[QGIS-Developer] When are we dropping support for Qt5?

[Nyall Dawson]

On Fri, 18 July 2025, 10:39 pm David Koňařík via QGIS-Developer, <
qgis-developer at lists.osgeo.org> wrote:

> Hi all,
> QGIS 4.0 is planned to be Qt6-only, but currently QGIS master still
> supports building with Qt5. I'd like to ask if there's a concrete plan for
> when to drop Qt5 support from the source code.
>
> When developing I keep running into cases where support for Qt5 requires
> extra code or keeps me from using some useful Qt6-only feature, so I'd like
> to know when I can start cleaning these things up.
>

In my opinion, these are prerequisites before we can drop qt5 from master:

- porting the Ubuntu ci infrastructure to qt6, including the database
server based tests
- porting the ogc server ci to qt6
- having some solution for the extremely slow sip build times on qt6

Nyall


> David Koňařík
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