I got it working. For openers, I got version 1.5 and trashed 1.4. Secondly, I redirected it to save maps elsewhere, because ioquake3/baseq3 has locks that prevent programs from saving files there. I successfully compiled, erm, "something" and ran it. It was a tiny room with two texes missing (I know what I did wrong), WEIRD tex choices for ceiling and floor, no headroom, and an RL in the middle.

But it doesn't matter, cause at least I know it works.
There is stuff in the manual about some of the compilation options, but not about all... like -meta, -super 2, -filter etc.
-CP