Installing/Getting Started with liggghts

I am a fresh user of LIGGGHTS just trying to install the program today. I have downloaded the liggghts package via git including the lpp (git clone git://cfdem.git.sourceforge.net/gitroot/cfdem/lpp mylpp) but just can't get any example started after this stage. Do I still need to do a sudo-apt get install before i can get it working? Please help