obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 229 insertions, 0 deletions

diff --git a/libstdc++-v3/include/bits/stl_iterator_base_types.h b/libstdc++-v3/include/bits/stl_iterator_base_types.h
new file mode 100644
index 000000000..9944dc441
--- /dev/null
+++ b/libstdc++-v3/include/bits/stl_iterator_base_types.h
@@ -0,0 +1,229 @@
+// Types used in iterator implementation -*- C++ -*-
+
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+// 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 3, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/*
+ *
+ * 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) 1996-1998
+ * 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 bits/stl_iterator_base_types.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{iterator}
+ *
+ *  This file contains all of the general iterator-related utility types,
+ *  such as iterator_traits and struct iterator.
+ */
+
+#ifndef _STL_ITERATOR_BASE_TYPES_H
+#define _STL_ITERATOR_BASE_TYPES_H 1
+
+#pragma GCC system_header
+
+#include <bits/c++config.h>
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+# include <type_traits>  // For _GLIBCXX_HAS_NESTED_TYPE
+#endif
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  /**
+   *  @defgroup iterators Iterators
+   *  Abstractions for uniform iterating through various underlying types.
+  */
+  //@{ 
+
+  /**
+   *  @defgroup iterator_tags Iterator Tags
+   *  These are empty types, used to distinguish different iterators.  The
+   *  distinction is not made by what they contain, but simply by what they
+   *  are.  Different underlying algorithms can then be used based on the
+   *  different operations supported by different iterator types.
+  */
+  //@{ 
+  ///  Marking input iterators.
+  struct input_iterator_tag { };
+
+  ///  Marking output iterators.
+  struct output_iterator_tag { };
+
+  /// Forward iterators support a superset of input iterator operations.
+  struct forward_iterator_tag : public input_iterator_tag { };
+
+  /// Bidirectional iterators support a superset of forward iterator
+  /// operations.
+  struct bidirectional_iterator_tag : public forward_iterator_tag { };
+
+  /// Random-access iterators support a superset of bidirectional
+  /// iterator operations.
+  struct random_access_iterator_tag : public bidirectional_iterator_tag { };
+  //@}
+
+  /**
+   *  @brief  Common %iterator class.
+   *
+   *  This class does nothing but define nested typedefs.  %Iterator classes
+   *  can inherit from this class to save some work.  The typedefs are then
+   *  used in specializations and overloading.
+   *
+   *  In particular, there are no default implementations of requirements
+   *  such as @c operator++ and the like.  (How could there be?)
+  */
+  template<typename _Category, typename _Tp, typename _Distance = ptrdiff_t,
+           typename _Pointer = _Tp*, typename _Reference = _Tp&>
+    struct iterator
+    {
+      /// One of the @link iterator_tags tag types@endlink.
+      typedef _Category  iterator_category;
+      /// The type "pointed to" by the iterator.
+      typedef _Tp        value_type;
+      /// Distance between iterators is represented as this type.
+      typedef _Distance  difference_type;
+      /// This type represents a pointer-to-value_type.
+      typedef _Pointer   pointer;
+      /// This type represents a reference-to-value_type.
+      typedef _Reference reference;
+    };
+
+  /**
+   *  @brief  Traits class for iterators.
+   *
+   *  This class does nothing but define nested typedefs.  The general
+   *  version simply @a forwards the nested typedefs from the Iterator
+   *  argument.  Specialized versions for pointers and pointers-to-const
+   *  provide tighter, more correct semantics.
+  */
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+
+_GLIBCXX_HAS_NESTED_TYPE(iterator_category)
+
+  template<typename _Iterator,
+	   bool = __has_iterator_category<_Iterator>::value>
+    struct __iterator_traits { };
+
+  template<typename _Iterator>
+    struct __iterator_traits<_Iterator, true>
+    {
+      typedef typename _Iterator::iterator_category iterator_category;
+      typedef typename _Iterator::value_type        value_type;
+      typedef typename _Iterator::difference_type   difference_type;
+      typedef typename _Iterator::pointer           pointer;
+      typedef typename _Iterator::reference         reference;
+    };
+
+  template<typename _Iterator>
+    struct iterator_traits
+    : public __iterator_traits<_Iterator> { };
+#else
+  template<typename _Iterator>
+    struct iterator_traits
+    {
+      typedef typename _Iterator::iterator_category iterator_category;
+      typedef typename _Iterator::value_type        value_type;
+      typedef typename _Iterator::difference_type   difference_type;
+      typedef typename _Iterator::pointer           pointer;
+      typedef typename _Iterator::reference         reference;
+    };
+#endif
+
+  /// Partial specialization for pointer types.
+  template<typename _Tp>
+    struct iterator_traits<_Tp*>
+    {
+      typedef random_access_iterator_tag iterator_category;
+      typedef _Tp                         value_type;
+      typedef ptrdiff_t                   difference_type;
+      typedef _Tp*                        pointer;
+      typedef _Tp&                        reference;
+    };
+
+  /// Partial specialization for const pointer types.
+  template<typename _Tp>
+    struct iterator_traits<const _Tp*>
+    {
+      typedef random_access_iterator_tag iterator_category;
+      typedef _Tp                         value_type;
+      typedef ptrdiff_t                   difference_type;
+      typedef const _Tp*                  pointer;
+      typedef const _Tp&                  reference;
+    };
+
+  /**
+   *  This function is not a part of the C++ standard but is syntactic
+   *  sugar for internal library use only.
+  */
+  template<typename _Iter>
+    inline typename iterator_traits<_Iter>::iterator_category
+    __iterator_category(const _Iter&)
+    { return typename iterator_traits<_Iter>::iterator_category(); }
+
+  //@}
+
+  // If _Iterator has a base returns it otherwise _Iterator is returned
+  // untouched
+  template<typename _Iterator, bool _HasBase>
+    struct _Iter_base
+    {
+      typedef _Iterator iterator_type;
+      static iterator_type _S_base(_Iterator __it)
+      { return __it; }
+    };
+
+  template<typename _Iterator>
+    struct _Iter_base<_Iterator, true>
+    {
+      typedef typename _Iterator::iterator_type iterator_type;
+      static iterator_type _S_base(_Iterator __it)
+      { return __it.base(); }
+    };
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif /* _STL_ITERATOR_BASE_TYPES_H */
+