title: Porting Qt4 to Qt5: unresolved external symbols
body: <p>Qt5 is the new generation of Qt and it has some changes.</p>
  
  <p>I have a project building well with Qt4. I've downloaded Qt5-VisualStudio2010 package and I'm trying to port my project from Qt4 to Qt5. Problems arise.</p>
  
  <p>All 'include' paths have been fixed well. However, the compiler now reports <strong>hundreds of 'unresolved external symbols'</strong> (almost all function calls, sounds like the compiler can't find any .lib file). I even tried to add all .lib files found in the Qt SDK folder, but useless. The most basic class and method: QApplication::exec(...) also reported as 'unresolved symbol'.</p>
  
  <p>The project file has been changed to fit Qt5 packaging:</p>
  
  <pre><code>myproject.pro file:
  QT += widgets
  </code></pre>
  
  <p>Anyone have got similar experience with this new release of Qt?</p>