Re: Pico Bus error with OpenGL on Mac

Hi Jon,

> I tried this now, removed the -O2 flag from Makefile, and recompiled
> everything, but I still get the Bus error. 

actually, how do you link your gl ffi functions to picolisp?  If you
use the dynamic loading feature, you should remove -O2 from  <at> lib/gcc.l
file too I think.

You could also try to rebuild picolisp (and your gl ffi module) with
-g option (debug) (both in Makefile and  <at> lib/gcc.l).  Then crash it
and open both executable and core file in gdb to see what and where
the problem was.  I think gdb will probably complain that it could not
find your gl ffi library (if it was loaded dynamically).  Not sure how
to avoid that easily but the error/crash message could give some clue
anyway.

It probably is something else, but it is worth trying.

Or, as a workaround, you can try gtk-server http://www.gtk-server.org/
which started as gtk server but supports other libraries as well now
(e.g. OpenGL).  It became a ffi proxy server basically, very useful
for scripting languages and for environments where you don't want to
meddle with ffi (you can also mix 32bit and 64bit code -- they run in
separate processes and also run gui programs on the server without any
x windows installed).  They have some examples on the website and you
can also have a look at an experiment I did
http://logand.com/gtk/gtk-gl-teapot.l a while ago.  If you were
thinking about going this route, I would publish the new improved
version of picolisp gtk-server interface (better callback handling and
glade support) sooner.  That might not be what you want though if want
to stay "native" os x and avoid gtk.

Cheers,

Tomas
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