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 extract-libs = $(strip $(foreach o,$1,$($o-libs)))
  26 expand-objs = $(strip $(sort $(filter %.o,$1)) \
  27                   $(foreach o,$(filter %.mo,$1),$($o-objs)) \
  28                   $(filter-out %.o %.mo,$1))
  29
  30 %.o: %.c
  31         $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
  32 %.o: %.rc
  33         $(call quiet-command,$(WINDRES) -I. -o $@ $<,"  RC    $(TARGET_DIR)$@")
  34
  35 # If we have a CXX we might have some C++ objects, in which case we
  36 # must link with the C++ compiler, not the plain C compiler.
  37 LINKPROG = $(or $(CXX),$(CC))
  38
  39 ifeq ($(LIBTOOL),)
  40 LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  41        $1 $(version-obj-y) $(call extract-libs,$1) $(LIBS),"  LINK  $(TARGET_DIR)$@")
  42 else
  43 LIBTOOL += $(if $(V),,--quiet)
  44 %.lo: %.c
  45         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($*.o-cflags) -c -o $@ $<,"  lt CC $@")
  46 %.lo: %.rc
  47         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC   $(TARGET_DIR)$@")
  48 %.lo: %.dtrace
  49         $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
  50
  51 LINK = $(call quiet-command,\
  52        $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
  53        )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $1 \
  54        $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
  55        $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
  56        $(call extract-libs,$(1:.lo=.o)) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", "  LINK  ")"$(TARGET_DIR)$@")
  57 endif
  58
  59 %.asm: %.S
  60         $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<,"  CPP   $(TARGET_DIR)$@")
  61
  62 %.o: %.asm
  63         $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<,"  AS    $(TARGET_DIR)$@")
  64
  65 %.o: %.cc
  66         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  67
  68 %.o: %.cpp
  69         $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  CXX   $(TARGET_DIR)$@")
  70
  71 %.o: %.m
  72         $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"  OBJC  $(TARGET_DIR)$@")
  73
  74 %.o: %.dtrace
  75         $(call quiet-command,dtrace -o $@ -G -s $<, "  GEN   $(TARGET_DIR)$@")
  76
  77 %$(DSOSUF): CFLAGS += -fPIC -DBUILD_DSO
  78 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
  79 %$(DSOSUF):
  80         $(call LINK,$^)
  81         @# Copy to build root so modules can be loaded when program started without install
  82         $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), "  CP    $(subst /,-,$@)"))
  83
  84 .PHONY: modules
  85 modules:
  86
  87 %$(EXESUF): %.o
  88         $(call LINK,$^)
  89
  90 %.a:
  91         $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"  AR    $(TARGET_DIR)$@")
  92
  93 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
  94
  95 # cc-option
  96 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
  97
  98 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
  99               >/dev/null 2>&1 && echo OK), $2, $3)
 100
 101 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
 102 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 103
 104 # install-prog list, dir
 105 define install-prog
 106         $(INSTALL_DIR) "$2"
 107         $(INSTALL_PROG) $1 "$2"
 108         $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
 109 endef
 110
 111 # find-in-path
 112 # Usage: $(call find-in-path, prog)
 113 # Looks in the PATH if the argument contains no slash, else only considers one
 114 # specific directory.  Returns an # empty string if the program doesn't exist
 115 # there.
 116 find-in-path = $(if $(find-string /, $1), \
 117         $(wildcard $1), \
 118         $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
 119
 120 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
 121 # Inputs to these must be either "y" (true) or "n" or "" (both false)
 122 # Output is always either "y" or "n".
