GENERATOR

How the generators work:

generators/make-opengl-bindings.rb
  The top-level user-interface script for generating the OpenGL bindings,
downloads/updates the gl.tm, gl.spec, enum.spec and enumext.spec from www.opengl.org website.
Could probably have written this in shell script, but whatever, need ruby anyway for the next
script it invokes:

generators/sexpize-gl-spec.rb
  This parses the downloaded spec files and spits them out in s-expression form in one 
big file src/gl.spec.lisp, nothing fancy.

generators/make-bindings-from-spec.lisp
  This is the last thing invoked from make-opengl-bindings.rb and does the bulk of the work.
It takes the src/gl.spec.lisp, sorts out the functions according to categories and extensions
and produces the final lisp and extension asd files:
  lib/opengl-type-map.lisp: for the mappings of type-names in the spec to actual types we use,
  lib/opengl-package.lisp: inserting the export list,
  lib/opengl.lisp: the main 1.0 function definitions,
  lib/opengl-version_1_1.lisp,
  lib/opengl-version_1_2.lisp: for each of the versions found
  lib/opengl-<extension-name>.lisp: for each extension found.

lib/scaffolding.lisp
  This contains the macros: defglfun and defglextfun for resolving type maps and providing
automatic type conversions.