[qemu.git] / rules.mak


# These are used when we want to do substitutions without confusing Make
NULL  :=
SPACE := $(NULL) #
COMMA := ,

# Don't use implicit rules or variables
# we have explicit rules for everything
MAKEFLAGS += -rR

# Files with this suffixes are final, don't try to generate them
# using implicit rules
%/trace-events:
%.hx:
%.py:
%.objs:
%.d:
%.h:
%.c:
%.cc:
%.cpp:
%.m:
%.mak:
clean-target:

# Flags for dependency generation
QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d

# Compiler searches the source file dir first, but in vpath builds
# we need to make it search the build dir too, before any other
# explicit search paths. There are two search locations in the build
# dir, one absolute and the other relative to the compiler working
# directory. These are the same for target-independent files, but
# different for target-dependent ones.
QEMU_LOCAL_INCLUDES = -iquote $(BUILD_DIR) -iquote $(BUILD_DIR)/$(@D) -iquote $(@D)

WL_U := -Wl,-u,
find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')

WL := -Wl,
ifdef CONFIG_DARWIN
whole-archive = $(WL)-force_load,$1
else
whole-archive = $(WL)--whole-archive $1 $(WL)--no-whole-archive
endif

# All the .mo objects in -m variables are also added into corresponding -y
# variable in unnest-vars, but filtered out here, when LINK is called.
#
# The .mo objects are supposed to be linked as a DSO, for module build. So here
# they are only used as a placeholders to generate those "archive undefined"
# symbol options (-Wl,-u,$symbol_name), which are the archive functions
# referenced by the code in the DSO.
#
# Also the presence in -y variables will also guarantee they are built before
# linking executables that will load them. So we can look up symbol reference
# in LINK.
#
# This is necessary because the exectuable itself may not use the function, in
# which case the function would not be linked in. Then the DSO loading will
# fail because of the missing symbol.
process-archive-undefs = $(filter-out %.a %.fa %.mo,$1) \
                $(addprefix $(WL_U), \
                     $(filter $(call defined-symbols,$(filter %.a %.fa, $1)), \
                              $(call undefined-symbols,$(filter %.mo,$1)))) \
		$(foreach l,$(filter %.fa,$1),$(call whole-archive,$l)) \
		$(filter %.a,$1)

extract-libs = $(strip $(foreach o,$(filter-out %.mo,$1),$($o-libs)))
expand-objs = $(strip $(sort $(filter %.o,$1)) \
                  $(foreach o,$(filter %.mo,$1),$($o-objs)) \
                  $(filter-out %.o %.mo,$1))

%.o: %.c
	@mkdir -p $(dir $@)
	$(call quiet-command,$(CC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	       $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
	       -c -o $@ $<,"CC","$(TARGET_DIR)$@")
%.o: %.rc
	$(call quiet-command,$(WINDRES) -I. -o $@ $<,"RC","$(TARGET_DIR)$@")

# If we have a CXX we might have some C++ objects, in which case we
# must link with the C++ compiler, not the plain C compiler.
LINKPROG = $(or $(CXX),$(CC))

LINK = $(call quiet-command, $(LINKPROG) $(CFLAGS) $(QEMU_LDFLAGS) -o $@ \
       $(call process-archive-undefs, $1) \
       $(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")

%.o: %.S
	$(call quiet-command,$(CCAS) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	       $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
	       -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")

%.o: %.cc
	$(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	       $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
	       -c -o $@ $<,"CXX","$(TARGET_DIR)$@")

%.o: %.cpp
	$(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	       $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
	       -c -o $@ $<,"CXX","$(TARGET_DIR)$@")

%.o: %.m
	$(call quiet-command,$(OBJCC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	       $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
	       -c -o $@ $<,"OBJC","$(TARGET_DIR)$@")

%.o: %.dtrace
	$(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")

DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
%$(DSOSUF): QEMU_LDFLAGS += $(LDFLAGS_SHARED)
%$(DSOSUF): %.mo
	$(call LINK,$^)
	@# Copy to build root so modules can be loaded when program started without install
	$(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@),"CP","$(subst /,-,$@)"))


LD_REL := $(CC) -nostdlib $(LD_REL_FLAGS)

%.mo:
	$(call quiet-command,$(LD_REL) -o $@ $^,"LD","$(TARGET_DIR)$@")

.PHONY: modules
modules:

%$(EXESUF): %.o
	$(call LINK,$(filter %.o %.a %.mo %.fa, $^))

%.a:
	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")

