[MacPorts] #62426: libc++: using a newer libc++ to build software on older macos systems

[MacPorts]

#62426: libc++: using a newer libc++ to build software on older macos systems
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  Reporter:  kencu                   |      Owner:  kencu
      Type:  enhancement             |     Status:  closed
  Priority:  Normal                  |  Milestone:
 Component:  ports                   |    Version:
Resolution:  fixed                   |   Keywords:
      Port:  libcxx macports-libcxx  |
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Comment (by kencu):

 libcxx-5.0 (our current) has filesystem. It works on 10.6.8.

 Things that fail on 10.7-10.14 build fine on 10.6.8

 It was in experimental in libcxx-5.0 but they made it available generally
 by doing this:

 https://github.com/llvm/llvm-
 project/blob/6a075b6de4cafebec9ca1ff9eec7229a617c93f6/libcxx/CMakeLists.txt#L192

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Ticket URL: <https://trac.macports.org/ticket/62426#comment:48>
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