Linux

Just build it with cmake. Don't expect it to work flawlessly, there's some bugs left to get it running decently (BageDev among others is working on getting that fixed).

Ok. I used cmake. It was ok. But when I used make, there were errors and it didn't compile. Did I do everything good? Or can somebody write some procedure how to compile it right?

You need to have the dependencies (wxWidgets and GLEW, can't remember if there's anything else) and pull the latest code from master. If you get compiler errors, pastebin them.