 123 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
 124 # Logical NOT
 125 lnot = $(if $(subst n,,$1),n,y)
 126 # Logical AND
 127 land = $(if $(findstring yy,$1$2),y,n)
 128 # Logical OR
 129 lor = $(if $(findstring y,$1$2),y,n)
 130 # Logical XOR (note that this is the inverse of leqv)
 131 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 132 # Logical equivalence (note that leqv "","n" is true)
 133 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 134 # Logical if: like make's $(if) but with an leqv-like test
 135 lif = $(if $(subst n,,$1),$2,$3)
 136
 137 # String testing functions: inputs to these can be any string;
 138 # the output is always either "y" or "n". Leading and trailing whitespace
 139 # is ignored when comparing strings.
 140 # String equality
 141 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 142 # String inequality
 143 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 144 # Emptiness/non-emptiness tests:
 145 isempty = $(if $1,n,y)
 146 notempty = $(if $1,y,n)
 147
 148 # Generate files with tracetool
 149 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
 150
 151 # Generate timestamp files for .h include files
 152
 153 config-%.h: config-%.h-timestamp
 154         @cmp $< $@ >/dev/null 2>&1 || cp $< $@
 155
 156 config-%.h-timestamp: config-%.mak
 157         $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, "  GEN   $(TARGET_DIR)config-$*.h")
 158
 159 .PHONY: clean-timestamp
 160 clean-timestamp:
 161         rm -f *.timestamp
 162 clean: clean-timestamp
 163
 164 # will delete the target of a rule if commands exit with a nonzero exit status
 165 .DELETE_ON_ERROR:
 166
 167 # save-vars
 168 # Usage: $(call save-vars, vars)
 169 # Save each variable $v in $vars as save-vars-$v, save their object's
 170 # variables, then clear $v.
 171 define save-vars
 172     $(foreach v,$1,
 173         $(eval save-vars-$v := $(value $v))
 174         $(foreach o,$($v),
 175             $(foreach k,cflags libs objs,
 176                 $(if $($o-$k),
 177                     $(eval save-vars-$o-$k := $($o-$k))
 178                     $(eval $o-$k := ))))
 179         $(eval $v := ))
 180 endef
 181
 182 # load-vars
 183 # Usage: $(call load-vars, vars, add_var)
 184 # Load the saved value for each variable in @vars, and the per object
 185 # variables.
 186 # Append @add_var's current value to the loaded value.
 187 define load-vars
 188     $(eval $2-new-value := $(value $2))
 189     $(foreach v,$1,
 190         $(eval $v := $(value save-vars-$v))
 191         $(foreach o,$($v),
 192             $(foreach k,cflags libs objs,
 193                 $(if $(save-vars-$o-$k),
 194                     $(eval $o-$k := $(save-vars-$o-$k))
 195                     $(eval save-vars-$o-$k := ))))
 196         $(eval save-vars-$v := ))
 197     $(eval $2 := $(value $2) $($2-new-value))
 198 endef
 199
 200 # fix-paths
 201 # Usage: $(call fix-paths, obj_path, src_path, vars)
 202 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
 203 # directories in @vars.
 204 define fix-paths
 205     $(foreach v,$3,
 206         $(foreach o,$($v),
 207             $(if $($o-libs),
 208                 $(eval $1$o-libs := $($o-libs)))
 209             $(if $($o-cflags),
 210                 $(eval $1$o-cflags := $($o-cflags)))
 211             $(if $($o-objs),
 212                 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
 213         $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
 214                      $(addprefix $2,$(filter %/,$($v)))))
 215 endef
 216
 217 # unnest-var-recursive
 218 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
 219 #
 220 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
 221 # unchanged.
 222 #
 223 # @obj_prefix is the starting point of object path prefix.
 224 #
 225 define unnest-var-recursive
 226     $(eval dirs := $(sort $(filter %/,$($3))))
 227     $(eval $3 := $(filter-out %/,$($3)))
 228     $(foreach d,$(dirs:%/=%),
 229             $(call save-vars,$2)
 230             $(eval obj := $(if $1,$1/)$d)
 231             $(eval -include $(SRC_PATH)/$d/Makefile.objs)
 232             $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
 233             $(call load-vars,$2,$3)
 234             $(call unnest-var-recursive,$1,$2,$3))
 235 endef
 236
 237 # unnest-vars
 238 # Usage: $(call unnest-vars, obj_prefix, vars)
 239 #
 240 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
 241 # ending '/'.
