1 2# Don't use implicit rules or variables 3# we have explicit rules for everything 4MAKEFLAGS += -rR 5 6# Files with this suffixes are final, don't try to generate them 7# using implicit rules 8%.d: 9%.h: 10%.c: 11%.m: 12%.mak: 13 14# Flags for dependency generation 15QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d 16 17%.o: %.c 18 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CC $(TARGET_DIR)$@") 19 20ifeq ($(LIBTOOL),) 21%.lo: %.c 22 @echo "missing libtool. please install and rerun configure"; exit 1 23else 24%.lo: %.c 25 $(call quiet-command,$(LIBTOOL) --mode=compile --quiet --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," lt CC $@") 26endif 27 28%.o: %.S 29 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," AS $(TARGET_DIR)$@") 30 31%.o: %.m 32 $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@") 33 34LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(LIBS)," LINK $(TARGET_DIR)$@") 35 36%$(EXESUF): %.o 37 $(call LINK,$^) 38 39%.a: 40 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@") 41 42quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1)) 43 44# cc-option 45# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0) 46 47cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \ 48 >/dev/null 2>&1 && echo OK), $2, $3) 49 50VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh 51set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1))) 52 53# find-in-path 54# Usage: $(call find-in-path, prog) 55# Looks in the PATH if the argument contains no slash, else only considers one 56# specific directory. Returns an # empty string if the program doesn't exist 57# there. 58find-in-path = $(if $(find-string /, $1), \ 59 $(wildcard $1), \ 60 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH))))) 61 62# Generate files with tracetool 63TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py 64 65# Generate timestamp files for .h include files 66 67%.h: %.h-timestamp 68 @test -f $@ || cp $< $@ 69 70%.h-timestamp: %.mak 71 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $*.h") 72 @cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h 73 74# will delete the target of a rule if commands exit with a nonzero exit status 75.DELETE_ON_ERROR: 76 77# magic to descend into other directories 78 79obj := . 80old-nested-dirs := 81 82define push-var 83$(eval save-$2-$1 = $(value $1)) 84$(eval $1 :=) 85endef 86 87define pop-var 88$(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1)))) 89$(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1)) 90$(eval save-$2-$1 :=) 91endef 92 93define unnest-dir 94$(foreach var,$(nested-vars),$(call push-var,$(var),$1/)) 95$(eval obj := $(obj)/$1) 96$(eval include $(SRC_PATH)/$1/Makefile.objs) 97$(eval obj := $(patsubst %/$1,%,$(obj))) 98$(foreach var,$(nested-vars),$(call pop-var,$(var),$1/)) 99endef 100 101define unnest-vars-1 102$(eval nested-dirs := $(filter-out \ 103 $(old-nested-dirs), \ 104 $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var))))))) 105$(if $(nested-dirs), 106 $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir)))) 107 $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs)) 108 $(call unnest-vars-1)) 109endef 110 111define unnest-vars 112$(call unnest-vars-1) 113$(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var))))) 114$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var)))))) 115$(foreach var,$(nested-vars), $(eval \ 116 -include $(addsuffix *.d, $(sort $(dir $($(var))))))) 117endef 118