 
      bundle platform
                    Displays platform compatibility information
                  
                  $ bundle platform [--ruby]
Options:
                      --ruby: only display ruby related platform information
                    
                    When not passed any options, platform will display information from your 
                  Gemfile, Gemfile.lock, and Ruby VM about your platform. You'll see output like the following:
                  $ bundle platform
Your platform is: x86_64-linux
Your app has gems that work on these platforms:
* ruby
Your Gemfile specifies a Ruby version requirement:
* ruby 1.9.3
Your current platform satisfies the Ruby version requirement.
                    When the 
                  ruby directive doesn't match the running Ruby VM, it will tell you what part does not.
                  Your Ruby version is 1.9.3, but your Gemfile specified 1.8.7
                    When using the 
                  --ruby flag, it will just display the ruby directive information, so you don't have to parse it from the Gemfile.
                  $ bundle platform --ruby
ruby 1.9.3 (jruby 1.6.7)
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