¿Por qué recibo un error al instalar la joya JSON en Ubuntu?

Question

Usando Ubuntu, cuando corro "bundle install" configurar mi entorno de Rails, se genera un error durante la instalación de la gema JSON:

Installing json (1.7.3) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. 

/usr/bin/ruby1.9.1 extconf.rb 
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) 
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
    from extconf.rb:1:in `<main>' 

Gem files will remain installed in /home/danny/.bundler/tmp/2040/gems/json-1.7.3 for inspection. 
Results logged to /home/danny/.bundler/tmp/2040/gems/json-1.7.3/ext/json/ext/parser/gem_make.out 
An error occured while installing json (1.7.3), and Bundler cannot continue. 
Make sure that `gem install json -v '1.7.3'` succeeds before bundling. 

Cuando intento instalar solamente la gema JSON 1.7.3 También me da un error:

Building native extensions. This could take a while... 
ERROR: Error installing json: 
    ERROR: Failed to build gem native extension. 

/usr/bin/ruby1.9.1 extconf.rb 
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError) 
    from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require' 
    from extconf.rb:1:in `<main>' 

Gem files will remain installed in /var/lib/gems/1.9.1/gems/json-1.7.3 for inspection. 
Results logged to /var/lib/gems/1.9.1/gems/json-1.7.3/ext/json/ext/parser/gem_make.out 

He instalado RVM y estoy ejecutando Ruby 1.9.3; ¿Por qué no puede instalar la joya JSON?

Answer 1

Instalación del paquete de ruby1.9.1-dev debería solucionar esto para usted:

sudo apt-get install ruby1.9.1-dev