The linux-next commit "arm64: Silence gcc warnings about arch ABI drift" [1] breaks clang build where it screams that unknown option "-Wno-psabi" and generates errors below, [1] https://lore.kernel.org/linux-arm-kernel/1559817223-32585-1-git-send-email-D ave.Martin@xxxxxxx/ ./drivers/firmware/efi/libstub/arm-stub.stub.o: In function `install_memreserve_table': ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to `__efistub___stack_chk_guard' ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to `__efistub___stack_chk_guard' ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to `__efistub___stack_chk_guard' ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to `__efistub___stack_chk_guard' ./linux/drivers/firmware/efi/libstub/arm-stub.c:94: undefined reference to `__efistub___stack_chk_fail
