If the _FORTIFY_SOURCE has been already defined, we unconditionally
redefine it, leaving us with warning/error thrown at compilation time.
---
m4/virt-compile-warnings.m4 | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index cdcbad9..894ab59 100644
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -84,8 +84,13 @@ AC_DEFUN([LIBVIRT_SANDBOX_COMPILE_WARNINGS],[
gl_WARN_ADD([-Wframe-larger-than=4096])
# Use improved glibc headers
- AC_DEFINE([_FORTIFY_SOURCE], [2],
- [enable compile-time and run-time bounds-checking, and some warnings])
+ AH_VERBATIM([FORTIFY_SOURCE],
+ [/* Enable compile-time and run-time bounds-checking, and some warnings,
+ without upsetting newer glibc. */
+ #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
+ # define _FORTIFY_SOURCE 2
+ #endif
+ ])
# Extra special flags
dnl -fstack-protector stuff passes gl_WARN_ADD with gcc
--
1.8.0.2
--
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