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Date: 2003-09-11 (17:27)
From: Issac Trotts <ijtrotts@u...>
Subject: Re: [Caml-list] FreeBSD + lablglut + thread: bug or not bug
On Thu, Sep 11, 2003 at 03:49:35PM +0200, Christophe Raffalli wrote:
> Her is a small file (simplified from GlSurf)
> that SEGV on FreeBSD 4.3 (with NVidia driver ...) and ocaml-3.07beta2
> If you remove the line with thread.yeld it does not SEGV. note:
> thread.yeld is not called since Glut.mainLoop is not started, so I am
>  puzzled.
> Note: all the examples in lablglut distributions appear to work on my 
> FreeBSD box and the same program (GlSurf) works on Linux, windows and OSX.
> So there is a problem when you use FreeBSD+lablGL/GLUT+thread (you need 
> the three of them)
> Here is the file:
> --
>     ignore(Glut.init Sys.argv);
>     Glut.initDisplayMode ~alpha:true ~double_buffer:true ~depth:true () ;
>     Glut.initWindowSize ~w:300 ~h:300;
>     ignore (Glut.createWindow ~title:"bug demo");
>     Glut.idleFunc (Some Thread.yield);
>     print_string "titi";
>     print_newline ()
> --
> And the line used to compile it
> ocamlc -o testbug functionstubs.o -thread -labels -I +lablglut -I 
> +lablGL -I +threads -pp "camlp4o pa_ifdef.cmo -DUNIX" -thread unix.cma 
> threads.cma lablglut.cma lablgl.cma -cclib -lGL -cclib -lGLU -cclib 
> -lXmu
> bash-2.05b$ ./testbug
> Segmentation fault (core dumped)

Thanks for your bug report.  I don't have a BSD box on hand to reproduce 
the bug, so there isn't much I can do about this at the moment.  Did Gerd
Stolpmann's advice help?

Issac Trotts

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