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diff --git a/libstdc++-v3/src/math_stubs_long_double.cc b/libstdc++-v3/src/math_stubs_long_double.cc
new file mode 100644
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+++ b/libstdc++-v3/src/math_stubs_long_double.cc
@@ -0,0 +1,224 @@
+// Stub definitions for long double math.
+
+// Copyright (C) 2001, 2002, 2003, 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/>.
+
+#include <cmath>
+
+// For targets which do not have support for long double versions,
+// we use the following crude approximations. We keep saying that we'll do
+// better later, but never do.
+
+extern "C" 
+{
+#ifndef _GLIBCXX_HAVE_FABSL
+  long double
+  fabsl(long double x)
+  {
+    return fabs((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_ACOSL
+  long double
+  acosl(long double x)
+  {
+    return acos((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_ASINL
+  long double
+  asinl(long double x)
+  {
+    return asin((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_ATANL
+  long double
+  atanl(long double x)
+  {
+    return atan ((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_ATAN2L
+  long double
+  atan2l(long double x, long double y)
+  {
+    return atan2((double) x, (double) y);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_CEILL
+  long double
+  ceill(long double x)
+  {
+    return ceil((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_COSL
+  long double
+  cosl(long double x)
+  {
+    return cos((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_COSHL
+  long double
+  coshl(long double x)
+  {
+    return cosh((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_EXPL
+  long double
+  expl(long double x)
+  {
+    return exp((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_FLOORL
+  long double
+  floorl(long double x)
+  {
+    return floor((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_FMODL
+  long double
+  fmodl(long double x, long double y)
+  {
+    return fmod((double) x, (double) y);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_FREXPL
+  long double
+  frexpl(long double x, int *exp)
+  {
+    return frexp((double) x, exp);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_SQRTL
+  long double
+  sqrtl(long double x)
+  {
+    return  sqrt((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_HYPOTL
+  long double
+  hypotl(long double x, long double y)
+  {
+    long double s = fabsl(x) + fabsl(y);
+    if (s == 0.0L)
+      return s;
+    x /= s; y /= s;
+    return s * sqrtl(x * x + y * y);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_LDEXPL
+  long double
+  ldexpl(long double x, int exp)
+  {
+    return ldexp((double) x, exp);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_LOGL
+  long double
+  logl(long double x)
+  {
+    return log((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_LOG10L
+  long double
+  log10l(long double x)
+  {
+    return log10((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_MODFL
+  long double
+  modfl(long double x, long double *iptr)
+  {
+    double result, temp;
+
+    result = modf((double) x, &temp);
+    *iptr = temp;
+    return result;
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_POWL
+  long double
+  powl(long double x, long double y)
+  {
+    return pow((double) x, (double) y);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_SINL
+  long double
+  sinl(long double x)
+  {
+    return sin((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_SINHL
+  long double
+  sinhl(long double x)
+  {
+    return sinh((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_TANL
+  long double
+  tanl(long double x)
+  {
+    return tan((double) x);
+  }
+#endif
+
+#ifndef _GLIBCXX_HAVE_TANHL
+  long double
+  tanhl(long double x)
+  {
+    return tanh((double) x);
+  }
+#endif
+} // extern "C"