[MacPorts] #67416: libgcc12 @12.3.0: build failure on Monterey

[MacPorts]

#67416: libgcc12 @12.3.0: build failure on Monterey
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  Reporter:  hululud  |      Owner:  mascguy
      Type:  defect   |     Status:  reopened
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:  monterey
      Port:  gcc12    |
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Comment (by ryandesign):

 If we have no new linker in MacPorts that we can tell the port to use,
 then I declare Xcode 14.0 and 14.0.1 unusable and will downgrade the macOS
 12 buildbot workers to Xcode 13.4.

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Ticket URL: <https://trac.macports.org/ticket/67416#comment:12>
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