Created attachment 361332 [details, diff] atk-2.8.0.ebuild.patch Dependency of multilib GTK+. Let me know if there's a cleaner way to handle per-ABI flipping of the --enable-introspection flag.
(Remember to CC multilib team too ;))
Oops, thanks (: Belatedly, should I also make a patch to remove colliding files in the emul-linux ebuilds?
Committed p.masked.