title: Qt Undefined Reference To
body: <p>I had some messy code so I finally seperated it into headers and sources, but now I get 136 warnings saying</p>
  
  <pre><code>inline function 'void suchandsuch()' used but never defined
  </code></pre>
  
  <p>and errors</p>
  
  <pre><code>undefined reference to 'Widget::Widget(QWidget*)'
  </code></pre>
  
  <p>I've tried QMake, all the sources are in .pro file, rebuilding, cleaning and deleting all the moc files.</p>