sys-devel/binutils and sys-devel/gdb have long been using USE=multitarget to control enabling of all known targets in a single binary rather than just the native target. since clang/llvm[alltargets] seems to do the same thing, they should migrate over to the already existing USE flag name so we stay consistent.
Good idea, consistency++ All ebuilds and metadata.xml have been update to USE=multitarget