January 2004 - HOpenGL

ghc-6.2/opengl
by mai99dnn＠studserv.uni-leipzig.de 24 Jan '04

24 Jan '04

Hi there... The following problem was posted to the haskell-users list: We can not build a opengl application with hopengl. We get this error message: Linking ... Undefined first referenced symbol in file glXGetProcAddressARB /usr/local/share/ghc/lib/ghc-6.2/libHSOpenGL_cbits.a(HsOpenGL.o) glXGetProcAddressARB is a function that returns just a pointer to another function. It is used to find out what special gl features your graphiccard or mesa provides. If there isn't that feature you want, this function returns a NULL pointer. I hope I'm right so far. Our system is a "SunOS 5.8 Generic_108528-27 sun4u sparc SUNW,Ultra-60". I looked around, but I was unable to find any libglX, where this function normally appears. One way to make this all running is to write a foo-bar-glXGetProcAddressARB function that returns everytime the NULL-pointer. But how can I compile this together with the haskell source? Or must I build a *.so library? Or is there a much much easier way to solve this? Cheers Patrick -------------------------------- RockMe http://www.yoursort.de Anikas Pharmaziestudium-Seite http://www.pharmazie.net.ms

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API docs for build-in openGL in GHC 6.2
by HNBeck＠t-online.de 06 Jan '04

06 Jan '04

Hi Sven, I've played with some examples given by your link, and I tried (successfully) to "port" the most primitive examples from HOpenGL distribution for use with the build-in openGL of GHC 6.2 for Mac OS. It seems there are some significant changes. Is there or will there be a description of "porting" rules or even of the whole API, because the documentation of the HOpenGL Web Sites seems to be outdated or at least not apropriate. Greetings Hans

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Compiling HOpenGL Examples with GHC 6.2 Mac OS
by HNBeck＠t-online.de 06 Jan '04

06 Jan '04

Hi, as far as I understand now, for my compiliing problem (see last past with same subject) I must do ghc -package OpenGL -package GLUT --make Cube.hs and in the code doing import OpenGL import GLUT Right so far ? But it seems that the package description in the GHC 6.2 distribution is not right for this packages (OpenGL and GLUT), for both the directory $(InstallDir)/Graphics/Rendering and $(InstallDir)/Graphics/UI is used .....??? Greetings Hans

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Compiling HOpenGL Examples with GHC 6.2 Mac OS
by HNBeck＠t-online.de 06 Jan '04

06 Jan '04

Hi, I'm a Haskell newbee and try to compile the HOpenGL Examples with GHC 6.2 Mac OS X with it's build in openGL stuff, by giving ghc --make Cube.hs the answer is :"not find module GLUT and GL", which is understandable because in the Cube.hs there is the code import GL import GLU But how to say ghc what he needs ? Is it -addpackage or -l option (in other words "import" is the same as include in C?) ? BTW: In the HOpenGL distribution, in the directory lib there is a file GL.hs and GLUT.hs which I think are the files needed for teh example above. But I don't found these files in the new GHC 6.2 distribution, is that correct ? Thanks for your help. Greetings Hans

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