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) \
  39        $(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
  40        $(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
  41        $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  42 endif
  43
  44 %.asm: %.S
  45         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  46
  47 %.o: %.asm
  48         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  49
  50 %.o: %.m
  51         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  52
  53 %.o: %.dtrace
  54         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  55
  56 %$(EXESUF): %.o
  57         $(call LINK,$^)
  58
  59 %.a:
  60         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  61
  62 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  63
  64 # cc-option
  65 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  66
  67 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  68               >/dev/null 2>&1 && echo OK), $2, $3)
  69
  70 VPATH_SUFFIXES = %.c %.h %.S %.m %.mak %.texi %.sh
  71 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
  72
  73 # find-in-path
  74 # Usage: $(call find-in-path, prog)
  75 # Looks in the PATH if the argument contains no slash, else only considers one
  76 # specific directory.  Returns an # empty string if the program doesn't exist
  77 # there.
  78 find-in-path = $(if $(find-string /, $1), \
  79         $(wildcard $1), \
  80         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  81
  82 # Generate files with tracetool
  83 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
  84
  85 # Generate timestamp files for .h include files
  86
  87 config-%.h: config-%.h-timestamp
  88         @cmp $< $@ >/dev/null 2>&1 || cp $< $@
  89
  90 config-%.h-timestamp: config-%.mak
  91         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
  92
  93 .PHONY: clean-timestamp
  94 clean-timestamp:
  95         rm -f *.timestamp
  96 clean: clean-timestamp
  97
  98 # will delete the target of a rule if commands exit with a nonzero exit status
  99 .DELETE_ON_ERROR:
 100
 101 # magic to descend into other directories
 102
 103 obj := .
 104 old-nested-dirs :=
 105
 106 define push-var
 107 $(eval save-$2-$1 = $(value $1))
 108 $(eval $1 :=)
 109 endef
 110
 111 define pop-var
 112 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
 113 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
 114 $(eval save-$2-$1 :=)
 115 endef
 116
 117 define unnest-dir
 118 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 119 $(eval obj := $(obj)/$1)
 120 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 121 $(eval obj := $(patsubst %/$1,%,$(obj)))
 122 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 123 endef
 124
 125 define unnest-vars-1
 126 $(eval nested-dirs := $(filter-out \
 127     $(old-nested-dirs), \
 128     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 129 $(if $(nested-dirs),
 130   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 131   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 132   $(call unnest-vars-1))
 133 endef
 134
 135 define unnest-vars
 136 $(call unnest-vars-1)
 137 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 138 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 139 $(foreach var,$(nested-vars), $(eval \
 140   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 141 endef