dev-libs/gmetadom-{0.1.8,0.2.0} depends on findlib which introduces a bunch of ocaml deps. The findlib dep is not needed only if you want ocaml bindings itsself. Right now if you want eg. gtkmathview -> it needs gmetadom, but that pulls in ocaml and whatnot as well for no reason. Please fix in some nice way.
Added ocaml to IUSE (gmetadom-0.2.1.ebuild).