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diff --git a/nuttx/include/cxx/cmath b/nuttx/include/cxx/cmath
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+//***************************************************************************
+// include/cxx/cmath
+//
+//   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+//    used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//***************************************************************************
+
+#ifndef __INCLUDE_CXX_CMATH
+#define __INCLUDE_CXX_CMATH
+
+//***************************************************************************
+// Included Files
+//***************************************************************************
+
+#include <math.h>
+
+//***************************************************************************
+// Namespace
+//***************************************************************************
+
+namespace std
+{
+  using ::acos;
+  using ::asin;
+  using ::atan;
+  using ::atan2;
+  using ::ceil;
+  using ::cos;
+  using ::cosh;
+  using ::exp;
+  using ::fabs;
+  using ::floor;
+  using ::fmod;
+  using ::frexp;
+  using ::ldexp;
+  using ::log;
+  using ::log10;
+  using ::modf;
+  using ::pow;
+  using ::sin;
+  using ::sinh;
+  using ::sqrt;
+  using ::tan;
+  using ::tanh;
+}
+
+#endif // __INCLUDE_CXX_CMATH