rr_ttl > MAX_TTL))
-		*rr_ttl = MAX_TTL;
-	if(type == LDNS_RR_TYPE_SOA && section == LDNS_SECTION_AUTHORITY) {
-		/* max neg ttl overrides the min and max ttl of everything
-		 * else, it is for a more specific record */
-		if(*rr_ttl > MAX_NEG_TTL)
-			*rr_ttl = MAX_NEG_TTL;
+		if(*rr_ttl > soa_find_minttl(rr)) *rr_ttl = soa_find_minttl(rr);
+		if(!SERVE_ORIGINAL_TTL) {
+			/* If MIN_NEG_TTL is configured skip setting MIN_TTL */
+			if(MIN_NEG_TTL <= 0 && *rr_ttl < MIN_TTL) {
+				*rr_ttl = MIN_TTL;
+			}
+			if(*rr_ttl > MAX_TTL) *rr_ttl = MAX_TTL;
+		}
+		/* MAX_NEG_TTL overrides the min and max ttl of everything
+		 * else; it is for a more specific record */
+		if(*rr_ttl > MAX_NEG_TTL) *rr_ttl = MAX_NEG_TTL;
+		/* MIN_NEG_TTL overrides the min and max ttl of everything
+		 * else if configured; it is for a more specific record */
+		if(MIN_NEG_TTL > 0 && *rr_ttl < MIN_NEG_TTL) {
+			*rr_ttl = MIN_NEG_TTL;
+		}
+	} else if(!SERVE_ORIGINAL_TTL) {
+		if(*rr_ttl < MIN_TTL) *rr_ttl = MIN_TTL;
+		if(*rr_ttl > MAX_TTL) *rr_ttl = MAX_TTL;
 	}
 	if(*rr_ttl < data->ttl)
 		data->ttl = *rr_ttl;
diff --git a/usr.sbin/unbound/util/module.c b/usr.sbin/unbound/util/module.c
index 62e5de4a05b..90a155b5e8a 100644
--- a/usr.sbin/unbound/util/module.c
+++ b/usr.sbin/unbound/util/module.c
@@ -129,7 +129,7 @@ void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
 	}
 }
 
-char* errinf_to_str_bogus(struct module_qstate* qstate)
+char* errinf_to_str_bogus(struct module_qstate* qstate, struct regional* region)
 {
 	char buf[20480];
 	char* p = buf;
@@ -148,7 +148,10 @@ char* errinf_to_str_bogus(struct module_qstate* qstate)
 		snprintf(p, left, " %s", s->str);
 		left -= strlen(p); p += strlen(p);
 	}
-	p = strdup(buf);
+	if(region)
+		p = regional_strdup(region, buf);
+	else
+		p = strdup(buf);
 	if(!p)
 		log_err("malloc failure in errinf_to_str");
 	return p;
@@ -188,7 +191,7 @@ char* errinf_to_str_servfail(struct module_qstate* qstate)
 		snprintf(p, left, " %s", s->str);
 		left -= strlen(p); p += strlen(p);
 	}
-	p = strdup(buf);
+	p = regional_strdup(qstate->region, buf);
 	if(!p)
 		log_err("malloc failure in errinf_to_str");
 	return p;
@@ -206,7 +209,7 @@ char* errinf_to_str_misc(struct module_qstate* qstate)
 		snprintf(p, left, "%s%s", (s==qstate->errinf?"":" "), s->str);
 		left -= strlen(p); p += strlen(p);
 	}
-	p = strdup(buf);
+	p = regional_strdup(qstate->region, buf);
 	if(!p)
 		log_err("malloc failure in errinf_to_str");
 	return p;
diff --git a/usr.sbin/unbound/util/module.h b/usr.sbin/unbound/util/module.h
index 8a9da3f931a..c9df7462491 100644
--- a/usr.sbin/unbound/util/module.h
+++ b/usr.sbin/unbound/util/module.h
@@ -180,6 +180,7 @@ struct iter_hints;
 struct respip_set;
 struct respip_client_info;
 struct respip_addr_info;
+struct module_stack;
 
