Unable to install gem - Failed to build gem native extension - cannot load such file -- mkmf (LoadError)

Unable to install gem - Failed to build gem native extension - cannot load such file -- mkmf (LoadError)

ruby-on-rails ruby ubuntu gem bcrypt

ruby-on-rails

Using --no-rdoc and --no-ri with bundler

ruby-on-rails ruby rubygems gem bundler

ruby-on-rails

ERROR: Error installing capybara-webkit:

ruby-on-rails ruby gem capybara capybara-webkit

ruby-on-rails

Impossible to Install PG gem on my mac with Mavericks

ruby-on-rails postgresql gem osx-mavericks

ruby-on-rails

"gem install therubyracer -v '0.10.2'" on osx mavericks not installing

ruby-on-rails macos gem therubyracer osx-mavericks

ruby-on-rails

gem install permission problem

ruby-on-rails ruby gem

ruby-on-rails

Getting the warning "Insecure world writable dir /home/chance " in PATH, mode 040777 for rails and gem

ruby-on-rails ruby linux gem rvm

ruby-on-rails

Why won't bundler install JSON gem?

ruby-on-rails gem capistrano bundler

ruby-on-rails

Ruby on Rails: Switch from test_unit to rspec

ruby-on-rails rspec gem testunit

ruby-on-rails

is not checked out... bundle install does NOT fix help!

ruby-on-rails ruby git gem

ruby-on-rails

An error occurred while installing rugged

ruby-on-rails git gem gitlab rugged

ruby-on-rails

Why Bundle Install is installing gems in vendor/bundle?

ruby-on-rails ruby gem rvm bundler

ruby-on-rails

How can I pass a parameter for gem installation when I run bundle install?

ruby-on-rails ruby-on-rails-3 gem bundler

ruby-on-rails

Forking a gem for a Rails project

ruby-on-rails ruby fork gem

ruby-on-rails

Can't find libcurl or curl/curl.h (RuntimeError)

ruby-on-rails ruby curl gem curb

ruby-on-rails