[MacPorts] #71149: libomp @19.1.2 fails to configure on < 10.15

[MacPorts]

#71149: libomp @19.1.2 fails to configure on < 10.15
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  Reporter:  jmroot  |      Owner:  eborisch
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  libomp  |
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Comment (by jmroot):

 Make sure not to use a python port that has libomp in its recursive deps.
 C11 is needed for python 3.11 and later which means a clang dependency on
 older systems.

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Ticket URL: <https://trac.macports.org/ticket/71149#comment:2>
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