It was exactly the clang cpp issue. Since I didn't know what I was doing, I reinstalled GHC telling it to use cpphs (at Carter's suggestion), and that worked.
Thanks! > On Jul 13, 2014, at 7:35, Mark Lentczner <[email protected]> wrote: > > If this is happening on OS X and your computer is really clang (gcc -version > will say clang somewhere).... > > ... then please try this simple fix: Edit the compiler settings file, find > the line with "Haskell CPP Flags", and add -P to the list of flags. > > If that works, then the upcoming Haskell Platform release will take care of > doing this, no need to hack this into cabal.
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