The `platform` field is pointless nesting: it's just stuff that happens
to be defined together, and that should be an implementation detail.
This instead makes `linux-kernel` and `gcc` top level fields in platform
configs. They join `rustc` there [all are optional], which was put there
and not in `platform` in anticipation of a change like this.
`linux-kernel.arch` in particular also becomes `linuxArch`, to match the
other `*Arch`es.
The next step after is this to combine the *specific* machines from
`lib.systems.platforms` with `lib.systems.examples`, keeping just the
"multiplatform" ones for defaulting.
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.
After making `ffmpeg` point to the latest `ffmpeg_4`, all packages that
used `ffmpeg` without requiring a specific version now use ffmpeg_3
explicitly so they shouldn't change.
The previous code using substituteInPlace was broken for both 5.9 and
5.11 (latter was broken after a minor release bump). Using patches
should make things fail loudly and prevent modules/qtwebengine.nix from
being littered with version checks.
The patch for 5.12 is only tested to apply.
On aarch64, linking against the vendored ffmpeg fails. Including ffmpeg
as a dependency and passing -system-ffmpeg to qmake fixes this.
Slightly odd conditional in qmakeFlags to avoid altering the list on
non-arm platforms, so that the change doesn't trigger an unneccessary
rebuild.
Fixes#39334
and Fixes#36729
Also, Fixes#36932 (hopefully it's still building)
(This might be able to be able to be cherry-picked to 18.03 but be
careful - chromium is extremely touchy. Probably best to wait for it
to be built successfully on Hydra a few times.)
