[gcc r11-11426] libstdc++: Protect against macros

[Matthias Kretz via Gcc-cvs]

https://gcc.gnu.org/g:fdd2a21a53facecc8e2b240673f909dae4034e88

commit r11-11426-gfdd2a21a53facecc8e2b240673f909dae4034e88
Author: Matthias Kretz <m.kr...@gsi.de>
Date:   Fri Jun 2 21:21:36 2023 +0200

    libstdc++: Protect against macros
    
    Signed-off-by: Matthias Kretz <m.kr...@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:
---
 libstdc++-v3/include/experimental/bits/simd.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/include/experimental/bits/simd.h 
b/libstdc++-v3/include/experimental/bits/simd.h
index d5683bfcacb3..248237731268 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -1615,18 +1615,18 @@ 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