GNU bug report logs - #55848
AArch64 Honeycomb builders are inactive

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Message #37 received at 55848 <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Maxime Devos <maximedevos <at> telenet.be>
Cc: Mathieu Othacehe <othacehe <at> gnu.org>, 55848 <at> debbugs.gnu.org,
 Tom Fitzhenry <tom <at> tom-fitzhenry.me.uk>
Subject: Re: bug#55848: [cuirass] workers stalled
Date: Tue, 21 Jun 2022 01:32:33 -0400

Hi Maxime,

Maxime Devos <maximedevos <at> telenet.be> writes:

> Maxim Cournoyer schreef op zo 19-06-2022 om 22:39 [-0400]:
>> There was also an attempt to cross-compile a rust/cargo bootstrap seed
>> for other architectures (branch: wip-cross-built-rust) but due to
>> complications with building rust as a static archive (it relies on
>> dynamic linking for its macro expand crates), the effort stalled.
>
> FWIW, has it been considered to cross-compile rust non-statically
> (not as a seed, just as an input cross-compiled from another system)?
> Doesn't help for people that cannot offload to x86_64 and don't have
> substitutes from ci.guix.gnu.org or such enabled, but could still be an
> improvement.

This already works, on the branch.  One of the patches carried there
that made it possible has been merged upstream too.  The issue is that
to offer a useful cross-compiled rust on non-x86_64 systems, you need to
move it from system domains; the clean way to do this is to archive a
static binary that depends on nothing else somewhere, and extract it in
a package for the target architecture.

Currently it's not cleanly self-contained because it still references
GCC libraries.

Maxim

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