Attempt of FreeCAD on WSL2 on windows

[qingfeng.xia]

Asked by my colleague to debug error of FreeCAD inside WSL, here is the progress, hopefully it could be helpful

• 1. Pyside2 version confliction, solved

Error:

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      File "/usr/local/lib/python3.6/dist-packages/shiboken2/__init__.py", line 30, in <module>
        _init_pyside_extension()
    <class 'NameError'>: name '_init_pyside_extension' is not defined
    name '_init_pyside_extension' is not defined

Env: Ubuntu 18.04 FreeCAD 0.19 from stable PPA, host is windows 10 x64



To track down the issue by `ldd $(which freecad)`

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        libshiboken2.cpython-36m-x86_64-linux-gnu.so.5.11 => /usr/lib/x86_64-linux-gnu/libshiboken2.cpython-36m-x86_64-linux-gnu.so.5.11 (0x00007f20f4d50000)
        libpyside2.cpython-36m-x86_64-linux-gnu.so.5.11 => /usr/lib/x86_64-linux-gnu/libpyside2.cpython-36m-x86_64-linux-gnu.so.5.11 (0x00007f20f4b1f000)

`gedit /usr/local/lib/python3.6/dist-packages/shiboken2/__init__.py`
it says: `__version__ = "5.15.1"`

Reason:

`pip installed pyside2` version is different , e.g. 5.15.x, while freecad is built with platfrom default 5.11. User pip installed pyside2 has priorty over the system default v5.11.

Solution:

`sudo pip3 remove pyside2`

This solution also apply to any Linux platform if use has install another pyside2 via pip

This should solve the issue

https://github.com/FreeCAD/FreeCAD-addons/issues/183

• 2. Qt5 Crash inside WSL2

Although FreeCAD startup properly, now but can not create doc or load geometry

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Program received signal SIGSEGV, Segmentation fault.
#0  /lib/x86_64-linux-gnu/libc.so.6(+0x3efd0) [0x7fa0695e4fd0]
#1  /lib/x86_64-linux-gnu/libc.so.6(+0x18edc3) [0x7fa069734dc3]
#2  /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0(+0x3b9ac) [0x7fa05532a9ac]
#3  /usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0(+0x3bc75) [0x7fa05532ac75]

109  /usr/lib/x86_64-linux-gnu/libQt5WebKitWidgets.so.5(+0x2e749) [0x7f25deb10749]

110  0x7f2603747555 in QMetaObject::activate(QObject*, int, int, void**) from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5+0x865

111  0x7f25deb05645 in QWebPage::linkClicked(QUrl const&) from /usr/lib/x86_64-linux-gnu/libQt5WebKitWidgets.so.5+0x35

112  0x7f25deb05fa3 in QWebPage::acceptNavigationRequest(QWebFrame*, QNetworkRequest const&, QWebPage::NavigationType) from /usr/lib/x86_64-linux-gnu/libQt5WebKitWidgets.so.5+0x83

I suspect WSL2 has QtWebKitWidgets compatibility issue.


Alternative solution will be : do not use FreeCAD GUI, but import FreeCAD as module to do some job.

Examples are

https://github.com/qingfengxia/parallel ... FreeCAD.py

a Script to detect and import FreeCAD, hopefully it helps. it works for my in docker image.

Usage here

https://github.com/qingfengxia/parallel ... estBase.py

[kwahoo]

I suspect WSL2 has QtWebKitWidgets compatibility issue.

Maybe WSLg could be useful https://devblogs.microsoft.com/commandl ... r-linux-2/