edXのオンライン授業の指示を元に、Ruby on Railsをインストールしてきました。
端末コマンドのリストと、該当する場合は対応する出力を次に示します。
$ sudo apt-get install ruby1.9.1
インストールに成功
$ wget http://production.cf.rubygems.org/rubygems/rubygems-1.8.24.tgz
$ tar zxvf ruby-1.8.24.tgz
$ cd ruby-1..8.24
$ sudo ruby setup.rb
RubyGems 1.8.24 installed
== 1.8.24 / 2012-04-27
* 1 bug fix:
* Install the .pem files properly. Fixes #320
* Remove OpenSSL dependency from the http code path
------------------------------------------------------------------------------
RubyGems installed the following executables:
/usr/bin/gem1.9.1
ここまでは問題ないように見えましたが、レールをインストールしようとして失敗しました:
$ sudo gem install rails
Fetching: i18n-0.6.1.gem (100%)
Fetching: multi_json-1.3.6.gem (100%)
Fetching: activesupport-3.2.8.gem (100%)
Fetching: builder-3.0.3.gem (100%)
Fetching: activemodel-3.2.8.gem (100%)
Fetching: rack-1.4.1.gem (100%)
Fetching: rack-cache-1.2.gem (100%)
Fetching: rack-test-0.6.1.gem (100%)
Fetching: journey-1.0.4.gem (100%)
Fetching: hike-1.2.1.gem (100%)
Fetching: tilt-1.3.3.gem (100%)
Fetching: sprockets-2.1.3.gem (100%)
Fetching: erubis-2.7.0.gem (100%)
Fetching: actionpack-3.2.8.gem (100%)
Fetching: arel-3.0.2.gem (100%)
Fetching: tzinfo-0.3.33.gem (100%)
Fetching: activerecord-3.2.8.gem (100%)
Fetching: activeresource-3.2.8.gem (100%)
Fetching: mime-types-1.19.gem (100%)
Fetching: polyglot-0.3.3.gem (100%)
Fetching: treetop-1.4.10.gem (100%)
Fetching: mail-2.4.4.gem (100%)
Fetching: actionmailer-3.2.8.gem (100%)
Fetching: rake-0.9.2.2.gem (100%)
Fetching: rack-ssl-1.3.2.gem (100%)
Fetching: thor-0.16.0.gem (100%)
Fetching: json-1.7.5.gem (100%)
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
/usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:1:in `<main>'
Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/json-1.7.5 for inspection.
Results logged to /usr/lib/ruby/gems/1.9.1/gems/json-1.7.5/ext/json/ext/generator/gem_make.out