https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116484
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #6) > (In reply to Andrew Pinski from comment #5) > > (In reply to J Lee from comment #4) > > > Is this error also related to the same 'const' issue? > > > > No that is unrelated to this attribute issue. > > Well the original error message is. The rest are due to the first error > message. Except it does have some other error messages: /opt/compiler-explorer/libs/xsimd/trunk/include/xsimd/types/xsimd_rvv_register.hpp:121:213: error: explicit specialization in non-namespace scope 'struct xsimd::types::detail::rvv_type_info<signed char, 1024>' Which is PR 85282. So this code won't be supported until that is implemented which seems not any time soon it looks like.
