glClearColor not found on some machine, some CL system

[Rujia Liu]

Hi!

I'm new to cl-opengl and was reading this tutorial:

http://nklein.com/2010/06/nehe-tutorial-02-drawing-triangles-and-quadrilaterals/

I've downloaded tut02.lisp, but have trouble running it.

On my machine, ccl 1.6 (windows XP, 32 bit, OpenGL 1.5) gives:

; Warning: Don't know how to setup a hook before saving cores on this Lisp.
; While executing: #<Anonymous Function #xCE06D0E>, in process listener(1).
> Error: Couldn't find function glClearColor
> While executing: CL-OPENGL-BINDINGS::GENERATE-GL-FUNCTION, in process
listener
(1).
> Type :GO to continue, :POP to abort, :R for a list of available restarts.
> If continued: Skip loading "tut02.lisp"
> Type :? for other options.

But SBCL 1.1.4 (win32-thread fork) runs perfectly.

On another machine (windows 7, 64 bit, OpenGL 4.3), both ccl 1.6 and SBCL
(both 32-bit) gave the error message before.

Could anyone give me some suggestions? Thanks in advance

- Rujia
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