[QGIS-Developer] Minimal version of supported Qt6 version in QGIS 3.99

[Nyall Dawson]

On Tue, 28 Oct 2025 at 22:36, DelazJ via QGIS-Developer
<qgis-developer at lists.osgeo.org> wrote:
>
> Hi devs,
> The INSTALL.md instructions [0] in code repo mentions Qt 5.15.2 as minimal version of supported Qt. With the move to Qt6-only in QGIS 4, do you know what would be the minimal supported version, please?

Officially it's 6.4 (see
https://github.com/qgis/QGIS/blob/master/CMakeLists.txt#L578), but
there'd be a ton of bugs in that version. I wouldn't suggest building
with anything older than 6.9.

Nyall

>
> Thanks,
> Harrissou
>
> [0] https://github.com/qgis/QGIS/blob/master/INSTALL.md#2-overview
> _______________________________________________
> QGIS-Developer mailing list
> QGIS-Developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer