title: QT 5.0 QDebug compilation error
body: <p>I am having trouble compiling my code with QDebug, but i really need it. </p>
  
  <pre><code>#include &lt;QCoreApplication&gt;
  #include &lt;QtDebug&gt;
  int main(int argc, char *argv[])
  {
      QCoreApplication a(argc, argv);
      QDebug() &lt;&lt; "hello";
      return a.exec();
  }
  </code></pre>
  
  <p>This is an example of the error i got on this simple test: 
  no matching function for call to 'QDebug::QDebug()'</p>