[MacPorts] #53231: QGIS @2_18_2_2: error: virtual function 'dataType' has a different return type ('int') than the function it overrides (which has return type 'QGis::DataType')

[MacPorts]

#53231: QGIS @2_18_2_2: error: virtual function 'dataType' has a different return
type ('int') than the function it overrides (which has return type
'QGis::DataType')
-----------------------+----------------------
  Reporter:  gcarlino  |      Owner:  Veence
      Type:  defect    |     Status:  accepted
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.3.5
Resolution:            |   Keywords:
      Port:  QGIS      |
-----------------------+----------------------

Comment (by Veence):

 I have successfully compiled a version of QGis with QT5 and Python 3.6
 using the Portfile I will upload as soon as I finish typing this.
 The only problem you may encounter is qwt61. I have QWT6.1 installed
 (+qt5). Maybe it will work with QWT 6. Please let me know.

 This is what I have installed in terms of Python 36 modules:

 {{{
   py36-appdirs @1.4.3_0 (active)
   py36-certifi @2017.01.23_0 (active)
   py36-cython @0.25.2_0 (active)
   py36-gdal @2.1.0_0 (active)
   py36-nose @1.3.7_0 (active)
   py36-numpy @1.12.1_0+gfortran (active)
   py36-packaging @16.8_0 (active)
   py36-parsing @2.2.0_0 (active)
   py36-pyqt5 @5.8.1_0 (active)
   py36-qscintilla2 @2.10_0 (active)
   py36-setuptools @34.3.3_0 (active)
   py36-sip @4.19.2_0 (active)
   py36-six @1.10.0_0 (active)

 }}}

 I will be on holidays without computer all next week. Please don’t
 hesitate to test and amend the Portfile in the meantime.

--
Ticket URL: <https://trac.macports.org/ticket/53231#comment:57>
MacPorts <https://www.macports.org/>
Ports system for macOS