bcrypt-ruby无法构建gem本机扩展

Question

我是RoR新手，在使用RailsTutorial.org时遇到了安装bcrypt-ruby (v3.0.1) gem (来自gemfile)的问题。在浏览网站上的其他回复时，我不清楚这是不是一个版本不兼容的问题，是一个缺失的ruby-dev环境，还是与Xcode有关，是"ruby extconf.rb“中的一个额外空间还是其他什么。任何建议都将不胜感激。谢谢。

我的环境=OSXv10.8，Ruby 1.9.3p194和Rails 3.2.6。

tj$ bundle install  
Fetching gem metadata from https://rubygems.org/........  
Using rake (0.9.2.2)   
Using i18n (0.6.0)  
Using multi_json (1.3.6)  
Using activesupport (3.2.6)  
Using builder (3.0.0)   
Using activemodel (3.2.6)   
Using erubis (2.7.0)  
Using journey (1.0.4)   
Using rack (1.4.1)   
Using rack-cache (1.2)   
Using rack-test (0.6.1)   
Using hike (1.2.1)   
Using tilt (1.3.3)   
Using sprockets (2.1.3)   
Using actionpack (3.2.6)   
Using mime-types (1.19)   
Using polyglot (0.3.3)   
Using treetop (1.4.10)   
Using mail (2.4.4)  
Using actionmailer (3.2.6)   
Using arel (3.0.2)   
Using tzinfo (0.3.33)   
Using activerecord (3.2.6)   
Using activeresource (3.2.6)   
Using addressable (2.3.1)  
Using annotate (2.5.0) 

Installing bcrypt-ruby (3.0.1) with native extensions 
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /Users/tj/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb 
creating Makefile

make
sh: make: command not found

Gem files will remain installed in /Users/tj/.rvm/gems/ruby-1.9.3-    p194@rails3tutorial2ndEd/gems/bcrypt-ruby-3.0.1 for inspection.  
Results logged to /Users/tj/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/bcrypt-    ruby-3.0.1/ext/mri/gem_make.out  
An error occured while installing bcrypt-ruby (3.0.1), and Bundler cannot continue.
Make sure that `gem install bcrypt-ruby -v '3.0.1'` succeeds before bundling.

Answer 1

在我看来，你的系统上没有make。如果你使用Mac，你需要安装Xcode命令行工具。