[bug#67876] request for merging mesa-updates

[John Kehayias <kehayias@sas.upenn.edu>]

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As mentioned on guix-devel, <https://lists.gnu.org/r/guix-devel/2023-12/msg00158.html>, this is a hopefully quick branch to update mesa (new stable release as current one we have ended up without updates) and get security updates for xorg-server-xwayland, via <https://issues.guix.gnu.org/67136>.

That requires a newer xorgproto which rebuilds (most of) the world. As with libx11 ungrafting, this is due mostly to python as far as I can tell, via the tk dependency. Unfortunately, it seems that can't be easily separated out: <https://lists.gnu.org/r/guix-devel/2023-12/msg00165.html>

Anyway, there are currently those 3 commits (mesa, xorgproto, xorg-server-xwayland) building away. I'm seeing lots of builds "failing" with "missing derivation" which I've been manually restarting. The biggest real failure I've spotted just clicking around on Cuirass is gtk on i686-linux. A test fails and I have no idea why and don't see how to disable just that test so far. I tried to see about updating glib and gtk from the gnome branch to see if that fixes it, but it required too much local building so far. So, that is one to keep an eye out. At least the dependencies number around 100.

Still waiting to hear from other people about current branches for what the order will be in merging, but figured I'd get things building either way with the CI looking idle.

Thanks!