[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 ryandesign):

 I was just curious for my own purposes whether you had to parse the `otool
 -l` output or if there was a better API for getting just the interesting
 values, and how you were collecting the list of libraries that you needed
 to check.

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Ticket URL: <https://trac.macports.org/ticket/69944#comment:6>
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