media-libs/libilbc can be used in libav since version 9_beta1, but libav already is converted to multilib.
This seems already done as of version 2.0.2. Going to try and set the target milestone to that version for stable tracking. commit 3d846545957fb287beb9bec7c69361878eb3a234 Author: Alexis Ballier <aballier@gentoo.org> Date: Wed Feb 24 16:23:00 2016 +0100 media-libs/libilbc: update to new upstream and add multilib support Package-Manager: portage-2.2.27 Signed-off-by: Alexis Ballier <aballier@gentoo.org>