[MacPorts] #67194: SendMIDI, ReceiveMIDI: The 10.14 SDK (Xcode 10.1+) is required to build JUCE apps

[MacPorts]

#67194: SendMIDI, ReceiveMIDI: The 10.14 SDK (Xcode 10.1+) is required to build
JUCE apps
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  Reporter:  ryandesign  |      Owner:  ryandesign
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:  mavericks yosemite elcapitan sierra
      Port:  SendMIDI    |  highsierra
  ReceiveMIDI            |
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Comment (by ryandesign):

 Thanks! Yes, that does look similar. I wonder why it's happening, since
 I'm using a compiler version that should already have fixed that problem.

 I wonder if it's significant that the errors over there are coming from
 llvm headers while the errors here are coming from libc++ headers.

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Ticket URL: <https://trac.macports.org/ticket/67194#comment:2>
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