[MacPorts] #69455: poppler @24.03.0: build failure on macOS 10.14 and earlier due to use of std::filesystem

[MacPorts]

#69455: poppler @24.03.0: build failure on macOS 10.14 and earlier due to use of
std::filesystem
-------------------------+-------------------------------------------------
  Reporter:  lukaso      |      Owner:  dbevans
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:  tiger leopard snowleopard lion
                         |  mountainlion mavericks yosemite elcapitan
      Port:  poppler     |  sierra highsierra mojave
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Comment (by lukaso):

 Here's the code that causes the problem:
 https://gitlab.freedesktop.org/poppler/poppler/-/commit/d169ac132d36ba1459000a27cada084e1633859a

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Ticket URL: <https://trac.macports.org/ticket/69455#comment:10>
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