# 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
