[Haskell-cafe] build tools and Cabal

Hello, Cabal allows specifying arguments for tools it recognizes on the command line, e.g. runhaskell Setup.hs configure --c2hs-option=some_option Unfortunately, I can't find a way to make this work with .cabal (or .buildinfo) files, except for the specific cases of ghc, hugs, and nhc98 options. Am I missing something? If not, could this be added easily? It would be very helpful as I'm trying to work around the broken cpp Apple provides. Thanks, John