--- /dev/null
+// { dg-do compile }
+
+// 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cmath>
+
+namespace gnu
+{
+ using std::acos;
+ using std::asin;
+ using std::atan;
+ using std::atan2;
+ using std::ceil;
+ using std::cos;
+ using std::cosh;
+ using std::exp;
+ using std::fabs;
+ using std::floor;
+ using std::fmod;
+ using std::frexp;
+ using std::ldexp;
+ using std::log;
+ using std::log10;
+ using std::modf;
+ using std::pow;
+ using std::sin;
+ using std::sinh;
+ using std::sqrt;
+ using std::tan;
+ using std::tanh;
+}