--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mingw-5.1.4/win32/include/c++/3.4.5/cerrno	Fri Apr 03 17:16:45 2009 +0100
@@ -0,0 +1,55 @@
+// The -*- C++ -*- forwarding header.
+
+// Copyright (C) 1997, 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+//
+// ISO C++ 14882: 19.3  Error numbers
+//
+
+/** @file cerrno
+ *  This is a Standard C++ Library file.  You should @c #include this file
+ *  in your programs, rather than any of the "*.h" implementation files.
+ *
+ *  This is the C++ version of the Standard C Library header @c errno.h,
+ *  and its contents are (mostly) the same as that header, but are all
+ *  contained in the namespace @c std.
+ */
+
+#ifndef _GLIBCXX_CERRNO
+#define _GLIBCXX_CERRNO 1
+
+#pragma GCC system_header
+
+#include <errno.h>
+
+// Adhere to section 17.4.1.2 clause 5 of ISO 14882:1998
+#ifndef errno
+#define errno errno
+#endif
+
+#endif