Hi,

as a heads-up: Debian is raising the baseline ISA of its s390x port to
z196 in order to support more of the contemporary languages, none of
which unfortunately care about ISAs lower than that. This means that
older machines cannot upgrade to current Debian testing (stretch) and
expect that things keep running. They might experience more and more
breakage in the process.

Kind regards
Philipp Kern

-------- Original Message --------
Subject: s390x ISA raised to z196
Date: 2018-02-18 19:17
From: Aurelien Jarno <aure...@debian.org>
To: debian-s...@lists.debian.org

Hi all,

Following the RFC on this mailing list[1], the baseline ISA of the s390x
port has been raised z196. This allows Debian to support packages like
rust, go or nodejs, which do not support older ISAs. For now only this
packages are affected, but in the future the default ISA in GCC will
also be raised, so more and more packages will use the corresponding
instructions.

As a consequence people should not upgrade to buster or sid if they have
and older CPU. The change does not affect Stretch, which will still be
supported for a bit more than 2 years.

Regards,
Aurelien

[1] https://lists.debian.org/debian-s390/2018/01/msg00015.html

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