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Date: Sat, 01 Jul 2023 00:16:03 +0200
Subject: x86 baseline now formally raised to SSE2
From: "alice" <alice@ayaya.dev>
To: <~alpine/users@lists.alpinelinux.org>
Message-Id: <CTQBXQ3S98WX.167V56IKQX4EI@sumire>

greetings,

in https://gitlab.alpinelinux.org/alpine/tsc/-/issues/35 it was decided to =
raise
the x86 baseline to sse2, two releases ago.

it was however not done until now. of course, in practice the packaging was
hit or miss- some things implicitly opted-into sse2 anyway via build-system=
.
sometimes it was fixed, sometimes not (best effort).

this baseline change will now mean that going forward, every package is exp=
ected
to utilise sse2 on x86.

if you are using 3.17/3.18 then nothing should change.
  note 3.18: the kernel has PAE which might have issues like
  https://lists.alpinelinux.org/~alpine/users/%3C03307148-0c4f-2aff-a4c9-cf=
9900221db5%40dkcomm.net%3E

if you are using edge, and you have a CPU without sse2, then the hardware w=
ill
most likely not work with alpine linux anymore.

for posterity, the default is (gcc spec):
  --with=3Dpentium-m --with-fpmath=3Dsse

from the docs:
  @item pentium-m
  Intel Pentium M; low-power version of Intel Pentium III CPU
  with MMX, SSE, SSE2 and FXSR instruction set support.  Used by Centrino
  notebooks.

(the first thing on the --with-arch list with sse2).