无法构buildgem原生扩展 – Rails安装
我一直在根据edX在线课程的指示安装Ruby on Rails。
以下是terminal命令的列表，以及相关的输出：
$ sudo apt-get install ruby1.9.1 安装成功
$ 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
到目前为止，一切看起来不错，但我试图安装导轨，并失败：
$ 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
mkmf是mkmf ruby1.9.1-dev包的一部分。 该软件包包含Ruby 1.9.1扩展库所需的头文件。 您需要通过执行以下操作来安装ruby1.9.1-dev软件包：
sudo apt-get install ruby1.9.1-dev
然后你可以像平常一样安装Rails。
一般来说，这样做比较容易：
sudo apt-get install ruby-dev
build议的答案只适用于某些版本的ruby。 一些评论者build议使用ruby-dev; 那也不适合我
sudo apt-get install ruby-all-dev
为我工作。
sudo apt-get install ruby-dev
为我工作
