From bd84ea26ea94ba716ca60261e9f2059bf5806310 Mon Sep 17 00:00:00 2001
From: Michal Privoznik <mprivozn@redhat.com>
Date: Mon, 4 Feb 2013 14:56:59 +0100
Subject: [PATCH] Don't redefine _FORTIFY_SOURCE macro

If the _FORTIFY_SOURCE has been already defined, we unconditionally
redefine it, leaving us with warning/error thrown at compilation time.
---
 acinclude.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acinclude.m4 b/acinclude.m4
index 0c308bc..625413f 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -46,7 +46,7 @@ AC_DEFUN([VIRT_VIEWER_COMPILE_WARNINGS],[
 
     AH_VERBATIM([FORTIFY_SOURCE],
                 [/* Enable compile-time and run-time bounds-checking, and some warnings. */
-                 #if defined __OPTIMIZE__ && __OPTIMIZE__
+                 #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
                  # define _FORTIFY_SOURCE 2
                  #endif
                 ])