[MacPorts] #70750: MacOS Sequoia: C++ headers are not found with CLTs installed

[MacPorts]

#70750: MacOS Sequoia: C++ headers are not found with CLTs installed
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  Reporter:  SaintBol  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  sequoia
      Port:            |
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Comment (by SaintBol):

 Here is a 2019 MBP (the last x86_64 one):
 {{{
 % sysctl machdep.cpu.brand_string
 machdep.cpu.brand_string: Intel(R) Core(TM) i9-9980HK CPU @ 2.40GHz
 }}}

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Ticket URL: <https://trac.macports.org/ticket/70750#comment:27>
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