# Usage: $(call quiet-command,command and args,"NAME","args to print")
# This will run "command and args", and either:
#  if V=1 just print the whole command and args
#  otherwise print the 'quiet' output in the format "  NAME     args to print"
# NAME should be a short name of the command, 7 letters or fewer.
# If called with only a single argument, will print nothing in quiet mode.
quiet-command-run = $(if $(V),,$(if $2,printf "  %-7s %s\n" $2 $3 && ))$1
quiet-@ = $(if $(V),,@)
quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)

# cc-option
# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)

cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
              >/dev/null 2>&1 && echo OK), $2, $3)
cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
                >/dev/null 2>&1 && echo OK), $2, $3)

VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc Kconfig% %.json.in
set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))

# install-prog list, dir
define install-prog
	$(INSTALL_DIR) "$2"
	$(INSTALL_PROG) $1 "$2"
	$(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
endef

# find-in-path
# Usage: $(call find-in-path, prog)
# Looks in the PATH if the argument contains no slash, else only considers one
# specific directory.  Returns an # empty string if the program doesn't exist
# there.
find-in-path = $(if $(findstring /, $1), \
        $(wildcard $1), \
        $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))

# Logical functions (for operating on y/n values like CONFIG_FOO vars)
# Inputs to these must be either "y" (true) or "n" or "" (both false)
# Output is always either "y" or "n".
# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
# Logical NOT
lnot = $(if $(subst n,,$1),n,y)
# Logical AND
land = $(if $(findstring yy,$1$2),y,n)
# Logical OR
lor = $(if $(findstring y,$1$2),y,n)
# Logical XOR (note that this is the inverse of leqv)
lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
# Logical equivalence (note that leqv "","n" is true)
leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
# Logical if: like make's $(if) but with an leqv-like test
lif = $(if $(subst n,,$1),$2,$3)

# String testing functions: inputs to these can be any string;
# the output is always either "y" or "n". Leading and trailing whitespace
# is ignored when comparing strings.
# String equality
eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
# String inequality
ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
# Emptiness/non-emptiness tests:
isempty = $(if $1,n,y)
notempty = $(if $1,y,n)

# Generate files with tracetool
TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py

.PHONY: clean-timestamp
clean-timestamp:
	rm -f *.timestamp
clean: clean-timestamp

# will delete the target of a rule if commands exit with a nonzero exit status
.DELETE_ON_ERROR:

# save-vars
# Usage: $(call save-vars, vars)
# Save each variable $v in $vars as save-vars-$v, save their object's
# variables, then clear $v.  saved-vars-$v contains the variables that
# where saved for the objects, in order to speedup load-vars.
define save-vars
    $(foreach v,$1,
        $(eval save-vars-$v := $(value $v))
        $(eval saved-vars-$v := $(foreach o,$($v), \
            $(if $($o-cflags), $o-cflags $(eval save-vars-$o-cflags := $($o-cflags))$(eval $o-cflags := )) \
            $(if $($o-libs), $o-libs $(eval save-vars-$o-libs := $($o-libs))$(eval $o-libs := )) \
            $(if $($o-objs), $o-objs $(eval save-vars-$o-objs := $($o-objs))$(eval $o-objs := ))))
        $(eval $v := ))
endef

# load-vars
# Usage: $(call load-vars, vars, add_var)
# Load the saved value for each variable in @vars, and the per object
# variables.
# Append @add_var's current value to the loaded value.
define load-vars
    $(eval $2-new-value := $(value $2))
    $(foreach v,$1,
        $(eval $v := $(value save-vars-$v))
        $(foreach o,$(saved-vars-$v),
            $(eval $o := $(save-vars-$o)) $(eval save-vars-$o := ))
        $(eval save-vars-$v := )
        $(eval saved-vars-$v := ))
    $(eval $2 := $(value $2) $($2-new-value))
endef

# fix-paths
# Usage: $(call fix-paths, obj_path, src_path, vars)
# Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
# directories in @vars.
define fix-paths
    $(foreach v,$3,
        $(foreach o,$($v),
            $(if $($o-libs),
                $(eval $1$o-libs := $($o-libs)))
            $(if $($o-cflags),
                $(eval $1$o-cflags := $($o-cflags)))
            $(if $($o-objs),
                $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
        $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
                     $(addprefix $2,$(filter %/,$($v)))))
endef

