Ruby 安装ffi gem时出错

这是我进行捆绑包更新时的错误，所以我按照上面最后一行中的建议执行了以下操作

$ jruby -S bundle update
Fetching gem metadata from https://rubygems.org/.........
Fetching gem metadata from http://controller.c3.mtv:8008/....
Fetching gem metadata from https://rubygems.org/..........
Fetching gem metadata from http://controller.c3.mtv:8008/..
Resolving dependencies...
Using rake (10.1.0)
Using ansi (1.4.3)
Using builder (3.2.2)
Installing ffi (1.9.2)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension
.

        c:/jruby-1.7.4/bin/jruby.exe extconf.rb

make
'make' is not recognized as an internal or external command,
operable program or batch file.


Gem files will remain installed in c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-
1.9.2 for inspection.
Results logged to c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-1.9.2/ext/ffi_c/g
em_make.out
An error occurred while installing ffi (1.9.2), and Bundler cannot continue.
Make sure that `gem install ffi -v '1.9.2'` succeeds before bundling.

然后我尝试了以下方法

    $ gem install ffi -v '1.9.2'
    Building native extensions.  This could take a while...
    ERROR:  Error installing ffi:
            ERROR: Failed to build gem native extension.

            c:/jruby-1.7.4/bin/jruby.exe extconf.rb

    make
    'make' is not recognized as an internal or external command,
    operable program or batch file.

Gem files will remain installed in c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-
1.9.2 for inspection.
Results logged to c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-1.9.2/ext/ffi_c/g
em_make.out

“make”不被识别为内部或外部命令，可操作 程序或批处理文件

看起来像Windows错误消息..您的系统上是否安装了

make

？为了避免在unix工具上出现依赖性问题，我会进行检查

$ gem install ffi
Building native extensions.  This could take a while...
ERROR:  Error installing ffi:
        ERROR: Failed to build gem native extension.

        c:/jruby-1.7.4/bin/jruby.exe extconf.rb

make
'make' is not recognized as an internal or external command,
operable program or batch file.


Gem files will remain installed in c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-
1.9.2 for inspection.
Results logged to c:/jruby-1.7.4/lib/ruby/gems/shared/gems/ffi-1.9.2/ext/ffi_c/g
em_make.out