title: "Gtk-WARNING **: cannot open display:" when running a gtkmm project in Eclipse
body: <p>I'm trying to run a gtkmm project in Eclipse CDT (On Ubuntu). The project compiles fine, there are no errors reported but when I try to run the project the console prints out this message</p>
  
  <pre><code>"Gtk-WARNING **: cannot open display:"
  </code></pre>
  
  <p>If I go to where the executable is located, in nautilus, I can open it and it runs fine. It's just a problem when trying to run directly from Eclipse.</p>
  
  <p>Thanks,</p>