$OpenBSD: patch-common_mapi_ptr_mapi_memory_ptr_h,v 1.1 2010/06/30 02:46:48 ajacoutot Exp $
--- common/mapi_ptr/mapi_memory_ptr.h.orig	Mon Jun 28 23:34:25 2010
+++ common/mapi_ptr/mapi_memory_ptr.h	Mon Jun 28 23:35:09 2010
@@ -52,6 +52,11 @@
 
 #include <utility>
 
+// _U is defined in ctype.h
+#ifdef __OpenBSD__
+#undef _U
+#endif
+
 template<typename _T>
 class mapi_memory_proxy
 {
