Cabal error: invalid preprocessing directive #-}

Question

$ cabal install arithmoi-0.4.0.3

results in multiple errors like:

Math/NumberTheory/Moduli.hs:489:4:
     error: invalid preprocess         


        

Answer 1

Possible workaround here.

xCode 5 comes with clang as c/c++/obj-c compiler. Haskell Platform is not ready for that. The next ghc release will fix that.

Also see here.