[MacPorts] #62721: qmake5 PG and legacysupport PG do not work together

[MacPorts]

#62721: qmake5 PG and legacysupport PG do not work together
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  Reporter:  szhorvat  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:            |
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Comment (by cjones051073):

 I suspect the best way forward here is to augment the qmake5 PG to use
 leacysupport directly, as then it will 'known' when it has to use it and
 can add the flags are required wherever it needs... I'll have a quick
 look.

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Ticket URL: <https://trac.macports.org/ticket/62721#comment:1>
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