LXR qemu/rules.mak

   1
   2COMMA := ,
   3
   4# Don't use implicit rules or variables
   5# we have explicit rules for everything
   6MAKEFLAGS += -rR
   7
   8# Files with this suffixes are final, don't try to generate them
   9# using implicit rules
  10%/trace-events:
  11%.hx:
  12%.py:
  13%.objs:
  14%.d:
  15%.h:
  16%.c:
  17%.cc:
  18%.cpp:
  19%.m:
  20%.mak:
  21clean-target:
  22
  23# Flags for dependency generation
  24QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
  25
  26# Compiler searches the source file dir first, but in vpath builds
  27# we need to make it search the build dir too, before any other
  28# explicit search paths. There are two search locations in the build
  29# dir, one absolute and the other relative to the compiler working
  30# directory. These are the same for target-independent files, but
  31# different for target-dependent ones.
  32QEMU_LOCAL_INCLUDES = -I$(BUILD_DIR)/$(@D) -I$(@D)
  33
  34WL_U := -Wl,-u,
  35find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
  36defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
  37undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
  38
  39# All the .mo objects in -m variables are also added into corresponding -y
  40# variable in unnest-vars, but filtered out here, when LINK is called.
  41#
  42# The .mo objects are supposed to be linked as a DSO, for module build. So here
  43# they are only used as a placeholders to generate those "archive undefined"
  44# symbol options (-Wl,-u,$symbol_name), which are the archive functions
  45# referenced by the code in the DSO.
  46#
  47# Also the presence in -y variables will also guarantee they are built before
  48# linking executables that will load them. So we can look up symbol reference
  49# in LINK.
  50#
  51# This is necessary because the exectuable itself may not use the function, in
  52# which case the function would not be linked in. Then the DSO loading will
  53# fail because of the missing symbol.
  54process-archive-undefs = $(filter-out %.a %.mo,$1) \
  55                $(addprefix $(WL_U), \
  56                     $(filter $(call defined-symbols,$(filter %.a, $1)), \
  57                              $(call undefined-symbols,$(filter %.mo,$1)))) \
  58                $(filter %.a,$1)
  59
  60extract-libs = $(strip $(foreach o,$(filter-out %.mo,$1),$($o-libs)))
  61expand-objs = $(strip $(sort $(filter %.o,$1)) \
  62                  $(foreach o,$(filter %.mo,$1),$($o-objs)) \
  63                  $(filter-out %.o %.mo,$1))
  64
  65%.o: %.c
  66        $(call quiet-command,$(CC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  67               $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  68               -c -o $@ $<,"CC","$(TARGET_DIR)$@")
  69%.o: %.rc
  70        $(call quiet-command,$(WINDRES) -I. -o $@ $<,"RC","$(TARGET_DIR)$@")
  71
  72# If we have a CXX we might have some C++ objects, in which case we
  73# must link with the C++ compiler, not the plain C compiler.
  74LINKPROG = $(or $(CXX),$(CC))
  75
  76LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
  77       $(call process-archive-undefs, $1) \
  78       $(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")
  79
  80%.o: %.S
  81        $(call quiet-command,$(CCAS) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  82               $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
  83               -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
  84
  85%.o: %.cc
  86        $(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  87               $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  88               -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
  89
  90%.o: %.cpp
  91        $(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  92               $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  93               -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
  94
  95%.o: %.m
  96        $(call quiet-command,$(OBJCC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
  97               $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
  98               -c -o $@ $<,"OBJC","$(TARGET_DIR)$@")
  99
 100%.o: %.dtrace
 101        $(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")
 102
 103DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
 104module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
 105%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
 106%$(DSOSUF): %.mo
 107        $(call LINK,$^)
 108        @# Copy to build root so modules can be loaded when program started without install
 109        $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@),"CP","$(subst /,-,$@)"))
 110
 111
 112LD_REL := $(CC) -nostdlib $(LD_REL_FLAGS)
 113
 114%.mo:
 115        $(call quiet-command,$(LD_REL) -o $@ $^,"LD","$(TARGET_DIR)$@")
 116
 117.PHONY: modules
 118modules:
 119
 120%$(EXESUF): %.o
 121        $(call LINK,$(filter %.o %.a %.mo, $^))
 122
 123%.a:
 124        $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")
 125
 126# Usage: $(call quiet-command,command and args,"NAME","args to print")
 127# This will run "command and args", and either:
 128#  if V=1 just print the whole command and args
 129#  otherwise print the 'quiet' output in the format "  NAME     args to print"
 130# NAME should be a short name of the command, 7 letters or fewer.
 131# If called with only a single argument, will print nothing in quiet mode.
