http://zenwalk.pinguix.com/user-accounts/rsamurti/avr-gcc/ZENBUILD
http://zenwalk.pinguix.com/user-accounts/rsamurti/avr-gcc/build-avr-gcc.sh
http://ftp.gnu.org/gnu/gcc/gcc-4.7.0/gcc-4.7.0.tar.bz2
