ifdef CONFIG_UBSAN      CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=vla-bound)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=returns-nonnull-attribute)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool)      CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum) ifdef CONFIG_UBSAN_ALIGNMENT      CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)endif ifdef CONFIG_UBSAN_NULL      CFLAGS_UBSAN += $(call cc-option, -fsanitize=null)endif       # -fsanitize=* options makes GCC less smart than usual and      # increase number of 'maybe-uninitialized false-positives      CFLAGS_UBSAN += $(call cc-option, -Wno-maybe-uninitialized)endif