I just pulled from git, compiled and ran TrenchBroom 2 on Ubuntu base 14.04 under virtualbox without issue so its working ok for me. Go to TrenchBroom on GitHub and follow the under the NewArchitecture branch. That pretty much lays it out with easy enough directions to follow. Just make sure you installed the required dependencies you don't have first and you should be fine. Also no need to compile wxWidgets 3 from source just search for it and install via your package manager with the other dependencies before you attempt to compile TB2.
If you pulling from git. Open a terminal somewhere enter(paste) in the following lines one at a time.
git clone
https://github.com/kduske/TrenchBroom.gitcd TrenchBroom
git checkout NewArchitecture
The will take you thru the rest which isn't much or hard to do at all. Post problems here and I will help the best I can.