# unnest-var-recursive
# Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
#
# Unnest @var by including subdir Makefile.objs, while protect others in @vars
# unchanged.
#
# @obj_prefix is the starting point of object path prefix.
#
define unnest-var-recursive
    $(eval dirs := $(sort $(filter %/,$($3))))
    $(eval $3 := $(filter-out %/,$($3)))
    $(foreach d,$(dirs:%/=%),
            $(call save-vars,$2)
            $(eval obj := $(if $1,$1/)$d)
            $(eval -include $(SRC_PATH)/$d/Makefile.objs)
            $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
            $(call load-vars,$2,$3)
            $(call unnest-var-recursive,$1,$2,$3))
endef

# unnest-vars
# Usage: $(call unnest-vars, obj_prefix, vars)
#
# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
# ending '/'.
#
# @vars: the list of variable names to unnest.
#
# This macro will scan subdirectories's Makefile.objs, include them, to build
# up each variable listed in @vars.
#
# Per object and per module cflags and libs are saved with relative path fixed
# as well, those variables include -libs, -cflags and -objs. Items in -objs are
# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
#
# All nested variables postfixed by -m in names are treated as DSO variables,
# and will be built as modules, if enabled.
#
# A simple example of the unnest:
#
#     obj_prefix = ..
#     vars = hot cold
#     hot  = fire.o sun.o season/
#     cold = snow.o water/ season/
#
# Unnest through a faked source directory structure:
#
#     SRC_PATH
#        ├── water
#        │   └── Makefile.objs──────────────────┐
#        │       │ hot += steam.o               │
#        │       │ cold += ice.mo               │
#        │       │ ice.mo-libs := -licemaker    │
#        │       │ ice.mo-objs := ice1.o ice2.o │
#        │       └──────────────────────────────┘
#        │
#        └── season
#            └── Makefile.objs──────┐
#                │ hot += summer.o  │
#                │ cold += winter.o │
#                └──────────────────┘
#
# In the end, the result will be:
#
#     hot  = ../fire.o ../sun.o ../season/summer.o
#     cold = ../snow.o ../water/ice.mo ../season/winter.o
#     ../water/ice.mo-libs = -licemaker
#     ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
#
# Note that 'hot' didn't include 'water/' in the input, so 'steam.o' is not
# included.
#
define unnest-vars
    # In the case of target build (i.e. $1 == ..), fix path for top level
    # Makefile.objs objects
    $(if $1,$(call fix-paths,$1/,,$2))

    # Descend and include every subdir Makefile.objs
    $(foreach v, $2,
        $(call unnest-var-recursive,$1,$2,$v)
        # Pass the .mo-cflags and .mo-libs along to its member objects
        $(foreach o, $(filter %.mo,$($v)),
            $(foreach p,$($o-objs),
                $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
                $(if $($o-libs), $(eval $p-libs += $($o-libs))))))

    # For all %.mo objects that are directly added into -y, just expand them
    $(foreach v,$(filter %-y,$2),
        $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))

    $(foreach v,$(filter %-m,$2),
        # All .o found in *-m variables are single object modules, create .mo
        # for them
        $(foreach o,$(filter %.o,$($v)),
            $(eval $(o:%.o=%.mo)-objs := $o))
        # Now unify .o in -m variable to .mo
        $(eval $v := $($v:%.o=%.mo))
        $(eval modules-m += $($v))

        # For module build, build shared libraries during "make modules"
        # For non-module build, add -m to -y
        $(if $(CONFIG_MODULES),
             $(foreach o,$($v),
                   $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
                   $(eval $o: $($o-objs)))
             $(eval $(patsubst %-m,%-y,$v) += $($v))
             $(eval modules: $($v:%.mo=%$(DSOSUF))),
             $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))

    # Post-process all the unnested vars
    $(foreach v,$2,
        $(foreach o, $(filter %.mo,$($v)),
            # Find all the .mo objects in variables and add dependency rules
            # according to .mo-objs. Report error if not set
            $(if $($o-objs),
                $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
                $(error $o added in $v but $o-objs is not set)))
        $(shell mkdir -p ./ $(sort $(dir $($v))))
        # Include all the .d files
        $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$(filter %.o,$($v)))))
        $(eval $v := $(filter-out %/,$($v))))
endef

TEXI2MAN = $(call quiet-command, \
	perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $(TEXI2PODFLAGS) $< $@.pod && \
	$(POD2MAN) --section=$(subst .,,$(suffix $@)) --center=" " --release=" " $@.pod > $@, \
	"GEN","$@")

%.1:
	$(call TEXI2MAN)
%.7:
	$(call TEXI2MAN)
%.8:
	$(call TEXI2MAN)

# Support for building multiple output files by atomically executing
# a single rule which depends on several input files (so the rule
# will be executed exactly once, not once per output file, and
# not multiple times in parallel.) For more explanation see:
# https://www.cmcrossroads.com/article/atomic-rules-gnu-make

# Given a space-separated list of filenames, create the name of
# a 'sentinel' file to use to indicate that they have been built.
# We use fixed text on the end to avoid accidentally triggering
# automatic pattern rules, and . on the start to make the file
# not show up in ls output.
sentinel = .$(subst $(SPACE),_,$(subst /,_,$1)).sentinel.

