[MacPorts] #59835: cmake: strange libc++ "if" condition

[MacPorts]

#59835: cmake: strange libc++ "if" condition
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  Reporter:  michaelld  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  cmake      |
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Comment (by kencu):

 right. I see. It's the  platform darwin bit that is wrong.

 Yes, that should be out of this test, causes great confusion, and is
 wrong.

 I would wrap this whole bit  in a pkatform darwin block to simplify, but I
 see the issue with that now...

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Ticket URL: <https://trac.macports.org/ticket/59835#comment:10>
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