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

Don't declare own errno.

--- Tcl/tclUnixPort.h.orig	2006-01-11 17:08:11.000000000 +0000
+++ Tcl/tclUnixPort.h
@@ -176,14 +176,6 @@
 #define	TCL_PLATFORM_TRANSLATION	TCL_TRANSLATE_LF
 
 /*
- * Not all systems declare the errno variable in errno.h. so this
- * file does it explicitly.  The list of system error messages also
- * isn't generally declared in a header file anywhere.
- */
-
-extern int errno;
-
-/*
  * The type of the status returned by wait varies from UNIX system
  * to UNIX system.  The macro below defines it:
  */