glibc's src_configure.eblit:glibc_do_configure() already filters out glibc-compat, is there any reason why c_stubs is still needed? (FYI, it's totally crap code, mixes up function signatures all over the place)
the compat code and the stubs code fulfilled different purposes. the compat was to ease migration between <=glibc-2.0 and newer versions. the oldest version Gentoo cares about nowadays is glibc-2.3.6. the stubs code however is for building small static apps that don't rely on external gconv. that applies today still. who actually uses this, i'm not sure. but the overhead on our side is nil.