Sorry for late reply. I was not able to find a Ubuntu 14.04 machine. I tried to install vt, and it was installed without a problem. Could you please try again, or check if vt download is complete? You can find its URL in misc/exe_locations file. For soapsnp, you don't have to install it if you don't plan to use it. If you do want to use it, gcc-4.4 is available. You can run the following commands to install gcc-4.4.
sudo apt-get install gcc-4.4 g++-4.4
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.4 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.4 20
sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc 30
sudo update-alternatives --set cc /usr/bin/gcc
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
sudo update-alternatives --set c++ /usr/bin/g++