ruby-on-rails - 通过 RubyGems 安装 JSON 1.8.1 时出错

Question

我的操作系统是 Windows 7 64x Ultimate。我尝试像这样安装 json gem:

gem install json -v '1.8.1'

但是我有一个问题:

Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing json:
        ERROR: Failed to build gem native extension.

    C:/Ruby193/bin/ruby.exe -r ./siteconf20150220-2012-1uff8mn.rb extconf.rb
creating Makefile

make  clean
Makefile:165: *** target pattern contains no `%'.  Stop.

make
Makefile:165: *** target pattern contains no `%'.  Stop.

make failed, exit code 2

Gem files will remain installed in C:/Ruby193/lib/ruby/gems/1.9.1/gems/json-1.8.
1 for inspection.
Results logged to C:/Ruby193/lib/ruby/gems/1.9.1/extensions/x86-mingw32/1.9.1/js
on-1.8.1/gem_make.out

如何安装json 1.8.1？

Answer 1

这似乎是 Rubygems 的一个已知错误。看看 issue page for this bug在github上。

它还没有被修复，但希望很快就会被修复。目前，似乎大多数人都必须降级到 ruby​​gems 2.3.0 才能让它在 Windows 上运行。那应该可以解决您的问题。