bug#48552: mesa 20.2.4 is not reproducible

[Ludovic Courtès]

Hi,

Bone Baboon <bone.baboon@disroot.org> skribis:

> When I run `guix challenge` it shows that these versions of mesa are not
> reproducible.
>
> ```
> /gnu/store/2lyzzw7ybsm3s2n7fgqm17n33n62dl7c-mesa-20.2.4
> /gnu/store/k72zqqiysk3qcwqj917hmlbvqs8shj0x-mesa-20.2.4
> ```
>
> This looks like it could also be related to bug#43849.
>
> `guix describe` outputs:
>
> ```
> Generation 24   May 12 2021 18:06:24    (current)
>   guix d6aeebb
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     branch: master
>     commit: d6aeebb23639258311fdfb9dbf5f903079fde51a
> ```
>
> `guix challenge mesa` outputs:
>
> ```
> /gnu/store/9624kmpsr9mcx0qb1zvbk5hpxymgk0s4-mesa-20.2.4 contents differ:
>   local hash: 0ca468jgq1sgw0llsjrmk1jjny08ndhs4634yp9m9aajr4p0g8q1
>   
> https://ci.guix.gnu.org/nar/lzip/9624kmpsr9mcx0qb1zvbk5hpxymgk0s4-mesa-20.2.4:
>  1kp0l03bdinmnzkn2xqyrl6gymzy9qrh5kbq2i8fbgxb0c1j54m7
>   differing files:
>     /lib/dri/iris_dri.so
>     /lib/dri/nouveau_drv_video.so
>     /lib/vdpau/libvdpau_nouveau.so.1.0.0
>     /lib/libXvMCnouveau.so.1.0.0
>     /lib/libOSMesa.so.8.0.0
>     /lib/libvulkan_radeon.so
>     /lib/libxatracker.so.2.5.0
>
> 1 store items were analyzed:
>   - 0 (0.0%) were identical
>   - 1 (100.0%) differed
>   - 0 (0.0%) were inconclusive
> ```
>
> Attached is the diffoscope output.

This is reportedly fixed by the Meson 0.59.0 upgrade on ‘core-updates’:

  https://issues.guix.gnu.org/49646

Let’s double-check with independent builds later on.

Thanks,
Ludo’.