Configure to get along with 2.9 clang

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@136526 91177308-0d34-0410-b5e6-96231b3b80d8

include/__config

@@ -146,6 +146,9 @@ typedef __char32_t char32_t;
 
 #if !(__has_feature(cxx_auto_type))
 #define _LIBCPP_HAS_NO_AUTO_TYPE
+#endif
+
+#if __clang_major__ < 3
 #define _LIBCPP_HAS_NO_ADVANCED_SFINAE
 #endif
 

include/memory

@@ -1294,7 +1294,7 @@ struct __has_allocate_hint
 
 #endif  // _LIBCPP_HAS_NO_ADVANCED_SFINAE
 
-#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE
+#if !defined(_LIBCPP_HAS_NO_ADVANCED_SFINAE) && !defined(_LIBCPP_HAS_NO_VARIADICS)
 
 template <class _Alloc, class _Tp, class ..._Args>
 decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Tp*>(),

src/exception.cpp

@@ -56,6 +56,7 @@ std::get_terminate() _NOEXCEPT
     return __sync_fetch_and_add(&__terminate_handler, (std::terminate_handler)0);
 }
 
+_ATTRIBUTE(noreturn)
 void
 std::terminate() _NOEXCEPT
 {