[Development] Proposal to raise the minimum CMake version needed to build and use Qt 6.12

[Alexandru Croitor]

Hi again,

> On 4. May 2026, at 14:28, Alexandru Croitor via Development <development at qt-project.org> wrote:
> 
> Hi,
> 
> I'd like to propose raising the minimum required CMake version for building and using Qt 6.12 to CMake 3.25.

Given there was no negative feedback about the proposal, and even further proposals to make the minimum even higher, I'll take that as a 'go ahead' for 3.25.

I wish we could have increased it further, but there are some TQtC requirements that prevent that. So a higher version will have to wait for another cycle.

I'll go ahead with merging https://codereview.qt-project.org/c/qt/qt5/+/733509 to bump the minimum in the CI.

Followed by https://codereview.qt-project.org/c/qt/qtbase/+/733428 to error out at configure time when using an older version, to make it official.