$ tar xvfj gmp-4.3.1.tar.bz2
$ mkdir build-gmp
$ cd build-gmp/
$ ../gmp-4.3.1/configure --prefix=$HOME/AVR_ROOT --enable-static --disable-shared
$ make clean
$ make
$ make check
$ make install

$ tar xvfj mpfr-2.4.1.tar.bz2
$ mkdir build-mpfr
$ cd build-mpfr/
$ ../mpfr-2.4.1/configure --prefix=$HOME/AVR_ROOT \
  --with-gmp=$HOME/AVR_ROOT --enable-static --disable-shared
$ make clean
$ make
$ make check
$ make install

$ tar xvfj binutils-2.19.tar.bz2
$ mkdir build-binutils
$ cd build-binutils
$ ../binutils-2.20.51/configure --target=avr --prefix=$HOME/AVR_ROOT \
 --with-gmp=$HOME/AVR_ROOT --with-mpfr=$HOME/AVR_ROOT --disable-nls
$ make clean
$ make
$ make check
$ make install
$ export PATH=$HOME/AVR_ROOT/bin:$PATH

$ tar xvfj gcc-core-4.4.1.tar.bz2
$ mkdir build-gcc
$ cd build-gcc
$ ../gcc-4.4.1/configure --target=avr --prefix=$HOME/AVR_ROOT \
  --with-gmp=$HOME/AVR_ROOT --with-mpfr=$HOME/AVR_ROOT \
  --enable-languages=c --disable-nls --disable-libssp --with-dwarf2
$ make clean
$ make
$ make install

$ tar xvfj avr-libc-1.6.7.tar.bz2 
$ mkdir build-avrlibc
$ cd build-avrlibc
$ ../avr-libc-1.6.7/configure --host=avr \
  --build=$(../avr-libc-1.6.7/config.guess) --prefix=$HOME/AVR_ROOT
$ make clean
$ make
$ make check
$ make install

$ tar xvfz avrdude-5.8.tar.gz 
$ mkdir build-avrdude
$ cd build-avrdude
$ ../avrdude-5.8/configure --prefix=$HOME/AVR_ROOT
$ make clean
$ make
$ make install

export PATH=$PATH:$HOME/AVR_ROOT/bin