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 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
  18 QEMU_CFLAGS += -I$(<D) -I$(@D)
  19
  20 %.o: %.c
  21         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
  22
  23 ifeq ($(LIBTOOL),)
  24 %.lo: %.c
  25         @echo "missing libtool. please install and rerun configure"; exit 1
  26 else
  27 LIBTOOL += $(if $(V),,--quiet)
  28 %.lo: %.c
  29         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
  30 endif
  31
  32 %.asm: %.S
  33         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  34
  35 %.o: %.asm
  36         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  37
  38 %.o: %.m
  39         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  40
  41 LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(LIBS),"  LINK  $(TARGET_DIR)$@")
  42
  43 %$(EXESUF): %.o
  44         $(call LINK,$^)
  45
  46 %.a:
  47         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  48
  49 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  50
  51 # cc-option
  52 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  53
  54 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  55               >/dev/null 2>&1 && echo OK), $2, $3)
  56
  57 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh
  58 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
  59
  60 # find-in-path
  61 # Usage: $(call find-in-path, prog)
  62 # Looks in the PATH if the argument contains no slash, else only considers one
  63 # specific directory.  Returns an # empty string if the program doesn't exist
  64 # there.
  65 find-in-path = $(if $(find-string /, $1), \
  66         $(wildcard $1), \
  67         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  68
  69 # Generate files with tracetool
  70 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
  71
  72 # Generate timestamp files for .h include files
  73
  74 %.h: %.h-timestamp
  75         @test -f $@ || cp $< $@
  76
  77 %.h-timestamp: %.mak
  78         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)$*.h")
  79         @cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h
  80
  81 # will delete the target of a rule if commands exit with a nonzero exit status
  82 .DELETE_ON_ERROR:
  83
  84 # magic to descend into other directories
  85
  86 obj := .
  87 old-nested-dirs :=
  88
  89 define push-var
  90 $(eval save-$2-$1 = $(value $1))
  91 $(eval $1 :=)
  92 endef
  93
  94 define pop-var
  95 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
  96 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
  97 $(eval save-$2-$1 :=)
  98 endef
  99
 100 define unnest-dir
 101 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 102 $(eval obj := $(obj)/$1)
 103 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 104 $(eval obj := $(patsubst %/$1,%,$(obj)))
 105 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 106 endef
 107
 108 define unnest-vars-1
 109 $(eval nested-dirs := $(filter-out \
 110     $(old-nested-dirs), \
 111     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 112 $(if $(nested-dirs),
 113   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 114   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 115   $(call unnest-vars-1))
 116 endef
 117
 118 define unnest-vars
 119 $(call unnest-vars-1)
 120 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 121 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 122 $(foreach var,$(nested-vars), $(eval \
 123   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 124 endef