cmph : Library for building large minimal perfect hashes ( http://cmph.sf.net/ )
libre2 : RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines. ( http://code.google.com/p/re2/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a funroll-loops
For Paludis use this rsync : rsync://gentoo.zugaina.org/funroll-loops-portage
If you have a problem : ycarus(-at-)zugaina.org