我从http://dl.bintray.com/oneclick/rubyinstaller/rubyinstaller-1.9.3-p448.exe安装了1.9.3 ruby到C：\ Ruby193。
我将https://github.com/downloads/oneclick/rubyinstaller/DevKit-tdm-32-4.5.2-20111229-1559-sfx.exe下载到C：\ ruby_dev_kit并从那里运行ruby dk.rb init然后ruby dk.rb install
这一切都安装成功。
然后，当我运行gem install json时，我一直在努力 安装json（1.4.6）系统找不到指定的路径。
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
checking for ruby/re.h... yes
checking for ruby/encoding.h... yes
creating Makefile
Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/json-1.4.
6 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/gems/json-1.4.6/ext/json/ext/ge
nerator/gem_make.out
An error occurred while installing json (1.4.6), and Bundler cannot continue.
Make sure that `gem install json -v '1.4.6'` succeeds before bundling.
我也尝试过gem install json --platform = ruby 什么都不改变。似乎有c编译器问题，但我正确定义了路径，并且DevKit也相关联。 尝试卸载并安装，没有帮助。有什么想法吗？