Date: Wed, 27 May 2015 14:27:57 +0200
From: Natanael Copa <ncopa@alpinelinux.org>
To: alpine-devel@lists.alpinelinux.org
Subject: [alpine-devel] Change to -march=i586 for x86?
Message-ID: <20150527142757.001268d6@ncopa-desktop.alpinelinux.org>
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Hi,

We currently build our x86 build with -march=i486. There was some old
soekris and alix(?) board that had cpu with 486 instruction set.

There are issues with mesa:

[ 12956.121] (EE) AIGLX error: dlopen
of /usr/lib/xorg/modules/dri/i915_dri.so failed (Error
relocating /usr/lib/xorg/modules/dri/i915_dri.so:
__sync_val_compare_and_swap_8: symbol not found)

This is because 64bit atomic ops are not available for i486.

mono and some other package (sems?) had similar issue. There are
probably more.

I think we want drop i486 support and move to -march=i586 or newer and
I think we want do that sooner than later.

The question is: What 32 bit architecture should we aim for? i586?
i686? Do we need/want support non PAE hardware?

What are the lowest boards people are using nowdays?

-nc


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