title: Qmake project dependencies (linked libraries)
body: <p>I have a project that links to a number of shared libraries.</p>
  
  <p>Lets say project A depends on projects B and C</p>
  
  <p>Ideally, I want to impose the following dependencies in my project file:</p>
  
  <ol>
  <li>Rebuild project A if either B or C has been rebuilt since last time project A was built</li>
  <li>Use the output for the relevant configuration (i.e. if building project A in debug mode, then use the debug versions of the libs for project B and C)</li>
  </ol>
  
  <p>Does anyone know how I may explicitly express such dependencies in my project file?</p>