[MacPorts] #66886: clang-devel seems to be broken on macOS 12

[MacPorts]

#66886: clang-devel seems to be broken on macOS 12
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  Reporter:  catap        |      Owner:  jeremyhu
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  clang-devel  |
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Comment (by catap):

 Ken, if I use `clang++-mp-devel` it works. It fails only when I call
 `/opt/local/libexec/llvm-XXX/bin/clang++`.

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Ticket URL: <https://trac.macports.org/ticket/66886#comment:3>
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