[MacPorts] #44193: qt: allow side by side installation of qt4-mac and qt5-mac

[MacPorts]

#44193: qt: allow side by side installation of qt4-mac and qt5-mac
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  Reporter:  mojca@…           |      Owner:  mcalhoun@…
      Type:  enhancement       |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:
      Port:  qt4-mac, qt5-mac  |
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Comment (by rjvbertin@…):

 Replying to [comment:55 michaelld@…]:

 > Also true. Bottom line is that this patch allows Qt4 to build on 10.11
 without resorting to using the 10.10 SDK; it seems to work correctly too.
 So, no matter the performance, this is a win at least for 10.11 users

 Of course, but wrapping it in a conditional in the Portfile also isn't a
 huge deal. And something the Qt devs couldn't do with their build system
 ;)

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Ticket URL: <https://trac.macports.org/ticket/44193#comment:56>
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