cd binutils-2.18
./configure --prefix=/usr/local/AVR --target=avr
make
make install
cd ..
cd gcc-4.2.2
./configure --prefix=/usr/local/AVR --target=avr --enable-languages=c --disable-nls --disable-libssp
make
cd ..
make install
cd libc-avr
./configure --prefix=/usr/local/AVR --host=avr
make 
make install
cd ..