These ebuilds come from http://code.google.com/p/gentoo-china-overlay.
If you have some problems, go to the official site first.
crash : Tool to investigate kernel core dumps ( http://people.redhat.com/anderson/ )
gdb : GNU debugger ( http://sources.redhat.com/gdb/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoo-china
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoo-china-portage
If you have a problem : ycarus(-at-)zugaina.org