[Rpm-maint] [rpm-software-management/rpm] RFC: Add x86-64 architecture levels (v2-v4) as architectures (PR #2315)

[Panu Matilainen]

Ack.

In the meanwhile I managed to dig up some additional background on this, eg
https://sourceware.org/pipermail/libc-alpha/2020-July/116135.html, https://lwn.net/Articles/844831/ and https://antlarr.io/2021/03/hackweek-20-glibc-hwcaps-in-opensuse/ (which even routes back here :laughing: ).

Indeed these progressive levels (no matter how artificial it may be) is the first glimpse of sanity in the arch space that I've seen in a while. This is something that can reasonably be packaged, and handled by package managers operating on various levels as well.

So. Ack for the concept at least, I'll not let this get stuck the way the znver stuff did, because there's hope here. Thanks for the initiative, and the education. I hadn't followed the hwcap side at all really.

I'd still try to see if this *really* isn't exported by glibc somehow, eg couldn't we take advantage of the glibc-hwcaps feature somehow (and if that leaves other libc's stuck with one level of x86_64, I'm not going to cry a river). 

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