[MacPorts] #65908: lzma @22.01_0 - Unable to upgrade lzma - cxx_stdlib mismatch

[MacPorts]

#65908: lzma @22.01_0 - Unable to upgrade lzma - cxx_stdlib mismatch
---------------------+--------------------
  Reporter:  RobK88  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.7.2
Resolution:          |   Keywords:  lion
      Port:  lzma    |
---------------------+--------------------

Comment (by chillin-):

 Thanks Rob, that worked, but I am unclear on why this install isn't
 building with clang9 by default. It's certainly critical that I
 understand, but this was new to me. Thanks again.

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Ticket URL: <https://trac.macports.org/ticket/65908#comment:6>
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