[MacPorts] #42385: libcxx/libcxxabi: OS update can render system unusable

[MacPorts]

#42385: libcxx/libcxxabi: OS update can render system unusable
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  Reporter:  cal@…             |      Owner:  jeremyhu@…
      Type:  defect            |     Status:  new
  Priority:  High              |  Milestone:
 Component:  ports             |    Version:  2.2.1
Resolution:                    |   Keywords:
      Port:  libcxx libcxxabi  |
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Comment (by jeremyhu@…):

 Yes, the files need to be in /usr/lib.

 This upgrade, uninstall, removing the new host version case was not
 something I considered.  This has also been this way for quite some time
 with nobody tripping over it, but that's not excuse.

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Ticket URL: <https://trac.macports.org/ticket/42385#comment:6>
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