[MacPorts] #56326: rev-upgrade considers gcc as broken due to libstdc++

[MacPorts]

#56326: rev-upgrade considers gcc as broken due to libstdc++
---------------------+----------------------------
  Reporter:  raimue  |      Owner:  jmroot
      Type:  defect  |     Status:  closed
  Priority:  Normal  |  Milestone:  MacPorts 2.5.0
 Component:  base    |    Version:  2.4.99
Resolution:  fixed   |   Keywords:
      Port:          |
---------------------+----------------------------

Comment (by jmroot):

 If you have gcc or one of the other listed ports installed, please test
 that this works.

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Ticket URL: <https://trac.macports.org/ticket/56326#comment:7>
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