[MacPorts] #50966: Qt5 PortGroup files; preparing for port:qt5-kde and the KF5 port family

[MacPorts]

#50966: Qt5 PortGroup files; preparing for port:qt5-kde and the KF5 port family
---------------------------+----------------------
  Reporter:  RJVB          |      Owner:  mkae
      Type:  update        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  qt5, qt5-kde  |
---------------------------+----------------------

Comment (by RJVB):

 I guess we'll wait a bit more, also because Qt 5.8.0 is bound to be
 release "anytime now".

 I don't know what Marcus's plans are with port:qt5, but it seems that 5.8
 will still support OS X 10.9 which was already the oldest OS versions
 supported officially by Qt 5.6 if I understand correctly. IOW updating
 shouldn't cause any significant problem; my own tests with the more common
 Qt components support that hypothesis. Of course there's always the
 possibility to introduce a port:qt56 if/when necessary.

 From a KF5 viewpoint it would already be problematic to support 10.8 and
 earlier (possibly unless converted to libc++ but I cannot test such set-
 ups myself). That means that I'd just as well introduce port:qt5-kde at
 version 5.8.0 because that will be justified soon enough by KF5
 dependencies (I already have 1 port that requires components that don't
 exist in Qt 5.6)

 Evidently a port:qt5-kde at 5.8.0 will undo much of the argument of binary
 compatibility with port:qt5 as long as that port remains on 5.6.2 ; in any
 case it will make it formally impossible to go back to port:qt5 once
 dependent ports have been built against the newer Qt5 version.

--
Ticket URL: <https://trac.macports.org/ticket/50966#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS