$OpenBSD: patch-source_tags_cc,v 1.1 2017/05/01 21:00:15 espie Exp $
Index: source/tags.cc
--- source/tags.cc.orig
+++ source/tags.cc
@@ -55,6 +55,7 @@
 
 #include <stdio.h>
 #include <string.h>            // for memcpy
+#include <stdlib.h>
 
 #ifdef LINUX
 #include <sys/types.h>
