[MacPorts] #67164: gcc12 @12.2.0_2: gfortran does not find libSystem

[MacPorts]

#67164: gcc12 @12.2.0_2: gfortran does not find libSystem
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  Reporter:  jsalort  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  gcc12    |
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Comment (by kencu):

 and that's because the SDK is named {{{MacOSX13.sdk}}} and so doesn't
 match the regsub test, which requires a decimal point.

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Ticket URL: <https://trac.macports.org/ticket/67164#comment:7>
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