sudo apt-get install gcc-3.3 g++-3.3 libqt3-compat-headers libqt3-mt-dev
==== update symlink ====
sudo rm /usr/bin/gcc
sudo rm /usr/bin/cpp
sudo rm /usr/bin/g++
sudo ln -s /usr/bin/gcc-3.3 /usr/bin/gcc
sudo ln -s /usr/bin/cpp-3.3 /usr/bin/cpp
sudo ln -s /usr/bin/g++-3.3 /usr/bin/g++
For realtime:
sudo ln -s /usr/bin/gcc-2.95 /usr/bin/gcc
sudo ln -s /usr/bin/cpp-2.95 /usr/bin/cpp
sudo ln -s /usr/bin/g++-2.95 /usr/bin/g++
==== build ====
make -j 8