Ruby Header Files OS-X Lion

If you try to install a ruby gem you are likely to receive the following error: ERROR: Error installing caldecott: 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 It clearly mocks about the missing ruby.h file. To overcome this issue you need to have XCode installed and there goto “Preferences/Downloads” Download the “Command Line Tools”. Afterwards the gem installation should succeed with a...