Bump cmake requirements (for `1.4.x`)

(cherry picked from commit e412149b)

We have a recent cmake in Arch Linux now that fails with the old minimum version.

changed title from Bump cmake requirements to Bump cmake requirements{+ (for 1.4.x)+}

added Community contribution label

approved this merge request

@eworm-de Approving because 3.12 is already everywhere, but can you elaborate on the issue ? We only ask for minimal versions, so all policy-related matters should only be warnings, might be worth reporting to cmake if it's a cmake bug

enabled automatic add to merge train when checks pass

The documentation says:

Changed in version 4.0: Compatibility with versions of CMake older than 3.5 is removed. Calls to cmake_minimum_required(VERSION) or cmake_policy(VERSION) that do not specify at least 3.5 as their policy version (optionally via ...) will produce an error in CMake 4.0 and above.

https://cmake.org/cmake/help/latest/command/cmake_minimum_required.html#policy-version

So it's not a bug, but expected.

I see, thanks

started a merge train

merged