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With bump of package/e2fsprogs to 1.47.0 [1] a freshly generated ext4 fs has unfortunately different default features enabled (e.g. metadata_csum_seed). This and some other newer fs features (e.g. large_dir) are however not supported by our grub2. Thus, newly generated ext-based rootfs won't be recognized by grub2 and are therefore not bootable/usable from grub2 anymore. This is an issue already known to other Linux derivates [2],[3],[4]. This commit introduces two additional upstream patches to package/grub2 which adds EXT4_FEATURE_INCOMPAT_CSUM_SEED and EXT4_FEATURE_INCOMPAT_LARGEDIR to the EXT2_DRIVER_IGNORED_INCOMPAT list of ignored incompatible ext features, allowing grub2 to use ext filesystems with these newer default feature sets. [1] https://git.buildroot.net/buildroot/commit/?id=6a21733f839478d902f3eab287a82b456e55f708 [2] https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1844012 [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031325 [4] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1030939 Signed-off-by: Jens Maus <mail@jens-maus.de> Signed-off-by: Peter Korsgaard <peter@korsgaard.com> (cherry picked from commit 9c25f1b51eeb988449ad0f1f524283ef5361ee4d) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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