# 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: %.cc: %.cpp: %.m: %.mak: # Flags for C++ compilation QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS)) # Flags for dependency generation QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d # Same as -I$(SRC_PATH) -I., but for the nested source/object directories QEMU_INCLUDES += -I$(<D) -I$(@D) maybe-add = $(filter-out $1, $2) $1 extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)) \ $(foreach o,$(call expand-objs,$1),$($o-libs)))) expand-objs = $(strip $(sort $(filter %.o,$1)) \ $(foreach o,$(filter %.mo,$1),$($o-objs)) \ $(filter-out %.o %.mo,$1)) %.o: %.c $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@") %.o: %.rc $(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@") # If we have a CXX we might have some C++ objects, in which case we # must link with the C++ compiler, not the plain C compiler. LINKPROG = $(or $(CXX),$(CC)) ifeq ($(LIBTOOL),) LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ $(call expand-objs,$1) $(version-obj-y) \ $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@") else LIBTOOL += $(if $(V),,--quiet) %.lo: %.c $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," lt CC $@") %.lo: %.rc $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC $(TARGET_DIR)$@") %.lo: %.dtrace $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@") LINK = $(call quiet-command,\ $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \ )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \ $(call expand-objs,$1) \ $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \ $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \ $(call extract-libs,$1) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@") endif %.asm: %.S $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@") %.o: %.asm $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@") %.o: %.cc $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CXX $(TARGET_DIR)$@") %.o: %.cpp $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CXX $(TARGET_DIR)$@") %.o: %.m $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@") %.o: %.dtrace $(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@") DSO_CFLAGS := -fPIC -DBUILD_DSO %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED) %$(DSOSUF): %.mo libqemustub.a $(call LINK,$^) @# Copy to build root so modules can be loaded when program started without install $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)")) .PHONY: modules modules: %$(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 %.cc %.cpp %.m %.mak %.texi %.sh %.rc 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))))) # Logical functions (for operating on y/n values like CONFIG_FOO vars) # Inputs to these must be either "y" (true) or "n" or "" (both false) # Output is always either "y" or "n". # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR)) # Logical NOT lnot = $(if $(subst n,,$1),n,y) # Logical AND land = $(if $(findstring yy,$1$2),y,n) # Logical OR lor = $(if $(findstring y,$1$2),y,n) # Logical XOR (note that this is the inverse of leqv) lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y) # Logical equivalence (note that leqv "","n" is true) leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n) # Logical if: like make's $(if) but with an leqv-like test lif = $(if $(subst n,,$1),$2,$3) # String testing functions: inputs to these can be any string; # the output is always either "y" or "n". Leading and trailing whitespace # is ignored when comparing strings. # String equality eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y) # String inequality ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n) # Emptiness/non-emptiness tests: isempty = $(if $1,n,y) notempty = $(if $1,y,n) # Generate files with tracetool TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py # Generate timestamp files for .h include files config-%.h: config-%.h-timestamp @cmp $< $@ >/dev/null 2>&1 || cp $< $@ config-%.h-timestamp: config-%.mak $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h") .PHONY: clean-timestamp clean-timestamp: rm -f *.timestamp clean: clean-timestamp # will delete the target of a rule if commands exit with a nonzero exit status .DELETE_ON_ERROR: # magic to descend into other directories 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) $$(subdir-$2-$1)) $(eval save-$2-$1 :=) endef define fix-obj-vars $(foreach v,$($1), \ $(if $($v-cflags), \ $(eval $2$v-cflags := $($v-cflags)) \ $(eval $v-cflags := )) \ $(if $($v-libs), \ $(eval $2$v-libs := $($v-libs)) \ $(eval $v-libs := )) \ $(if $($v-objs), \ $(eval $2$v-objs := $(addprefix $2,$($v-objs))) \ $(eval $v-objs := ))) endef define unnest-dir $(foreach var,$(nested-vars),$(call push-var,$(var),$1/)) $(eval obj-parent-$1 := $(obj)) $(eval obj := $(if $(obj),$(obj)/$1,$1)) $(eval include $(SRC_PATH)/$1/Makefile.objs) $(foreach v,$(nested-vars),$(call fix-obj-vars,$v,$(if $(obj),$(obj)/))) $(eval obj := $(obj-parent-$1)) $(eval obj-parent-$1 := ) $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/)) endef define unnest-vars-1 $(eval nested-dirs := $(filter-out \ $(old-nested-dirs), \ $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var))))))) $(if $(nested-dirs), $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir)))) $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs)) $(call unnest-vars-1)) endef define process-modules $(foreach o,$(filter %.o,$($1)), $(eval $(patsubst %.o,%.mo,$o): $o) \ $(eval $(patsubst %.o,%.mo,$o)-objs := $o)) $(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \ $(eval $o-objs += module-common.o) $(eval $o: $($o-objs)) $(eval modules-objs-m += $($o-objs)) $(eval modules-m += $o) $(eval $o:; $$(call quiet-command,touch $$@," GEN $$(TARGET_DIR)$$@")) $(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \ $(eval modules-objs-m := $(sort $(modules-objs-m))) $(foreach o,$(modules-objs-m), \ $(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags))))) $(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1)) endef define unnest-vars $(eval obj := $1) $(eval nested-vars := $2) $(eval old-nested-dirs := ) $(call unnest-vars-1) $(if $1,$(foreach v,$(nested-vars),$(eval \ $v := $(addprefix $1/,$($v))))) $(foreach var,$(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))))))) $(foreach v,$(filter %-m,$(nested-vars)), \ $(call process-modules,$v)) endef