[MacPorts] #61203: gtk3 @3.24.23_0: Can't update because of broken llvm

[MacPorts]

#61203: gtk3 @3.24.23_0: Can't update because of broken llvm
------------------------------+-------------------------------
  Reporter:  rubendibattista  |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:  gtk3, llvm, build
      Port:  gtk3             |
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Comment (by kencu):

 it is gir-scanner, as the tail of your log shows.

 Do you have your {{{cctools}}} installed with +xcode variant as well?

 If your cctools is installed with llvm80 variant, at least we have a clue
 there.

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Ticket URL: <https://trac.macports.org/ticket/61203#comment:9>
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