[arch-dev-public] ON HOLD - RFC: Use x86_64-v2 architecture

[Allan McRae]

On 3/3/21 10:54 am, Allan McRae via arch-dev-public wrote:
> On 2/3/21 9:51 pm, Allan McRae wrote:
>> Hi all,
>>
>> A new RFC has been opened here:
>> https://gitlab.archlinux.org/archlinux/rfcs/-/merge_requests/2
>>
>> Summary:
>> Make -march=x86_64-v2 the default for our packages.  This assumes the
>> following instruction sets which are essentially available on all but
>> the oldest AMD CPUs:
>>
>> CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3
>>
>> Please visit the above link for discussion.

Lets put discussion on this RFC on hold for a while.  Clearly there is a
reasonable amount of objection to making x86-64-v2 the default.  While
this mostly appears to be objection based on personal circumstances and
not on the basis of whether this change is good for the distro, I will
work within these limits.

A lot of comments have suggested adding x86-64-v2 and -v3 as additional
architectures instead.  I will revamp the the proposal to take that
approach.  Though, to do this automated would require more work it may
be the push we need for a signing enclave to be set up.

Allan