[MacPorts] #50955: qwt61 does not build for variant +qt5

[MacPorts]

#50955: qwt61 does not build for variant +qt5
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  Reporter:  benjamin.seppke@…  |      Owner:  michaelld@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.4
Resolution:                     |   Keywords:
      Port:  qwt61              |
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Comment (by rjvbertin@…):

 Without any hacking, I'm only getting things installed under
 ${prefix}/share. I did notice a qmake remark about a missing `target.path`
 specification leading to things not being installed, I wonder if that's
 related.

 In addition: why does this port not use the qmake PortGroup (qmake5, for
 Qt5)?

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Ticket URL: <https://trac.macports.org/ticket/50955#comment:4>
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