Apply this change from gnulib:

2006-06-16  Eric Blake  <ebb9@byu.net>
* unsetenv.c [!defined errno]: Assume errno.h declares errno.

diff --git a/lib/unsetenv.c b/lib/unsetenv.c
index f216440ce81c5fc5e9d46551bf42d00efcb1e52f..b26bd8dc9e03a3401dad726e2ea671ac237471d6 100644 (file)
--- a/lib/unsetenv.c
+++ b/lib/unsetenv.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992,1995-1999,2000-2002,2005 Free Software Foundation, Inc.
+/* Copyright (C) 1992,1995-1999,2000-2002,2005-2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software; you can redistribute it and/or modify
@@ -13,7 +13,7 @@
 
    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
@@ -21,9 +21,6 @@
 
 #include <errno.h>
 #if !_LIBC
-# if !defined errno && !defined HAVE_ERRNO_DECL
-extern int errno;
-# endif
 # define __set_errno(ev) ((errno) = (ev))
 #endif