# Define an atomic rule that builds multiple outputs from multiple inputs.
# To use:
#    $(call atomic,out1 out2 ...,in1 in2 ...)
#    <TAB>rule to do the operation
#
# Make 4.3 will have native support for this, and you would be able
# to instead write:
#    out1 out2 ... &: in1 in2 ...
#    <TAB>rule to do the operation
#
# The way this works is that it creates a make rule
# "out1 out2 ... : sentinel-file ; @:" which says that the sentinel
# depends on the dependencies, and the rule to do that is "do nothing".
# Then we have a rule
# "sentinel-file : in1 in2 ..."
# whose commands start with "touch sentinel-file" and then continue
# with the rule text provided by the user of this 'atomic' function.
# The foreach... is there to delete the sentinel file if any of the
# output files don't exist, so that we correctly rebuild in that situation.
atomic = $(eval $1: $(call sentinel,$1) ; @:) \
         $(call sentinel,$1) : $2 ; @touch $$@ \
         $(foreach t,$1,$(if $(wildcard $t),,$(shell rm -f $(call sentinel,$1))))

print-%:
	@echo '$*=$($*)'
Commit	Line	Data
17759187	1
5609c512 AB	2	# These are used when we want to do substitutions without confusing Make
	3	NULL :=
	4	SPACE := $(NULL) #
2f4e4dc2 FZ	5	COMMA := ,
2f4e4dc2 FZ	6
5ab28867 JQ	7	# Don't use implicit rules or variables
	8	# we have explicit rules for everything
	9	MAKEFLAGS += -rR
	10
	11	# Files with this suffixes are final, don't try to generate them
	12	# using implicit rules
a273f4ce PB	13	%/trace-events:
	14	%.hx:
	15	%.py:
	16	%.objs:
5ab28867 JQ	17	%.d:
	18	%.h:
	19	%.c:
c3dc9fd5	20	%.cc:
83f73fce	21	%.cpp:
5ab28867 JQ	22	%.m:
5ab28867 JQ	23	%.mak:
dced7eec	24	clean-target:
5ab28867	25
7ebf54bc	26	# Flags for dependency generation
998b7b1d	27	QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
02d5467e	28
ba78db44 DB	29	# Compiler searches the source file dir first, but in vpath builds
	30	# we need to make it search the build dir too, before any other
	31	# explicit search paths. There are two search locations in the build
	32	# dir, one absolute and the other relative to the compiler working
	33	# directory. These are the same for target-independent files, but
	34	# different for target-dependent ones.
a81df1b6	35	QEMU_LOCAL_INCLUDES = -iquote $(BUILD_DIR) -iquote $(BUILD_DIR)/$(@D) -iquote $(@D)
9d9199a0	36
c261d774	37	WL_U := -Wl,-u,
4852ee95	38	find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 \| $2)))
c261d774 FZ	39	defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
	40	undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
	41
1f0a1d8a MAL	42	WL := -Wl,
	43	ifdef CONFIG_DARWIN
	44	whole-archive = $(WL)-force_load,$1
	45	else
	46	whole-archive = $(WL)--whole-archive $1 $(WL)--no-whole-archive
	47	endif
	48
c261d774 FZ	49	# All the .mo objects in -m variables are also added into corresponding -y
	50	# variable in unnest-vars, but filtered out here, when LINK is called.
	51	#
	52	# The .mo objects are supposed to be linked as a DSO, for module build. So here
	53	# they are only used as a placeholders to generate those "archive undefined"
	54	# symbol options (-Wl,-u,$symbol_name), which are the archive functions
	55	# referenced by the code in the DSO.
	56	#
	57	# Also the presence in -y variables will also guarantee they are built before
	58	# linking executables that will load them. So we can look up symbol reference
	59	# in LINK.
	60	#
	61	# This is necessary because the exectuable itself may not use the function, in
	62	# which case the function would not be linked in. Then the DSO loading will
	63	# fail because of the missing symbol.
1f0a1d8a	64	process-archive-undefs = $(filter-out %.a %.fa %.mo,$1) \
c261d774	65	$(addprefix $(WL_U), \
1f0a1d8a	66	$(filter $(call defined-symbols,$(filter %.a %.fa, $1)), \
c261d774	67	$(call undefined-symbols,$(filter %.mo,$1)))) \
1f0a1d8a MAL	68	$(foreach l,$(filter %.fa,$1),$(call whole-archive,$l)) \
