> that it could be wiser to write a semi > automatic tool for making guile bindings from C headers
For gl.c in the snd (or libxm) tarball, that's tools/makegl.scm, using the predigested header info in gldata.scm. gl.c needs only xen.[ch], I think, so you could easily extract it from Snd. There's a similar (but much fancier) script for the Glib/Gdk/Gtk bindings in xg.c: makexg.scm which uses xgdata.scm. snd-gl.scm has a few examples of using openGL in Guile. I just remembered, you'll also need mus-config.h.
