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Without systemd package/docker-engine requires another way to mount /sys/fs/cgroup, so far provided by BR2_PACKAGE_CGROUPFS_MOUNT for cgroup v1. Replace this with BR2_PACKAGE_CGROUPFS_V2_MOUNT for cgroup v2 support. 5.2 is the minimum recommended version for cgroup v2 support according to the Docker documentation: "v4.15 or later (v5.2 or later is recommended)" [1]. Depending on the selected container runtime users may need to adjust kernel configurations to enable options required by that runtime with cgroup v2 (e.g. CONFIG_CGROUP_BPF for runc). Propagate dependencies accordingly: The Docker btrfs filesystem driver does not need a separate and lower minimum headers version, package/mender-update-modules needs to apply the new "depends on". [1] https://docs.docker.com/engine/containers/runmetrics/#running-docker-on-cgroup-v2 Signed-off-by: Fiona Klute (WIWA) <fiona.klute@gmx.de> Signed-off-by: Romain Naour <romain.naour@smile.fr>
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