[MacPorts] #57577: qt4-mac : set the graphicssystem via qtconfig

[MacPorts]

#57577: qt4-mac : set the graphicssystem via qtconfig
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  Reporter:  RJVB         |      Owner:  michaelld
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  qt4-mac      |
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Comment (by RJVB):

 I suppose you are, you were planning to force Native graphics on everyone
 ;)

 Maybe best to touch on it in the graphics system selector tooltip, and
 draw attention to the new feature via the port `notes` feature. I guess
 I'll be doing the PR for this after all!

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Ticket URL: <https://trac.macports.org/ticket/57577#comment:21>
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