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 LIBTOOL = /bin/false
  25 LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  26        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
  27        $(LIBS),"  LINK  $(TARGET_DIR)$@")
  28 else
  29 LIBTOOL += $(if $(V),,--quiet)
  30 %.lo: %.c
  31         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
  32 %.lo: %.dtrace
  33         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
  34
  35 LINK = $(call quiet-command,\
  36        $(if $(filter %.lo %.la,$^),$(LIBTOOL) --mode=link --tag=CC \
  37        )$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  38        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
  39        $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  40 endif
  41
  42 %.asm: %.S
  43         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  44
  45 %.o: %.asm
  46         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  47
  48 %.o: %.m
  49         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  50
  51 %.o: %.dtrace
  52         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  53
  54 %$(EXESUF): %.o
  55         $(call LINK,$^)
  56
  57 %.a:
  58         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  59
  60 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  61
  62 # cc-option
  63 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  64
  65 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  66               >/dev/null 2>&1 && echo OK), $2, $3)
  67
  68 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh
  69 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
  70
  71 # find-in-path
  72 # Usage: $(call find-in-path, prog)
  73 # Looks in the PATH if the argument contains no slash, else only considers one
  74 # specific directory.  Returns an # empty string if the program doesn't exist
  75 # there.
  76 find-in-path = $(if $(find-string /, $1), \
  77         $(wildcard $1), \
  78         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  79
  80 # Generate files with tracetool
  81 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
  82
  83 # Generate timestamp files for .h include files
  84
  85 %.h: %.h-timestamp
  86         @test -f $@ || cp $< $@
  87
  88 %.h-timestamp: %.mak
  89         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)$*.h")
  90         @cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h
  91
  92 # will delete the target of a rule if commands exit with a nonzero exit status
  93 .DELETE_ON_ERROR:
  94
  95 # magic to descend into other directories
  96
  97 obj := .
  98 old-nested-dirs :=
  99
 100 define push-var
 101 $(eval save-$2-$1 = $(value $1))
 102 $(eval $1 :=)
 103 endef
 104
 105 define pop-var
 106 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
 107 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
 108 $(eval save-$2-$1 :=)
 109 endef
 110
 111 define unnest-dir
 112 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 113 $(eval obj := $(obj)/$1)
 114 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 115 $(eval obj := $(patsubst %/$1,%,$(obj)))
 116 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 117 endef
 118
 119 define unnest-vars-1
 120 $(eval nested-dirs := $(filter-out \
 121     $(old-nested-dirs), \
 122     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 123 $(if $(nested-dirs),
 124   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 125   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 126   $(call unnest-vars-1))
 127 endef
 128
 129 define unnest-vars
 130 $(call unnest-vars-1)
 131 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 132 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 133 $(foreach var,$(nested-vars), $(eval \
 134   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 135 endef