 132quiet-command = $(if $(V),$1,$(if $(2),@printf "  %-7s %s\n" $2 $3 && $1, @$1))
 133
 134# cc-option
 135# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
 136
 137cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
 138              >/dev/null 2>&1 && echo OK), $2, $3)
 139cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
 140                >/dev/null 2>&1 && echo OK), $2, $3)
 141
 142VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
 143set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
 144
 145# install-prog list, dir
 146define install-prog
 147        $(INSTALL_DIR) "$2"
 148        $(INSTALL_PROG) $1 "$2"
 149        $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
 150endef
 151
 152# find-in-path
 153# Usage: $(call find-in-path, prog)
 154# Looks in the PATH if the argument contains no slash, else only considers one
 155# specific directory.  Returns an # empty string if the program doesn't exist
 156# there.
 157find-in-path = $(if $(findstring /, $1), \
 158        $(wildcard $1), \
 159        $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
 160
 161# Logical functions (for operating on y/n values like CONFIG_FOO vars)
 162# Inputs to these must be either "y" (true) or "n" or "" (both false)
 163# Output is always either "y" or "n".
 164# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
 165# Logical NOT
 166lnot = $(if $(subst n,,$1),n,y)
 167# Logical AND
 168land = $(if $(findstring yy,$1$2),y,n)
 169# Logical OR
 170lor = $(if $(findstring y,$1$2),y,n)
 171# Logical XOR (note that this is the inverse of leqv)
 172lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
 173# Logical equivalence (note that leqv "","n" is true)
 174leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
 175# Logical if: like make's $(if) but with an leqv-like test
 176lif = $(if $(subst n,,$1),$2,$3)
 177
 178# String testing functions: inputs to these can be any string;
 179# the output is always either "y" or "n". Leading and trailing whitespace
 180# is ignored when comparing strings.
 181# String equality
 182eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
 183# String inequality
 184ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
 185# Emptiness/non-emptiness tests:
 186isempty = $(if $1,n,y)
 187notempty = $(if $1,y,n)
 188
 189# Generate files with tracetool
 190TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
 191
 192# Generate timestamp files for .h include files
 193
 194config-%.h: config-%.h-timestamp
 195        @cmp $< $@ >/dev/null 2>&1 || cp $< $@
 196
 197config-%.h-timestamp: config-%.mak $(SRC_PATH)/scripts/create_config
 198        $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@,"GEN","$(TARGET_DIR)config-$*.h")
 199
 200.PHONY: clean-timestamp
 201clean-timestamp:
 202        rm -f *.timestamp
 203clean: clean-timestamp
 204
 205# will delete the target of a rule if commands exit with a nonzero exit status
 206.DELETE_ON_ERROR:
 207
 208# save-vars
 209# Usage: $(call save-vars, vars)
 210# Save each variable $v in $vars as save-vars-$v, save their object's
 211# variables, then clear $v.  saved-vars-$v contains the variables that
 212# where saved for the objects, in order to speedup load-vars.
 213define save-vars
 214    $(foreach v,$1,
 215        $(eval save-vars-$v := $(value $v))
 216        $(eval saved-vars-$v := $(foreach o,$($v), \
 217            $(if $($o-cflags), $o-cflags $(eval save-vars-$o-cflags := $($o-cflags))$(eval $o-cflags := )) \
 218            $(if $($o-libs), $o-libs $(eval save-vars-$o-libs := $($o-libs))$(eval $o-libs := )) \
 219            $(if $($o-objs), $o-objs $(eval save-vars-$o-objs := $($o-objs))$(eval $o-objs := ))))
 220        $(eval $v := ))
 221endef
 222
 223# load-vars
 224# Usage: $(call load-vars, vars, add_var)
 225# Load the saved value for each variable in @vars, and the per object
 226# variables.
 227# Append @add_var's current value to the loaded value.
 228define load-vars
 229    $(eval $2-new-value := $(value $2))
 230    $(foreach v,$1,
 231        $(eval $v := $(value save-vars-$v))
 232        $(foreach o,$(saved-vars-$v),
 233            $(eval $o := $(save-vars-$o)) $(eval save-vars-$o := ))
 234        $(eval save-vars-$v := )
 235        $(eval saved-vars-$v := ))
 236    $(eval $2 := $(value $2) $($2-new-value))
 237endef
 238
 239# fix-paths
 240# Usage: $(call fix-paths, obj_path, src_path, vars)
 241# Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
 242# directories in @vars.
 243define fix-paths
 244    $(foreach v,$3,
 245        $(foreach o,$($v),
 246            $(if $($o-libs),
 247                $(eval $1$o-libs := $($o-libs)))
 248            $(if $($o-cflags),
 249                $(eval $1$o-cflags := $($o-cflags)))
 250            $(if $($o-objs),
 251                $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
 252        $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
 253                     $(addprefix $2,$(filter %/,$($v)))))
 254endef
 255
 256# unnest-var-recursive
 257# Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
 258#
 259# Unnest @var by including subdir Makefile.objs, while protect others in @vars
 260# unchanged.
 261#
 262# @obj_prefix is the starting point of object path prefix.
