$OpenBSD: patch-error_c,v 1.1 2016/09/10 13:03:41 ajacoutot Exp $
--- error.c.orig	Sat Sep 10 11:15:10 2016
+++ error.c	Sat Sep 10 11:15:38 2016
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h> /* exit */
 
 #include "constant.h"
   
