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| author | Allan McRae <allan@archlinux.org> | 2010-09-27 16:04:10 +1000 |
|---|---|---|
| committer | Allan McRae <allan@archlinux.org> | 2010-09-27 16:06:52 +1000 |
| commit | 900605912b32d08ece7a3e80e4c6b258485676b7 (patch) | |
| tree | 6b73de46b1b37398409200d2da4b0902fe0220a1 /acinclude.m4 | |
| parent | 28c662e7a422314475cca61663695dd31fd86546 (diff) | |
Add FORTIFY_SOURCE support
Adds a check for the minimum mainline GCC version for FORTIFY_SOURCE
support and enables -D_FORTIFY_SOURCE=2 by default when building with
--enable-debug.
Signed-off-by: Allan McRae <allan@archlinux.org>
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 1524a3dd..80b0ba0a 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -4910,6 +4910,29 @@ AC_DEFUN([GCC_STACK_PROTECT_CC],[ fi ]) +dnl GCC_FORTIFY_SOURCE_CC +dnl checks -D_FORTIFY_SOURCE with the C compiler, if it exists then updates +dnl CFLAGS +AC_DEFUN([GCC_FORTIFY_SOURCE_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_MSG_CHECKING(for FORTIFY_SOURCE support) + AC_TRY_COMPILE([#include <features.h>], [ + int main() { + #if !(__GNUC_PREREQ (4, 1) ) + #error No FORTIFY_SOURCE support + #endif + return 0; + } + ], [ + AC_MSG_RESULT(yes) + CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2" + ], [ + AC_MSG_RESULT(no) + ]) + fi +]) + dnl GCC_VISIBILITY_CC dnl checks -fvisibility=internal with the C compiler, if it exists then dnl defines ENABLE_VISIBILITY_CC in both configure script and Makefiles |