[MacPorts] #54766: Does port:clang*'s libstdcxx have to be default?

[MacPorts]

#54766: Does port:clang*'s libstdcxx have to be default?
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  Reporter:  RJVB                 |      Owner:  MarcusCalhoun-Lopez
      Type:  defect               |     Status:  assigned
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:
Resolution:                       |   Keywords:
      Port:  clang-4.0 clang-5.0  |
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Comment (by jmroot):

 Replying to [comment:5 raimue]:
 > See attached patch. However, I guess we need to rev-bump all orts using
 the cxx11 port group, as this might change the dependencies. It might be
 easier to move to increase the version of the port group instead.

 The portgroup so far has only added a depends_build, so if there should
 have been a depends_lib then they're all incorrect anyway.

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Ticket URL: <https://trac.macports.org/ticket/54766#comment:15>
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