[MacPorts] #57576: llvm 8+ usability

[MacPorts]

#57576: llvm 8+ usability
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  Reporter:  RJVB         |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  llvm-devel   |
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Comment (by kencu):

 but if you did update and replace libcxx to > 7 on an older system, all
 the system software would break, I guess...not sure just now.

 if we ever do try to update libcxx to > 7, we better be very careful.

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Ticket URL: <https://trac.macports.org/ticket/57576#comment:4>
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