Ruby gem安装问题
我试图在Windows上安装json如下，但它无法正常工作。 请帮助我同样的可能的resoultion。
C:\Ruby193\bin>gem install --local json-1.8.1.gem Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing json-1.8.1.gem: ERROR: Failed to build gem native extension. C:/Ruby193/bin/ruby.exe -r ./siteconf20140725-4216-11o740j.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/json-1.8.1/gem_make.out RubyGems 2.4.1不会在Windows 1.9及更早版本的Windows上构建本机扩展。
您需要将RubyGems降级到1.8.29。 为此，请运行以下命令：
gem update --system 1.8.29
检查gem版：
gem -v 1.8.29
现在再次尝试你的命令：
gem install --local json-1.8.1.gem
参考： https ： //groups.google.com/forum/#！topic/ rubyinstaller/k19SeJijpKU/ discussion