# Don't use implicit rules or variables # we have explicit rules for everything MAKEFLAGS += -rR # Files with this suffixes are final, don't try to generate them # using implicit rules %.d: %.h: %.c: %.m: %.mak: # Flags for dependency generation QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d # Same as -I$(SRC_PATH) -I., but for the nested source/object directories QEMU_CFLAGS += -I$(<D) -I$(@D) %.o: %.c $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CC $(TARGET_DIR)$@") ifeq ($(LIBTOOL),) %.lo: %.c @echo "missing libtool. please install and rerun configure"; exit 1 else %.lo: %.c $(call quiet-command,$(LIBTOOL) --mode=compile --quiet --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," lt CC $@") endif %.o: %.S $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," AS $(TARGET_DIR)$@") %.o: %.m $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@") LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(LIBS)," LINK $(TARGET_DIR)$@") %$(EXESUF): %.o $(call LINK,$^) %.a: $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@") quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1)) # cc-option # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0) cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \ >/dev/null 2>&1 && echo OK), $2, $3) VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1))) # find-in-path # Usage: $(call find-in-path, prog) # Looks in the PATH if the argument contains no slash, else only considers one # specific directory. Returns an # empty string if the program doesn't exist # there. find-in-path = $(if $(find-string /, $1), \ $(wildcard $1), \ $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH))))) # Generate files with tracetool TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py # Generate timestamp files for .h include files %.h: %.h-timestamp @test -f $@ || cp $< $@ %.h-timestamp: %.mak $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)$*.h") @cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h # will delete the target of a rule if commands exit with a nonzero exit status .DELETE_ON_ERROR: # magic to descend into other directories obj := . old-nested-dirs := define push-var $(eval save-$2-$1 = $(value $1)) $(eval $1 :=) endef define pop-var $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1)))) $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1)) $(eval save-$2-$1 :=) endef define unnest-dir $(foreach var,$(nested-vars),$(call push-var,$(var),$1/)) $(eval obj := $(obj)/$1) $(eval include $(SRC_PATH)/$1/Makefile.objs) $(eval obj := $(patsubst %/$1,%,$(obj))) $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/)) endef define unnest-vars-1 $(eval nested-dirs := $(filter-out \ $(old-nested-dirs), \ $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var))))))) $(if $(nested-dirs), $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir)))) $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs)) $(call unnest-vars-1)) endef define unnest-vars $(call unnest-vars-1) $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var))))) $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var)))))) $(foreach var,$(nested-vars), $(eval \ -include $(addsuffix *.d, $(sort $(dir $($(var))))))) endef