[MacPorts] #70750: C++ headers are not found after updating to CLTs version 16.0

[MacPorts]

#70750: C++ headers are not found after updating to CLTs version 16.0
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  Reporter:  SaintBol  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  sequoia sonoma
      Port:            |
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Comment (by kencu):

 Replying to [comment:85 dagui0]:

 > 4. Build ports
 > Even I do not install Xcode, building port is possible.

 Although many ports build with just the CLTs installed, some ports require
 a full Xcode installation to build.

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Ticket URL: <https://trac.macports.org/ticket/70750#comment:86>
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