Ruby-on-rails 无法使用 Windows 在 rails 中安装 JSON gem
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Cannot install JSON gem in rails using windows
提问by Ray A.
I am doing a bundle install and all of the gems work fine except JSON when it get to the JSON gem I receive this error.
我正在执行捆绑安装，并且当它到达 JSON gem 时，除了 JSON 之外的所有 gem 都可以正常工作，我收到此错误。
Installing json (1.6.1) with native extensions c:/Ruby192/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:55
2:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::E
xtensionBuildError)
c:/Ruby192/bin/ruby.exe extconf.rb
checking for re.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
Any idea on what could be causing this error?
关于可能导致此错误的任何想法？
回答by knut
You are working with Windows, so the RubyInstaller Development Kit may help you: http://rubyinstaller.org/add-ons/devkit/
您正在使用 Windows，因此 RubyInstaller 开发工具包可能会帮助您：http://rubyinstaller.org/add-ons/devkit/
The devkit installs a C-compiler (and some other stuff) to compile C-written parts.
devkit 安装了一个 C 编译器（和其他一些东西）来编译 C 编写的部分。
Install it and try again to install the gem - perhaps with option --platform=ruby.
安装它并再次尝试安装 gem - 也许有选项--platform=ruby。
Details can be found at https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
详细信息可以在https://github.com/oneclick/rubyinstaller/wiki/Development-Kit找到
回答by WarHog
回答by junkle
I'm not an expert in ROR, but the JSON installation issue which I got while installing Redmine was resolved by doing the following:
我不是 ROR 方面的专家，但是我在安装 Redmine 时遇到的 JSON 安装问题是通过执行以下操作解决的：
- Create a make.bat at D:\LANGS\MinGW\bin
- Keep this directory in the PATH
- Edit the above make.bat and add a line, D:\LANGS\MinGW\msys\1.0\bin\make.exe
- 在 D:\LANGS\MinGW\bin 创建一个 make.bat
- 将此目录保留在 PATH 中
- 编辑上面的make.bat，添加一行，D:\LANGS\MinGW\msys\1.0\bin\make.exe
What I realized is, mingw32-make.exe never worked, but 'D:\LANGS\MinGW\msys\1.0\bin\make.exe' worked.
我意识到， mingw32-make.exe 从来没有工作过，但 'D:\LANGS\MinGW\msys\1.0\bin\make.exe' 工作。
Note: My MinGW installation is under D:\LANGS\ . Please make the changes accordingly in your specific installation.
注意：我的 MinGW 安装在 D:\LANGS\ 下。请在您的特定安装中进行相应的更改。
回答by Andy Rossignol
Yes, install the development kit. Also, You will need to run a few command lines to install it (not just simply download and run).
是的，安装开发工具包。此外，您需要运行一些命令行来安装它（不仅仅是下载和运行）。
Download it, run it to extract it somewhere (permanent). Then cd to it, run ruby dk.rb init and ruby dk.rb install to bind it to ruby installations in your path.
下载它，运行它以将其解压缩到某处（永久）。然后 cd 到它，运行 ruby dk.rb init 和 ruby dk.rb install 将它绑定到路径中的 ruby 安装。
A guide for that is here:
一个指南在这里：
https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
