[MacPorts] #69653: mkvtoolnix-legacy: support Qt4 where Qt5 unavailable

[MacPorts]

#69653: mkvtoolnix-legacy: support Qt4 where Qt5 unavailable
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  Reporter:  barracuda156       |      Owner:  (none)
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.9.2
Resolution:                     |   Keywords:  snowleopard, leopard, tiger
      Port:  mkvtoolnix-legacy  |
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Comment (by barracuda156):

 Replying to [comment:1 i0ntempest]:
 > Supporting older qt5 versions requires older versions (like the current
 mkvtoolnix port), which I am planning to do later. But I don't think this
 port ever supported qt4.

 Ok, if no Qt4 support existed, then perhaps just disable qtgui for systems
 where it cannot be supported? And include qt5 PG conditionally.

 P. S. By the way, what is the point of having a separate port, when
 existing one supports older systems with fallbacks already?
 https://github.com/macports/macports-
 ports/blob/d2f9f6bb49a41d643b1c975e2bcfd6805e0ca2d5/multimedia/mkvtoolnix/Portfile

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Ticket URL: <https://trac.macports.org/ticket/69653#comment:2>
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