[Pkg-cmake-team] Bug#1098837: cmake 4.0

[Andrea Pappacoda]

Source: cmake
Version: 3.31.5-2
Severity: wishlist

Hi!

Do you think it'd be feasable to package CMake 4.0 for trixie?

Despite its scary-looking name, it doesn't seem to be that big of 
a release, and doesn't break much. The main change, as far as I can 
tell, is the removal of compatibility with a CMake Policy version older 
than 3.5 (i.e., projects declaring `cmake_minimum_required(VERSION 3.0)` 
will no longer build).

While this might sound scary, CMake 4.0 also introduced a variable named 
`CMAKE_POLICY_VERSION_MINIMUM`, which can override the 
`cmake_minimum_required` call of built projects.

In other words, upgrading to CMake 4.0 will require Debian to either:

1. Patch all CMake-based projects to call at least 
   `cmake_minimum_required(VERSION 3.5)`, or
2. Patch debhelper to pass `-DCMAKE_POLICY_VERSION_MINIMUM=3.5` when 
   building.

Either way, there's a possibility that some projects will not build with 
the above fix. Still, I find it quite unlikely.

Let me know! Bye :)
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