rules.mak

   1
   2 # Don't use implicit rules or variables
   3 # we have explicit rules for everything
   4 MAKEFLAGS += -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
  15 QEMU_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
  20 ifeq ($(LIBTOOL),)
  21 %.lo: %.c
  22         @echo "missing libtool. please install and rerun configure"; exit 1
  23 else
  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 $@")
  26 endif
  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         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  33
  34 LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(sort $(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
  42 quiet-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
  47 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  48               >/dev/null 2>&1 && echo OK), $2, $3)
  49
  50 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh
  51 set-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.
  58 find-in-path = $(if $(find-string /, $1), \
  59         $(wildcard $1), \
  60         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  61
  62 # Generate files with tracetool
  63 TRACETOOL=$(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
  79 obj := .
  80 old-nested-dirs :=
  81
  82 define push-var
  83 $(eval save-$2-$1 = $(value $1))
  84 $(eval $1 :=)
  85 endef
  86
  87 define 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 :=)
  91 endef
  92
  93 define 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 -include $(wildcard $1/*.d))
  98 $(eval obj := $(patsubst %/$1,%,$(obj)))
  99 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 100 endef
 101
 102 define unnest-vars-1
 103 $(eval nested-dirs := $(filter-out \
 104     $(old-nested-dirs), \
 105     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 106 $(if $(nested-dirs),
 107   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 108   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 109   $(call unnest-vars-1))
 110 endef
 111
 112 define unnest-vars
 113 $(call unnest-vars-1)
 114 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 115 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 116 endef