Unable to install Rails3

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 ty开发者_开发技巧pe 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.

I think the rails-dev* libraries are missing. So, you can just install the "rails-dev*" libraries on your system and try again to install the rails gem.

You may want to use an open source pre-packaged Rails stack, like RubyStack (disclaimer, I am one of the developers). It is basically an all-in-one installer package, so there is nothing to compile / install (it can as easily be removed)

Are you using the system ruby?

I suggest you:

1. Install rvm
2. Install Ruby 1.9.2 using rvm
3. Install Ruby on Rails 3.1

Good luck

You should check the log files that it pushes errors to, but it's more than likely that various gcc libraries are missing. [Re]Install XCode and try again.