Clang does not support __attribute__ on lambdas. Therefore, only set
_GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA if __clang__ is not defined.

Signed-off-by: Matthias Kretz <m.kr...@gsi.de>

libstdc++-v3/ChangeLog:

        PR libstdc++/108030
        * include/experimental/bits/simd_detail.h
        (_GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA): Define as empty for
        __clang__.
---
 libstdc++-v3/include/experimental/bits/simd_detail.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


--
──────────────────────────────────────────────────────────────────────────
 Dr. Matthias Kretz                           https://mattkretz.github.io
 GSI Helmholtz Centre for Heavy Ion Research               https://gsi.de
 stdₓ::simd
──────────────────────────────────────────────────────────────────────────
diff --git a/libstdc++-v3/include/experimental/bits/simd_detail.h b/libstdc++-v3/include/experimental/bits/simd_detail.h
index a0ad10efe0f..30cc1ef0eef 100644
--- a/libstdc++-v3/include/experimental/bits/simd_detail.h
+++ b/libstdc++-v3/include/experimental/bits/simd_detail.h
@@ -254,15 +254,16 @@ namespace experimental
 
 #ifdef __clang__
 #define _GLIBCXX_SIMD_NORMAL_MATH
+#define _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
 #else
 #define _GLIBCXX_SIMD_NORMAL_MATH                                              \
   [[__gnu__::__optimize__("finite-math-only,no-signed-zeros")]]
+#define _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA __attribute__((__always_inline__))
 #endif
 #define _GLIBCXX_SIMD_NEVER_INLINE [[__gnu__::__noinline__]]
 #define _GLIBCXX_SIMD_INTRINSIC                                                \
   [[__gnu__::__always_inline__, __gnu__::__artificial__]] inline
 #define _GLIBCXX_SIMD_ALWAYS_INLINE [[__gnu__::__always_inline__]] inline
-#define _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA __attribute__((__always_inline__))
 #define _GLIBCXX_SIMD_IS_UNLIKELY(__x) __builtin_expect(__x, 0)
 #define _GLIBCXX_SIMD_IS_LIKELY(__x) __builtin_expect(__x, 1)
 

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