[MacPorts] #39699: Unable to build due to unknown compiler version?

[MacPorts]

#39699: Unable to build due to unknown compiler version?
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  Reporter:  frankdmartinez@…  |      Owner:  macports-tickets@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  base              |    Version:  2.1.3
Resolution:                    |   Keywords:
      Port:                    |
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Comment (by larryv@…):

 Does these commands return anything?
 {{{
 % which -a clang
 % xcrun -verbose -find clang
 }}}

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Ticket URL: <https://trac.macports.org/ticket/39699#comment:9>
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