[Haskell-cafe] best way to deal with #defines when developing ffi's

Hi all, I'm working on an FFI and as usual there are lots of defines in the header files. What's the best way to make these available to the haskell code ? Ideally it could be done automagically, or at least pseudo-magically so that keeping up with changes to the .h wouldn't be too painful. I'm talking about simple constant defines, nothing tricky like structures or similar. Thanks, Brian