libstdc++: Protect against macros

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd.h (__bit_cast): Use
	__gnu__::__vector_size__ instead of gnu::vector_size.

(cherry picked from commit ce2188e4320cbb46d6246bd3f478ba20440c62f3)

diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index 834fe923065bd7bdfe4af8c6cdb2d5224081b306..90523ea57dc7b71a5cb8a38b78b5dd2a93dd8047 100644 (file)
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -1743,18 +1743,18 @@ template <typename _To, typename _From>
       return reinterpret_cast<_To>(__x);
     else if constexpr (__is_vector_type_v<_To> && __from_is_vectorizable)
       {
-       using _FV [[gnu::vector_size(sizeof(_From))]] = _From;
+       using _FV [[__gnu__::__vector_size__(sizeof(_From))]] = _From;
        return reinterpret_cast<_To>(_FV{__x});
       }
     else if constexpr (__to_is_vectorizable && __from_is_vectorizable)
       {
-       using _TV [[gnu::vector_size(sizeof(_To))]] = _To;
-       using _FV [[gnu::vector_size(sizeof(_From))]] = _From;
+       using _TV [[__gnu__::__vector_size__(sizeof(_To))]] = _To;
+       using _FV [[__gnu__::__vector_size__(sizeof(_From))]] = _From;
        return reinterpret_cast<_TV>(_FV{__x})[0];
       }
     else if constexpr (__to_is_vectorizable && __is_vector_type_v<_From>)
       {
-       using _TV [[gnu::vector_size(sizeof(_To))]] = _To;
+       using _TV [[__gnu__::__vector_size__(sizeof(_To))]] = _To;
        return reinterpret_cast<_TV>(__x)[0];
       }
     else