JSON Gem不會安裝（Windows）

Question

每當我嘗試更新或安裝JSON gem時，都會收到構建錯誤。這些是輸出文件中的結果：

c:/Ruby193/bin/ruby.exe extconf.rb 
creating Makefile 

make 
generating parser-i386-mingw32.def 
compiling parser.c 
In file included from c:/Ruby193/include/ruby-1.9.1/ruby/ruby.h:1360, 
       from c:/Ruby193/include/ruby-1.9.1/ruby.h:32, 
       from ../fbuffer/fbuffer.h:6, 
       from parser.rl:1: 
c:/Ruby193/include/ruby-1.9.1/ruby/missing.h:41: error: redefinition of 'struct timespec' 
c:/Ruby193/include/ruby-1.9.1/ruby/missing.h:48: error: redefinition of 'struct timezone' 
make: *** [parser.o] Error 1 

我開始學習Rails，我想在繼續之前弄清楚這一點。

---

這裏的生成默認的Gemfile：

source 'http://rubygems.org' 

gem 'rails', '3.1.3' 

# Bundle edge Rails instead: 
# gem 'rails',  :git => 'git://github.com/rails/rails.git' 

gem 'sqlite3' 


# Gems used only for assets and not required 
# in production environments by default. 
group :assets do 
    gem 'sass-rails', '~> 3.1.5' 
    gem 'coffee-rails', '~> 3.1.1' 
    gem 'uglifier', '>= 1.0.3' 
end 

gem 'jquery-rails' 

# To use ActiveModel has_secure_password 
# gem 'bcrypt-ruby', '~> 3.0.0' 

# Use unicorn as the web server 
# gem 'unicorn' 

# Deploy with Capistrano 
# gem 'capistrano' 

# To use debugger 
# gem 'ruby-debug19', :require => 'ruby-debug' 

group :test do 
    # Pretty printed test output 
    gem 'turn', '~> 0.8.3', :require => false 
end 

Answer 1

對於需要本地編譯工具建築寶石確保你已經安裝了DevKit。說明在鏈接中提供。

請問您可以添加gem install json的結果還是適當的命令？

Answer 2

如果這僅僅是局部，可以隨時取出和最簡單的方式gem install json_pure代替（100％的Ruby實現，它是緩慢的，但它的工作原理）

Answer 3

這是一個老問題，但這個工作對我來說： https://github.com/oneclick/rubyinstaller/wiki/Troubleshooting#gems_fails_comspec_autorun

具體方案B

REG QUERY "HKCU\Software\Microsoft\Command Processor" /s 

如果你得到一個 '自動運行' 的響應，如下刪除：

REG DELETE "HKCU\Software\Microsoft\Command Processor" /v AutoRun