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Since the introduction of CMake 4 in several distributions, build errors
started occurring on those distributions for cmake packages that
included calls to cmake_minimum_required() or cmake_policy() with a
version older than 3.50 (see [1]).
To avoid backporting numerous individual fixes for affected packages,
commit [2] was previously applied to the LTS branch as a workaround.
Following further discussion (see [2][3]), that raised concerns about
policy changes between CMake versions that could lead to breaking builds
in non-obvious ways, a different approach was chosen.
This patch reverts commit [2] and instead of applying a global
compatibility variable, we now enforce building host-cmake when the host
system provides CMake 4 or newer.
[1] https://cmake.org/cmake/help/latest/release/4.0.html#deprecated-and-removed-features
[2] 70aac2d9e8 package/pkg-cmake.mk: force config version >=3.5
[3] https://lists.buildroot.org/pipermail/buildroot/2025-May/780262.html
[4] https://lists.buildroot.org/pipermail/buildroot/2025-June/780372.html
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches