$NetBSD: patch-ak,v 1.2 2015/12/29 23:34:43 dholland Exp $

Don't declare own errno.

--- Tk/unix/tkUnixPort.h.orig	2006-01-11 17:12:28.000000000 +0000
+++ Tk/unix/tkUnixPort.h
@@ -120,13 +120,6 @@
 #define MASK_SIZE howmany(FD_SETSIZE, NFDBITS)
 
 /*
- * Not all systems declare the errno variable in errno.h. so this
- * file does it explicitly.
- */
-
-extern int errno;
-
-/*
  * Define "NBBY" (number of bits per byte) if it's not already defined.
  */