I figured out cmake. Had to git clone the code for pugixml. I then got a bunch of errors about rapidjson so I installed rapidjson-dev
Running make now and crossing fingers
Got it installed. Here are the additional packages I had to install to get it to work, for anyone who may have had trouble like I did:
After I did the git clone for Emulationstation, I did “cd Emulationstation/external”
then “git clone https://github.com/zeux/pugixml.git” before running cmake.
Now just having trouble with the themes, but that will have to wait until tomorrow.