[MacPorts] #39975: root: Add --enable-cxx11 for some variants

[MacPorts]

#39975: root: Add --enable-cxx11 for some variants
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  Reporter:  jfcaron@…    |      Owner:  mattiafrancescomoro@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.0
Resolution:               |   Keywords:
      Port:  root         |
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Comment (by jonesc@…):

 From memory, I have to specifically disable c++11 support for some reason,
 I think it wasn't compatible with some variants. I forget the details
 now...

 Basically, if enabling it we need to make sure all variants work properly.

 cheers Chris

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Ticket URL: <https://trac.macports.org/ticket/39975#comment:3>
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