[Haskell-cafe] Hugs CPP macros?

Hi, I need to use some conditional compilation in MissingH so that it can work with GHC 6.2, 6.4, and the old/new Hugs libraries. I found the appropriate macros to test for with ghc, but I can't for Hugs. The cpphs-hugs doesn't even define __HUGS__. It seems that only hugs-hc and ffihugs define that, but I don't need them. And where __HUGS__ is defined, it isn't defined with a version number, so it doesn't help me differentiate the Hugs versions. Any suggstions? Thanks, John