state of the cabal (preprocessors)

[Peter Simons]

Henrik Nilsson writes:

 > {-# OPTIONS ... #-}

I also think that this is the best way of specifying flags
you know the module will need (like -fffi or -cpp), simply
because it's the only way to specify these options if you
want to build the program with --make and cannot pass all
those options to all modules globally.

Peter