[MacPorts] #63961: MacOS 12.0.1 - Some port installations fail with "requires a full Xcode installation, which was not found on your system"

[MacPorts]

#63961: MacOS 12.0.1 - Some port installations fail with "requires a full Xcode
installation, which was not found on your system"
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  Reporter:  davidfavor  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:
      Port:              |
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Comment (by davidfavor):

 1) XCode has been installed, both XCode + command line tools.

 2) 100s of ports install correctly, many of which run clang, so XCode is
 working.

 3) Only a few ports fail with this message.

 4) What I'm looking for is a fix for the few broken ports.

 Note: If there are some xcode commands I can run to verify installation
 (maybe something's broken in Monterey), please post xcode installation
 verification commands.

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Ticket URL: <https://trac.macports.org/ticket/63961#comment:2>
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