[MacPorts] #69944: zstd @1.5.6: does not respect macos setting on build

[MacPorts]

#69944: zstd @1.5.6: does not respect macos setting on build
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  Reporter:  lukaso  |      Owner:  MarcusCalhoun
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  zstd    |
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Comment (by lukaso):

 I’ve written a program to check it (or should I say, chat-gpt wrote me a
 program to check it.) Happy to upload if it would be helpful.

 But in this instance it came via a bug report as I’d not incorporated the
 script into the CI system.

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Ticket URL: <https://trac.macports.org/ticket/69944#comment:4>
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