[ Please ignore this email if it is already reported ] While building Linux next 20211215 arm64 defconfig with gcc-8 following warnings / errors noticed. and gcc-9, gcc-10 and gcc-11 builds pass. make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/current \ ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \ CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- \ 'CC=sccache aarch64-linux-gnu-gcc' \ 'HOSTCC=sccache gcc' /builds/linux/arch/arm64/kernel/efi-rt-wrapper.S: Assembler messages: /builds/linux/arch/arm64/kernel/efi-rt-wrapper.S:8: Error: unknown mnemonic `bti' -- `bti c' make[3]: *** [/builds/linux/scripts/Makefile.build:411: arch/arm64/kernel/efi-rt-wrapper.o] Error 1 meta data: ----------- git describe: next-20211215 git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git_sha: 93bf6eee76c0e716f6b32de690b1c52991547bb4 git_short_log: 93bf6eee76c0 (\"Add linux-next specific files for 20211215\") target_arch: arm64 toolchain: gcc-8 steps to reproduce: # To install tuxmake on your system globally: # sudo pip3 install -U tuxmake tuxmake --runtime podman --target-arch arm64 --toolchain gcc-8 --kconfig defconfig Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> build log: https://builds.tuxbuild.com/22LCvXNzzZHquxsEYJUxEGe1kHW/ -- Linaro LKFT https://lkft.linaro.org