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diff --git a/libstdc++-v3/include/parallel/features.h b/libstdc++-v3/include/parallel/features.h
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+// -*- C++ -*-
+
+// Copyright (C) 2007, 2009 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/>.
+
+/** @file parallel/features.h
+ *  @brief Defines on whether to include algorithm variants.
+ *
+ *  Less variants reduce executable size and compile time.
+ *  This file is a GNU parallel extension to the Standard C++ Library.
+ */
+
+// Written by Johannes Singler.
+
+#ifndef _GLIBCXX_PARALLEL_FEATURES_H
+#define _GLIBCXX_PARALLEL_FEATURES_H 1
+
+#ifndef _GLIBCXX_MERGESORT
+/** @def _GLIBCXX_MERGESORT
+ *  @brief Include parallel multi-way mergesort.
+ *  @see __gnu_parallel::_Settings::sort_algorithm */
+#define _GLIBCXX_MERGESORT 1
+#endif
+
+#ifndef _GLIBCXX_QUICKSORT
+/** @def _GLIBCXX_QUICKSORT
+ *  @brief Include parallel unbalanced quicksort.
+ *  @see __gnu_parallel::_Settings::sort_algorithm */
+#define _GLIBCXX_QUICKSORT 1
+#endif
+
+#ifndef _GLIBCXX_BAL_QUICKSORT
+/** @def _GLIBCXX_BAL_QUICKSORT
+ *  @brief Include parallel dynamically load-balanced quicksort.
+ *  @see __gnu_parallel::_Settings::sort_algorithm */
+#define _GLIBCXX_BAL_QUICKSORT 1
+#endif
+
+#ifndef _GLIBCXX_FIND_GROWING_BLOCKS
+/** @brief Include the growing blocks variant for std::find.
+ *  @see __gnu_parallel::_Settings::find_algorithm */
+#define _GLIBCXX_FIND_GROWING_BLOCKS 1
+#endif
+
+#ifndef _GLIBCXX_FIND_CONSTANT_SIZE_BLOCKS
+/** @brief Include the equal-sized blocks variant for std::find.
+ *  @see __gnu_parallel::_Settings::find_algorithm */
+#define _GLIBCXX_FIND_CONSTANT_SIZE_BLOCKS 1
+#endif
+
+#ifndef _GLIBCXX_FIND_EQUAL_SPLIT
+/** @def _GLIBCXX_FIND_EQUAL_SPLIT
+ *  @brief Include the equal splitting variant for std::find.
+ *  @see __gnu_parallel::_Settings::find_algorithm */
+#define _GLIBCXX_FIND_EQUAL_SPLIT 1
+#endif
+
+
+#ifndef _GLIBCXX_TREE_INITIAL_SPLITTING
+/** @def _GLIBCXX_TREE_INITIAL_SPLITTING
+ *  @brief Include the initial splitting variant for
+ *  _Rb_tree::insert_unique(InputIterator beg, InputIterator end).
+ *  @see __gnu_parallel::_Rb_tree */
+#define _GLIBCXX_TREE_INITIAL_SPLITTING 1
+#endif
+
+#ifndef _GLIBCXX_TREE_DYNAMIC_BALANCING
+/** @def _GLIBCXX_TREE_DYNAMIC_BALANCING
+ *  @brief Include the dynamic balancing variant for
+ *  _Rb_tree::insert_unique(InputIterator beg, InputIterator end).
+ *  @see __gnu_parallel::_Rb_tree */
+#define _GLIBCXX_TREE_DYNAMIC_BALANCING 1
+#endif
+
+#ifndef _GLIBCXX_TREE_FULL_COPY
+/** @def _GLIBCXX_TREE_FULL_COPY
+ *  @brief In order to sort the input sequence of
+ *  _Rb_tree::insert_unique(InputIterator beg, InputIterator end) a
+ *  full copy of the input elements is done.
+ *  @see __gnu_parallel::_Rb_tree */
+#define _GLIBCXX_TREE_FULL_COPY 1
+#endif
+
+
+#endif /* _GLIBCXX_PARALLEL_FEATURES_H */