[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 ldionne):

 The issue discussed in this thread will break even the most C++ program.
 Try this on the command-line:

 {{{
 $ cat <<EOF | clang++ -xc++ - -fsyntax-only
 #include <iostream>
 int main() { }
 EOF
 }}}

 If that works (i.e. doesn't output any error), then whatever issue you're
 running into when building a package is not the same issue as what's being
 discussed in this thread. If that fails with some issue like a header not
 being found, then that's the issue discussed in this thread.

-- 
Ticket URL: <https://trac.macports.org/ticket/70750#comment:75>
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