[MacPorts] #49903: libcxx: undo changes to system directories when deactivating (was: libcxx on 10.6 and earlier: undo changes when deactivating)

[MacPorts]

#49903: libcxx: undo changes to system directories when deactivating
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  Reporter:  ryandesign@…  |      Owner:  jeremyhu@…
      Type:  enhancement   |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.4
Resolution:                |   Keywords:
      Port:  libcxx        |
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Ticket URL: <https://trac.macports.org/ticket/49903#comment:2>
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