[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 ATL-Flaneur):

 Replying to [comment:49 EvilJordan]:
 > I removed only the `/Library/Developer/CommandLineTools/usr/include/c++`
 directory and reran `port restore --last` and things seem to be ok!
 >
 > Not sure what the long-term ramifications are, but... yay?
 >
 > UPDATE: ok, that super-didn't work. Lots of failures on later ports.
 Going to try again by removing `CommandLineTools` completely.

 Port ''alex'' fails to build if `/Library/Developer/CommandLineTools/`
 isn't present.

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Ticket URL: <https://trac.macports.org/ticket/70750#comment:52>
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