[MacPorts] #53200: py35-pyqt5 does not build with sip 4.19

[MacPorts]

#53200: py35-pyqt5 does not build with  sip 4.19
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  Reporter:  dmarteau  |      Owner:
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  py-pyqt5  |
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Comment (by RJVB):

 Jonathan, is what you report in comment:8 the only failure? If so, you
 should probably report it upstream, because PyQt 5.7 is supposed to build
 against Qt 5.6 and thus shouldn't use clearHttpCache() and NoCache()
 unconditionally.

 Note however that it *is* possible to build QtWebEngine 5.7.1 against Qt
 5.6. I've been using such a set-up for a while, and it works, probably
 because QWE's complexity is in the Chromium engine, not in the Qt wrapper
 around it.

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Ticket URL: <https://trac.macports.org/ticket/53200#comment:12>
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