[Development] Proposal to raise the minimum CMake version needed to build and use Qt 6.9

[Alexandru Croitor]

Hi,

> On 13. Nov 2024, at 18:09, Thiago Macieira <thiago.macieira at intel.com> wrote:
> 
> But is there any chance of lowering the requirement to 3.25 instead?

It was brought to my attention that we might be limited by Qt's (or Qt Company's) support for Yocto 4.0 (kirkstone) LTS which ships CMake 3.22.

Until it is clarified whether that is really the case, the max we could bump to is 3.22.

I don't think 3.22 is controversial, and is a big improvement already over 3.16, so I will prepare changes for bumping to 3.22.

In case we can go higher, I will prepare a follow up change for a higher version, after we get a consensus what that could be.

The likely candidates would be 3.24, 3.25, 3.26.

You can see the useful features from my PoV for each of those versions at 

https://bugreports.qt.io/browse/QTBUG-131169?focusedId=841296&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-841296

Cheers.