title: How do a specify a library file dependency for qmake in Qt?
body: <p>Have a SomeLib.pro file that contains:</p>
  
  <pre><code>CONFIG  += debug
  TEMPLATE = lib
  TARGET = SomeLib
  ..
  </code></pre>
  
  <p>Then in a dependent SomeApp.pro:</p>
  
  <pre><code>..
  debug:LIBS += -lSomeLib_debug
  ..
  </code></pre>
  
  <p>How can I force SomeApp to build if I touched SomeLib in qmake?</p>