[MacPorts] #56185: npth requires unnamed semaphores; provide those for Darwin 9 and earlier

[MacPorts]

#56185: npth requires unnamed semaphores; provide those for Darwin 9 and earlier
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  Reporter:  ccorn   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  npth    |
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Comment (by barracuda156):

 What happened to this? gnupg2 is still unusable, as of now.

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Ticket URL: <https://trac.macports.org/ticket/56185#comment:8>
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