4 # Don't use implicit rules or variables
5 # we have explicit rules for everything
8 # Files with this suffixes are final, don't try to generate them
19 # Flags for C++ compilation
20 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
22 # Flags for dependency generation
23 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
25 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
26 QEMU_INCLUDES += -I$(<D) -I$(@D)
29 find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
30 defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
31 undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
33 # All the .mo objects in -m variables are also added into corresponding -y
34 # variable in unnest-vars, but filtered out here, when LINK is called.
36 # The .mo objects are supposed to be linked as a DSO, for module build. So here
37 # they are only used as a placeholders to generate those "archive undefined"
38 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
39 # referenced by the code in the DSO.
41 # Also the presence in -y variables will also guarantee they are built before
42 # linking executables that will load them. So we can look up symbol reference
45 # This is necessary because the exectuable itself may not use the function, in
46 # which case the function would not be linked in. Then the DSO loading will
47 # fail because of the missing symbol.
48 process-archive-undefs = $(filter-out %.a %.mo,$1) \
49 $(addprefix $(WL_U), \
50 $(filter $(call defined-symbols,$(filter %.a, $1)), \
51 $(call undefined-symbols,$(filter %.mo,$1)))) \
54 extract-libs = $(strip $(foreach o,$(filter-out %.mo,$1),$($o-libs)))
55 expand-objs = $(strip $(sort $(filter %.o,$1)) \
56 $(foreach o,$(filter %.mo,$1),$($o-objs)) \
57 $(filter-out %.o %.mo,$1))
60 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CC","$(TARGET_DIR)$@")
62 $(call quiet-command,$(WINDRES) -I. -o $@ $<,"RC","$(TARGET_DIR)$@")
64 # If we have a CXX we might have some C++ objects, in which case we
65 # must link with the C++ compiler, not the plain C compiler.
66 LINKPROG = $(or $(CXX),$(CC))
68 LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
69 $(call process-archive-undefs, $1) \
70 $(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")
73 $(call quiet-command,$(CCAS) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
76 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
79 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
82 $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"OBJC","$(TARGET_DIR)$@")
85 $(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")
87 DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
88 module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
89 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
92 @# Copy to build root so modules can be loaded when program started without install
93 $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@),"CP","$(subst /,-,$@)"))
96 LD_REL := $(CC) -nostdlib $(LD_REL_FLAGS)
99 $(call quiet-command,$(LD_REL) -o $@ $^,"LD","$(TARGET_DIR)$@")
105 $(call LINK,$(filter %.o %.a %.mo, $^))
108 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")
110 # Usage: $(call quiet-command,command and args,"NAME","args to print")
111 # This will run "command and args", and either:
112 # if V=1 just print the whole command and args
113 # otherwise print the 'quiet' output in the format " NAME args to print"
114 # NAME should be a short name of the command, 7 letters or fewer.
115 # If called with only a single argument, will print nothing in quiet mode.
116 quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
119 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
121 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
122 >/dev/null 2>&1 && echo OK), $2, $3)
123 cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
124 >/dev/null 2>&1 && echo OK), $2, $3)
126 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
127 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
129 # install-prog list, dir
132 $(INSTALL_PROG) $1 "$2"
133 $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
137 # Usage: $(call find-in-path, prog)
138 # Looks in the PATH if the argument contains no slash, else only considers one
139 # specific directory. Returns an # empty string if the program doesn't exist
141 find-in-path = $(if $(findstring /, $1), \
143 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
145 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
146 # Inputs to these must be either "y" (true) or "n" or "" (both false)
147 # Output is always either "y" or "n".
148 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
150 lnot = $(if $(subst n,,$1),n,y)
152 land = $(if $(findstring yy,$1$2),y,n)
154 lor = $(if $(findstring y,$1$2),y,n)
155 # Logical XOR (note that this is the inverse of leqv)
156 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
157 # Logical equivalence (note that leqv "","n" is true)
158 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
159 # Logical if: like make's $(if) but with an leqv-like test
160 lif = $(if $(subst n,,$1),$2,$3)
162 # String testing functions: inputs to these can be any string;
163 # the output is always either "y" or "n". Leading and trailing whitespace
164 # is ignored when comparing strings.
166 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
168 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
169 # Emptiness/non-emptiness tests:
170 isempty = $(if $1,n,y)
171 notempty = $(if $1,y,n)
173 # Generate files with tracetool
174 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
176 # Generate timestamp files for .h include files
178 config-%.h: config-%.h-timestamp
179 @cmp $< $@ >/dev/null 2>&1 || cp $< $@
181 config-%.h-timestamp: config-%.mak $(SRC_PATH)/scripts/create_config
182 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@,"GEN","$(TARGET_DIR)config-$*.h")
184 .PHONY: clean-timestamp
187 clean: clean-timestamp
189 # will delete the target of a rule if commands exit with a nonzero exit status
193 # Usage: $(call save-vars, vars)
194 # Save each variable $v in $vars as save-vars-$v, save their object's
195 # variables, then clear $v. saved-vars-$v contains the variables that
196 # where saved for the objects, in order to speedup load-vars.
