Zsolt Parragi <zsolt.parragi@percona.com> writes:
> It seems this is dependent on the linux distribution. I assumed gcc
> uses the same march on all modern linux distributions, but that
> doesn't seem to be the case.
It may be changing with time, too. Same experiment on Red Hat distros:
gcc 8.5.0 on RHEL8:
$ gcc -Q --help=target | grep march
-march= x86-64
$ gcc -m32 -Q --help=target | grep march
-march= x86-64
gcc 11.5.0 on RHEL9:
$ gcc -Q --help=target | grep march
-march= x86-64-v2
Known valid arguments for -march= option:
$ gcc -m32 -Q --help=target | grep march
-march= x86-64
Known valid arguments for -march= option:
gcc 14.3.1 on Fedora 41:
$ gcc -Q --help=target | grep march
-march= x86-64
Known valid arguments for -march= option:
$ gcc -m32 -Q --help=target | grep march
-march= i686
Known valid arguments for -march= option:
regards, tom lane
