Gentoolkit
Gentoolkit contains a whole bunch of useful tools to help manage your packages and keep track of what is going on in your system.
Links
revdep-rebuild
Gentoo’s Reverse Dependency rebuilder. It will scan your installed ebuilds to find packages that have become broken as a result of an upgrade of a package they depend on.
To run in pretend mode:
revdep-rebuild -p
Note:
To get
revdep-rebuild
to re-evaluate reverse dependencies delete the temporary files - as suggested when the command fails:rm /root/.revdep-rebuild*.?_*