[racket] OpenGL (SGL) examples not working in Fedora

Do you have libgdkglext and libgtkglext installed?

At Sat, 16 Jul 2011 14:09:31 +0400, Daniil wrote:
> Hello, Racket users. I was playing with SGL the other day and stumbled
> upon a problem.
> While everything was fine and working well on my Windows computer, I
> had troubles running OpenGL code on my Fedora laptop.
> 
> When I try to run gears.rkt (collects/sgl/examples/gears.rkt) I get
> the following error:
> 
>     send: target is not an object: #f for method: call-as-current
> 
>     === context ===
>     /home/d/racket/collects/racket/private/class-internal.rkt:4549:0: obj-error
>     /home/d/racket/collects/racket/private/class-internal.rkt:3813:0:
> find-method/who
>     /home/d/racket/collects/mred/private/mrcanvas.rkt:121:25:
> with-gl-context method in canvas%
>     /home/d/racket/collects/sgl/examples/gears.rkt:234:4: on-size
> method in gears-canvas%
>     /home/d/racket/collects/racket/private/more-scheme.rkt:149:2:
> call-with-break-parameterization
>     /home/d/racket/collects/racket/private/more-scheme.rkt:265:2:
> call-with-exception-handler
>     /home/d/racket/collects/mred/private/wx/common/queue.rkt:430:6
>     /home/d/racket/collects/mred/private/wx/common/queue.rkt:470:32
>     /home/d/racket/collects/mred/private/wx/common/queue.rkt:607:3
> 
> I have Mesa3D installed and I have successfully run the original
> `glxgears' demo. I also have GL development packages installed, if
> that matters.
> Does anybody have an idea what might be the problem in this case?
> 
> Thanks in advance and pardon my English, I am not a native speaker.
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