Pyside2: pip install vs. building from source

[Brent Villalobos]

We're building packages for the VFX2019 platform and I'm currently encountering issues with building pyside2-5.12.  As a more general question, how are you all consuming pyside2?  Is anyone building it from source or is everyone consuming the wheel files from pypi?

I followed the instructions on this page for building pyside2-5.12 from source:

https://wiki.qt.io/Qt_for_Python/GettingStarted/X11

Towards the end of the build, I run into this error:

**Skiping copy tree /usr/pic1/work/CM-14954/pyside/build/gcc-6.3/temp/pyside-setup/pyside2_install/py2.7-qt5.12.6-64bit-release/lib/python2.7/site-packages/pyside2uic to /usr/pic1/work/CM-14954/pyside/build/gcc-6.3/temp/pyside-setup/build/lib.linux-x86_64-2.7/pyside2uic. Source does not exists. filter=None. ignore=None.

The last time I built pyside2 from source (5.6), it built just fine.  I don't see any bug tickets about this so I think I'm doing something wrong.  Has anyone else encountered this build issue?  Should I even be attempting to build from source or is the recommended way of using pyside2 doing a pip install?

[Aloys Baillet]

Hi Brent,

I believe there's an issue when installing PySide in "parallel", there's a race condition somewhere in their cmake setup...
I've got a branch of the ASWF Docker that should be merged soon that builds Qt and PySide from source with the correct compilers on Linux: https://github.com/aloysbaillet/aswf-docker/blob/split-packages/scripts/base/build_pyside.sh

Cheers,

Aloys

[Brent Villalobos]

Thanks Aloys.  After looking at your build script, I tried building the source from the download tarball, not from the github repository clone as the instructions referenced.  That makes all the difference and the builds are successful now.

-Brent

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