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

[DelazJ]

Hi,
Thanks Nyall for the information (and the pointer).
If QGIS seems unusable with the minimal supported Qt version, should we not
raise that min value?
I see that Debian, Ubuntu (and their derivatives?) latest versions come
with Qt 6.8 LTS. QGIS users may encounter bugs due to their specific
version or do you think the risk is highly mitigated?

Harrissou

Le 29 octobre 2025 22:15:13 GMT+01:00, Nyall Dawson <nyall.dawson at gmail.com>
a écrit :

> 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
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