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.
Qtile cannot connect to dbus and cause applications to freeze when they attempt to send notifications.
For example, slack will completely freeze when a new message comes in after it attempts to send a notification.
This is caused by an inability to import dbus and pygobject3 as evidenced by this error in the logs
`WARNING libqtile manager.py:setup_eventloop():L240 importing dbus/gobject failed, dbus will not work.`
Also added the python packages dependencies mentioned here:
https://github.com/NixOS/nixpkgs/issues/45039https://github.com/DavHau/mach-nix/issues/125
* Use absolute paths to load gobject, pango and cairo.
* Add xcb-cursor support (also with absolute path)
* Avoid tainting child processes environment:
Save PATH and PYTHONPATH in wrapper, and restore them in python code.
* Alter restart process, using $0 saved in wrapper, which allow user
to restart qtile after system rebuild to upgrade it.
The most complex problems were from dealing with switches reverted in
the meantime (gcc5, gmp6, ncurses6).
It's likely that darwin is (still) broken nontrivially.
This seems to have been confusing people, using both xlibs and xorg, etc.
- Avoided renaming local (and different) xlibs binding in gcc*.
- Fixed cases where both xorg and xlibs were used.
Hopefully everything still works as before.
