[MacPorts] #62854: mpv @0.33.1_1 configure failure: C11 atomics are required

[MacPorts]

#62854: mpv @0.33.1_1 configure failure: C11 atomics are required
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  Reporter:  mrkapqa  |      Owner:  Ionic
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.4
Resolution:           |   Keywords:  mavericks
      Port:  mpv      |
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Comment (by i0ntempest):

 I believe {{{atomics}}} is in Xcode 7 and later and your OS supports up to
 Xcode 5, so I don't think it's possible to build mpv there. A earlier
 version might build fine but mpv is already hard to maintain with only one
 version.

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Ticket URL: <https://trac.macports.org/ticket/62854#comment:2>
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