[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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Changes (by yan12125):

 * cc: jmroot, yan12125 (added)


Comment:

 The cause is that CPython records the sysroot to build (e.g., in
 `/opt/local/Python.framework/Versions/3.7/lib/python3.7/_sysconfigdata_m_darwin_darwin.py`).
 The same issue occurs on all Python packages with C extensions (e.g.
 py37-curl), and a possible solution might be stripping sysroot paths from
 `_sysconfigdata_*.py`.

 CC the maintainer of cpython ports.

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Ticket URL: <https://trac.macports.org/ticket/59078#comment:1>
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