I'm running: Mac OSX 10.6.8 ruby 1.8.7 (2009-06-12 patchlevel 174) [universal-darwin10.0] and rubygems-1.8.9
But when I type in sudo gem install rails
I get the following errors:
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/bcrypt-ruby-3.0.1 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out
Thank for your help.