[MacPorts] #60416: freecad @0.18.4_1 build fails High Sierra 10.13.6 on Configuring freecad

[MacPorts]

#60416: freecad @0.18.4_1 build fails High Sierra 10.13.6 on Configuring freecad
--------------------------+------------------------
  Reporter:  abiggerdogg  |      Owner:  mbrethen
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.2
Resolution:               |   Keywords:  highsierra
      Port:  freecad      |
--------------------------+------------------------

Comment (by abiggerdogg):

 Success:

 sudo port install boost +python27
 sudo port install freecad

 Some questions:

 1) I executed 'port info freecad' to see library dependencies and it
 showed:

 Library Dependencies: qt4-mac, boost, Coin-framework, eigen3, freetype,
                       opencascade, py27-backports-functools_lru_cache,
                       py27-matplotlib, py27-pivy, py27-pyside,
                       py27-pyside-tools, py27-shiboken, SoQt, swig, swig-
 python,
                       xercesc3, zlib, libgcc

 Is there a way I could have determined that freecad requires the +python27
 variant myself ?

 2) I also downloaded a FreeCAD version 0.18 binary from the FreeCAD
 website, and it uses an embedded Python 3.6.7 interpreter.  Installed by
 MacPort it uses an embedded Python 2.7.18 interpreter.  Is there anyway I
 can get MacPorts to install a version/variant that uses a Python 3
 interpreter ?

-- 
Ticket URL: <https://trac.macports.org/ticket/60416#comment:3>
MacPorts <https://www.macports.org/>
Ports system for macOS