1f0a1d8a MAL	69	$(filter %.a,$1)
c261d774	70
5b1b6dbd	71	extract-libs = $(strip $(foreach o,$(filter-out %.mo,$1),$($o-libs)))
17969268 FZ	72	expand-objs = $(strip $(sort $(filter %.o,$1)) \
	73	$(foreach o,$(filter %.mo,$1),$($o-objs)) \
	74	$(filter-out %.o %.mo,$1))
5c0d52bc	75
0e8c9214	76	%.o: %.c
ac76f9d1	77	@mkdir -p $(dir $@)
ba78db44 DB	78	$(call quiet-command,$(CC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	79	$(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
	80	-c -o $@ $<,"CC","$(TARGET_DIR)$@")
6821cdc7	81	%.o: %.rc
0bdb12c7	82	$(call quiet-command,$(WINDRES) -I. -o $@ $<,"RC","$(TARGET_DIR)$@")
17759187	83
3144f78b PM	84	# If we have a CXX we might have some C++ objects, in which case we
	85	# must link with the C++ compiler, not the plain C compiler.
	86	LINKPROG = $(or $(CXX),$(CC))
	87
db5adeaa	88	LINK = $(call quiet-command, $(LINKPROG) $(CFLAGS) $(QEMU_LDFLAGS) -o $@ \
c261d774	89	$(call process-archive-undefs, $1) \
0bdb12c7	90	$(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")
44dc0ca3	91
5f6f0e27	92	%.o: %.S
ba78db44 DB	93	$(call quiet-command,$(CCAS) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	94	$(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) \
	95	-c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
17759187	96
c3dc9fd5	97	%.o: %.cc
ba78db44	98	$(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
086d5f75	99	$(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
ba78db44	100	-c -o $@ $<,"CXX","$(TARGET_DIR)$@")
c3dc9fd5	101
83f73fce	102	%.o: %.cpp
ba78db44	103	$(call quiet-command,$(CXX) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
086d5f75	104	$(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CXXFLAGS) $($@-cflags) \
ba78db44	105	-c -o $@ $<,"CXX","$(TARGET_DIR)$@")
83f73fce	106
17759187	107	%.o: %.m
ba78db44 DB	108	$(call quiet-command,$(OBJCC) $(QEMU_LOCAL_INCLUDES) $(QEMU_INCLUDES) \
	109	$(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) \
	110	-c -o $@ $<,"OBJC","$(TARGET_DIR)$@")
17759187	111
2c13ec50	112	%.o: %.dtrace
0bdb12c7	113	$(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")
2c13ec50	114
d24697e1 FZ	115	DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
d24697e1 FZ	116	module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
db5adeaa	117	%$(DSOSUF): QEMU_LDFLAGS += $(LDFLAGS_SHARED)
c261d774	118	%$(DSOSUF): %.mo
17969268	119	$(call LINK,$^)
e26110cf	120	@# Copy to build root so modules can be loaded when program started without install
0bdb12c7	121	$(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@),"CP","$(subst /,-,$@)"))
17969268	122
c261d774	123
7ecf44a5	124	LD_REL := $(CC) -nostdlib $(LD_REL_FLAGS)
c261d774 FZ	125
c261d774 FZ	126	%.mo:
0bdb12c7	127	$(call quiet-command,$(LD_REL) -o $@ $^,"LD","$(TARGET_DIR)$@")
c261d774	128
17969268 FZ	129	.PHONY: modules
	130	modules:
	131
3aa892d7	132	%$(EXESUF): %.o
1f0a1d8a	133	$(call LINK,$(filter %.o %.a %.mo %.fa, $^))
4f188f88	134
93a0dba7	135	%.a:
0bdb12c7	136	$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")
93a0dba7	137
0bdb12c7 PM	138	# Usage: $(call quiet-command,command and args,"NAME","args to print")
	139	# This will run "command and args", and either:
	140	# if V=1 just print the whole command and args
	141	# otherwise print the 'quiet' output in the format " NAME args to print"
	142	# NAME should be a short name of the command, 7 letters or fewer.
	143	# If called with only a single argument, will print nothing in quiet mode.
9df43317 PB	144	quiet-command-run = $(if $(V),,$(if $2,printf " %-7s %s\n" $2 $3 && ))$1
	145	quiet-@ = $(if $(V),,@)
	146	quiet-command = $(quiet-@)$(call quiet-command-run,$1,$2,$3)
70071e17 JQ	147
70071e17 JQ	148	# cc-option
8a2e6ab5	149	# Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
70071e17	150
fc3baad7 TM	151	cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
