$NetBSD$

--- exec.c.orig	2006-01-03 15:46:21.000000000 +0000
+++ exec.c
@@ -35,7 +35,6 @@
 #include <vfork.h>
 #endif
 
-extern int errno;
 extern char **environ;
 extern char *shell;
 extern char *commands[];
