[MacPorts] #39137: Upgrade to zmq-3.2.3 fails

[MacPorts]

#39137: Upgrade to zmq-3.2.3 fails
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 Reporter:  david.w.watson@…  |      Owner:  macports-tickets@…
     Type:  defect            |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:  2.1.3
 Keywords:                    |       Port:  zmq
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 with: error: ‘strndup’ was not declared in this scope

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Ticket URL: <https://trac.macports.org/ticket/39137>
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