[Spice-devel] [PATCH spice-gtk] Fix _FORTIFY_SOURCE redefine error

[Dunrong Huang]

If the _FORTIFY_SOURCE has been already defined, we shouldn't redefine
it, or it will raise a build error as below:

In file included from spice-audio.c:36:0:
../config.h:12:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
spice-audio.c:1:0: note: this is the location of the previous definition

Suggested-by: Christophe Fergeau <cfergeau at redhat.com>
Signed-off-by: Dunrong Huang <riegamaths at gmail.com>
---
 m4/spice-compile-warnings.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/spice-compile-warnings.m4 b/m4/spice-compile-warnings.m4
index 31fc0fc..533bac6 100644
--- a/m4/spice-compile-warnings.m4
+++ b/m4/spice-compile-warnings.m4
@@ -104,7 +104,7 @@ AC_DEFUN([SPICE_COMPILE_WARNINGS],[
     # Use improved glibc headers
     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
     ])
-- 
1.8.3.2