From cb5edf2ba0285a7d53e2a08badd55ee84c58e9f4 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 30 Dec 2009 19:48:23 +0000
Subject: [PATCH] We're using GNU recursive mutexes

---
 src/thread/pthread/SDL_sysmutex.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/thread/pthread/SDL_sysmutex.c b/src/thread/pthread/SDL_sysmutex.c
index 4284fa9bf..cc2d75632 100644
--- a/src/thread/pthread/SDL_sysmutex.c
+++ b/src/thread/pthread/SDL_sysmutex.c
@@ -21,6 +21,7 @@
 */
 #include "SDL_config.h"
 
+#define _GNU_SOURCE
 #include <pthread.h>
 
 #include "SDL_thread.h"