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diff --git a/src/boost/libs/config/test/boost_no_constexpr.ipp b/src/boost/libs/config/test/boost_no_constexpr.ipp
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+//  (C) Copyright Beman Dawes 2008
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX11_CONSTEXPR 
+//  TITLE:         C++0x constexpr unavailable
+//  DESCRIPTION:   The compiler does not support C++0x constexpr
+
+namespace boost_no_cxx11_constexpr {
+
+void quiet_warning(int){}
+
+constexpr int square(int x) { return x * x; }  // from N2235
+
+// from 5.19:
+constexpr const int* addr(const int& ir) { return &ir; }
+static const int x = 5;
+constexpr const int* xp = addr(x);
+
+struct A 
+{
+   constexpr A(int i) : val(i) { }
+   constexpr operator int()const { return val; }
+   constexpr operator long()const { return 43; }
+private:
+   int val;
+};
+
+template<int> struct X { };
+
+constexpr const A a = 42;
+
+X<a> xx; // OK: unique conversion to int
+
+// virtual function
+struct B
+{
+   virtual void vf() {}
+};
+struct C : B
+{
+   constexpr C() {}
+};
+
+// aggregate initialization
+struct D
+{
+   int val[2];
+   constexpr D() : val() {}
+};
+
+// virtual base
+struct E
+{
+};
+struct F : virtual E
+{
+};
+constexpr F& f(F& out) { return out; }
+
+namespace whatever{};
+
+constexpr int factorial(int i)
+{
+   typedef int value_type;
+   using namespace whatever;
+   return i <= 1 ? 1 : i * factorial(value_type(i-1));
+}
+
+int test()
+{
+  constexpr int i = square(5) + factorial(10);
+  quiet_warning(i);
+
+  switch (i)
+  {
+  case a:
+    break;
+  }
+
+  return 0;
+}
+
+}