coreutils : Standard GNU utilities (chmod, cp, dd, ls, sort, tr, head, wc, who,...) ( https://www.gnu.org/software/coreutils/ )
groff : Text formatter used for man pages ( https://www.gnu.org/software/groff/groff.html )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a loongson
For Paludis use this rsync : rsync://gentoo.zugaina.org/loongson-portage
If you have a problem : ycarus(-at-)zugaina.org