Though the uclibc profile has a -*groff, emerging the recent libperl under an uclibc profile pulls groff. This is because the latest libperl ebuilds miss the elibc_uclibc magic : libperl-5.8.5.ebuild:DEPEND="!elibc_uclibc? ( sys-apps/groff ) libperl-5.8.5-r1.ebuild:DEPEND="!elibc_uclibc? ( sys-apps/groff ) libperl-5.8.6.ebuild:DEPEND="!nocxx? ( sys-apps/groff ) libperl-5.8.6-r1.ebuild:DEPEND="!nocxx? ( sys-apps/groff ) libperl-5.8.7.ebuild:DEPEND="!nocxx? ( sys-apps/groff ) libperl-5.8.5 was OK, libperl-5.8.6 is not.
hmm on closer inspection it might just be working as expected. One more bugnumber wasted :)