 /** Maximum number of modules in operation */
 #define MAX_MODULE 16
@@ -511,10 +512,10 @@ struct module_env {
 	/** auth zones */
 	struct auth_zones* auth_zones;
 	/** Mapping of forwarding zones to targets.
-	 * iterator forwarder information. per-thread, created by worker */
+	 * iterator forwarder information. */
 	struct iter_forwards* fwds;
 	/** 
-	 * iterator forwarder information. per-thread, created by worker.
+	 * iterator stub information.
 	 * The hints -- these aren't stored in the cache because they don't 
 	 * expire. The hints are always used to "prime" the cache. Note 
 	 * that both root hints and stub zone "hints" are stored in this 
@@ -537,6 +538,12 @@ struct module_env {
 	/** EDNS client string information */
 	struct edns_strings* edns_strings;
 
+	/** module stack */
+	struct module_stack* modstack;
+#ifdef USE_CACHEDB
+	/** the cachedb enabled value, copied and stored here. */
+	int cachedb_enabled;
+#endif
 	/* Make every mesh state unique, do not aggregate mesh states. */
 	int unique_mesh;
 };
@@ -824,10 +831,11 @@ void errinf_dname(struct module_qstate* qstate, const char* str,
 /**
  * Create error info in string.  For validation failures.
  * @param qstate: query state.
+ * @param region: the region for the result or NULL for malloced result.
  * @return string or NULL on malloc failure (already logged).
- *    This string is malloced and has to be freed by caller.
+ *    This string is malloced if region is NULL and has to be freed by caller.
  */
-char* errinf_to_str_bogus(struct module_qstate* qstate);
+char* errinf_to_str_bogus(struct module_qstate* qstate, struct regional* region);
 
 /**
  * Check the sldns_ede_code of the qstate->errinf.
@@ -840,7 +848,6 @@ sldns_ede_code errinf_to_reason_bogus(struct module_qstate* qstate);
  * Create error info in string.  For other servfails.
  * @param qstate: query state.
  * @return string or NULL on malloc failure (already logged).
- *    This string is malloced and has to be freed by caller.
  */
 char* errinf_to_str_servfail(struct module_qstate* qstate);
 
@@ -848,7 +855,6 @@ char* errinf_to_str_servfail(struct module_qstate* qstate);
  * Create error info in string.  For misc failures that are not servfail.
  * @param qstate: query state.
  * @return string or NULL on malloc failure (already logged).
- *    This string is malloced and has to be freed by caller.
  */
 char* errinf_to_str_misc(struct module_qstate* qstate);
 
diff --git a/usr.sbin/unbound/util/net_help.c b/usr.sbin/unbound/util/net_help.c
index 8970247926d..d2218ea8833 100644
--- a/usr.sbin/unbound/util/net_help.c
+++ b/usr.sbin/unbound/util/net_help.c
@@ -77,6 +77,8 @@
 
 /** max length of an IP address (the address portion) that we allow */
 #define MAX_ADDR_STRLEN 128 /* characters */
+/** max length of a hostname (with port and tls name) that we allow */
+#define MAX_HOST_STRLEN (LDNS_MAX_DOMAINLEN * 3) /* characters */
 /** default value for EDNS ADVERTISED size */
 uint16_t EDNS_ADVERTISED_SIZE = 4096;
 
