Hi, Currently, we require CMake 3.16 or later: https://github.com/apache/arrow/blob/e0f8c5e8e6f8b328a997f7e21bc6fd1a01b3b3fd/cpp/CMakeLists.txt#L18
> cmake_minimum_required(VERSION 3.16) We want to bump required CMake version to use newer features. We can improve our CMake configurations with them: https://github.com/apache/arrow/issues/44950 What version should we require? Here are CMake versions on supported Linux platforms: * Ubuntu 20.04 (CMake 3.16) will reach EOL on 2025-04: https://wiki.ubuntu.com/Releases * CentOS 7 (CMake 3.17) reached EOL: We're still supporting CentOS 7[1] but we don't need to care about CentOS 7 for this. We can install newer CMake manually. [1] https://github.com/apache/arrow/pull/41395#issuecomment-2116223200 * Debian GNU/Linux bullseye (CMake 3.18) reached EOL on 2024-08-14: https://wiki.debian.org/DebianReleases * Debian GNU/Linux bookworm provides CMake 3.25: https://packages.debian.org/search?keywords=cmake * Ubuntu 22.04 provides CMake 3.22: https://packages.ubuntu.com/search?keywords=cmake * AlmaLinux 8 provides CMake 3.26 * AlmaLinux 9 provides CMake 3.26 (Multi-platform packaging systems such ad Homebrew, vcpkg, conda and so on provide newer CMake. So we don't need to care about them.) There are some proposals: * We require CMake 3.25 or later because there are some useful features in CMake 3.25. Ubuntu 22.04 users must install newer CMake manually. * We require CMake 3.22 or later. All supported Linux platforms can use system CMake. If you have any opinion, concern and so on, please share it. Thanks, -- kou
