[MacPorts] #71758: fswatch @1.18.0_0: Undefined symbols std::__1::__fs::filesystem::__canonical(std::__1::__fs::filesystem::path const&, std::__1::error_code*)

[MacPorts]

#71758: fswatch @1.18.0_0: Undefined symbols
std::__1::__fs::filesystem::__canonical(std::__1::__fs::filesystem::path
const&, std::__1::error_code*)
--------------------------+--------------------------
  Reporter:  jrandall814  |      Owner:  emcrisostomo
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.10.5
Resolution:               |   Keywords:  highsierra
      Port:  fswatch      |
--------------------------+--------------------------

Comment (by kencu):

 using macports-libcxx often works to fix this on older systems, but
 requires testing to be sure it functions as expected.

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Ticket URL: <https://trac.macports.org/ticket/71758#comment:4>
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