@@ -486,28 +488,38 @@ uint8_t* authextstrtodname(char* str, int* port, char** auth_name)
 	*port = UNBOUND_DNS_PORT;
 	*auth_name = NULL;
 	if((s=strchr(str, '@'))) {
+		char buf[MAX_HOST_STRLEN];
+		size_t len = (size_t)(s-str);
 		char* hash = strchr(s+1, '#');
 		if(hash) {
 			*auth_name = hash+1;
 		} else {
 			*auth_name = NULL;
 		}
+		if(len >= MAX_HOST_STRLEN) {
+			return NULL;
+		}
+		(void)strlcpy(buf, str, sizeof(buf));
+		buf[len] = 0;
 		*port = atoi(s+1);
 		if(*port == 0) {
 			if(!hash && strcmp(s+1,"0")!=0)
-				return 0;
+				return NULL;
 			if(hash && strncmp(s+1,"0#",2)!=0)
-				return 0;
+				return NULL;
 		}
-		*s = 0;
-		dname = sldns_str2wire_dname(str, &dname_len);
-		*s = '@';
+		dname = sldns_str2wire_dname(buf, &dname_len);
 	} else if((s=strchr(str, '#'))) {
+		char buf[MAX_HOST_STRLEN];
+		size_t len = (size_t)(s-str);
+		if(len >= MAX_HOST_STRLEN) {
+			return NULL;
+		}
+		(void)strlcpy(buf, str, sizeof(buf));
+		buf[len] = 0;
 		*port = UNBOUND_DNS_OVER_TLS_PORT;
 		*auth_name = s+1;
-		*s = 0;
-		dname = sldns_str2wire_dname(str, &dname_len);
-		*s = '#';
+		dname = sldns_str2wire_dname(buf, &dname_len);
 	} else {
 		dname = sldns_str2wire_dname(str, &dname_len);
 	}
@@ -1026,11 +1038,11 @@ static void log_crypto_err_io_code_arg(const char* str, int r,
 	} else {
 		if(print_errno) {
 			if(errno == 0)
-				log_err("str: syscall error with errno %s",
-					strerror(errno));
-			else log_err("str: %s", strerror(errno));
+				log_err("%s: syscall error with errno %s",
+					str, strerror(errno));
+			else log_err("%s: %s", str, strerror(errno));
 		} else {
-			log_err("str: %s", inf);
+			log_err("%s: %s", str, inf);
 		}
 	}
 }
diff --git a/usr.sbin/unbound/util/netevent.c b/usr.sbin/unbound/util/netevent.c
index 1fc8c6b8658..980829d087e 100644
--- a/usr.sbin/unbound/util/netevent.c
+++ b/usr.sbin/unbound/util/netevent.c
@@ -4772,9 +4772,9 @@ comm_point_send_reply(struct comm_reply *repinfo)
 		 * sending src (client)/dst (local service) addresses over DNSTAP from udp callback
 		 */
 		if(repinfo->c->dtenv != NULL && repinfo->c->dtenv->log_client_response_messages) {
-			log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->socket->addr->ai_addrlen);
+			log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr, repinfo->c->socket->addrlen);
 			log_addr(VERB_ALGO, "response to client", &repinfo->client_addr, repinfo->client_addrlen);
-			dt_msg_send_client_response(repinfo->c->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->type, repinfo->c->ssl, repinfo->c->buffer);
+			dt_msg_send_client_response(repinfo->c->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr, repinfo->c->type, repinfo->c->ssl, repinfo->c->buffer);
 		}
 #endif
 	} else {
@@ -4783,9 +4783,9 @@ comm_point_send_reply(struct comm_reply *repinfo)
 		 * sending src (client)/dst (local service) addresses over DNSTAP from TCP callback
 		 */
 		if(repinfo->c->tcp_parent->dtenv != NULL && repinfo->c->tcp_parent->dtenv->log_client_response_messages) {
-			log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->socket->addr->ai_addrlen);
+			log_addr(VERB_ALGO, "from local addr", (void*)repinfo->c->socket->addr, repinfo->c->socket->addrlen);
 			log_addr(VERB_ALGO, "response to client", &repinfo->client_addr, repinfo->client_addrlen);
-			dt_msg_send_client_response(repinfo->c->tcp_parent->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr->ai_addr, repinfo->c->type, repinfo->c->ssl,
+			dt_msg_send_client_response(repinfo->c->tcp_parent->dtenv, &repinfo->client_addr, (void*)repinfo->c->socket->addr, repinfo->c->type, repinfo->c->ssl,
 				( repinfo->c->tcp_req_info? repinfo->c->tcp_req_info->spool_buffer: repinfo->c->buffer ));
 		}
 #endif
diff --git a/usr.sbin/unbound/util/netevent.h b/usr.sbin/unbound/util/netevent.h
index dc9619c163b..1e4a13f9b7e 100644
--- a/usr.sbin/unbound/util/netevent.h
+++ b/usr.sbin/unbound/util/netevent.h
@@ -181,6 +181,8 @@ struct comm_point {
 	/** if the event is added or not */
 	int event_added;
 
+	/** Reference to struct that is part of the listening ports,
+	 * where for listening ports information is kept about the address. */
 	struct unbound_socket* socket;
 
 	/** file descriptor for communication point */
diff --git a/usr.sbin/unbound/util/storage/lookup3.c b/usr.sbin/unbound/util/storage/lookup3.c
index c4026626c6d..f2a48f413da 100644
--- a/usr.sbin/unbound/util/storage/lookup3.c
+++ b/usr.sbin/unbound/util/storage/lookup3.c
@@ -89,7 +89,7 @@ on 1 byte), but shoehorning those bytes into integers efficiently is messy.
 # if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
       __BYTE_ORDER == __LITTLE_ENDIAN) || \
      (defined(i386) || defined(__i386__) || defined(__i486__) || \
-      defined(__i586__) || defined(__i686__) || defined(vax) || defined(MIPSEL) || defined(__x86))
+      defined(__i586__) || defined(__i686__) || defined(vax) || defined(MIPSEL) || defined(__x86) || defined(__loongarch__))
 #  define HASH_LITTLE_ENDIAN 1
 #  define HASH_BIG_ENDIAN 0
 # elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \
diff --git a/usr.sbin/unbound/util/storage/lruhash.c b/usr.sbin/unbound/util/storage/lruhash.c
index e17b180db8b..aba9fcc1d83 100644
--- a/usr.sbin/unbound/util/storage/lruhash.c
+++ b/usr.sbin/unbound/util/storage/lruhash.c
@@ -528,6 +528,40 @@ lruhash_setmarkdel(struct lruhash* table, lruhash_markdelfunc_type md)
 	lock_quick_unlock(&table->lock);
 }
 
