From 3acf1764c3136fcdf51d3f36ab8dc096639a3f88 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Fri, 29 Mar 2013 21:16:30 -0400
Subject: [PATCH] Don't use __builtin_clz() on gcc2. (thanks, Axel!)

 Fixes Bugzilla #1771.
---
 include/SDL_bits.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/SDL_bits.h b/include/SDL_bits.h
index 4b35a77cf..d678b7822 100644
--- a/include/SDL_bits.h
+++ b/include/SDL_bits.h
@@ -52,7 +52,7 @@ extern "C" {
 SDL_FORCE_INLINE Sint8
 SDL_MostSignificantBitIndex32(Uint32 x)
 {
-#if defined(__GNUC__)
+#if defined(__GNUC__) && __GNUC__ >= 4
     /* Count Leading Zeroes builtin in GCC.
      * http://gcc.gnu.org/onlinedocs/gcc-4.3.4/gcc/Other-Builtins.html
      */