OS X Yosemite ruby (1.9.3p484) libv8 (3.11.8.17) therubyracer (0.11.4)

yosemite_ruby_libv8_therubyracer.sh

brew install homebrew/dupes/apple-gcc42
rbenv install 1.9.3-p484
rbenv global 1.9.3-p484
git clone https://github.com/cowboyd/libv8.git
cd libv8
git checkout 3.11
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
bundle install
bundle exec rake clean build binary
gem install pkg/libv8-3.11.8.17.gem
gem install therubyracer -v '0.11.4'

@jpodlech This is only working with Bundler 1.8. I just tried this with Bundler 1.10 and it doesn't work, I'm getting this:

Your Gemfile requires gems that depend on each other, creating an infinite loop. Please remove gem 'rspec-spies' and try again.

The fix is easy, uninstall bundler 1.10 and install 1.8 like this:

gem uninstall bundler
gem install bundler -v 1.8
bundle install
...

works perfectly - thanks @jpodlech

This is how I got it working for me...

replace 3.16.14.7 with your version number.

bundle install
gem install libv8 -v '3.16.14.7' -- --with-system-v8

bundle install
gem uninstall libv8 -v '3.16.14.7' -- --with-system-v8

brew install homebrew/dupes/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
bundle install