Ok, It seems you are a really newbie. It is hard to understand such problems when you never did something in OpenGL. A short summery: OpenGl is only the graphic engine providing you with fast drawing operations, textures, polygons, affine transformations, ... If you want to programm some graphical thing using OpenGl, then you have to ensure that the libraries you want to use are on your machine. That means anywhere, in a reachable path has to lie a libgl. BUT that is in most cases not enough, because you (or the Planet.hs sample) need(s) to open a window, where you(it) have(has) to draw in. A very simple way is to use the GLUT library. With the functions of this library you can simple open a window and use it for your graphics: (progName, _args) <- getArgsAndInitialize initialDisplayMode $= [ DoubleBuffered, RGBMode ] initialWindowSize $= Size 500 500 initialWindowPosition $= Position 100 100 createWindow progName All HOpenGl haskell things use the c-libraries. When you compile a HOpenGl-prog and you don't have the underlying c-libs then this happens:
Linking ... /usr/bin/ld: cannot find -lglut collect2: ld returned 1 exit status
because the linker, putting all things finaly together can't find the needed glut library. You should ensure that you have following things on your machine: the gl library the glu lib and the glut lib on my suse box they are here: /usr/lib/libMesaGLU.so.3 /usr/lib/libMesaGL.a /usr/lib/libGLU.la /usr/lib/libGLU.so /usr/lib/libMesaGL.la /usr/lib/libMesaGL.so /usr/lib/libGLU.so.1 /usr/lib/libGL.la /usr/lib/libGL.so /usr/lib/libGLU.a /usr/lib/libglut.a /usr/lib/libglut.so.3 /usr/lib/libglut.la /usr/lib/libglut.so Good luck Patrick