Thanks Kazuya, that link is perfect.
Basically, I have to explicitly add -lglut :
ghc -package GLUT -lglut HelloWorld.hs -o HelloWorld
Great. GLUT (and now FreeGLUT) remains the simplest
and most reliable "standard" cross-platform OpenGL
windowing API.
(It seems from the link that the information used by
ghc-pkg is wrong, and stems from the GLUT package's
relationship to libraries known as Xmu and Xi.)
Cheers,
Paul
-----Original Message-----
From: Kazuya Sakakihara [mailto:kazuya@gmail.com]
Sent: Thu 22/01/2009 02:14
To: Paul Keir
Cc: haskell-cafe@haskell.org
Subject: Re: [Haskell-cafe] GLUT (glutGet undefined reference)[MESSAGE NOT SCANNED]
Check this thread:
http://groups.google.com/group/fa.haskell/browse_thread/thread/1716fa5e56435...
Kazuya
2009/1/20 Paul Keir
Hi all,
I was hoping to introduce my old pal OpenGL with my new chum, Haskell. I used cabal to install GLUT on my 64-bit Ubuntu machine with GHC 6.8.2 (installed via apt-get/synaptic).
I followed the wiki OpenGLTutorial1 until: ghc -package GLUT HelloWorld.hs -o HelloWorld at which point my screen is filled with errors. The errors begin with:
/home/paul/.cabal/lib/GLUT-2.1.1.2/ghc-6.8.2/libHSGLUT-2.1.1.2.a(Begin.o): In function `szEn_info': (.text+0x26c): undefined reference to `glutGet'
This surprised me a little because I've already seen these same errors recently on two separate Windows boxes. Somehow I'd got the idea it was (on Windows) due to installing from a binary; though I guess the story is the same with apt-get. Should I look for an apt-get switch to reinstall GHC from source instead?
Regards, Paul
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