[MacPorts] #55709: libcxx @5.0.1_1 build fails with gcc

[MacPorts]

#55709: libcxx @5.0.1_1 build fails with gcc
---------------------+-------------------------------
  Reporter:  potmj   |      Owner:  jeremyhu
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.4.2
Resolution:          |   Keywords:  leopard universal
      Port:  libcxx  |
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Comment (by RJVB):

 I wasn't thinking about a separate port, but that the main cmake port
 could provide a slightly earlier version on systems where that's
 appropriate. That's not unheard of, gives hardly more maintenance pressure
 (3.9 no longer evolves, nor do the target systems) and IIRC the cmake PG
 is already set up to add a path-style dependency.  It was just a thought,
 and IMVHO this would be a decision for the cmake port maintainer.

 Anyway, let's not pollute this ticket with things that won't help the OP.

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Ticket URL: <https://trac.macports.org/ticket/55709#comment:10>
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