[MacPorts] #56972: ncarg @6.5.0 rev-upgrade loop due to wrong cxx_stdlib

[MacPorts]

#56972: ncarg @6.5.0 rev-upgrade loop due to wrong cxx_stdlib
---------------------+----------------------
  Reporter:  basmac  |      Owner:  tenomoto
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.5.3
Resolution:          |   Keywords:
      Port:  ncarg   |
---------------------+----------------------

Comment (by jmroot):

 The reason why rev-upgrade is deciding to rebuild a port is printed to the
 terminal before the rebuild is done. It isn't in the log for a particular
 port.

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Ticket URL: <https://trac.macports.org/ticket/56972#comment:4>
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