sudo apt-get install gcc-4.4
sudo apt-get isntall g++-4.4

sudo update-alternatives --remove-all gcc

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 40
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.4 40

sudo update-alternatives --config gcc
sudo update-alternatives --config g++

lrwxrwxrwx 1 root root 7 2011-08-14 15:17 /usr/bin/gcc -> gcc-4.7</p><p>-rwxr-xr-x 1 root root 224544 2011-10-06 05:47 /usr/bin/gcc-4.4</p><p>-rwxr-xr-x 1 root root 237072 2011-09-17 17:25 /usr/bin/gcc-4.5</p><p>-rwxr-xr-x 1 root root 302104 2011-09-17 05:43 /usr/bin/gcc-4.6