[MacPorts] #62927: Prefer MacPorts clang-11 and clang-10 over clang-9.0

[MacPorts]

#62927: Prefer MacPorts clang-11 and clang-10 over clang-9.0
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  Reporter:  ryandesign   |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.6.4
Resolution:               |   Keywords:
      Port:               |
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Comment (by kencu):

 You might say making the very oldest systems run point on compiler errors
 is kinda unfair...be nice if some capable users with current systems set
 up their defaults to serve up clang-11 on BigSur and Catalina, and started
 wading through the inevitable copious build errors there first...

 but that is unlikely to happen, I suppose.

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Ticket URL: <https://trac.macports.org/ticket/62927#comment:2>
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