Ruby-on-rails 为什么在 Ubuntu 中安装 JSON gem 时出现错误？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/11058952/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Why do I get an error installing the JSON gem in Ubuntu?
提问by TownWizard
Using Ubuntu, when I run "bundle install" to set up my Rails environment, it throws an error during the JSON gem installation:
使用 Ubuntu，当我运行“ bundle install”来设置我的 Rails 环境时，它会在 JSON gem 安装过程中引发错误：
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.
When I try installing only the JSON 1.7.3 gem it also gives me an error:
当我尝试仅安装 JSON 1.7.3 gem 时，它也会给我一个错误：
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
I've installed RVM and am running Ruby 1.9.3; Why can't it install the JSON gem?
我已经安装了 RVM 并且正在运行 Ruby 1.9.3；为什么它不能安装 JSON gem？
回答by Dylan Markow
Installing the ruby1.9.1-devpackage should fix this for you:
安装ruby1.9.1-dev软件包应该会为您解决这个问题：
sudo apt-get install ruby1.9.1-dev
