The package media-video/mplayer-1.0_pre7-r1 build/compile fails without media-libs/giflib. Mplayer is dependent on giflib and this dependency is not resolved automatically. Once I manually emerged giflib mplayer built/compiled. Thus (in order): emerge media-video/mplayer-1.0_pre7-r1 (failed) emerge media-libs/giflib (success) emerge media-video/mplayer-1.0_pre7-r1 (success) Reproducible: Didn't try Steps to Reproduce:
Unmerge libungif, emerge giflib, run revdep-rebuild, then emerge mplayer.