Upgrade cmake to be higher than version 4

[yungyuc]

The cmake version we use is pretty old. We should upgrade to version 4 or newer.

$ ag cmake_minimum_required
CMakeLists.txt:4:cmake_minimum_required(VERSION 3.27)
cmake/FindNumPy.cmake:6:cmake_minimum_required(VERSION 3.9)
cpp/binary/pilot/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/binary/pymod_modmesh/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/mesh/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/multidim/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/linalg/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/inout/CMakeLists.txt:2:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/python/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/serialization/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/onedim/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/simd/CMakeLists.txt:27:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/math/CMakeLists.txt:1:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/toggle/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/testhelper/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/pilot/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/device/metal/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/universe/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/transform/CMakeLists.txt:1:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/spacetime/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
cpp/modmesh/buffer/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.16)
gtests/CMakeLists.txt:4:cmake_minimum_required(VERSION 3.24)

We need the GA runners to match our choice of version.

[tigercosmos]

What's the limitation of the current CMake 3.x?

[yungyuc]

What's the limitation of the current CMake 3.x?

I am not aware of a limitation. But as the tool has moved forward to version 4 for a while, I guess some limitation will surface at some point.

And we have moved forward with C++23. It seems to be a good point to upgrade other tools.

[tigercosmos]

I see. My only concern is that people will need to update their environment once we move on CMake4.

[yungyuc]

I see. My only concern is that people will need to update their environment once we move on CMake4.

That is my intention.

Version 4 was released this March (2025). The use of C++23 requires compiler released in 2024 if not 2025. We are asking contributors to upgrade the compilers already. It does not make a lot of difference to ask them upgrade other tools.

This issue is not of high priority though.

[ThreeMonth03]

@yungyuc Could I try to solve this issue? I'm learning cmake by the official tutorial in these days.

[yungyuc]

Sounds good @ThreeMonth03 . Go ahead.