我在安装gem gruff
> C:\DevKit>gem install gruff --source http://rubygems.org
> --platform=ruby Building native extensions. This could take a while... ERROR: Error installing gruff:
> ERROR: Failed to build gem native extension.
>
> C:/Ruby200/bin/ruby.exe extconf.rb
> *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check
> the mkmf.log file for more details. You may need configuration
> options.
>
> Provided configuration options:
> --with-opt-dir
> --without-opt-dir
> --with-opt-include
> --without-opt-include=${opt-dir}/include
> --with-opt-lib
> --without-opt-lib=${opt-dir}/lib
> --with-make-prog
> --without-make-prog
> --srcdir=.
> --curdir
> --ruby=C:/Ruby200/bin/ruby extconf.rb:141:in ``': No such file or directory - identify -version (Errno::ENO ENT)
> from extconf.rb:141:in `configure_compile_options'
> from extconf.rb:16:in `initialize'
> from extconf.rb:548:in `new'
> from extconf.rb:548:in `<main>'
>
>
> Gem files will remain installed in
> C:/Ruby200/lib/ruby/gems/2.0.0/gems/rmagick-2 .16.0 for inspection.
> Results logged to
> C:/Ruby200/lib/ruby/gems/2.0.0/gems/rmagick-2.16.0/ext/RMagick
> /gem_make.out
RubyVersion =＆gt; ruby 2.0.0p353