[MacPorts] #64372: gcc10: Error: configuring for an unreleased macOS version x86_64-apple-darwin21

[MacPorts]

#64372: gcc10: Error: configuring for an unreleased macOS version x86_64-apple-
darwin21
-----------------------------------+--------------------
  Reporter:  jlaminie              |      Owner:  (none)
      Type:  update                |     Status:  new
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:
Resolution:                        |   Keywords:
      Port:  gcc10, gcc9, libgcc9  |
-----------------------------------+--------------------

Comment (by hemmlj):

 Please add keyword "12.0" to have this ticket reported in the ticket
 report for MacOs 12 Montery. Thanks!

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Ticket URL: <https://trac.macports.org/ticket/64372#comment:3>
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