$NetBSD: patch-ac,v 1.6 2015/12/29 23:34:46 dholland Exp $

Don't declare own errno.

--- src/io.c.orig	2006-01-09 22:17:25.000000000 +0000
+++ src/io.c
@@ -48,7 +48,6 @@
 
 extern void Flush_Output (Object);
 
-extern int errno;
 extern char *getenv();
 
 Object Curr_Input_Port, Curr_Output_Port;