fc3baad7 TM	152	>/dev/null 2>&1 && echo OK), $2, $3)
036999e9 PB	153	cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
036999e9 PB	154	>/dev/null 2>&1 && echo OK), $2, $3)
1215c6e7	155
d52c454a	156	VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc Kconfig% %.json.in
288e7bcc	157	set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
076d2471	158
0d659426 MT	159	# install-prog list, dir
	160	define install-prog
	161	$(INSTALL_DIR) "$2"
	162	$(INSTALL_PROG) $1 "$2"
	163	$(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
	164	endef
	165
2b2e59e6 PB	166	# find-in-path
	167	# Usage: $(call find-in-path, prog)
	168	# Looks in the PATH if the argument contains no slash, else only considers one
	169	# specific directory. Returns an # empty string if the program doesn't exist
	170	# there.
88071589	171	find-in-path = $(if $(findstring /, $1), \
2b2e59e6 PB	172	$(wildcard $1), \
	173	$(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
	174
837a2e26 PM	175	# Logical functions (for operating on y/n values like CONFIG_FOO vars)
	176	# Inputs to these must be either "y" (true) or "n" or "" (both false)
	177	# Output is always either "y" or "n".
	178	# Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
	179	# Logical NOT
	180	lnot = $(if $(subst n,,$1),n,y)
	181	# Logical AND
	182	land = $(if $(findstring yy,$1$2),y,n)
	183	# Logical OR
	184	lor = $(if $(findstring y,$1$2),y,n)
	185	# Logical XOR (note that this is the inverse of leqv)
	186	lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
	187	# Logical equivalence (note that leqv "","n" is true)
	188	leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
	189	# Logical if: like make's $(if) but with an leqv-like test
	190	lif = $(if $(subst n,,$1),$2,$3)
	191
9ef622e3 PM	192	# String testing functions: inputs to these can be any string;
	193	# the output is always either "y" or "n". Leading and trailing whitespace
	194	# is ignored when comparing strings.
	195	# String equality
	196	eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
	197	# String inequality
	198	ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
	199	# Emptiness/non-emptiness tests:
	200	isempty = $(if $1,n,y)
	201	notempty = $(if $1,y,n)
	202
c0424934 LV	203	# Generate files with tracetool
	204	TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
	205
7586317b MT	206	.PHONY: clean-timestamp
	207	clean-timestamp:
	208	rm -f *.timestamp
	209	clean: clean-timestamp
	210
7dbbbb0c MT	211	# will delete the target of a rule if commands exit with a nonzero exit status
7dbbbb0c MT	212	.DELETE_ON_ERROR:
e05804ee	213
1c33ac57 FZ	214	# save-vars
	215	# Usage: $(call save-vars, vars)
	216	# Save each variable $v in $vars as save-vars-$v, save their object's
5ffb3505 PB	217	# variables, then clear $v. saved-vars-$v contains the variables that
5ffb3505 PB	218	# where saved for the objects, in order to speedup load-vars.
1c33ac57 FZ	219	define save-vars
	220	$(foreach v,$1,
	221	$(eval save-vars-$v := $(value $v))
5ffb3505 PB	222	$(eval saved-vars-$v := $(foreach o,$($v), \
	223	$(if $($o-cflags), $o-cflags $(eval save-vars-$o-cflags := $($o-cflags))$(eval $o-cflags := )) \
	224	$(if $($o-libs), $o-libs $(eval save-vars-$o-libs := $($o-libs))$(eval $o-libs := )) \
	225	$(if $($o-objs), $o-objs $(eval save-vars-$o-objs := $($o-objs))$(eval $o-objs := ))))
1c33ac57	226	$(eval $v := ))
5c0d52bc FZ	227	endef
5c0d52bc FZ	228
1c33ac57 FZ	229	# load-vars
	230	# Usage: $(call load-vars, vars, add_var)
	231	# Load the saved value for each variable in @vars, and the per object
	232	# variables.
	233	# Append @add_var's current value to the loaded value.
	234	define load-vars
	235	$(eval $2-new-value := $(value $2))
	236	$(foreach v,$1,
	237	$(eval $v := $(value save-vars-$v))
5ffb3505 PB	238	$(foreach o,$(saved-vars-$v),
	239	$(eval $o := $(save-vars-$o)) $(eval save-vars-$o := ))
	240	$(eval save-vars-$v := )
