I have got this below error.
$ gem install rhodes-3.1.0.gem -l
Building native extensions. This could take a while...
ERROR: Error installing rhodes-3.1.0.gem:
ERROR: Failed to build gem native extension.
'make' is not recognized as an internal or external command,
operable program or batch file.
Gem files will remain installed in c:/InstantRhodes/ruby/lib/ruby/gems/1.8/gems/
rhodes-3.1.0 for inspection.
Results logged to c:/InstantRhodes/ruby/lib/ruby/gems/1.8/gems/rhodes-3.1.0/ext/
Here is the Fix:
install Devkit for windows by following the steps,