Bif is a building framework.
It comes from several shell scripts i wrote for being able to replay building procedures (programming environement, cross compiling, sdk, etc.).
I have put them all together and created a set of bash funcions that help the building of the env (download, unpack, etc). The building receipes are bash scripts that contain all the buiding steps. It's a bit like Slitaz receipes or Gentoo, or buildroot, or OE, but with far more less features (no packages dependancies, no gui configuration, no wide support from the community, ...).
Bif is able to build a system for :
You can clone bif from gitorious at https://gitorious.org/bif.
Once cloned you can run bif script without arguments for getting help.