Installing GNU parallel utility on Ubuntu 14.04
Solution 1:
You should be able to install it using apt-get. Per "Where do I get a package for GNU Parallel?":
sudo apt-get install parallel
In your specific case, though, you'll want to run sudo make install instead of just make install. Alternatively, you'll need to specify a new root directory to your configure script.
Solution 2:
./configure && make && sudo make install