ruby-on-rails-3 – 在将redcarpet gem添加到Rails应用程序后运行“$bundle”时,“sh：make：command not found”

在Gemfile中添加“gem”redcarpet“后,运行”$bundle“时,我得到以下内容：

$bundle
...
Using paperclip (2.3.11) 
Using passenger (3.0.7) 
Installing redcarpet (1.17.2) with native extensions /Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:551:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

    /Users/robs/.rvm/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb 
creaTing Makefile

make
sh: make: command not found

Gem files will remain installed in /Users/robs/.rvm/gems/ruby-1.9.2-p180@rails-3.0/gems/redcarpet-1.17.2 for inspection.
Results logged to /Users/robs/.rvm/gems/ruby-1.9.2-p180@rails-3.0/gems/redcarpet-1.17.2/ext/redcarpet/gem_make.out
from /Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:529:in `block in build_extensions'
from /Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:504:in `each'
from /Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:504:in `build_extensions'
from /Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:180:in `install'
from /Users/robs/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/source.rb:101:in `block in install'
from /Users/robs/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/lib/bundler/rubygems_integration.rb:78:in `preserve_paths'
...
from /Users/robs/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.15/bin/bundle:13:in `<top (required)>'
from /Users/robs/.rvm/gems/ruby-1.9.2-p180@rails-3.0/bin/bundle:19:in `load'
from /Users/robs/.rvm/gems/ruby-1.9.2-p180@rails-3.0/bin/bundle:19:in `<main>'@H_696_3@ 
 
Full gist here.
 
 
我正在使用Rvm与不同的宝石.此应用程序正在使用@ rails-3.0 gemset. Here is my previous question关于该设置.
 
 
我注意到“安装redcarpet(1.17.2)…”行包含“/Users/robs/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer”. RB”.这部分是问题吗？我该如何安装？
 
 
谢谢.