cfcfg : Yet another Linux kernel configuration comparator ( https://sourceforge.net/projects/cfcfg/ )
kccmp : A simple tool for comparing two linux kernel .config files ( https://github.com/jeff-dagenais/kccmp )
kernel : A POSIX shell script to compile the kernel with user permissions ( https://github.com/vaeth/kernel/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a mv
For Paludis use this rsync : rsync://gentoo.zugaina.org/mv-portage
If you have a problem : ycarus(-at-)zugaina.org