[MacPorts] #20309: qt4-x11 doesn't support 10.6 or later

[MacPorts]

#20309: qt4-x11 doesn't support 10.6 or later
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  Reporter:  nerdling  |      Owner:  michaelld
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  1.8.0
Resolution:            |   Keywords:  snowleopard lion
      Port:  qt4-x11   |
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Comment (by RJVB):

 Users who really need X11 support in Qt should support my `port:qt5-kde`
 submission as it contains a subport that provides the XCB (X11) backend. I
 use this myself so plan to support it as long as humanely possible.

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Ticket URL: <https://trac.macports.org/ticket/20309#comment:44>
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