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$OpenBSD$
Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -32,6 +32,7 @@ AC_USE_SYSTEM_EXTENSIONS
# Initialize Automake
AM_INIT_AUTOMAKE([foreign dist-bzip2])
+AM_MAINTAINER_MODE
# Initialize libtool
AC_PROG_LIBTOOL
@@ -56,6 +57,13 @@ AC_ARG_ENABLE(futex, AS_HELP_STRING([--enable-futex],
if test "x$FUTEX" = "xauto"; then
AC_CHECK_HEADER([linux/futex.h], [FUTEX=yes])
+fi
+
+if test "x$FUTEX" = "xauto"; then
+ AC_CHECK_HEADER([sys/futex.h], [FUTEX=yes])
+ if test "x$FUTEX" = "xyes"; then
+ AC_DEFINE(HAVE_FUTEX, 1, [Use futex])
+ fi
fi
if test "x$FUTEX" = "xauto"; then
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