[MacPorts] #66457: libgcc12 build fails during configure test for MPC dep.

[MacPorts]

#66457: libgcc12 build fails during configure test for MPC dep.
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  Reporter:  ragnese          |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:  ventura
      Port:  libgcc12 libmpc  |
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Comment (by cjones051073):

 Note I am unable to run macOS 13 myself (no hardware that supports it) but
 I can also reproduce this on macOS12, so probably related to an Xcode
 update that both macOS12 and 13 now use.

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Ticket URL: <https://trac.macports.org/ticket/66457#comment:5>
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