[MacPorts] #65308: cpptoml: builds failing for 10.13 and earlier: cmake cannot find libcxx (was: cpptoml: builds failing for 10.13 and earlier)

[MacPorts]

#65308: cpptoml: builds failing for 10.13 and earlier: cmake cannot find libcxx
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  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.2
Resolution:           |   Keywords:
      Port:  cpptoml  |
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Ticket URL: <https://trac.macports.org/ticket/65308#comment:1>
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