dev-util/
pkgconf

pkg-config compatible replacement with no dependencies other than ANSI C89

https://git.sr.ht/~kaniini/pkgconf

There are no pull requests

You think something is missing here?
Start with filling a new pull requests.

If you also like to help the Gentoo project, you can consider sending a Pull Request via GitHub.
Before doing so, you might want to take a look at the wiki page.