https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69471
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-02-08
CC| |hjl.tools at gmail dot com
Ever confirmed|0 |1
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
-march=native overrides everything, including, -march= after it:
[hjl@gnu-cfl-2 gcc]$ cat /tmp/foo.c
#ifndef __AVX512F__
# error No AVX512F
#endif
[hjl@gnu-cfl-2 gcc]$ ./xgcc -B./ -march=skylake-avx512 -S /tmp/foo.c
[hjl@gnu-cfl-2 gcc]$ ./xgcc -B./ -march=native -march=skylake-avx512 -S
/tmp/foo.c
/tmp/foo.c:2:3: error: #error No AVX512F
2 | # error No AVX512F
| ^~~~~
[hjl@gnu-cfl-2 gcc]$
