I have vista and trying to install ruby gem - 'rdiscount' and get following error...what's the answer for this?
$ gem install rdiscount Building native extensions. This could take a while... ERROR: Error installing rdiscount: ERROR: Failed to build gem native extension. c:/Ruby/bin/ruby.exe extconf.rb checking for random()... no checking for srandom()... no creating Makefile nmake 'nmake' is not recognized as an internal or external command, operable program or batch file. Gem files will remain installed in c:/Ruby/lib/ruby/gems/1.8/gems/rdiscount-1.5.5 for inspection. Results logged to c:/Ruby/lib/ruby/gems/1.8/gems/rdiscount-1.5.5/ext/gem_make.out