$OpenBSD: patch-libavutil_common_h,v 1.1 2010/05/26 21:38:52 jakemsr Exp $
--- libavutil/common.h.orig	Wed May 19 09:31:50 2010
+++ libavutil/common.h	Wed May 19 09:32:50 2010
@@ -36,6 +36,10 @@
 #include <string.h>
 #include "attributes.h"
 
+#ifndef UINT64_C
+#define UINT64_C(_c)	__CONCAT(_c, ULL)
+#endif
+
 //rounded division & shift
 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
 /* assume b>0 */
