[MacPorts] #55592: libunwind @5.0.1: unrecognized command line option '-stdlib=libstdc++' with clang-3.4

[MacPorts]

#55592: libunwind @5.0.1: unrecognized command line option '-stdlib=libstdc++' with
clang-3.4
---------------------------+-------------------
  Reporter:  sideeffect42  |      Owner:
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.4.2
Resolution:                |   Keywords:
      Port:  libunwind     |
---------------------------+-------------------
Changes (by sideeffect42):

 * Attachment "main.log" added.

 failed build using clang-3.4

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Ticket URL: <https://trac.macports.org/ticket/55592>
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