$NetBSD: patch-ap,v 1.5 2022/01/24 22:22:11 buhrow Exp $

--- src/osdep/unix/unix.c.orig	2011-07-22 17:20:10.000000000 -0700
+++ src/osdep/unix/unix.c	2022-01-18 22:13:13.433534293 -0800
@@ -40,7 +40,6 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <errno.h>
-extern int errno;		/* just in case */
 #include <signal.h>
 #include "mail.h"
 #include "osdep.h"