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Though -nostdlib is passed in PURGATORY_LDFLAGS and -ffreestanding in KBUILD_CFLAGS_DECOMPRESSOR, -fno-stack-protector must also be passed to avoid linking errors related to undefined references to '__stack_chk_guard' and '__stack_chk_fail' if toolchain enforces -fstack-protector. Fixes - https://gitlab.com/kubu93/buildroot/-/jobs/1247043361 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com> Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com> Link: https://lore.kernel.org/r/20210510053133.1220167-1-fontaine.fabrice@gmail.com Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>