[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 landonf@…):

 Do these libraries need to be installed in /usr/lib at all? It doesn't
 seem safe/appropriate/etc to be installing any files in a canonically
 operating-system owned location like /usr/lib, with or without
 workarounds.

 Maybe base should treat (/usr, /etc, /var, ...) violations as hard errors
 that can't be overridden with destroot.violate_mtree ? MacPorts could move
 (rather than delete) modified files like some other systems do, but that
 wouldn't fix the this particular issue.

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Ticket URL: <https://trac.macports.org/ticket/42385#comment:5>
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