[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 RJVB):

 > the llvm-bin changes from be6401d19706f7317979dfbd680592cee5f7cf9d

 That doesn't seem to be in a MacPorts repository?

 Out of curiosity, is there software that requires libstdc++ instead of
 libc++ on 10.9 and up?

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Ticket URL: <https://trac.macports.org/ticket/54766#comment:13>
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