Sudo gem install rails - error!

Does any one know what this error mean… I am trying to install rails gem on mac os x from the terminal issuing this command:

sudo gem install rails

and I’m getting this error:

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

        /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h

Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/json-1.6.6 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/json-1.6.6/ext/json/ext/generator/gem_make.out

I have no clue as what all this mean. Please help.

I don’t use OSX but is it necessary to use sudo? Try running just gem install rails.

Also, check out this guide, it should get you moving in the right direction!

Hi iTenzo,

Please see this link, it may be related to your issue: