[MacPorts] #62177: mpv @0.33.0_2+audiocd+bluray+bundle+dvd+libarchive+network+opengl+osd+python39+rubberband: cannot convert value of type 'CALayerContentsFormat' to specified type 'String'

[MacPorts]

#62177: mpv
@0.33.0_2+audiocd+bluray+bundle+dvd+libarchive+network+opengl+osd+python39+rubberband:
cannot convert value of type 'CALayerContentsFormat' to specified type
'String'
---------------------+----------------------
  Reporter:  JDLH    |      Owner:  ionic@…
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.4
Resolution:          |   Keywords:
      Port:  mpv     |
---------------------+----------------------

Comment (by acrostich):

 Thank Ken for hinting at the source of this problem (similarly upgrading
 mpv on Mojave kept failing). Following your suggestion, I checked all
 three versions of clang and
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
 was older (Apple LLVM version 10.0.1 (clang-1001.0.46.4)) than the two
 other clang  (11C504) (Apple clang version 11.0.0 (clang-1100.0.33.17)),
 which matched the installed XCode Version 11.3.1.

 What was left as an exercise was how to upgrade the Developer/ version.
 Removing the directory and doing an xcode-select --install reinstalled the
 old version.

 What eventually worked and may help others was to download the
 corresponding Command Line Tools package from
 https://developer.apple.com/download/more/

-- 
Ticket URL: <https://trac.macports.org/ticket/62177#comment:12>
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