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When grub2 (i386-pc) is built with -O2 or -O3 it is unable to boot
and the system will reboot in a loop.
Tony Battersby has bisected [0] the error down to this security bugfix:
boot/grub2/0132-kern-parser-Fix-a-stack-buffer-overflow.patch
There is also a bug report by Peter Seiderer about this [1].
As discussed on the mailing list [2], this patch introduces a workaround
in the grub2.mk overriding the global optimization settings with -Os
which results in a booting system.
References:
[0] https://savannah.gnu.org/bugs/?60458
[1] https://bugs.busybox.net/show_bug.cgi?id=13586
[2] http://lists.busybox.net/pipermail/buildroot/2021-May/311524.html
Signed-off-by: Andreas Hilse <andreas.hilse@googlemail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 7cb51d4843)
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