Bug#964127: plplot: Please switch from sip4 to sip5

[Dmitry Shachnev]

Hi Rafael!

On Mon, Nov 30, 2020 at 09:32:06AM +0100, Rafael Laboissière wrote:
> The following succeeds:
>
>  cd <build_dir>/obj-x86_64-linux-gnu/bindings/qt_gui/pyqt5 &&
> /usr/bin/sip5 -c . -I/usr/lib/python3/dist-packages/PyQt5/bindings
> -n PyQt5.sip -t Qt_5_14_0 -t WS_X11
> <build_dir>/bindings/qt_gui/pyqt5/plplot_pyqt5.sip

Please note that upstream is going to remove the sip5 script in SIP v6, which
will be released in a few months:

https://www.riverbankcomputing.com/static/Docs/sip/legacy_command_line_tools.html

So it would be better to switch to the completely new build system that was
introduced in SIP v5:

https://www.riverbankcomputing.com/static/Docs/sip/examples.html

Here are two examples of projects that I converted to the new build system:

https://github.com/frescobaldi/python-poppler-qt5/pull/41
https://github.com/GauiStori/PyQt-Qwt/pull/14

> I only changed “-t Qt_5_15_0” to “-t Qt_5_14_0”.  It looks like there is
> something hardcoding my build above to Qt version 5.14.

Can you check what the module-tags are in
/usr/lib/python3/dist-packages/PyQt5/bindings/QtCore/QtCore.toml?

If it says 5.14, make sure you have the latest pyqt5-dev package installed.

--
Dmitry Shachnev