	241	$(eval saved-vars-$v := ))
1c33ac57	242	$(eval $2 := $(value $2) $($2-new-value))
e05804ee PB	243	endef
e05804ee PB	244
1c33ac57 FZ	245	# fix-paths
	246	# Usage: $(call fix-paths, obj_path, src_path, vars)
	247	# Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
	248	# directories in @vars.
	249	define fix-paths
	250	$(foreach v,$3,
	251	$(foreach o,$($v),
	252	$(if $($o-libs),
	253	$(eval $1$o-libs := $($o-libs)))
	254	$(if $($o-cflags),
	255	$(eval $1$o-cflags := $($o-cflags)))
	256	$(if $($o-objs),
	257	$(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
	258	$(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
	259	$(addprefix $2,$(filter %/,$($v)))))
e05804ee PB	260	endef
e05804ee PB	261
1c33ac57 FZ	262	# unnest-var-recursive
	263	# Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
	264	#
	265	# Unnest @var by including subdir Makefile.objs, while protect others in @vars
	266	# unchanged.
	267	#
	268	# @obj_prefix is the starting point of object path prefix.
	269	#
	270	define unnest-var-recursive
	271	$(eval dirs := $(sort $(filter %/,$($3))))
	272	$(eval $3 := $(filter-out %/,$($3)))
	273	$(foreach d,$(dirs:%/=%),
	274	$(call save-vars,$2)
	275	$(eval obj := $(if $1,$1/)$d)
	276	$(eval -include $(SRC_PATH)/$d/Makefile.objs)
	277	$(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
	278	$(call load-vars,$2,$3)
	279	$(call unnest-var-recursive,$1,$2,$3))
17969268 FZ	280	endef
17969268 FZ	281
1c33ac57 FZ	282	# unnest-vars
	283	# Usage: $(call unnest-vars, obj_prefix, vars)
	284	#
	285	# @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
	286	# ending '/'.
	287	#
	288	# @vars: the list of variable names to unnest.
	289	#
	290	# This macro will scan subdirectories's Makefile.objs, include them, to build
	291	# up each variable listed in @vars.
	292	#
	293	# Per object and per module cflags and libs are saved with relative path fixed
	294	# as well, those variables include -libs, -cflags and -objs. Items in -objs are
	295	# also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
	296	#
	297	# All nested variables postfixed by -m in names are treated as DSO variables,
	298	# and will be built as modules, if enabled.
	299	#
	300	# A simple example of the unnest:
	301	#
	302	# obj_prefix = ..
	303	# vars = hot cold
	304	# hot = fire.o sun.o season/
	305	# cold = snow.o water/ season/
	306	#
	307	# Unnest through a faked source directory structure:
	308	#
	309	# SRC_PATH
	310	# ├── water
	311	# │ └── Makefile.objs──────────────────┐
	312	# │ │ hot += steam.o │
	313	# │ │ cold += ice.mo │
	314	# │ │ ice.mo-libs := -licemaker │
	315	# │ │ ice.mo-objs := ice1.o ice2.o │
	316	# │ └──────────────────────────────┘
	317	# │
	318	# └── season
	319	# └── Makefile.objs──────┐
	320	# │ hot += summer.o │
	321	# │ cold += winter.o │
	322	# └──────────────────┘
	323	#
	324	# In the end, the result will be:
	325	#
	326	# hot = ../fire.o ../sun.o ../season/summer.o
	327	# cold = ../snow.o ../water/ice.mo ../season/winter.o
	328	# ../water/ice.mo-libs = -licemaker
	329	# ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
	330	#
9ab71e5e	331	# Note that 'hot' didn't include 'water/' in the input, so 'steam.o' is not
1c33ac57 FZ	332	# included.
1c33ac57 FZ	333	#
e05804ee	334	define unnest-vars
1c33ac57 FZ	335	# In the case of target build (i.e. $1 == ..), fix path for top level
	336	# Makefile.objs objects
	337	$(if $1,$(call fix-paths,$1/,,$2))
	338
	339	# Descend and include every subdir Makefile.objs
c88f68ec FZ	340	$(foreach v, $2,
	341	$(call unnest-var-recursive,$1,$2,$v)
	342	# Pass the .mo-cflags and .mo-libs along to its member objects
	343	$(foreach o, $(filter %.mo,$($v)),
	344	$(foreach p,$($o-objs),
	345	$(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
	346	$(if $($o-libs), $(eval $p-libs += $($o-libs))))))
	347
	348	# For all %.mo objects that are directly added into -y, just expand them
