[MacPorts] #63707: clang-13: fix for SnowLeopard

[MacPorts]

#63707: clang-13: fix for SnowLeopard
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  Reporter:  kencu     |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  snowleopard haspatch
      Port:  clang-13  |
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Comment (by mojca):

 Ken, would you be willing to add that patch to the git tree (even if the
 build itself is kept disabled for now)?

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Ticket URL: <https://trac.macports.org/ticket/63707#comment:7>
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