The way the target is given in the lib-Makefile doesnt work (at least with
my version 2.0(1?) of greencard).
I changed the options line in /HOpenGL-1.00/lib/Makefile from
GREENCARD_OPTS     = -t ghc --name-mangling-scheme=classic
to
GREENCARD_OPTS     = --target ghc --name-mangling-scheme=classic
(Also possible with my version of greencard is "-tghc" without a space
between)

That seems to work. The first file here, GLUT_CBGlobal.gc, runs through the
parser which
correctly generates the output file GLUT_CBGlobal.hs...
but then another error occurs while parsing GLUT_CBWindow.gc:

bash-2.05$ make depend
/cygdrive/c/ghc/ghc-4.08.2/bin/green-card --target
ghc --name-mangling-scheme=cl
assic GLUT_CBGlobal.gc -o GLUT_CBGlobal.hs
/cygdrive/c/ghc/ghc-4.08.2/bin/green-card --target
ghc --name-mangling-scheme=cl
assic GLUT_CBWindow.gc -o GLUT_CBWindow.hs
"GLUT_CBWindow.gc", proc. spec "", line 285: Parse error: Enum, Bounded)
CUnsig
nedInt [
%   GLUT_JOYSTICK_BUTTON_A,
%   GLUT_JOYSTICK_BUTTON_B,
%   GLUT_JOYS
make: *** [GLUT_CBWindow.hs] Error 1

I begin wondering if it is actually possible to run HOpenGL on my computer.
Hm.
The HOpenGL-website says that the library has been heavily tested under
Linux AND Windows.
But it seems that nobody with my configuration has ever compiled the
source package (as far as I know, there are no binary packages available,
are they?).

Has anybody else tried to compile version 1.00 under
win2000/cygwin/greencard2.0(1?)?
Does someone know where else I can get the necessary libraries?

Thanks very much.
Johannes