[MacPorts] #70867: clang-17: Undefined symbols: __availability_version_check

[MacPorts]

#70867: clang-17: Undefined symbols: __availability_version_check
-------------------------------------+-------------------------------------
  Reporter:  ryandesign              |      Owner:  mohd-akram
      Type:  defect                  |     Status:  closed
  Priority:  Normal                  |  Milestone:
 Component:  ports                   |    Version:  2.10.1
Resolution:  fixed                   |   Keywords:  highsierra, elcapitan,
      Port:  odin, clang-17,         |  yosemite, mavericks, mountainlion,
  clang-18                           |  lion, snowleopard
-------------------------------------+-------------------------------------

Comment (by cjones051073):

 the build errors with python312 only affected 10.7 AFAIK.

 I won't be providing any patches to fix these old OSes myself, just to be
 clear.

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Ticket URL: <https://trac.macports.org/ticket/70867#comment:8>
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