[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):

 mpd also needs

 {{{
 #ifndef kAudioHardwareServiceDeviceProperty_VirtualMainVolume
 #define kAudioHardwareServiceDeviceProperty_VirtualMainVolume
 kAudioHardwareServiceDeviceProperty_VirtualMasterVolume
 #endif

 #ifndef kAudioHardwareServiceDeviceProperty_VirtualMainBalance
 #define kAudioHardwareServiceDeviceProperty_VirtualMainBalance
 kAudioHardwareServiceDeviceProperty_VirtualMasterBalance
 #endif
 }}}

 This along with the prior mapping gets mpd to compile on macOS Big Sur
 where before it wouldn't compile with the MacOSX11.sdk

-- 
Ticket URL: <https://trac.macports.org/ticket/65653#comment:9>
MacPorts <https://www.macports.org/>
Ports system for macOS