OpengGL lockup using GHC 6.6 on Intel Mac

Deborah Goldsmith dgoldsmith at
Fri Dec 1 21:41:30 EST 2006

This also fails in Hugs (crashes rather than hangs), so it looks like  
it's a problem with the GLUT binding on Mac OS X Intel rather than  
something specific to GHC. I'll see if I can find a PPC machine to  
try it on also.


On Dec 1, 2006, at 5:13 PM, Deborah Goldsmith wrote:

> I can reproduce this with ghc-6.6 built from source as well. I  
> sampled ghc while it was stuck like this, and it looks like it's  
> trying to open a GUI event loop (not surprising if it's opening a  
> window). It looks like something about that is not working.
> Unfortunately, the Intel binary distribution on the downloads page  
> is missing some of the OpenGL C headers, and so won't work properly  
> either.
> Deborah
> On Dec 1, 2006, at 10:19 AM, Joe Jones wrote:
>> Well, it doesn't lock the whole machine but loading Alpha3D.hs int
>> GHCi and typing main causes a window to be displayed with no content
>> and ghc 6.6 locked up, requiring a hard kill.
>> On 12/1/06, Sven Panne <sven.panne at> wrote:
>>> Am Mittwoch, 29. November 2006 19:29 schrieb Joe Jones:
>>> > [...] Anyone know of any issues with the current HOpenGL on  
>>> Intel? [...]
>>> The Haskell versions of the NeHe tutorials work for me on x86_64  
>>> openSUSE 10.1
>>> (GHC 6.6 and bleeding edge GHC from darcs repo, perhaps a few  
>>> weeks old), so
>>> I guess that this is a Mac issue. Jason converted the tutorials  
>>> on a G4, so I
>>> assume it is a problem with Mac + Intel. I don't have access to  
>>> such a
>>> platform, so some help is needed. Do any of the examples from
>>> work on your platform?
>>> Cheers,
>>>    S.
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