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| author | Alan Coopersmith <alan.coopersmith@oracle.com> | 2022-10-27 18:42:47 -0700 |
|---|---|---|
| committer | Alan Coopersmith <alan.coopersmith@oracle.com> | 2022-10-27 18:45:32 -0700 |
| commit | 246cbc402aabe5e971c43d1a21b66ab4c602f1cf (patch) | |
| tree | adc85cd9fb08f76e9376919a4065ae69f7e77f45 | |
| parent | 81da58f39d274ab7f822fb22e56b5b2027597a51 (diff) | |
Only link with libbsd if needed for arc4random_buf() or getentropy()
Avoid unnecessary library dependency when using a libc with these
functions included
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
| -rw-r--r-- | configure.ac | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index 1c9bcf8..328f95f 100644 --- a/configure.ac +++ b/configure.ac @@ -31,10 +31,17 @@ XORG_CHECK_SGML_DOCTOOLS(1.8) # Obtain compiler/linker options for dependencies PKG_CHECK_MODULES(ICE, [xproto >= 7.0.25 xtrans]) -PKG_CHECK_MODULES([LIBBSD], [libbsd-overlay], [ + +# Checks for non-standard functions and fallback to libbsd if we can +# We only check for arc4random_buf, because if we have that, we don't +# need/use getentropy. +AC_LINK_IFELSE([AC_LANG_CALL([], [arc4random_buf])], + [TRY_LIBBSD="no"], [TRY_LIBBSD="yes"]) +AS_IF([test "x$TRY_LIBBSD" = "xyes"], + [PKG_CHECK_MODULES([LIBBSD], [libbsd-overlay], [ CFLAGS="$CFLAGS $LIBBSD_CFLAGS" LIBS="$LIBS $LIBBSD_LIBS" -], [:]) +], [:])]) # Checks for library functions. AC_CHECK_FUNCS([asprintf arc4random_buf getentropy]) |