title: configure: error: Cannot build Qt apps, probably due to missing or too old Qt packages
body: <p>thanks for watching my problem. When I want to implement OMNET++5.4.1 on my mac OS (10.13.6) with command ./configure, I encounter the following problems:</p>
  
  <p>configure: error: Cannot build Qt apps, probably due to missing or too old Qt packages. Make sure Qt development packages are installed and newer than Qt 5.4. You can disable Qtenv by setting the WITH_QTENV variable to "no" in configure.user.</p>
  
  <p>If I set the WITH_QTENV variable to “no”, then the configure does succeeds, but I could not use the IDE, and also the test command ./aloha has the following error</p>
  
  <p> Error: The simulation wanted to ask a question, set cmdenv-interactive=true to allow it: "Enter parameter 'Aloha.host[0].iaTime' (unassigned):" -- in module (aloha::Host) Aloha.host[0] (id=3), during network setup.</p>
  
  <p>Anyone can help me fix the problem? thanks very much.</p>