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Date: -- (:)
From: Gerd Stolpmann <info@g...>
Subject: Re: [Caml-list] FreeBSD + lablglut + thread: bug or not bug
Am Don, 2003-09-11 um 17.11 schrieb Christophe Raffalli:
> Complement:
> 
> GlSurf 2.0 that uses no thread works on my BSD Box (so it is not a 
> problem with the NVidia driver for FreeBSD)
> 
> GlSurf 2.1 also crashes with vmthread ... but a bit later and this is 
> more difficult to reproduce . (I can send the source if you want, but it 
> is not ready for distribution)
> 
> I know that NVidia driver are not thread safe, but only yhe main thread 
> does openGL call and it works for Linux.

Well, it does not depend on whether you give the -thread or -vmthread 
option, because the executable is always linked against libc_r. I
ran into problems with an application that did not use threads at all.

You can try to disable the link against libc_r by modifying O'Caml's
configure script, and then use -vmthread to select the bytecode
implementation. If the program works then, it is very likely that libc_r
is broken.

> Gerd Stolpmann wrote:
> > Am Don, 2003-09-11 um 15.49 schrieb Christophe Raffalli:
> > 
> >>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)
> > 
> > 
> > Maybe another incarnation of this (non-)bug:
> > 
> > http://caml.inria.fr/bin/caml-bugs/not%20a%20bug?id=1820;page=47;user=guest
> > 
> > It seems that FreeBSD's libc_r is not stable enough.
> > 
> > Gerd
> 
> -- 
> Christophe Raffalli
> Université de Savoie
> Batiment Le Chablais, bureau 21
> 73376 Le Bourget-du-Lac Cedex
> 
> tél: (33) 4 79 75 81 03
> fax: (33) 4 79 75 87 42
> mail: Christophe.Raffalli@univ-savoie.fr
> www: http://www.lama.univ-savoie.fr/~RAFFALLI
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-- 
------------------------------------------------------------
Gerd Stolpmann * Viktoriastr. 45 * 64293 Darmstadt * Germany 
gerd@gerd-stolpmann.de          http://www.gerd-stolpmann.de
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