Starting from 5.13 Cyclades async mux support is dropped from linux kernel: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f76edd8f7ce06cdff2fe5b6b39a49644c684a161 But gcc's libsanitizer uses <linux/cyclades.h> header. This issue is fixed by: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=745dae5923aba02982563481d75a21595df22ff8 gcc 9.4.0 has already been released with the fix, so we only patch gcc 8.x, 10.x, 11.x, the ARC and C-SKY versions Fixes: http://autobuild.buildroot.net/results/7f2056d05f4e05fcb95e2606583e95fac8bf3aef/ (gcc 10.x) http://autobuild.buildroot.net/results/116f40c22946952a8190ccba85d26913d9786e52/ (gcc 11.x) Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>