[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:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:
      Port:  gpsbabel     |
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Comment (by mojca@…):

 Why do you need dependency on Qt4 or Qt5 if there is no app (no `+gui`)?

 The following is also slightly debatable, but I'll try to figure out if I
 can come up with a better proposal:
 {{{
 if { ${os.major} < ${qt5_min_tested_version} } {
     default_variants-append +qt4
 } ...
 }}}

 Qt5 is somewhat problematic on `libstdc++` only, so maybe this if should
 check what the default stdlib is set to as well.

-- 
Ticket URL: <https://trac.macports.org/ticket/50321#comment:4>
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