[MacPorts] #61647: mpv build fails on Mojave

[MacPorts]

#61647: mpv build fails on Mojave
---------------------------+--------------------
  Reporter:  ShadSterling  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.4
Resolution:                |   Keywords:
      Port:  mpv           |
---------------------------+--------------------

Comment (by i0ntempest):

 Looks like another bizarre swift problem. Can you please try building with
 Xcode 10.3? Make sure Xcode is installed at /Applications/Xcode.app just
 in case.

-- 
Ticket URL: <https://trac.macports.org/ticket/61647#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS