1 files changed, 18 insertions, 1 deletions
diff --git a/libstdc++-v3/include/c_std/bits/std_cmath.h b/libstdc++-v3/include/c_std/bits/std_cmath.h
index 9ec828493e6..d37f900c139 100644
--- a/libstdc++-v3/include/c_std/bits/std_cmath.h
+++ b/libstdc++-v3/include/c_std/bits/std_cmath.h
@@ -722,13 +722,30 @@ namespace c99
 
   template<typename _Tp>
     int 
-    islessgreater(_Tp __f) { return __capture_islessgreater(__f); }
+    islessgreater(_Tp __f1, _Tp __f2) 
+    { return __capture_islessgreater(__f1, __f2); }
 
   template<typename _Tp>
     int 
     isunordered(_Tp __f1, _Tp __f2) 
     { return __capture_isunordered(__f1, __f2); }
 }
+
+namespace std
+{
+  using c99::fpclassify;
+  using c99::isfinite;
+  using c99::isinf;
+  using c99::isnan;
+  using c99::isnormal;
+  using c99::signbit;
+  using c99::isgreater;
+  using c99::isgreaterequal;
+  using c99::isless;
+  using c99::islessequal;
+  using c99::islessgreater;
+  using c99::isunordered;
+}
 #endif
   
 #ifdef _GLIBCPP_NO_TEMPLATE_EXPORT