Strategy to deal with pyqtdeploy and C++/GCC11 issues within Qt5

[Phil Thompson]

On 05/04/2021 10:36, Frans Fürst wrote:
> I just realized that Qt5.15.3+ will not be available for download in
> the near future and now I wonder how to use pyqtdeploy with Qt5 and
> GCC11+. (is that correct? I see questions about PyQt5.15.3+ but
> Qt5.15.3 is not available here https://download.qt.io/archive/qt/5.15/
> )

Are you confusing PyQt and Qt version numbers?

> It looks like Qt5 is not ready for GCC11, see
> https://bugreports.qt.io/browse/QTBUG-90395
> 
> So on systems with GCC11 installed - and at least Fedora will be
> shipped with GCC11 at the end of this month) or if you want to compile
> with GCC11 for whatever reason you would have to patch Qt before
> compiling it.
> 
> Is there a way to do that with pyqtdeploy? The workflow I'm currently
> using is to download
> qt-everywhere-src-5.15.2.tar.xz, extract it, patch it, re-compress it
> and put it into ~/.pyqtdeploy/cache/ to be found by pyqtdeploy.
> 
> Is there a more straight forward way to do this?

The "recommended" way would be to sub-class the Qt component plugin and 
re-implement the unpack_archive() method to patch the unpacked archive.

> Other approaches I see (apart from not using Qt any more) are:
> * Download, compile and use GCC 10 instead of GCC 11 (pre-installed on
> Fedora 34+)
> * Use docker to virtualize the building process
> * Switch to PyQt6 (is pyqtdeploy ready for Qt6 yet?)

No.

Phil