These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=dev/rbu/overlay.git;a=summary.
If you have some problems, go to the official site first.
smatch : Static analysis for C ( http://repo.or.cz/w/smatch.git )
sparse : C semantic parser ( http://kernel.org/pub/linux/kernel/people/josh/sparse/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a rbu
For Paludis use this rsync : rsync://gentoo.zugaina.org/rbu-portage
If you have a problem : ycarus(-at-)zugaina.org