[MacPorts] #50321: gpsbabel: install an .app, figure out Qt dependencies

[MacPorts]

#50321: gpsbabel: install an .app, figure out Qt dependencies
-------------------------+--------------------------------
 Reporter:  mojca@…      |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  gpsbabel
-------------------------+--------------------------------
 gpsbabel comes with a gui, see http://www.gpsbabel.org/screenshots.html

 However there is something weird about our configuration. `qmake` pull in
 some undeclared dependencies on Qt5 ports, but on the other hand it
 doesn't really install anything (see also #47759) and it doesn't seem to
 build an app. There is an xcodeproject and a bunch of other stuff in the
 sources that I didn't try to fully explore yet. In `Makefile.in` there's a
 target `mac-gui` for example.

 I believe that dependencies should be resolved and a gui should be
 provided, either as a variant or as a subport (maybe subport `gpsbabel-
 gui` would be better?).

-- 
Ticket URL: <https://trac.macports.org/ticket/50321>
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