title: installing Rails 1.9.3 using RVM gives error message
body: <p>I'm learning Ruby from Michael Hartl's tutorial. I'm following the steps one by one, but I can't get passed this one. After installing RVM, the instructions are:</p>
  
  <ol>
  <li><code>rvm get head &amp;&amp; rvm reload</code></li>
  <li><code>rvm install 1.9.3</code></li>
  </ol>
  
  <p>I can do the first line in the terminal, but when I do the 2nd I get the following error message:</p>
  
  <pre><code>"Error running 'requirements_osx_brew_libs_install autoconf automake libtool pkg-config apple-gcc42 libyaml readline libxml2 libxslt libksba openssl',
  please read /Users/sg/.rvm/log/ruby-1.9.3-p429/1370816489_package_install_autoconf_automake_libtool_pkg-config_apple-gcc42_libyaml_readline_libxml2_libxslt_libksba_openssl.log"
  </code></pre>
  
  <p>What can I do to fix this error? I'm using OS X Mountain Lion on a Retina MacBook Pro if that makes a difference.</p>