https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> --- So we have a different behavior in libstdc++-v3/include/experimental/bits/simd_detail.h: #if defined __ARM_NEON && (__ARM_ARCH >= 8 || defined __aarch64__) #define _GLIBCXX_SIMD_HAVE_NEON_A32 1 #else #define _GLIBCXX_SIMD_HAVE_NEON_A32 0 #endif