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 %.cpp:
  12 %.m:
  13 %.mak:
  14
  15 # Flags for C++ compilation
  16 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
  17
  18 # Flags for dependency generation
  19 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
  20
  21 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
  22 QEMU_INCLUDES += -I$(<D) -I$(@D)
  23
  24 %.o: %.c
  25         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
  26 %.o: %.rc
  27         $(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
  28
  29 ifeq ($(LIBTOOL),)
  30 LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  31        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
  32        $(LIBS),"  LINK  $(TARGET_DIR)$@")
  33 else
  34 LIBTOOL += $(if $(V),,--quiet)
  35 %.lo: %.c
  36         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
  37 %.lo: %.rc
  38         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
  39 %.lo: %.dtrace
  40         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
  41
  42 LINK = $(call quiet-command,\
  43        $(if $(filter %.lo %.la,$^),$(LIBTOOL) --mode=link --tag=CC \
  44        )$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  45        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) \
  46        $(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
  47        $(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
  48        $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  49 endif
  50
  51 %.asm: %.S
  52         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  53
  54 %.o: %.asm
  55         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  56
  57 %.o: %.cpp
  58         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  59
  60 %.o: %.m
  61         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  62
  63 %.o: %.dtrace
  64         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  65
  66 %$(EXESUF): %.o
  67         $(call LINK,$^)
  68
  69 %.a:
  70         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  71
  72 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  73
  74 # cc-option
  75 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  76
  77 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  78               >/dev/null 2>&1 && echo OK), $2, $3)
  79
  80 VPATH_SUFFIXES = %.c %.h %.S %.cpp %.m %.mak %.texi %.sh %.rc
  81 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
  82
  83 # find-in-path
  84 # Usage: $(call find-in-path, prog)
  85 # Looks in the PATH if the argument contains no slash, else only considers one
  86 # specific directory.  Returns an # empty string if the program doesn't exist
  87 # there.
  88 find-in-path = $(if $(find-string /, $1), \
  89         $(wildcard $1), \
  90         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  91
  92 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
  93 # Inputs to these must be either "y" (true) or "n" or "" (both false)
  94 # Output is always either "y" or "n".
  95 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
  96 # Logical NOT
  97 lnot = $(if $(subst n,,$1),n,y)
  98 # Logical AND
  99 land = $(if $(findstring yy,$1$2),y,n)
 100 # Logical OR
 101 lor = $(if $(findstring y,$1$2),y,n)
 102 # Logical XOR (note that this is the inverse of leqv)
 103 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 104 # Logical equivalence (note that leqv "","n" is true)
 105 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 106 # Logical if: like make's $(if) but with an leqv-like test
 107 lif = $(if $(subst n,,$1),$2,$3)
 108
 109 # String testing functions: inputs to these can be any string;
 110 # the output is always either "y" or "n". Leading and trailing whitespace
 111 # is ignored when comparing strings.
 112 # String equality
 113 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 114 # String inequality
 115 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 116 # Emptiness/non-emptiness tests:
 117 isempty = $(if $1,n,y)
 118 notempty = $(if $1,y,n)
 119
 120 # Generate files with tracetool
 121 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
 122
 123 # Generate timestamp files for .h include files
 124
 125 config-%.h: config-%.h-timestamp
 126         @cmp $< $@ >/dev/null 2>&1 || cp $< $@
 127
 128 config-%.h-timestamp: config-%.mak
 129         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
 130
 131 .PHONY: clean-timestamp
 132 clean-timestamp:
 133         rm -f *.timestamp
 134 clean: clean-timestamp
 135
 136 # will delete the target of a rule if commands exit with a nonzero exit status
 137 .DELETE_ON_ERROR:
 138
 139 # magic to descend into other directories
 140
 141 obj := .
 142 old-nested-dirs :=
 143
 144 define push-var
 145 $(eval save-$2-$1 = $(value $1))
 146 $(eval $1 :=)
 147 endef
 148
 149 define pop-var
 150 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
 151 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
 152 $(eval save-$2-$1 :=)
 153 endef
 154
 155 define unnest-dir
 156 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 157 $(eval obj := $(obj)/$1)
 158 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 159 $(eval obj := $(patsubst %/$1,%,$(obj)))
 160 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 161 endef
 162
 163 define unnest-vars-1
 164 $(eval nested-dirs := $(filter-out \
 165     $(old-nested-dirs), \
 166     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 167 $(if $(nested-dirs),
 168   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 169   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 170   $(call unnest-vars-1))
 171 endef
 172
 173 define unnest-vars
 174 $(call unnest-vars-1)
 175 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 176 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 177 $(foreach var,$(nested-vars), $(eval \
 178   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 179 endef