[MacPorts] #70047: re2 @2024-04-01: fatal error: 'filesystem' file not found

[MacPorts]

#70047: re2 @2024-04-01: fatal error: 'filesystem' file not found
---------------------------+-------------------------
  Reporter:  workflowsguy  |      Owner:  herbygillot
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  highsierra
      Port:  re2 abseil    |
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Comment (by jmroot):

 Recently abseil switched to `compiler.cxx_standard 2017`, which apparently
 means all dependents now have to use the same, but the dependents were not
 updated so re2 is still using 2014.

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Ticket URL: <https://trac.macports.org/ticket/70047#comment:3>
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