[MacPorts] #64059: mono will not install on macOS 12 on M1 hardware

[MacPorts]

#64059: mono will not install on macOS 12 on M1 hardware
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 Reporter:  gctwnl  |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.7.1
 Keywords:          |       Port:  mono
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 I'm working on a brand new Mac that has macOS 12.0.1 installed. I
 installed a fresh MacPorts package for Monterey, then proceeded to upgrade
 the ports that had apparently been moved over to my new machine by
 Migration Assistant.

 mono fails to compile.

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Ticket URL: <https://trac.macports.org/ticket/64059>
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