Index: boost/math/special_functions/math_fwd.hpp
===================================================================
--- boost/math/special_functions/math_fwd.hpp	(revision 84903)
+++ boost/math/special_functions/math_fwd.hpp	(working copy)
@@ -1402,7 +1402,74 @@
 
 
 
+#ifdef BOOST_MATH_TEST_MACRO
 
+namespace boost { namespace math { namespace detail { namespace test {
+
+#ifdef fpclassify
+#undef fpclassify
+#endif
+#define fpclassify(x) (boost::math::detail::test::fpclassify(x))
+
+template <class T> inline int fpclassify BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::fpclassify)(x);
+}
+
+#ifdef isfinite
+#undef isfinite
+#endif
+#define isfinite(x) (boost::math::detail::test::isfinite(x))
+
+template <class T> inline int isfinite BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::isfinite)(x);
+}
+
+#ifdef isinf
+#undef isinf
+#endif
+#define isinf(x) (boost::math::detail::test::isinf(x))
+
+template <class T> inline int isinf BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::isinf)(x);
+}
+
+#ifdef isnan
+#undef isnan
+#endif
+#define isnan(x) (boost::math::detail::test::isnan(x))
+
+template <class T> inline int isnan BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::isnan)(x);
+}
+
+#ifdef isnormal
+#undef isnormal
+#endif
+#define isnormal(x) (boost::math::detail::test::isnormal(x))
+
+template <class T> inline int isnormal BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::isnormal)(x);
+}
+
+#ifdef signbit
+#undef signbit
+#endif
+#define signbit(x) (boost::math::detail::test::signbit(x))
+
+template <class T> inline int signbit BOOST_NO_MACRO_EXPAND(T x)
+{
+    return (std::signbit)(x);
+}
+
+}}}}
+
+#endif // BOOST_MATH_TEST_MACRO
+
 #endif // BOOST_MATH_SPECIAL_MATH_FWD_HPP