--- OpenImageIO-oiio-e9fa4c7/src/include/thread.h~	2012-07-09 08:28:46.000000000 +0200
+++ OpenImageIO-oiio-e9fa4c7/src/include/thread.h	2012-07-12 00:36:54.502654305 +0200
@@ -102,11 +102,7 @@
 #  include <libkern/OSAtomic.h>
 #endif
 
-#if defined(__GNUC__) && (defined(_GLIBCXX_ATOMIC_BUILTINS) || (__GNUC__ * 100 + __GNUC_MINOR__ >= 401))
-#if !defined(__FreeBSD__) || defined(__x86_64__)
-#define USE_GCC_ATOMICS
-#endif
-#endif
+#undef USE_GCC_ATOMICS
 
 OIIO_NAMESPACE_ENTER
 {