[vlc-devel] [PATCH 1/1] build: define _FORTIFY_SOURCE only if it is not already defined

[Janne Grunau]

Fixes "_FORTIFY_SOURCE redefined" warnings in every file which includes
config.h if _FORTIFY_SOURCE is predefined by the toolchain.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 09b3a33..8f055c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,8 @@ dnl
 AC_PROG_CC_C99
 AC_USE_SYSTEM_EXTENSIONS
 VLC_PROG_CC_C11
-AC_DEFINE([_FORTIFY_SOURCE], 2, [Define to 2 to get glibc warnings.])
+AC_CHECK_DECL(_FORTIFY_SOURCE, ,
+    AC_DEFINE([_FORTIFY_SOURCE], 2, [Define to 2 to get glibc warnings]),)
 AC_DEFINE([_FILE_OFFSET_BITS], 64, [Define to 64 for large files support.])
 AH_TOP([
 #ifndef _REENTRANT
-- 
2.9.2