[MacPorts] #58898: libcxx bootstrapping needs a method to upgrade to the +emulatedtls variant on 10.6 and less

[MacPorts]

#58898: libcxx bootstrapping needs a method to upgrade to the +emulatedtls variant
on 10.6 and less
---------------------+---------------------------------------
  Reporter:  kencu   |      Owner:  jeremyhu
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  snowleopard leopard tiger
      Port:  libcxx  |
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Comment (by kencu):

 libcxx just overwrites to previous, so doesn't have to forcibly remove it
 ... but then you cannot tell which libcc is indtalled with a path
 dependency either...

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Ticket URL: <https://trac.macports.org/ticket/58898#comment:13>
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