[MacPorts] #70444: bind9 @9.20.0 on macOS 10.11.6 needs a more recent compiler

[MacPorts]

#70444: bind9 @9.20.0 on macOS 10.11.6 needs a more recent compiler
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  Reporter:  snowflake  |      Owner:  danielluke
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.9.99
Resolution:             |   Keywords:
      Port:  bind9      |
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Comment (by snowflake):

 It builds OK with macports-clang-17 as well.

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Ticket URL: <https://trac.macports.org/ticket/70444#comment:1>
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