Patch from Albert J. Wong to make type_traits take advantage of gcc intrinsics in 4.7 and later. No functionality change when using clang.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@211755 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index c628524..981cc9f 100644
--- a/include/__config
+++ b/include/__config
@@ -339,7 +339,11 @@
#endif
#if __has_feature(underlying_type)
-# define _LIBCXX_UNDERLYING_TYPE(T) __underlying_type(T)
+# define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
+#endif
+
+#if __has_feature(is_literal)
+# define _LIBCPP_IS_LITERAL(T) __is_literal(T)
#endif
// Inline namespaces are available in Clang regardless of C++ dialect.
@@ -363,6 +367,11 @@
#define _LIBCPP_NORETURN __attribute__((noreturn))
+#if _GNUC_VER >= 407
+#define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
+#define _LIBCPP_IS_LITERAL(T) __is_literal_type(T)
+#endif
+
#if !__EXCEPTIONS
#define _LIBCPP_NO_EXCEPTIONS
#endif