Re: F42 Change Proposal: Optimized Binaries for the AMD64 / x86_64 Architecture (v2) (self-contained)

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On Mon, Jan 13, 2025 at 6:06 AM Petr Pisar <ppisar@xxxxxxxxxx> wrote:
>
> V Sun, Jan 12, 2025 at 07:08:05PM -0500, Neal Gompa napsal(a):
> > On Sun, Jan 12, 2025 at 4:36 PM Chris Adams <linux@xxxxxxxxxxx> wrote:
> > >
> > > Once upon a time, Neal Gompa <ngompa13@xxxxxxxxx> said:
> > > > For stuff installed into /usr, we
> > > > should just allow packages to be optionally built with the higher
> > > > microarchitecture level in addition to the base one and allow DNF to
> > > > sort and prefer packages accordingly.
> > >
> > > Is this not just resurrecting the old i386/i586/i686 RPM handling?  Is
> > > there a reason not to do it the same way again?
> >
> > Not that I know of. The logic is also already kind of there. The
> > x86_64 arch levels are supported as distinct architectures in RPM with
> > compatibility detection. openSUSE is already using this facility.
> >
> Could you point me to a documentation or an example of the SuSE
> implementation. So far I only found
> <https://en.opensuse.org/openSUSE:X86-64-Architecture-Levels> and
> <https://news.opensuse.org/2023/03/02/tw-gains-optional-optimizations/> which
> do not reveal how RPM and Zypper work with the architecture levels.
>

This was implemented in libzypp 17.31.9 in the following commits:

* https://github.com/openSUSE/libzypp/commit/6b1f606343554bdcd01f290c887b286122c0a2d2
* https://github.com/openSUSE/libzypp/commit/929743bbbba8e5a3bcaf08e8a747c7a3b3fdcbcb

It seems to be relatively straightforward to support.



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