Using gcc instead of clang in ghci or ghc

问题:

On Mac OSX 10.9, the default c compiler bundled with Xcode is clang. I installed gcc-4.9 with homebrew. Now I have two different gccs, one is clang, the other is gcc. The default is clang.

I want to use gcc when compiling Haskell files with ghc, and I want also gcc when I launch ghci. How to do this change?

回答1:

Reproducing my directions I've been sharing with haskellers for the past few months via https://gist.github.com/cartazio/7131371

1. Type ghc --print-libdir

   The output will be a path like /Library/Frameworks/GHC.framework/Versions/7.6.3-x86_64/usr/lib/ghc-7.6.3

2. Go to that directory and edit the settings file.

3. There'll be a line indicating the path to the C compiler. It'll probably say /bin/gcc

4. Change that line to /usr/local/bin/gcc-4.8 (or whichever gcc version you brew installed, such as /usr/local/bin/gcc-4.2)