[Haskell-cafe] OpenGL library will not load into GHCi 7.6.1 on Win7 x86-64

Jason Dagit dagitj at gmail.com
Wed Oct 10 01:12:35 CEST 2012

On Tue, Oct 9, 2012 at 1:55 PM, Dan Haraj <devharaj at gmail.com> wrote:

> This is a regression of some sort since the library operates fine within
> GHCi for previous versions of GHC. I don't know whether it is a problem
> with GHCi, the OpenGL library, or some third party. This is the error
> encountered when a module that uses OpenGL tries to load:
> Prelude Main> main
> Loading package OpenGLRaw- ... linking ... ghc.exe: unable to load
> package `OpenGLRaw-'
> Prelude Main> :q
> Leaving GHCi.
> <interactive>: C:\...\OpenGLRaw-\ghc-7.6.1\HSOpenGLRaw-
> unknown symbol `__imp_wglGetProcAddress'
> I have very little of an idea of what's going on here. It would be rather
> painful to debug this myself so any insight is appreciated.

I don't know the solution or the culprit, but normally that symbol is
defined in opengl32.lib/dll and the OpenGLRaw cabal file mentions it as an
extra library.

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