There are a few cases that I know of that need to be solved:
To get the location of a binary tool with Qt you run pkg-config QtCore --variable bindir, then append the binary you want
To get the location of a binary with wayland_scanner you run pkg-config wayland-scanner --variable wayland_scanner
I see a number of pkgs looking at things like libdir, bindir, libexedir, as well as some custom directories like pluginsdir
One X11 package uses this to distinguish whether it was built with thread-local support
Some of this is custom data, but some of this may well just want to act as an interface proxy in cps-config to point to existing data, the wayland_scanner example might just somehow reference the wayland_scanner component.
CPS https://github.com/cps-org/cps/issues/4 is a relevant question here.
There are a few cases that I know of that need to be solved:
pkg-config QtCore --variable bindir, then append the binary you wantpkg-config wayland-scanner --variable wayland_scannerlibdir,bindir,libexedir, as well as some custom directories likepluginsdirSome of this is custom data, but some of this may well just want to act as an interface proxy in cps-config to point to existing data, the wayland_scanner example might just somehow reference the wayland_scanner component.