I tried to get rid of GPM in my installation by entering the -gpm useflag in make.conf. After emerge --newuse world I ran emerge --depclean which removed 'gpm'. Fair enough. revdep-rebuild revealed that libmpeg2 was broken, so it got re-installed. That failed because it couldn't find the gpm libraries. So I think libmpeg2 has a missing dependency: gpm.
Created attachment 110533 [details, diff] Patch to libmpeg2-0.4.0b Patch against the latest stable libmpeg2 (x86) to state GPM as a dependency.
*** This bug has been marked as a duplicate of bug 136342 ***
Bah, what is wrong with this Bugzilla. Somehow I'm always unable to find the dupes (yes, I do check for them).