- CC=llvm-gcc [gem install byebug / bundle ]
- brew tap homebrew/dupes
- brew install apple-gcc42
- export CC=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2
- export CXX=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/g++-4.2
- export CPP=/usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/cpp-4.2
- brew uninstall v8
- gem uninstall libv8
- gem install therubyracer -v '0.10.2' # specify version