OpengGL lockup using GHC 6.6 on Intel Mac

Deborah Goldsmith dgoldsmith at
Fri Dec 1 20:13:31 EST 2006

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.


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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