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I'm getting the following error when I'm trying to install webrat in my OS X, please suggest me how can i solve this problem.
ERROR:
Error installing webrat: 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/nokogiri-1.4.0 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/nokogiri-1.4.0/ext/nokogiri/gem_make.out
Install xcode and dev tools from your osx dvd, or download them from here:
http://developer.apple.com/technologies/xcode.html