title: Execute shell command using qmake
body: <p>I want to execute a shell command using <strong>qmake</strong>. The command is : </p>
  
  <blockquote>
    <p>idlpp -S -l cpp MyModel.idl </p>
  </blockquote>
  
  <p>This processes my IDL and generates some .cpp and .h files that I am including in my project. Right now I am executing it manually from a terminal but I want it to be automatically done when I run qmake. </p>
  
  <p>What should I add in my <strong>.pro</strong> file? Is there something equivalent to the <strong>execute_process()</strong> used by <strong>cmake</strong>?</p>