[MacPorts] #63118: `llvm-12` build failure in macOS Big Sur 11.4

[MacPorts]

#63118: `llvm-12` build failure in macOS Big Sur 11.4
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  Reporter:  zhiyuanzhai  |      Owner:  kencu@…
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.1
Resolution:               |   Keywords:  bigsur
      Port:  llvm-12      |
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Changes (by zhiyuanzhai):

 * owner:  (none) => kencu@…
 * status:  new => assigned


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Ticket URL: <https://trac.macports.org/ticket/63118#comment:1>
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