title: Completely Clear CMake Cache (Qt Creator)
body: <p>I have come to this problem several times: Something on my system has changed so cmake got confused and cannot parse the project anymore.
  When I just setup everything from scratch it works.</p>
  <p>What I tried to solve the problem was following:</p>
  <ul>
  <li>delete cmake cache</li>
  <li>delete everything in the build folder</li>
  <li>delete the cmakelist.txt.user</li>
  <li>run cmake again -&gt; problem still there</li>
  </ul>
  <p>The only way I could solve it was to make a new build folder and set up the project from scratch, because some settings were still somewhere saved for the old build folder.</p>
  <p>So where are those corrupted settings stored? and how can I reset them without having to change the folder??</p>