[MacPorts] #61477: clang-9.0 fails to build on Big Sur macOS 11.0.1 Xcode 12.2

[MacPorts]

#61477: clang-9.0 fails to build on Big Sur macOS 11.0.1 Xcode 12.2
---------------------------------+--------------------
  Reporter:  jhoyt4              |      Owner:  kencu
      Type:  defect              |     Status:  closed
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:
Resolution:  fixed               |   Keywords:
      Port:  clang-9.0 clang-10  |
---------------------------------+--------------------

Comment (by cjones051073):

 Please, before anyone else submits incorrect 'still doesn't work' reports,
 make sure your port tree is up to date

 {{{
 sudo port sync
 }}}

 then *manually* check to make sure the llvm-{9.0/10} PortFile has the
 changes in the diff

 https://github.com/macports/macports-
 ports/commit/de3b2c09de90fdb69c5bdc1ba14444d9e92c2eba

 only once it does try building / installing again.

-- 
Ticket URL: <https://trac.macports.org/ticket/61477#comment:37>
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