title: qmake: how to supply multiple variables via command-line?
body: <p><code>qmake</code> allows to supply a variables via a command-line interface like this:</p>
  
  <pre><code>qmake "CONFIG += release" "MY_VAR = hello"
  </code></pre>
  
  <p>So i can use <code>$$MY_VAR</code> inside a <code>.pro</code> file. But is it possible to suply more than one variable such way? I have tried</p>
  
  <pre><code>qmake "CONFIG += release" "MY_VAR = hello" "MY_ANOTHER_VAR = hi"
  </code></pre>
  
  <p>But it did not work (raises error). Any hints?</p>