The code is on GitHub and the developers constantly working on it and using it for its own projects / games.
And it builds cleanly out of the box! I had a cloned it some months ago I pulled the latest changes and went to the make directory and type make and built and did all the tests. And this was on Android on the termux!
This is the sign of very well designed (production) software especially that it has so much tests.
I tried to build llvm-mos (clang for 6592) and it's a massive download, and it's not complete it requires a bunch of libraries which made compilation so difficult on Android that I just gave up.
I will be looking at some code that it generates.