How to install Haskell on Mac OS

Question

I am trying to install Haskell on my Macbook two days and can not get the success.

What I have done:

$ brew install ghc 

Fine. Now I am trying to install

$ cabal install text 

and get next error messages:

Data/Text.hs:1074:4:      error: invalid preprocessing directive       #-}        ^ 

I have googled and found this.

So:

• brew install gcc48

  $ /usr/local/bin/gcc-4.8 --version   gcc-4.8 (GCC) 4.8.2 Copyright (C) 2013 Free Software Foundation, Inc. This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  $ cat /usr/local/lib/ghc-7.6.3/settings   [("GCC extra via C opts", " -fwrapv"),    ("C compiler command", "/usr/local/bin/gcc-4.8"),    ("C compiler flags", " -m64 -fno-stack-protector  -m64"),    ... 

• brew install cabal-install

• cabal install text

And I get the same messages.

How can I fix them ?

Answer 1

brew install ghc cabal-install

If you prefer homebrew.

Note: (Edited to add) Homebrew may have an older (or newer) version of ghc than the Haskell Platform download for OSX, and there might be other differences. You can check the release notes here for the version included in Haskell Platform, as well as other information of interest. brew info ghc cabal-install will give you up to date information about Homebrew's versions.

Note: The last time I did this, I just installed haskell-stack instead, as described in Filippo's answer.