Installing QtVCP

hi all,
I installed the Master brand of linuxcnc. It's using python3..
I built runandplace.

after I changed :

ln -s  /home/mycom/linuxcnc/lib/python/qtvcp/plugins/qtvcp_plugin.py /usr/lib/x86_64-linux-gnu/qt5/plugins/designer/python
 

and run 

/home/mycom/linuxcnc/scripts/rip-environment designer -qt=5

 But have error:

Qtvcp python plugin found:', '/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/python/qtvcp_plugin.py')
Traceback (most recent call last):
  File "/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/python/qtvcp_plugin.py", line 23, in <module>
    from qtvcp.plugins.simplewidgets_plugin import *
  File "/home/mycom/linuxcnc/lib/python/qtvcp/plugins/simplewidgets_plugin.py", line 5, in <module>
    from qtvcp.widgets.simple_widgets import PushButton
  File "/home/mycom/linuxcnc/lib/python/qtvcp/widgets/simple_widgets.py", line 17, in <module>
    from qtvcp.widgets.widget_baseclass import (_HalWidgetBase,
  File "/home/mycom/linuxcnc/lib/python/qtvcp/widgets/widget_baseclass.py", line 19, in <module>
    import hal
  File "/home/mycom/linuxcnc/lib/python/hal.py", line 30, in <module>
    import _hal
ImportError: /home/mycom/linuxcnc/lib/python/_hal.so: undefined symbol: _Py_FalseStruct

Can you help me check it?

thank all

That last line is a typical error of a python2/3 version problem.

Are you sure you compiled for python3?

ok, i rebuild, link to direct again

ln -s  /home/mycom/linuxcnc/lib/python/qtvcp/plugins/qtvcp_plugin.py /usr/lib/x86_64-linux-gnu/qt5/plugins/designer/python```

I can load to qt designer now.But I don't see linuxcnc widgets in the QT designer.
I have libpyqt5_py2.so in 

/usr/lib/x86_64-linux-gnu/qt5/plugins/designer folder.

QT Designer  worked with V2.8.

 thank you so much

libpyqt5_py2.so is the python2 file, for master branch you need the default python3 file, libpyqt5.so which should have already existed.

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Hi phillc54,

I am working on a RPi4.
I manage to build and run Qt5/PyQt5 from source but I get the following:
 
 

Where can I find the libpyqt5_py2.so pluging binary for RPi4?
If not, where can a find the source and build instructions to build a brand new libpyqt5_py2.so plugin for RPi4?

I think it is a platform conflict, so it seems making a rebuild for RPi could be work. 

Thanks!

I seem to recall that there was an issue with the python-opengl module that prevents QtVCP being used on a Pi. I think it was built using OpenGL ES and QtVCP requires OpenGL Desktop. I have no clue as to whether this has changed recently.