These ebuilds come from http://github.com/sjnewbury/multilib-overlay.
If you have some problems, go to the official site first.
eclipse-ecj : Eclipse Compiler for Java ( http://www.eclipse.org/ )
gcj-jdk : Java wrappers around GCJ ( http://www.gentoo.org/ )
java-config : Java environment configuration tool ( http://www.gentoo.org/proj/en/java/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a multilib
For Paludis use this rsync : rsync://gentoo.zugaina.org/multilib-portage
If you have a problem : ycarus(-at-)zugaina.org