[avr-libc-dev] problem

[Simon Addicott]

i'm trying to use the configure file but when ever i run the command it gives 
me the error output. i've tried install build-essentail, and  libboost (all 
suggestions from freinds) but nothing seems to work. any help?

command:
./configure --prefix=$PREFIX --build =`./config.guess` --host=avr

output:
checking build system type... Invalid configuration `=i686-pc-linux-gnu': 
machine `=i686-pc' not recognized
configure: error: /bin/bash ./config.sub =i686-pc-linux-gnu failed

thanks
simon