[Bug target/100347] [11/12 Regression] GCC 11 does not recognize skylake; translates "march=native" to "x86_64"

[iains at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100347

--- Comment #11 from Iain Sandoe <iains at gcc dot gnu.org> ---
I also tried on a xeon w machine with darwin19 (macOS 10.15), where it detects
skylake-avx512 (which is a reasonable description, although possibly
cascadelake would be slightly more accurate)