install therubyracer 0.11.4

gistfile1.rb

brew unlink apple-gcc42 (if apple-gcc42 was already installed with brew)
brew install apple-gcc42

sudo rm /usr/bin/gcc
sudo rm /usr/bin/g++
sudo rm /usr/bin/cpp
  
sudo ln -s /usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2 /usr/bin/gcc
sudo ln -s /usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/g++-4.2 /usr/bin/g++
sudo ln -s /usr/local/Cellar/apple-gcc42/4.2.1-5666.3/bin/cpp-4.2 /usr/bin/cpp

brew uninstall v8 (if v8 was already installed with brew)
bundle install