How to set x86 ISA needed property?
Florian Weimer
fweimer@redhat.com
Wed Jan 27 16:14:40 GMT 2021
* Manuel Lauss:
>
>> This is expected to happen only if you use something like
>> -march=x86-64-v3 to build glibc, and only with recent toolchain
>> version. I'm surprised you are hitting this with GCC 10, which does not
>> implement -march=x86-64-v3.
>
> I'm surprised as well, though not all libs/executables have the property set,
> most are missing it. Gentoo's patches to gcc don't add the property code
> either, i'll check binutils next.
It may be a binutils issue. It looks like it chooses x86-64-v3 as the
minimal level that includes ABM (under a different name). That doesn't
look correct. Please check if this is a Gentoo patch, or an upstream
issue.
Thanks,
Florian
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