+void
+lruhash_update_space_used(struct lruhash* table, void* cb_arg, int diff_size)
+{
+	struct lruhash_entry *reclaimlist = NULL;
+
+	fptr_ok(fptr_whitelist_hash_sizefunc(table->sizefunc));
+	fptr_ok(fptr_whitelist_hash_delkeyfunc(table->delkeyfunc));
+	fptr_ok(fptr_whitelist_hash_deldatafunc(table->deldatafunc));
+	fptr_ok(fptr_whitelist_hash_markdelfunc(table->markdelfunc));
+
+	if(cb_arg == NULL) cb_arg = table->cb_arg;
+
+	/* update space used */
+	lock_quick_lock(&table->lock);
+
+	if((int)table->space_used + diff_size < 0)
+		table->space_used = 0;
+	else table->space_used = (size_t)((int)table->space_used + diff_size);
+
+	if(table->space_used > table->space_max)
+		reclaim_space(table, &reclaimlist);
+
+	lock_quick_unlock(&table->lock);
+
+	/* finish reclaim if any (outside of critical region) */
+	while(reclaimlist) {
+		struct lruhash_entry* n = reclaimlist->overflow_next;
+		void* d = reclaimlist->data;
+		(*table->delkeyfunc)(reclaimlist->key, cb_arg);
+		(*table->deldatafunc)(d, cb_arg);
+		reclaimlist = n;
+	}
+}
+
 void 
 lruhash_traverse(struct lruhash* h, int wr, 
 	void (*func)(struct lruhash_entry*, void*), void* arg)
diff --git a/usr.sbin/unbound/util/storage/lruhash.h b/usr.sbin/unbound/util/storage/lruhash.h
index 2086e4dec93..5ab488beb50 100644
--- a/usr.sbin/unbound/util/storage/lruhash.h
+++ b/usr.sbin/unbound/util/storage/lruhash.h
@@ -303,6 +303,17 @@ void lru_touch(struct lruhash* table, struct lruhash_entry* entry);
  */
 void lruhash_setmarkdel(struct lruhash* table, lruhash_markdelfunc_type md);
 
+/**
+ * Update the size of an element in the hashtable.
+ *
+ * @param table: hash table.
+ * @param cb_override: if not NULL overrides the cb_arg for deletefunc.
+ * @param diff_size: difference in size to the hash table storage.
+ * 	This is newsize - oldsize, a positive number uses more space.
+ */
+void lruhash_update_space_used(struct lruhash* table, void* cb_override,
+	int diff_size);
+
 /************************* getdns functions ************************/
 /*** these are used by getdns only and not by unbound. ***/
 
diff --git a/usr.sbin/unbound/util/storage/slabhash.c b/usr.sbin/unbound/util/storage/slabhash.c
index 7d376c4d684..62396e16a82 100644
--- a/usr.sbin/unbound/util/storage/slabhash.c
+++ b/usr.sbin/unbound/util/storage/slabhash.c
@@ -166,6 +166,13 @@ int slabhash_is_size(struct slabhash* sl, size_t size, size_t slabs)
 	return 0;
 }
 
+void slabhash_update_space_used(struct slabhash* sl, hashvalue_type hash,
+	void* cb_arg, int diff_size)
+{
+	lruhash_update_space_used(sl->array[slab_idx(sl, hash)], cb_arg,
+		diff_size);
+}
+
 size_t slabhash_get_mem(struct slabhash* sl)
 {	
 	size_t i, total = sizeof(*sl);
diff --git a/usr.sbin/unbound/util/storage/slabhash.h b/usr.sbin/unbound/util/storage/slabhash.h
index dc5fc360329..089847d9359 100644
--- a/usr.sbin/unbound/util/storage/slabhash.h
+++ b/usr.sbin/unbound/util/storage/slabhash.h
@@ -162,6 +162,18 @@ size_t slabhash_get_size(struct slabhash* table);
 int slabhash_is_size(struct slabhash* table, size_t size, size_t slabs);
 
