To install Haskell in OSX >= 10.8.5? GCC was apparently removed from the current Xcode, here. 
I would like to find a standard way to install Haskell to OSX. 
Not a custom way. 

Brew's packages


haskell-stack
homebrew/emacs/haskell-mode       Caskroom/cask/haskell-platform


Cabal may be one solution. 

How can you install Haskell in OSX?
Haskell Stack is a good option as well. For marketing purposes: Features include automatic installation of packages and separately installed and isolated GHC. Installable from Homebrew with brew install haskell-stack.