$OpenBSD$
From upstream 9a14cbb225b3859e208bfa9a0988ffc7f2e7f633.
--- Source/Core/Common/CommonFuncs.h.orig	Fri Jun 24 02:09:07 2016
+++ Source/Core/Common/CommonFuncs.h	Mon Jul 18 00:09:15 2016
@@ -101,7 +101,7 @@ namespace Common
 inline u8 swap8(u8 _data) {return _data;}
 inline u32 swap24(const u8* _data) {return (_data[0] << 16) | (_data[1] << 8) | _data[2];}
 
-#ifdef ANDROID
+#if defined(ANDROID) || defined(__OpenBSD__)
 #undef swap16
 #undef swap32
 #undef swap64