diff options
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 0f3a4426..740d9ecc 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -38,6 +38,29 @@ 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 |