And yet it doesn't list it as a dependancy. I noticed this when it failed in an emerge -atuND world. As the only other libmpeg3 ebuild is hardmasked, this might be helpful to fix. Speaking of which, it sems this happened back in the 1.4 days to at bug #9984. Thank you for your time, Alex Elsayed
UPDATE: It has it as an RDEPEND, which is broken as it is required for building and not running. A simple move to DEPEND should fix it.
RDEPEND="sys-libs/zlib media-libs/jpeg media-libs/a52dec" DEPEND="${RDEPEND} mmx? ( dev-lang/nasm )"