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diff --git a/contrib/libstdc++/include/ext/rb_tree b/contrib/libstdc++/include/ext/rb_tree
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+++ b/contrib/libstdc++/include/ext/rb_tree
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+// rb_tree extension -*- C++ -*-
+
+// Copyright (C) 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.
+
+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Hewlett-Packard Company makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ *
+ * Copyright (c) 1996
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ */
+
+/** @file ext/rb_tree
+ *  This file is a GNU extension to the Standard C++ Library (possibly
+ *  containing extensions from the HP/SGI STL subset).  You should only
+ *  include this header if you are using GCC 3 or later.
+ */
+
+#ifndef _EXT_RB_TREE
+#define _EXT_RB_TREE
+
+#pragma GCC system_header
+#include <bits/stl_tree.h>
+
+namespace __gnu_cxx
+{
+using std::_Rb_tree;
+using std::allocator;
+
+// Class rb_tree is not part of the C++ standard.  It is provided for
+// compatibility with the HP STL.
+
+template <class _Key, class _Value, class _KeyOfValue, class _Compare,
+          class _Alloc = allocator<_Value> >
+struct rb_tree : public _Rb_tree<_Key, _Value, _KeyOfValue, _Compare, _Alloc>
+{
+  typedef _Rb_tree<_Key, _Value, _KeyOfValue, _Compare, _Alloc> _Base;
+  typedef typename _Base::allocator_type allocator_type;
+
+  rb_tree(const _Compare& __comp = _Compare(),
+          const allocator_type& __a = allocator_type())
+    : _Base(__comp, __a) {}
+  
+  ~rb_tree() {}
+};
+
+} // namespace __gnu_cxx
+
+#endif /* _EXT_RB_TREE */