[MacPorts] #58893: nodejs12 @12.9.1: error: use of undeclared identifier 'strnlen'

[MacPorts]

#58893: nodejs12 @12.9.1: error: use of undeclared identifier 'strnlen'
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  Reporter:  ryandesign  |      Owner:  ci42
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  snowleopard
      Port:  nodejs12    |
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Comment (by kencu):

 legacysupport fixes the `strnlen` error up, but then other errors arise
 later on, so the build still fails.

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Ticket URL: <https://trac.macports.org/ticket/58893#comment:2>
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