 /**
+ * Update the size of an element in the hashtable, uses
+ * lruhash_update_space_used.
+ *
+ * @param table: hash table.
+ * @param hash: hash value. User calculates the hash.
+ * @param cb_override: if not NULL overrides the cb_arg for deletefunc.
+ * @param diff_size: difference in size to the hash table storage.
+ */
+void slabhash_update_space_used(struct slabhash* table, hashvalue_type hash,
+	void* cb_override, int diff_size);
+
+/**
  * Retrieve slab hash current memory use.
  * @param table: hash table.
  * @return memory in use.
diff --git a/usr.sbin/unbound/validator/val_utils.c b/usr.sbin/unbound/validator/val_utils.c
index c316183a9d9..a7db41dadc3 100644
--- a/usr.sbin/unbound/validator/val_utils.c
+++ b/usr.sbin/unbound/validator/val_utils.c
@@ -118,7 +118,30 @@ val_classify_response(uint16_t query_flags, struct query_info* origqinf,
 	 * ANY responses are validated differently. */
 	if(rcode == LDNS_RCODE_NOERROR && qinf->qtype == LDNS_RR_TYPE_ANY)
 		return VAL_CLASS_ANY;
-	
+
+	/* For the query type DNAME, the name matters. Equal name is the
+	 * answer looked for, but a subdomain redirects the query. */
+	if(qinf->qtype == LDNS_RR_TYPE_DNAME) {
+		for(i=skip; i<rep->an_numrrsets; i++) {
+			if(rcode == LDNS_RCODE_NOERROR &&
+				ntohs(rep->rrsets[i]->rk.type)
+				== LDNS_RR_TYPE_DNAME &&
+				query_dname_compare(qinf->qname,
+				rep->rrsets[i]->rk.dname) == 0) {
+				/* type is DNAME and name is equal, it is
+				 * the answer. For the query name a subdomain
+				 * of the rrset.dname it would redirect. */
+				return VAL_CLASS_POSITIVE;
+			}
+			if(ntohs(rep->rrsets[i]->rk.type)
+				== LDNS_RR_TYPE_CNAME)
+				return VAL_CLASS_CNAME;
+		}
+		log_dns_msg("validator: error. failed to classify response message: ",
+			qinf, rep);
+		return VAL_CLASS_UNKNOWN;
+	}
+
 	/* Note that DNAMEs will be ignored here, unless qtype=DNAME. Unless
 	 * qtype=CNAME, this will yield a CNAME response. */
 	for(i=skip; i<rep->an_numrrsets; i++) {
@@ -231,6 +254,21 @@ val_find_signer(enum val_classification subtype, struct query_info* qinf,
 				rep->rrsets[i]->rk.dname) == 0) {
 				val_find_rrset_signer(rep->rrsets[i], 
 					signer_name, signer_len);
+				/* If there was no signer, and the query
+				 * was for type CNAME, and this is a CNAME,
+				 * and the previous is a DNAME, then this
+				 * is the synthesized CNAME, use the signer
+				 * of the DNAME record. */
+				if(*signer_name == NULL &&
+				   qinf->qtype == LDNS_RR_TYPE_CNAME &&
+				   ntohs(rep->rrsets[i]->rk.type) ==
+				   LDNS_RR_TYPE_CNAME && i > skip &&
+				   ntohs(rep->rrsets[i-1]->rk.type) ==
+				   LDNS_RR_TYPE_DNAME &&
+				   dname_strict_subdomain_c(rep->rrsets[i]->rk.dname, rep->rrsets[i-1]->rk.dname)) {
+					val_find_rrset_signer(rep->rrsets[i-1],
+						signer_name, signer_len);
+				}
 				return;
 			}
 		}
diff --git a/usr.sbin/unbound/validator/validator.c b/usr.sbin/unbound/validator/validator.c
index aa71df9cbf5..3cf291658e7 100644
--- a/usr.sbin/unbound/validator/validator.c
+++ b/usr.sbin/unbound/validator/validator.c
@@ -621,7 +621,6 @@ prime_trust_anchor(struct module_qstate* qstate, struct val_qstate* vq,
  * @param vq: validator query state.
  * @param env: module env for verify.
  * @param ve: validator env for verify.
- * @param qchase: query that was made.
  * @param chase_reply: answer to validate.
  * @param key_entry: the key entry, which is trusted, and which matches
  * 	the signer of the answer. The key entry isgood().
@@ -632,7 +631,7 @@ prime_trust_anchor(struct module_qstate* qstate, struct val_qstate* vq,
  */
 static int
 validate_msg_signatures(struct module_qstate* qstate, struct val_qstate* vq,
-	struct module_env* env, struct val_env* ve, struct query_info* qchase,
+	struct module_env* env, struct val_env* ve,
 	struct reply_info* chase_reply, struct key_entry_key* key_entry,
 	int* suspend)
 {
@@ -640,7 +639,7 @@ validate_msg_signatures(struct module_qstate* qstate, struct val_qstate* vq,
 	size_t i, slen;
 	struct ub_packed_rrset_key* s;
 	enum sec_status sec;
-	int dname_seen = 0, num_verifies = 0, verified, have_state = 0;
+	int num_verifies = 0, verified, have_state = 0;
 	char* reason = NULL;
 	sldns_ede_code reason_bogus = LDNS_EDE_DNSSEC_BOGUS;
 	*suspend = 0;
@@ -658,9 +657,13 @@ validate_msg_signatures(struct module_qstate* qstate, struct val_qstate* vq,
 		/* Skip the CNAME following a (validated) DNAME.
 		 * Because of the normalization routines in the iterator, 
 		 * there will always be an unsigned CNAME following a DNAME 
-		 * (unless qtype=DNAME). */
-		if(dname_seen && ntohs(s->rk.type) == LDNS_RR_TYPE_CNAME) {
-			dname_seen = 0;
+		 * (unless qtype=DNAME in the answer part). */
+		if(i>0 && ntohs(chase_reply->rrsets[i-1]->rk.type) ==
+			LDNS_RR_TYPE_DNAME &&
+			ntohs(s->rk.type) == LDNS_RR_TYPE_CNAME &&
+			((struct packed_rrset_data*)chase_reply->rrsets[i-1]->entry.data)->security == sec_status_secure &&
+			dname_strict_subdomain_c(s->rk.dname, chase_reply->rrsets[i-1]->rk.dname)
+			) {
 			/* CNAME was synthesized by our own iterator */
 			/* since the DNAME verified, mark the CNAME as secure */
 			((struct packed_rrset_data*)s->entry.data)->security =
@@ -691,12 +694,6 @@ validate_msg_signatures(struct module_qstate* qstate, struct val_qstate* vq,
 			return 0;
 		}
 
