From 98f9b88cef36182d7e0f577fe7e9374b146e28ce Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 13 Jun 2015 13:36:47 -0700
Subject: [PATCH] Fixed bug 3011 - pthread/SDL_syssem.c requires _GNU_SOURCE

Ozkan Sezer

pthread/SDL_syssem.c requires _GNU_SOURCE predefined (like SDL_sysmutex.c),
otherwise sem_timedwait() prototype might not be available to it.  Problem
seen with glibc-2.3.4.
---
 src/thread/pthread/SDL_sysmutex.c | 2 +-
 src/thread/pthread/SDL_syssem.c   | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/thread/pthread/SDL_sysmutex.c b/src/thread/pthread/SDL_sysmutex.c
index 07a5ddc81bb44..d7fa982c83daa 100644
--- a/src/thread/pthread/SDL_sysmutex.c
+++ b/src/thread/pthread/SDL_sysmutex.c
@@ -23,8 +23,8 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
-#include <pthread.h>
 #include <errno.h>
+#include <pthread.h>
 
 #include "SDL_thread.h"
 
diff --git a/src/thread/pthread/SDL_syssem.c b/src/thread/pthread/SDL_syssem.c
index 7e0ad0423bc28..a89a262a7551e 100644
--- a/src/thread/pthread/SDL_syssem.c
+++ b/src/thread/pthread/SDL_syssem.c
@@ -20,6 +20,9 @@
 */
 #include "../../SDL_internal.h"
 
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 #include <errno.h>
 #include <pthread.h>
 #include <semaphore.h>