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