[MacPorts] #59772: python38: fails on Leopard: Undefined symbols: :info:build "_pthread_threadid_np"

[MacPorts]

#59772: python38: fails on Leopard: Undefined symbols: :info:build
"_pthread_threadid_np"
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  Reporter:  kencu     |      Owner:  jmroot
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  leopard tiger
      Port:  python38  |
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Comment (by kencu):

 My patch is not really right, Josh is correct. It does allow the build,
 but I need to fix it better. Just have one other thing to do first, then
 I'll work on it.

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Ticket URL: <https://trac.macports.org/ticket/59772#comment:10>
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