New comment by ralsei on void-packages repository

https://github.com/void-linux/void-packages/pull/18386#issuecomment-576802321

Comment:
One thing I noticed when packaging 4.x OpenCV was that /usr/lib/pkgconfig was no longer present.
According to this: https://github.com/opencv/opencv/issues/13154, removal of `pkg-config` functionality was an intentional change of OpenCV 4.x.
This can be added with a compile-time flag, but the name has been changed to `opencv4` rather than `opencv` (the latter being in `actiona`'s build scripts), so the point is moot.

According to this issue on `actiona`'s repo: https://github.com/Jmgr/actiona/issues/90, this issue has been fixed; but only in git, not a "stable" version of the software...