$OpenBSD$
Bring g_vasprintf into scope
Index: lib/utils/mu-utils.cc
--- lib/utils/mu-utils.cc.orig
+++ lib/utils/mu-utils.cc
@@ -18,7 +18,8 @@
 */
 
 
-#define _XOPEN_SOURCE
+//#define _XOPEN_SOURCE 500
+//#define _POSIX_SOURCE
 #include <time.h>
 
 #define GNU_SOURCE