From 75702ffebc742eae892321fe70a944ccb90a5d4f Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Thu, 28 May 2015 14:34:38 -0400
Subject: [PATCH] Make sure we have the vsscanf() prototype (thanks, Ozkan!).

issue seen with glibc-2.8.

Fixes Bugzilla #2721.
---
 src/stdlib/SDL_string.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/stdlib/SDL_string.c b/src/stdlib/SDL_string.c
index 5c343bbc5..68d88ece0 100644
--- a/src/stdlib/SDL_string.c
+++ b/src/stdlib/SDL_string.c
@@ -23,6 +23,10 @@
 #define SDL_DISABLE_ANALYZE_MACROS 1
 #endif
 
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
 #include "../SDL_internal.h"
 
 /* This file contains portable string manipulation functions for SDL */