[HOpenGL] -O strangeness

[Robert Vollmert]

> > [...] Not exactly a solution, but it should explain the problem...
> 
> Yep, it looks like a missing header problem. A better solution would be
> telling your ghc about a HOpenGL package. Assuming you have successfully
> compiled HOpenGL at /my/home/dir/HOpenGL-1.01, create a package 
> configuration

Thanks to both of you. It compiles fine by hand, and I'll have a look
at the package configuration later.

Cheers,
Robert