 263#
 264define unnest-var-recursive
 265    $(eval dirs := $(sort $(filter %/,$($3))))
 266    $(eval $3 := $(filter-out %/,$($3)))
 267    $(foreach d,$(dirs:%/=%),
 268            $(call save-vars,$2)
 269            $(eval obj := $(if $1,$1/)$d)
 270            $(eval -include $(SRC_PATH)/$d/Makefile.objs)
 271            $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
 272            $(call load-vars,$2,$3)
 273            $(call unnest-var-recursive,$1,$2,$3))
 274endef
 275
 276# unnest-vars
 277# Usage: $(call unnest-vars, obj_prefix, vars)
 278#
 279# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
 280# ending '/'.
 281#
 282# @vars: the list of variable names to unnest.
 283#
 284# This macro will scan subdirectories's Makefile.objs, include them, to build
 285# up each variable listed in @vars.
 286#
 287# Per object and per module cflags and libs are saved with relative path fixed
 288# as well, those variables include -libs, -cflags and -objs. Items in -objs are
 289# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
 290#
 291# All nested variables postfixed by -m in names are treated as DSO variables,
 292# and will be built as modules, if enabled.
 293#
 294# A simple example of the unnest:
 295#
 296#     obj_prefix = ..
 297#     vars = hot cold
 298#     hot  = fire.o sun.o season/
 299#     cold = snow.o water/ season/
 300#
 301# Unnest through a faked source directory structure:
 302#
 303#     SRC_PATH
 304#        ├── water
 305#        │   └── Makefile.objs──────────────────┐
 306#        │       │ hot += steam.o               │
 307#        │       │ cold += ice.mo               │
 308#        │       │ ice.mo-libs := -licemaker    │
 309#        │       │ ice.mo-objs := ice1.o ice2.o │
 310#        │       └──────────────────────────────┘
 311#        │
 312#        └── season
 313#            └── Makefile.objs──────┐
 314#                │ hot += summer.o  │
 315#                │ cold += winter.o │
 316#                └──────────────────┘
 317#
 318# In the end, the result will be:
 319#
 320#     hot  = ../fire.o ../sun.o ../season/summer.o
 321#     cold = ../snow.o ../water/ice.mo ../season/winter.o
 322#     ../water/ice.mo-libs = -licemaker
 323#     ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
 324#
 325# Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
 326# included.
 327#
 328define unnest-vars
 329    # In the case of target build (i.e. $1 == ..), fix path for top level
 330    # Makefile.objs objects
 331    $(if $1,$(call fix-paths,$1/,,$2))
 332
 333    # Descend and include every subdir Makefile.objs
 334    $(foreach v, $2,
 335        $(call unnest-var-recursive,$1,$2,$v)
 336        # Pass the .mo-cflags and .mo-libs along to its member objects
 337        $(foreach o, $(filter %.mo,$($v)),
 338            $(foreach p,$($o-objs),
 339                $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
 340                $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
 341
 342    # For all %.mo objects that are directly added into -y, just expand them
 343    $(foreach v,$(filter %-y,$2),
 344        $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
 345
 346    $(foreach v,$(filter %-m,$2),
 347        # All .o found in *-m variables are single object modules, create .mo
 348        # for them
 349        $(foreach o,$(filter %.o,$($v)),
 350            $(eval $(o:%.o=%.mo)-objs := $o))
 351        # Now unify .o in -m variable to .mo
 352        $(eval $v := $($v:%.o=%.mo))
 353        $(eval modules-m += $($v))
 354
 355        # For module build, build shared libraries during "make modules"
 356        # For non-module build, add -m to -y
 357        $(if $(CONFIG_MODULES),
 358             $(foreach o,$($v),
 359                   $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
 360                   $(eval $o: $($o-objs)))
 361             $(eval $(patsubst %-m,%-y,$v) += $($v))
 362             $(eval modules: $($v:%.mo=%$(DSOSUF))),
 363             $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
 364
 365    # Post-process all the unnested vars
 366    $(foreach v,$2,
 367        $(foreach o, $(filter %.mo,$($v)),
 368            # Find all the .mo objects in variables and add dependency rules
 369            # according to .mo-objs. Report error if not set
 370            $(if $($o-objs),
 371                $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
 372                $(error $o added in $v but $o-objs is not set)))
 373        $(shell mkdir -p ./ $(sort $(dir $($v))))
 374        # Include all the .d files
 375        $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$($v))))
 376        $(eval $v := $(filter-out %/,$($v))))
 377endef
 378
 379TEXI2MAN = $(call quiet-command, \
 380        perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $(TEXI2PODFLAGS) $< $@.pod && \
 381        $(POD2MAN) --section=$(subst .,,$(suffix $@)) --center=" " --release=" " $@.pod > $@, \
 382        "GEN","$@")
 383
 384%.1:
 385        $(call TEXI2MAN)
 386%.7:
 387        $(call TEXI2MAN)
 388%.8:
 389        $(call TEXI2MAN)
 390