bug#52574: Cross-compiling glib failure

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hi,

Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> Maxime Devos <maximedevos@telenet.be> skribis:
>
>> Actually, glib's build system (meson-build-system) did not support
>> cross-compilation at all before the merge. Cross-compilation support
>> was added on that branch, but glib's package broke later, presumably in
>> <https://git.savannah.gnu.org/cgit/guix.git/commit/?id=f22f6fc3b6cc6382df3246d192a40a3951b48c37>.
>>
>> The fix would be to replace to wrap the configure flags in a #~,
>> instead of a ´,replace (assoc-ref %outputs "bin") by #$output:bin and
>> adjust the configure flags of glib-with-documentation to use #~ and #$
>> instead of ´ and ,.
>>
>> To avoid rebuilds, some
>> (if (%current-target-system) #~#$output:bin #~(assoc-ref %outputs
>> "bin"))
>> may be needed.
>
> In the case of ‘meson-build-system’, the logical fix IMO would be to
> define ‘%build-inputs‘, ‘%outputs’, etc. when cross-compiling, with the
> patch below.
>
> This would be consistent with the fact that ‘meson-build-system’ defines
> those variables for native builds already.
>
> Thoughts?
>
> Longer-term we can move away from ‘%outputs’, ‘%build-inputs’, & co.,
> but that’s another story.

Seems the proper fix; I'm just wondering; could there be other build
systems that were overlooked needing the same fix?  If so, we should fix
them now too.