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 %.cc:
  12 %.cpp:
  13 %.m:
  14 %.mak:
  15
  16 # Flags for C++ compilation
  17 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
  18
  19 # Flags for dependency generation
  20 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
  21
  22 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
  23 QEMU_INCLUDES += -I$(<D) -I$(@D)
  24
  25 %.o: %.c
  26         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
  27 %.o: %.rc
  28         $(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
  29
  30 # If we have a CXX we might have some C++ objects, in which case we
  31 # must link with the C++ compiler, not the plain C compiler.
  32 LINKPROG = $(or $(CXX),$(CC))
  33
  34 ifeq ($(LIBTOOL),)
  35 LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  36        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
  37        $(LIBS),"  LINK  $(TARGET_DIR)$@")
  38 else
  39 LIBTOOL += $(if $(V),,--quiet)
  40 %.lo: %.c
  41         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
  42 %.lo: %.rc
  43         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
  44 %.lo: %.dtrace
  45         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
  46
  47 LINK = $(call quiet-command,\
  48        $(if $(filter %.lo %.la,$^),$(LIBTOOL) --mode=link --tag=CC \
  49        )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  50        $(sort $(filter %.o, $1)) $(filter-out %.o, $1) \
  51        $(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
  52        $(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
  53        $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  54 endif
  55
  56 %.asm: %.S
  57         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  58
  59 %.o: %.asm
  60         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  61
  62 %.o: %.cc
  63         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  64
  65 %.o: %.cpp
  66         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  67
  68 %.o: %.m
  69         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  70
  71 %.o: %.dtrace
  72         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  73
  74 %$(EXESUF): %.o
  75         $(call LINK,$^)
  76
  77 %.a:
  78         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  79
  80 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  81
  82 # cc-option
  83 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  84
  85 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  86               >/dev/null 2>&1 && echo OK), $2, $3)
  87
  88 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
  89 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
  90
  91 # find-in-path
  92 # Usage: $(call find-in-path, prog)
  93 # Looks in the PATH if the argument contains no slash, else only considers one
  94 # specific directory.  Returns an # empty string if the program doesn't exist
  95 # there.
  96 find-in-path = $(if $(find-string /, $1), \
  97         $(wildcard $1), \
  98         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
  99
 100 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
 101 # Inputs to these must be either "y" (true) or "n" or "" (both false)
 102 # Output is always either "y" or "n".
 103 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
 104 # Logical NOT
 105 lnot = $(if $(subst n,,$1),n,y)
 106 # Logical AND
 107 land = $(if $(findstring yy,$1$2),y,n)
 108 # Logical OR
 109 lor = $(if $(findstring y,$1$2),y,n)
 110 # Logical XOR (note that this is the inverse of leqv)
 111 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 112 # Logical equivalence (note that leqv "","n" is true)
 113 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 114 # Logical if: like make's $(if) but with an leqv-like test
 115 lif = $(if $(subst n,,$1),$2,$3)
 116
 117 # String testing functions: inputs to these can be any string;
 118 # the output is always either "y" or "n". Leading and trailing whitespace
 119 # is ignored when comparing strings.
 120 # String equality
 121 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 122 # String inequality
 123 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 124 # Emptiness/non-emptiness tests:
 125 isempty = $(if $1,n,y)
 126 notempty = $(if $1,y,n)
 127
 128 # Generate files with tracetool
 129 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
 130
 131 # Generate timestamp files for .h include files
 132
 133 config-%.h: config-%.h-timestamp
 134         @cmp $< $@ >/dev/null 2>&1 || cp $< $@
 135
 136 config-%.h-timestamp: config-%.mak
 137         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
 138
 139 .PHONY: clean-timestamp
 140 clean-timestamp:
 141         rm -f *.timestamp
 142 clean: clean-timestamp
 143
 144 # will delete the target of a rule if commands exit with a nonzero exit status
 145 .DELETE_ON_ERROR:
 146
 147 # magic to descend into other directories
 148
 149 obj := .
 150 old-nested-dirs :=
 151
 152 define push-var
 153 $(eval save-$2-$1 = $(value $1))
 154 $(eval $1 :=)
 155 endef
 156
 157 define pop-var
 158 $(eval subdir-$2-$1 := $(if $(filter $2,$(save-$2-$1)),$(addprefix $2,$($1))))
 159 $(eval $1 = $(value save-$2-$1) $$(subdir-$2-$1))
 160 $(eval save-$2-$1 :=)
 161 endef
 162
 163 define unnest-dir
 164 $(foreach var,$(nested-vars),$(call push-var,$(var),$1/))
 165 $(eval obj := $(obj)/$1)
 166 $(eval include $(SRC_PATH)/$1/Makefile.objs)
 167 $(eval obj := $(patsubst %/$1,%,$(obj)))
 168 $(foreach var,$(nested-vars),$(call pop-var,$(var),$1/))
 169 endef
 170
 171 define unnest-vars-1
 172 $(eval nested-dirs := $(filter-out \
 173     $(old-nested-dirs), \
 174     $(sort $(foreach var,$(nested-vars), $(filter %/, $($(var)))))))
 175 $(if $(nested-dirs),
 176   $(foreach dir,$(nested-dirs),$(call unnest-dir,$(patsubst %/,%,$(dir))))
 177   $(eval old-nested-dirs := $(old-nested-dirs) $(nested-dirs))
 178   $(call unnest-vars-1))
 179 endef
 180
 181 define unnest-vars
 182 $(call unnest-vars-1)
 183 $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
 184 $(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
 185 $(foreach var,$(nested-vars), $(eval \
 186   -include $(addsuffix *.d, $(sort $(dir $($(var)))))))
 187 endef