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authorPablo Neira Ayuso <pablo@netfilter.org>2012-04-16 19:12:58 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2012-08-06 14:48:58 +0200
commita0c885ae5a79457aa592cb70c27a7dee619762a4 (patch)
tree320710d4fecd5ab7c64285706aaa00637c6cb1fe /m4
parent8b6ab7a3a503be66216db7c046646fcd15c28771 (diff)
add new libnetfilter_queue API for libmnl
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'm4')
-rw-r--r--m4/gcc4_visibility.m421
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])
+])