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