Re: expected baseline changes for forky

Le vendredi 14 août 2026, 10:48:07 heure d’été d’Europe centrale John Paul Adrian Glaubitz a écrit :
> On Thu, 2026-08-13 at 15:09 +0200, Bastien Roucaries wrote:
> > Le jeudi 13 août 2026, 13:00:41 heure d’été d’Europe centrale John Paul Adrian Glaubitz a écrit :
> > > Hi Bastien,
> > > 
> > > On Thu, 2026-08-13 at 12:53 +0200, Bastien Roucaries wrote:
> > > > In order to ease the user/devel experience I want for isa-support to create test for forky baseline
> > 
> > I forget to add my goal, the goal is to create a forky package forky-isa-support and backport it as last PU before release.
> > 
> > Therefore user could do apt install forky-isa-support and it will fail if upgrade is not supported.
> > 
> > Better user experience
> 
> OK, but that still means breaking existing usecases.

Yes but a least upgrade could fail early instead of broken semi install.

> > > > 
> > > > For now I test for armhf:
> > > > 
> > > > armv8-support
> > > >     CPU feature checking - require ARMv8
> > > > 
> > > > neon-support
> > > 
> > > Not sure I understand this. You want to raise armhf to ARMv8? Why would
> > > anyone then install a 32-bit port when they could just use the 64-bit
> > > port in the first place?
> > 
> > Some packages need it, I agree with you about arm7 it is only for completeness.
> > If you want to raise baseline ask for more test
> 
> The decisions to determine the baseline should not be aligned whether some
> packages need it or not but whether the final product will be usable by
> end users.
> 
> Please don't look at the build results on the buildds. We're not building
> a distribution for the sake of building one but for delivering a product
> that people will use.
> 
> > > 
> > > > For armhf/arm64 (will like to know if it exist supported cpu without crc)
> > > > 
> > > > armv8crc-support
> > > >     CPU feature checking - require ARMv8CRC
> > > 
> > > What's the advantage of requiring ARMv8CRC?
> > 
> > Some package need it to me best knownelge for arm64 except one card every cpu has crc.
> 
> That's not an argument. If I have an ARMv8-capable machine, I'm not going
> to install Debian's armhf port. That makes no sense.

Not amrv8CRC is for arm64 also
> 
> > > 
> > > > For amd64/i386 (i will like to only use psABI defintion so 
> > > > 
> > > > sse3-support
> > > >     vérification de caractéristique de CPU – besoin de SSE3
> > > > sse4.1-support
> > > >     CPU feature checking - require SSE4.1
> > > > sse4.2-support
> > > >     SSE4.2
> > > > x86-64-v2-support
> > > >     CPU feature checking - require x86-64-v2
> > > > x86-64-v3-support
> > > >     CPU feature checking - require x86-64-v3
> > > 
> > > Isn't that something that should be done using hwcaps support?
> > 
> > Yes but some upstream are require sse3
Yes and they should be ported to SIMDEverywhere
https://wiki.debian.org/SIMDEverywhere and use hwcaps and bonus point portable to other arch

rouca


> 
> See above, not an argument.
> 
> > > > for ppc/ppc64
> > > > 
> > > > altivec-support
> > > 
> > > POWER8 already has AltiVec.
> > 
> > So I could drop for ppc ?
> 
> Not sure what you mean with "ppc" here. Please be more precise.
> 
> We have:
> 
> - powerpc
> - ppc64
> - ppc64el
> 
> > 
> Adrian
> 
>

-----BEGIN PGP SIGNATURE-----
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=lSrk
-----END PGP SIGNATURE-----