[HOpenGL] Makefile for the examples

[Sven Panne]

patrick scheibe wrote:
> [...] and got error-messages like
> 
> Module `GL' is located in package `Main'
> but its interface file claims it is part of package `HOpenGL'

These are not error messages, but warnings. They can safely be ignored
and vanish if a more recent GHC is used, IIRC.

> [...] Is there somebody who can give me a short makefile to see what
> was wrong. [...]

To see which flags are needed if HOpenGL is not installed, have a look
at the log of the build process where the examples subdir is built. If
you did a "make install", no complicated Makefile is needed, just issue:

   ghc --make -package HOpenGL Hello.hs

For more info on packages see

   http://haskell.org/ghc/docs/latest/set/packages.html

Cheers,
   S.