-		/* Notice a DNAME that should be followed by an unsigned 
-		 * CNAME. */
-		if(qchase->qtype != LDNS_RR_TYPE_DNAME && 
-			ntohs(s->rk.type) == LDNS_RR_TYPE_DNAME) {
-			dname_seen = 1;
-		}
 		num_verifies += verified;
 		if(num_verifies > MAX_VALIDATE_AT_ONCE &&
 			i+1 < (env->cfg->val_clean_additional?
@@ -2186,7 +2183,7 @@ processValidate(struct module_qstate* qstate, struct val_qstate* vq,
 
 	/* check signatures in the message; 
 	 * answer and authority must be valid, additional is only checked. */
-	if(!validate_msg_signatures(qstate, vq, qstate->env, ve, &vq->qchase,
+	if(!validate_msg_signatures(qstate, vq, qstate->env, ve,
 		vq->chase_reply, vq->key_entry, &suspend)) {
 		if(suspend) {
 			if(!validate_suspend_setup_timer(qstate, vq,
@@ -2456,19 +2453,12 @@ processFinished(struct module_qstate* qstate, struct val_qstate* vq,
 				log_query_info(NO_VERBOSE, "validation failure",
 					&qstate->qinfo);
 			else {
-				char* err_str = errinf_to_str_bogus(qstate);
+				char* err_str = errinf_to_str_bogus(qstate,
+					qstate->region);
 				if(err_str) {
-					size_t err_str_len = strlen(err_str);
 					log_info("%s", err_str);
-					/* allocate space and store the error
-					 * string */
-					vq->orig_msg->rep->reason_bogus_str = regional_alloc(
-						qstate->region,
-						sizeof(char) * (err_str_len+1));
-					memcpy(vq->orig_msg->rep->reason_bogus_str,
-						err_str, err_str_len+1);
+					vq->orig_msg->rep->reason_bogus_str = err_str;
 				}
-				free(err_str);
 			}
 		}
 		/*