 242 #
 243 # @vars: the list of variable names to unnest.
 244 #
 245 # This macro will scan subdirectories's Makefile.objs, include them, to build
 246 # up each variable listed in @vars.
 247 #
 248 # Per object and per module cflags and libs are saved with relative path fixed
 249 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
 250 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
 251 #
 252 # All nested variables postfixed by -m in names are treated as DSO variables,
 253 # and will be built as modules, if enabled.
 254 #
 255 # A simple example of the unnest:
 256 #
 257 #     obj_prefix = ..
 258 #     vars = hot cold
 259 #     hot  = fire.o sun.o season/
 260 #     cold = snow.o water/ season/
 261 #
 262 # Unnest through a faked source directory structure:
 263 #
 264 #     SRC_PATH
 265 #        ├── water
 266 #        │   └── Makefile.objs──────────────────┐
 267 #        │       │ hot += steam.o               │
 268 #        │       │ cold += ice.mo               │
 269 #        │       │ ice.mo-libs := -licemaker    │
 270 #        │       │ ice.mo-objs := ice1.o ice2.o │
 271 #        │       └──────────────────────────────┘
 272 #        │
 273 #        └── season
 274 #            └── Makefile.objs──────┐
 275 #                │ hot += summer.o  │
 276 #                │ cold += winter.o │
 277 #                └──────────────────┘
 278 #
 279 # In the end, the result will be:
 280 #
 281 #     hot  = ../fire.o ../sun.o ../season/summer.o
 282 #     cold = ../snow.o ../water/ice.mo ../season/winter.o
 283 #     ../water/ice.mo-libs = -licemaker
 284 #     ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
 285 #
 286 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
 287 # included.
 288 #
 289 define unnest-vars
 290     # In the case of target build (i.e. $1 == ..), fix path for top level
 291     # Makefile.objs objects
 292     $(if $1,$(call fix-paths,$1/,,$2))
 293
 294     # Descend and include every subdir Makefile.objs
 295     $(foreach v, $2, $(call unnest-var-recursive,$1,$2,$v))
 296
 297     $(foreach v,$(filter %-m,$2),
 298         # All .o found in *-m variables are single object modules, create .mo
 299         # for them
 300         $(foreach o,$(filter %.o,$($v)),
 301             $(eval $(o:%.o=%.mo)-objs := $o))
 302         # Now unify .o in -m variable to .mo
 303         $(eval $v := $($v:%.o=%.mo))
 304         $(eval modules-m += $($v))
 305
 306         # For module build, build shared libraries during "make modules"
 307         # For non-module build, add -m to -y
 308         $(if $(CONFIG_MODULES),
 309              $(eval modules: $($v:%.mo=%$(DSOSUF))),
 310              $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
 311
 312     # Post-process all the unnested vars
 313     $(foreach v,$2,
 314         $(foreach o, $(filter %.mo,$($v)),
 315             # Find all the .mo objects in variables and add dependency rules
 316             # according to .mo-objs. Report error if not set
 317             $(if $($o-objs),
 318                 $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
 319                 $(error $o added in $v but $o-objs is not set))
 320             # Pass the .mo-cflags and .mo-libs along to member objects
 321             $(foreach p,$($o-objs),
 322                 $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
 323                 $(if $($o-libs), $(eval $p-libs += $($o-libs)))))
 324         $(shell mkdir -p ./ $(sort $(dir $($v))))
 325         # Include all the .d files
 326         $(eval -include $(addsuffix *.d, $(sort $(dir $($v)))))
 327         $(eval $v := $(filter-out %/,$($v))))
 328 endef