[MacPorts] #59078: poppler @0.80.0 build fails with Xcode 11.0

[MacPorts]

#59078: poppler @0.80.0 build fails with Xcode 11.0
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  Reporter:  mndavidoff  |      Owner:  dbevans
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  poppler     |
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Comment (by jmroot):

 Deleting from sysconfigdata won't actually fix anything; the correct
 -isysroot flag still needs to be passed along somehow.

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Ticket URL: <https://trac.macports.org/ticket/59078#comment:2>
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