title: rvm install ruby 1.9.3 : Missing required packages
body: <p>I'm trying to switch from Ruby 1.8 to 1.9.3 through RVM : </p>
  
  <pre><code>rvm install 1.9.3
  </code></pre>
  
  <p>But everytime I have a warning : </p>
  
  <pre><code>Missing required packages: autoconf, automake, libtool, pkg-config, libyaml, readline, libxml2, libxslt, libksba, openssl, curl-ca-bundle, sqlite.
  </code></pre>
  
  <p>I tried with </p>
  
  <pre><code>rvm pkg install libyaml
  </code></pre>
  
  <p>but nothing better. Everytime I have this warning, and it's preventing me from installing rails 3 (missing libyaml and openssl). Anyone already solved that ? Thanks for your help.</p>
  
  <p>I'm running Mac OS X 10.8.2</p>