Compiling Maxima with GCL 2.7.2 pre-release results in empty executable

I built GCL from the 2.7.2 pre-release branch and that was apparently
successful.

I compiled current Maxima from Git with that GCL, and although the
process was apparently successful, it resulted in a maxima executable
that had only a few Maxima symbols in it -- stuff related to autoconf
variables and the like.

I noticed it because CL-USER::RUN was missing, but that's just one of
many items; almost everything is missing.

To be precise, I did something like

(do-symbols (s (find-package "MAXIMA"))
  (if (equalp (symbol-package s) (find-package "MAXIMA")) (print s)))

Maybe the Maxima symbols ended up in some other package? I didn't try
to figure it out.

If anyone has any ideas what's going on, I would be interested to hear.

Robert