The required modifications in the postInstall phase are only applied on
Linux and the test currently fails on Darwin:
https://github.com/NixOS/nixpkgs/runs/5344236204
> building '/nix/store/45s58pv9j6a19wr9izx49s6i0i4qshxs-mesa-dev-does-not-depend-on-llvm.drv'...
> error: output '/nix/store/czmszfcwdx87vx2wf80lhp3h9skqqcfs-mesa-dev-does-not-depend-on-llvm' is not allowed to refer to the following paths:
> /nix/store/cwb5g57al7iizw456ah9rk49cxb47wi3-mesa-21.3.7-drivers
I've also updated the URL for the RISC-V patch in case the content of
the old URL will change (not sure if that's possible after a merge
request is merged but now that the patch is upstream it seems like a
good idea regardless; and the content has actually already changed so
the old hash wasn't correct anymore).
Note: This update likely causes some issues when running an application
that has a direct dependency on Mesa (e.g. Sway and XWayland) and was
compiled against a different Nixpkgs revision. See 7106fca0fe for more
details regarding that issue.
Note: The update to Mesa 21.0.2 was reverted (25ae1fd29f) because it
caused major issues with Sway (segfault on startup [0]).
This is still the case and might affect all packages that directly
depend on "mesa" (for libgbm or libglapi) but it only causes issues when
the package depends on a "mesa" version that differs from "mesa.drivers"
used for "/run/opengl-driver/". I've noticed this while testing Mesa
updates with the NixOS option "hardware.opengl.package" (as usual)
instead of rebuilding my whole system (which would work). Unfortunately
this can/will likely also cause issues when mixing different channels,
using Flakes/Overlays, etc.
The cause of this should be similar to [1] ("mesa" updates now cause the
same issues that "glibc" updates already do, maybe triggered by certain
Mesa changes) and some additional discussions is in [2],[3].
Note: Don't backport this to NixOS 21.05, at least not without careful
consideration.
[0]: https://github.com/NixOS/nixpkgs/pull/118753#issuecomment-818950977
[1]: https://github.com/NixOS/nixpkgs/issues/95808
[2]: https://github.com/NixOS/nixpkgs/pull/120325
[3]: https://github.com/NixOS/nixpkgs/pull/119558
OpenGL applications should not depend on the Mesa drivers, since these
are supposed to be loaded at runtime from /run/opengl-driver using the
glvnd library. Furthermore, the drivers output has a large closure
since it depends on LLVM.
The only dependency from dev to drivers came from the xatracker
pkg-config file. This commit moves this file into a new
output called driversdev.
continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
