diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 13:08:37 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-09 13:08:37 +0000 |
| commit | 971e619d8602fa52b1bfcb3ea65b7ab96be85318 (patch) | |
| tree | 26feb2498c72b796e07b86349d17f544046de279 /m4/gcc4_visibility.m4 | |
| parent | Initial commit. (diff) | |
| download | nftables-upstream/1.0.9.tar.xz nftables-upstream/1.0.9.zip | |
Adding upstream version 1.0.9.upstream/1.0.9upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/gcc4_visibility.m4')
| -rw-r--r-- | m4/gcc4_visibility.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/gcc4_visibility.m4 b/m4/gcc4_visibility.m4 new file mode 100644 index 0000000..214d3f3 --- /dev/null +++ b/m4/gcc4_visibility.m4 @@ -0,0 +1,21 @@ + +# GCC 4.x -fvisibility=hidden + +AC_DEFUN([CHECK_GCC_FVISIBILITY], [ + AC_LANG_PUSH([C]) + saved_CFLAGS="$CFLAGS" + CFLAGS="$saved_CFLAGS -fvisibility=hidden" + AC_CACHE_CHECK([whether compiler accepts -fvisibility=hidden], + [ac_cv_fvisibility_hidden], AC_COMPILE_IFELSE( + [AC_LANG_SOURCE()], + [ac_cv_fvisibility_hidden=yes], + [ac_cv_fvisibility_hidden=no] + )) + if test "$ac_cv_fvisibility_hidden" = "yes"; then + AC_DEFINE([HAVE_VISIBILITY_HIDDEN], [1], + [True if compiler supports -fvisibility=hidden]) + AC_SUBST([GCC_FVISIBILITY_HIDDEN], [-fvisibility=hidden]) + fi + CFLAGS="$saved_CFLAGS" + AC_LANG_POP([C]) +]) |