[MacPorts] #65653: mpd @0.23.8: builds failing for all macOS releases prior to monterey

[MacPorts]

#65653: mpd @0.23.8: builds failing for all macOS releases prior to monterey
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  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.2
Resolution:  fixed    |   Keywords:
      Port:  mpd      |
----------------------+---------------------

Comment (by Gcenx):

 Some additional info

 Also tested on macOS Mojave with PR49 for legacy-support, Xcode11 fails to
 compile but after blacklisting anything below Xcode12 and Macports pulled
 in llvm/clang-14 mpd compiled without issue.

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Ticket URL: <https://trac.macports.org/ticket/65653#comment:10>
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