03/07/2025 12:21, Bruce Richardson:
> Some older compilers e.g. gcc 8.5, do not support overriding
> -march=native with another architecture, leading to build warnings such
> as reported in Bugzilla (link below). Add a check for that case, and
> explicitly add the avx512 flags if necessary.
>
> Note: it appears that it is only the "native" flag that isn't
> overridden, which makes the issue hard to reproduce e.g. using
> godbolt.org, or on a modern machine. For example, testing with gcc 8.5
> on a haswell machine, using 'native' vs explicit 'haswell':
>
> gcc -march=native -march=skylake-avx512 -dM -E - < /dev/null | grep AVX512 |
> wc -l
> 0
>
> gcc -march=haswell -march=skylake-avx512 -dM -E - < /dev/null | grep AVX512 |
> wc -l
> 5
>
> Bugzilla ID: 1736
> Fixes: e361ae3f59d3 ("build: reduce use of AVX compiler flags")
>
> Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
Applied, thanks.
