title: fatal error: 'openssl/bio.h' file not found
body: <p>I am trying to install Apache Thrift on my Mac, but am hitting an issue.
  I followed the installation steps on <a href="https://thrift.apache.org/docs/install/os_x">this page</a>, but when I try to do the steps for installing <code>libevent</code>, I get the following error when running the <code>make</code> command:</p>
  
  <blockquote>
    <p>fatal error because of 'openssl/bio.h' file not found</p>
  </blockquote>
  
  <p><a href="http://i.stack.imgur.com/cInzF.png">Screenshot of actual error</a></p>
  
  <p>I've checked the version of openSSL I'm using, and it's "0.9.8zg"</p>
  
  <p>Any advice on what I should do to fix this?</p>