Hi Jordi!

libgccjit is in maintenance mode: I believe it has everything you need if you (or someone else) wants to implement a JIT for GNU Octave (or for any other interpreter)- I just don't want to be the person to do that, as I have enough on my hands with GCC work; I can't become an Octave maintainer too...

I'm more than willing to help answer questions on it if you or someone else from the GNU Octave community wants to do it (are you doing Summer of Code this year?)