hostprogs-y := modpost mk_elfconfig always := $(hostprogs-y) empty.o modpost-objs := modpost.o file2alias.o sumversion.o # dependencies on generated files need to be listed explicitly $(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h quiet_cmd_elfconfig = MKELF $@ cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@ $(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE $(call if_changed,elfconfig) targets += elfconfig.h