[MacPorts] #64086: graphviz-gui and graphviz-gui-devel @2.49.3 fail to build on macOS 12.1 beta (21C5039b) with Xcode 13.2 beta (13C5066c)

[MacPorts]

#64086: graphviz-gui and graphviz-gui-devel @2.49.3 fail to build on macOS 12.1
beta (21C5039b) with Xcode 13.2 beta (13C5066c)
---------------------------+--------------------
  Reporter:  thomasleaute  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:
      Port:  graphviz-gui  |
---------------------------+--------------------

Comment (by thomasleaute):

 Replying to [comment:9 ryandesign]:
 > Ok, so that's not Xcode; that's the command line tools. Use `xcode-
 select` to point to where your Xcode is.

 Indeed, `xcode-select --switch /Applications/Xcode-beta.app` fixed it.
 Thank you for your support.

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Ticket URL: <https://trac.macports.org/ticket/64086#comment:10>
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