199 $(eval save-vars-$v := $(value $v))
200 $(eval saved-vars-$v := $(foreach o,$($v), \
201 $(if $($o-cflags), $o-cflags $(eval save-vars-$o-cflags := $($o-cflags))$(eval $o-cflags := )) \
202 $(if $($o-libs), $o-libs $(eval save-vars-$o-libs := $($o-libs))$(eval $o-libs := )) \
203 $(if $($o-objs), $o-objs $(eval save-vars-$o-objs := $($o-objs))$(eval $o-objs := ))))
208 # Usage: $(call load-vars, vars, add_var)
209 # Load the saved value for each variable in @vars, and the per object
211 # Append @add_var's current value to the loaded value.
213 $(eval $2-new-value := $(value $2))
215 $(eval $v := $(value save-vars-$v))
216 $(foreach o,$(saved-vars-$v),
217 $(eval $o := $(save-vars-$o)) $(eval save-vars-$o := ))
218 $(eval save-vars-$v := )
219 $(eval saved-vars-$v := ))
220 $(eval $2 := $(value $2) $($2-new-value))
224 # Usage: $(call fix-paths, obj_path, src_path, vars)
225 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
226 # directories in @vars.
231 $(eval $1$o-libs := $($o-libs)))
233 $(eval $1$o-cflags := $($o-cflags)))
235 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
236 $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
237 $(addprefix $2,$(filter %/,$($v)))))
240 # unnest-var-recursive
241 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
243 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
246 # @obj_prefix is the starting point of object path prefix.
248 define unnest-var-recursive
249 $(eval dirs := $(sort $(filter %/,$($3))))
250 $(eval $3 := $(filter-out %/,$($3)))
251 $(foreach d,$(dirs:%/=%),
253 $(eval obj := $(if $1,$1/)$d)
254 $(eval -include $(SRC_PATH)/$d/Makefile.objs)
255 $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
256 $(call load-vars,$2,$3)
257 $(call unnest-var-recursive,$1,$2,$3))
261 # Usage: $(call unnest-vars, obj_prefix, vars)
263 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
266 # @vars: the list of variable names to unnest.
268 # This macro will scan subdirectories's Makefile.objs, include them, to build
269 # up each variable listed in @vars.
271 # Per object and per module cflags and libs are saved with relative path fixed
272 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
273 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
275 # All nested variables postfixed by -m in names are treated as DSO variables,
276 # and will be built as modules, if enabled.
278 # A simple example of the unnest:
282 # hot = fire.o sun.o season/
283 # cold = snow.o water/ season/
285 # Unnest through a faked source directory structure:
289 # │ └── Makefile.objs──────────────────┐
290 # │ │ hot += steam.o │
291 # │ │ cold += ice.mo │
292 # │ │ ice.mo-libs := -licemaker │
293 # │ │ ice.mo-objs := ice1.o ice2.o │
294 # │ └──────────────────────────────┘
297 # └── Makefile.objs──────┐
298 # │ hot += summer.o │
299 # │ cold += winter.o │
300 # └──────────────────┘
302 # In the end, the result will be:
304 # hot = ../fire.o ../sun.o ../season/summer.o
305 # cold = ../snow.o ../water/ice.mo ../season/winter.o
306 # ../water/ice.mo-libs = -licemaker
307 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
309 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
313 # In the case of target build (i.e. $1 == ..), fix path for top level
314 # Makefile.objs objects
315 $(if $1,$(call fix-paths,$1/,,$2))
317 # Descend and include every subdir Makefile.objs
319 $(call unnest-var-recursive,$1,$2,$v)
320 # Pass the .mo-cflags and .mo-libs along to its member objects
321 $(foreach o, $(filter %.mo,$($v)),
322 $(foreach p,$($o-objs),
323 $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
324 $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
326 # For all %.mo objects that are directly added into -y, just expand them
327 $(foreach v,$(filter %-y,$2),
328 $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
330 $(foreach v,$(filter %-m,$2),
331 # All .o found in *-m variables are single object modules, create .mo
333 $(foreach o,$(filter %.o,$($v)),
334 $(eval $(o:%.o=%.mo)-objs := $o))
335 # Now unify .o in -m variable to .mo
336 $(eval $v := $($v:%.o=%.mo))
337 $(eval modules-m += $($v))
339 # For module build, build shared libraries during "make modules"
340 # For non-module build, add -m to -y
341 $(if $(CONFIG_MODULES),
343 $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
344 $(eval $o: $($o-objs)))
345 $(eval $(patsubst %-m,%-y,$v) += $($v))
346 $(eval modules: $($v:%.mo=%$(DSOSUF))),
347 $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
349 # Post-process all the unnested vars
351 $(foreach o, $(filter %.mo,$($v)),
352 # Find all the .mo objects in variables and add dependency rules
353 # according to .mo-objs. Report error if not set
355 $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
356 $(error $o added in $v but $o-objs is not set)))
357 $(shell mkdir -p ./ $(sort $(dir $($v))))
358 # Include all the .d files
359 $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$($v))))
360 $(eval $v := $(filter-out %/,$($v))))