GNU bug report logs - #60847
[PATCH] Enable cross-compilation for the pyproject-build-system.

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: Josselin Poiret <dev <at> jpoiret.xyz>, Christopher Baines <mail <at> cbaines.net>, Simon Tournier <zimon.toutoune <at> gmail.com>, Mathieu Othacehe <othacehe <at> gnu.org>, 60847 <at> debbugs.gnu.org, Tobias Geerinckx-Rice <me <at> tobias.gr>, Lars-Dominik Braun <lars <at> 6xq.net>, Ricardo Wurmus <rekado <at> elephly.net>, jgart <jgart <at> dismail.de>
Subject: [bug#60847] [PATCH] Enable cross-compilation for the pyproject-build-system.
Date: Mon, 06 Mar 2023 18:04:35 +0100

Hello,

Maxim Cournoyer <maxim.cournoyer <at> gmail.com> skribis:

> +++ b/guix/packages.scm
> @@ -1864,28 +1864,30 @@ (define* (bag->derivation bag #:optional context)

[…]

> +  (let ((builder-name (procedure-name (bag-build bag))))
> +    (if (or (bag-target bag)
> +            (eq? 'pyproject-build builder-name))
> +        (bag->cross-derivation bag)

This one part is a showstopper to me, for two reasons:

  1. We cannot rely on ‘procedure-name’ (it’s a debugging aid and it’s
     not guaranteed to return something useful).

  2. Special-casing build systems here is not okay: the bag and build
     system abstractions exist to maintain separation of concerns.

I understand there’s an actual bug to fix and the desire to fix a more
common issue, but I think this one approach is not the way forward.

I hope that makes sense!

Ludo’.

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