[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
----------------------+---------------------
  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):

 You’d do something like the following within the relevant header

 {{{
 #if !defined(MAC_OS_X_VERSION_10_12) || MAC_OS_X_VERSION_MAX_ALLOWED <
 MAC_OS_X_VERSION_10_12
 #define kAudioObjectPropertyElementMain kAudioObjectPropertyElementMaster
 #endif
 }}}

 This is more a copy/paste where I didn’t update the version requirement.

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Ticket URL: <https://trac.macports.org/ticket/65653#comment:7>
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