🚀 go-pugleaf

I'm currently working on a project that needs a dynamic object
oriented extension to C. We've talked about designing our own, but
after working through a lot of the design it looks like what we need
might be exactly what Objective C provides. Now that gcc is out,
Objective C is a viable option, but I don't know much about gcc's
implementation. I could use some advice beyond what is in the FAQ.

Is the gcc Objective C compiler stable? Will it port to the same UNIX
architectures that gcc itself ports to?

Is there any documentation for what gcc supports? There's nothing in
the texinfo document yet. I found the file "gnu-objc-issues-1.0.tar.Z"
on prep.ai.mit.edu, which seems to be a discussion of gcc support, but
it's now a year old.

I'm aware that there isn't much of a library yet, but there seems to
be enough to get going. Am I right?

How much runtime information can I get to? In particular, there are
two complicated things I'll need to be able to do:

Dynamic instance variable lookup, something like sel_getUid() for
variables. (In our model, every object's variables are readable by
anyone via a global "probe" accessor function. That "probe" function
should be generated by our system.)

I need to be able to conveniently override the entire message
dispatch, or at least augment it. In particular, we're someday going
to be running this on a parallel system, and objects might be
on different parts of the network. It looks like Next addressed this
problem, and if CORBA support is ever going into Objective C they'll
address the problem, too, so I'm hopeful.

Any help is greatly appreciated,
  Nelson