	349	$(foreach v,$(filter %-y,$2),
	350	$(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
1c33ac57 FZ	351
	352	$(foreach v,$(filter %-m,$2),
	353	# All .o found in *-m variables are single object modules, create .mo
	354	# for them
	355	$(foreach o,$(filter %.o,$($v)),
	356	$(eval $(o:%.o=%.mo)-objs := $o))
	357	# Now unify .o in -m variable to .mo
	358	$(eval $v := $($v:%.o=%.mo))
	359	$(eval modules-m += $($v))
	360
	361	# For module build, build shared libraries during "make modules"
	362	# For non-module build, add -m to -y
	363	$(if $(CONFIG_MODULES),
c261d774	364	$(foreach o,$($v),
d24697e1	365	$(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
c261d774 FZ	366	$(eval $o: $($o-objs)))
c261d774 FZ	367	$(eval $(patsubst %-m,%-y,$v) += $($v))
1c33ac57 FZ	368	$(eval modules: $($v:%.mo=%$(DSOSUF))),
	369	$(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
	370
	371	# Post-process all the unnested vars
	372	$(foreach v,$2,
	373	$(foreach o, $(filter %.mo,$($v)),
	374	# Find all the .mo objects in variables and add dependency rules
	375	# according to .mo-objs. Report error if not set
	376	$(if $($o-objs),
	377	$(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
c88f68ec	378	$(error $o added in $v but $o-objs is not set)))
1c33ac57 FZ	379	$(shell mkdir -p ./ $(sort $(dir $($v))))
1c33ac57 FZ	380	# Include all the .d files
1f0a1d8a	381	$(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$(filter %.o,$($v)))))
1c33ac57	382	$(eval $v := $(filter-out %/,$($v))))
e05804ee	383	endef
76480423 MAL	384
76480423 MAL	385	TEXI2MAN = $(call quiet-command, \
d59157ea	386	perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $(TEXI2PODFLAGS) $< $@.pod && \
76480423 MAL	387	$(POD2MAN) --section=$(subst .,,$(suffix $@)) --center=" " --release=" " $@.pod > $@, \
	388	"GEN","$@")
	389
	390	%.1:
	391	$(call TEXI2MAN)
56e8bdd4 MAL	392	%.7:
56e8bdd4 MAL	393	$(call TEXI2MAN)
76480423 MAL	394	%.8:
76480423 MAL	395	$(call TEXI2MAN)
d52c454a	396
e0f3728d PM	397	# Support for building multiple output files by atomically executing
	398	# a single rule which depends on several input files (so the rule
	399	# will be executed exactly once, not once per output file, and
	400	# not multiple times in parallel.) For more explanation see:
	401	# https://www.cmcrossroads.com/article/atomic-rules-gnu-make
	402
	403	# Given a space-separated list of filenames, create the name of
	404	# a 'sentinel' file to use to indicate that they have been built.
	405	# We use fixed text on the end to avoid accidentally triggering
	406	# automatic pattern rules, and . on the start to make the file
	407	# not show up in ls output.
	408	sentinel = .$(subst $(SPACE),_,$(subst /,_,$1)).sentinel.
	409
	410	# Define an atomic rule that builds multiple outputs from multiple inputs.
	411	# To use:
	412	# $(call atomic,out1 out2 ...,in1 in2 ...)
	413	# <TAB>rule to do the operation
	414	#
	415	# Make 4.3 will have native support for this, and you would be able
	416	# to instead write:
	417	# out1 out2 ... &: in1 in2 ...
	418	# <TAB>rule to do the operation
	419	#
	420	# The way this works is that it creates a make rule
	421	# "out1 out2 ... : sentinel-file ; @:" which says that the sentinel
	422	# depends on the dependencies, and the rule to do that is "do nothing".
	423	# Then we have a rule
	424	# "sentinel-file : in1 in2 ..."
	425	# whose commands start with "touch sentinel-file" and then continue
	426	# with the rule text provided by the user of this 'atomic' function.
	427	# The foreach... is there to delete the sentinel file if any of the
	428	# output files don't exist, so that we correctly rebuild in that situation.
	429	atomic = $(eval $1: $(call sentinel,$1) ; @:) \
	430	$(call sentinel,$1) : $2 ; @touch $$@ \
	431	$(foreach t,$1,$(if $(wildcard $t),,$(shell rm -f $(call sentinel,$1))))
1a28f878 PMD	432
	433	print-%:
	434	@echo '$=$($)'