title: How to launch a qt wayland compositor from terminal without a platform like weston launches
body: <p>i have been using the Qt Wayland plugin for developing a display manager for linux. i tried running the display manager that i built, on a terminal session but it shows like </p>
  
  <pre><code>qt.qpa.plugin: Could not find the Qt platform plugin "wyland" in ""
  This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.
  </code></pre>
  
  <p>i know that it is because i didn't run it on a wayland compositor. but i try building the wayland compositor examples that you have given and it works fine when running in my desktop but when i run it from the terminal i receive the same problem. so how can i start qtwayland compositor from terminal without using --platform xxxx</p>
  
  <p>i like to know how weaston launches from terminal by itself without any platform support and will i be able to launch the qt wayland compositor like that ?</p>