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diff --git a/contrib/libstdc++/src/cmath.cc b/contrib/libstdc++/src/cmath.cc
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+++ b/contrib/libstdc++/src/cmath.cc
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+// Explicit instantiation file for -*- C++ -*- math library.
+
+// Copyright (C) 2001 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.
+
+
+// These are explicit instantiations of the behind-the-scenes internal
+// helper functions used in the math routines of libstdc++.
+
+
+#include <cmath>
+
+namespace std
+{
+    // This function is only declared/used in the cheaders=c_std case.
+    template float
+      __cmath_power<float>(float, unsigned int);
+    template double
+      __cmath_power<double>(double, unsigned int);
+    template long double
+      __cmath_power<long double>(long double, unsigned int);
+  
+} // namespace std