Recent changes no longer allow modification of AFLAGS. The needed conversion was apparently missed in 2740d96efdd3 ("xen/build: have the root Makefile generates the CFLAGS").
Signed-off-by: Jan Beulich <jbeul...@suse.com> --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -68,7 +68,7 @@ extra-y += $(TARGET_SUBARCH)/head.o ifdef CONFIG_DTB_FILE obj-y += dtb.o -AFLAGS += -DCONFIG_DTB_FILE=\"$(CONFIG_DTB_FILE)\" +AFLAGS-y += -DCONFIG_DTB_FILE=\"$(CONFIG_DTB_FILE)\" endif ALL_OBJS := $(TARGET_SUBARCH)/head.o $(ALL_OBJS)