Unable to install the gem therubyracer

Question

While running the bundle install command, I encountered the following error:

Installing libv8 (3.3.10.4) with native extensions Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension .
    D:/RailsInstaller/Ruby1.9.2/bin/ruby.exe extconf.rb
* extconf.rb failed * Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=D:/RailsInstaller/Ruby1.9.2/bin/ruby Checking for Python...Unable to build libv8: Python not found!

Gem files will remain installed in D:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9 .1/gems/libv8-3.3.10.4 for inspection. Results logged to D:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/libv8-3.3 .10.4/ext/libv8/gem_make.out An error occured while installing libv8 (3.3.10.4), and Bundler cannot continue.

Make sure that gem install libv8 -v '3.3.10.4' succeeds before bundling.

Environment: Ruby 1.9.2 Rails 3.2.1 Gem : 1.8.17 Gemfile

source 'https://rubygems.org'

    gem 'rails', '3.2.1'

    gem 'sqlite3'

    gem "heroku"

    group :production do
      gem 'pg'
    end

    gem 'execjs'
    gem 'therubyracer'
    gem 'libv8', '3.3.10.4'


    group :assets do
      gem 'sass-rails',   '~> 3.2.3'
      gem 'coffee-rails', '~> 3.2.1'
      gem 'uglifier', '>= 1.0.3'
    end

    gem 'jquery-rails'

Can anybody tell me why I am seeing this error, and how to fix it?

Michael Durrant Michael Durrant · Accepted Answer · 2012-03-08T05:30:00

Did you do gem install libv8 -v '3.3.10.4'

You could also try installing python. For mac see http://www.python.org/getit/mac/

Unable to install the gem therubyracer

1 Answers