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[bug#60847] [PATCH] Enable cross-compilation for the pyproject-build-sys
From: |
Maxim Cournoyer |
Subject: |
[bug#60847] [PATCH] Enable cross-compilation for the pyproject-build-system. |
Date: |
Fri, 10 Mar 2023 09:13:12 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hello Christopher,
Christopher Baines <mail@cbaines.net> writes:
[...]
>> Thanks for tipping in. The end goal is to avoid loosing the information
>> of which inputs are native (build inputs) vs regular in the bag, and yes
>> bag->cross-derivation allows that. It appears to me the distinction in
>> the bag representations (native vs cross) was originally perceived
>> useful as some kind of optimization (there's less variables to worry
>> about, and we can squash the inputs/search-paths together, since they're
>> all native anyway), but this information (currently discarded) ends up
>> being very useful even on the build side (to wrap only the target
>> inputs, say, and not all the native/build inputs).
>>
>> So yes, the change long term would be to integrate the
>> bag->cross-derivation logic into bag->derivation, at which point it
>> would be unified for any type of build (the bag representation would be
>> shared between native and cross builds).
>
> Thanks for the explanation, so maybe an alternative to trying to get
> bag->derivation to function differently for different build systems
> would be to push combining the inputs down in to each build system.
>
> Take the gnu-build-system as an example, gnu-build in (guix build-system
> gnu) would be changed to take multiple lists of inputs, rather than a
> single list. It can then combine the lists of inputs as is done in
> bag->derivation, to avoid affecting any packages.
>
> While this does require changing all the build systems, I think it's a
> bit more forward thinking compared to trying to add a kludge in to
> bag->derivation, since hopefully the change there can be the longer term
> one.
I'll see if I have a good enough understanding of the code to make sense
of your suggestion. I'll definitely try it!
Thanks for suggesting.
--
Thanks,
Maxim
[bug#60847] [PATCH] Enable cross-compilation for the pyproject-build-system., Ludovic Courtès, 2023/03/10