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Re: Architecture baseline for Forky



On Mon, 2025-10-27 at 09:55 +0100, Gerardo Ballabio wrote:
> If I understand correctly, the rationale for not supporting power8 is this:
> 
> Bastian Blank wrote:
> > ## ppc64el
> > ```
> > % /usr/lib64/ld64.so.2 --help | sed -n '/^Subdirectories of glibc-hwcaps/,$p'
> > Subdirectories of glibc-hwcaps directories, in priority order:
> >   power10
> >   power9 (supported, searched)
> > ```
> 
> I read that as meaning that power9 is supported by the current
> toolchain, while power8 is not. Please correct me if I am wrong.

POWER8 is still supported. The snippet above just documents what additional targets
are supported through the hwcaps mechanism in glibc [1] which are POWER9 and POWER10.

> So this isn't about "dropping" support for power8, it's about
> "restoring" it. As usual, Debian is a doocracy: we can do that if
> somebody commits to do that.

Nope, it's about dropping. POWER8 is still supported by the toolchain, kernel
and glibc. In fact, even much older POWER systems down to POWER5 and PowerPC 970
and even 32-bit PowerPC are still supported.

PS: I still think it's a bad idea to use the alias debian-ports@.

Adrian

> [1] https://sourceware.org/glibc/manual/latest/html_node/Hardware-Capability-Tunables.html

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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