Hi,

On Sun, 2025-10-26 at 13:21 +0100, Bastian Blank wrote:
> Only three architectures set an explicit baseline in gcc-12 (Bookworm) and
> gcc-15 (Forky):
> * armhf: armv7-a+fp
> * i386: i686
> * s390: z196
> 
> All other architectures use the default values.
> 
> # Proposal for architecture baseline
> 
> ## amd64 (and i386)
> 
> * x86-64-v2: Supported since around 2008[^x86]. Used in RedHat 9[^redhat9x86].
> * x86-64-v3: Supported since around 2013-2015[^x86]. Used in RedHat
>   10[^redhat10].
> 
> I propose to use the x86-64-v2 baseline in Forky.  It gives us more then the 
> 15
> years and everyone else already switched to it or even a newer variant.
> Factoring in a possible LTS for Trixie, this means that x86-64-v1 will stop
> being supported by Debian in 2030.

I'm very sorry to bring up this old thread again, but there is now a very
good argument for keeping the baseline of the amd64 port at x86_64-v1, namely
CERN.

They just started migrating their laboratory PCs away from RHEL to Debian
because of the baseline switch in RHEL 9 and 10. They cannot just simply
replace the hardware without making larger investments.

See: 
https://www.ictjournal.ch/articles/2026-09-04/pourquoi-le-cern-choisit-debian-plutot-quun-renouvellement-materiel-a-54

Adrian

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