Why do I get this "error: undefined reference to `qt_version_tag' "?
<p>I am using Qt 5.7 on Ubuntu 16 LTS machine.</p>

<p>I get this error:</p>

<blockquote>
  <p>(.qtversion[qt_version_tag]+0x0):-1: error: undefined reference to `qt_version_tag'</p>
</blockquote>

<p>This error comes only when I use SDL libraries.</p>