$OpenBSD: patch-src_include_thread_h,v 1.2 2013/05/18 22:00:52 pascal Exp $
--- src/include/thread.h.orig	Sat Apr 13 04:30:27 2013
+++ src/include/thread.h	Fri May  3 21:44:29 2013
@@ -110,7 +110,7 @@ InterlockedExchangeAdd64 (volatile long long *Addend, 
 #endif
 
 #if defined(__GNUC__) && (defined(_GLIBCXX_ATOMIC_BUILTINS) || (__GNUC__ * 100 + __GNUC_MINOR__ >= 401))
-#if !defined(__FreeBSD__) || defined(__x86_64__)
+#if !(defined(__FreeBSD__) || defined(__OpenBSD__)) || defined(__x86_64__)
 #define USE_GCC_ATOMICS
 #endif
 #endif
