Why do I get a bcrypt-ruby gem install error?

Question

Getting an error when trying to install the gem devise, the installation is stopping on the gem bcrypt-ruby:

$ gem install bcrypt-ruby
Error installing bcry         


        

Answer 1

Well, it works with Ruby 1.9.2 under RVM on MacOS 10.6.7:

$ ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.6.0]

$ gem install bcrypt-ruby
Fetching: bcrypt-ruby-2.1.4.gem (100%)
Building native extensions.  This could take a while...
Successfully installed bcrypt-ruby-2.1.4
1 gem installed
Installing ri documentation for bcrypt-ruby-2.1.4...
Installing RDoc documentation for bcrypt-ruby-2.1.4...

Try rvm notes and see if it says you need to install anything.