Hi Mark,

From what I remember -- I haven't used OpenGL for about a year -- you need something like

ghc --make -package GLUT -lglut Test1.hs assuming that you have both HOpenGL haskell package and OpenGL c library. Cheers, Sean 2009/3/18 Mark Spezzano :

Hi,

I hope I’m posting to the right forum.

I’ve got OpenGL up and running on my Windows Vista machine (finally!) and it runs perfectly well under Eclipse, bringing up a window with a rendered image as expected.

The only issue starts when I try to compile the program without Eclipse (using GHC rather than GHCi like Eclipse does).

I type:

C:\Users\Mark\workspace2\OpenGLPractice\src>ghc --make Test1.hs

And get the following output

Linking Test1.exe ...

C:\Program Files\Haskell\GLUT-2.1.1.2\ghc-6.10.1/libHSGLUT-2.1.1.2.a(Extensions.

o):fake:(.text+0xcc): undefined reference to `glutGetProcAddress@4'

collect2: ld returned 1 exit status

What’s happening here? Obviously it’s a linking issue, but I was wondering whether I need to include some library or file or option to ghc so that it links correctly.

Cheers,

Mark Spezzano

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