2 # These are used when we want to do substitutions without confusing Make
7 # Don't use implicit rules or variables
8 # we have explicit rules for everything
11 # Files with this suffixes are final, don't try to generate them
12 # using implicit rules
26 # Flags for C++ compilation
27 QEMU_CXXFLAGS
:= -D__STDC_LIMIT_MACROS
$(filter-out -Wstrict-prototypes
-Wmissing-prototypes
-Wnested-externs
-Wno-override-init
-Wold-style-declaration
-Wold-style-definition
-Wredundant-decls
, ${QEMU_CXXFLAGS})
29 # Flags for dependency generation
30 QEMU_DGFLAGS
+= -MMD
-MP
-MT
$@
-MF
$(@D
)/$(*F
).d
32 # Compiler searches the source file dir first, but in vpath builds
33 # we need to make it search the build dir too, before any other
34 # explicit search paths. There are two search locations in the build
35 # dir, one absolute and the other relative to the compiler working
36 # directory. These are the same for target-independent files, but
37 # different for target-dependent ones.
38 QEMU_LOCAL_INCLUDES
= -iquote
$(BUILD_DIR
)/$(@D
) -iquote
$(@D
)
41 find-symbols
= $(if
$1, $(sort $(shell $(NM
) -P
-g
$1 |
$2)))
42 defined-symbols
= $(call find-symbols
,$1,awk
'$$2!="U"{print $$1}')
43 undefined-symbols
= $(call find-symbols
,$1,awk
'$$2=="U"{print $$1}')
45 # All the .mo objects in -m variables are also added into corresponding -y
46 # variable in unnest-vars, but filtered out here, when LINK is called.
48 # The .mo objects are supposed to be linked as a DSO, for module build. So here
49 # they are only used as a placeholders to generate those "archive undefined"
50 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
51 # referenced by the code in the DSO.
53 # Also the presence in -y variables will also guarantee they are built before
54 # linking executables that will load them. So we can look up symbol reference
57 # This is necessary because the exectuable itself may not use the function, in
58 # which case the function would not be linked in. Then the DSO loading will
59 # fail because of the missing symbol.
60 process-archive-undefs
= $(filter-out %.a
%.mo
,$1) \
61 $(addprefix $(WL_U
), \
62 $(filter $(call defined-symbols
,$(filter %.a
, $1)), \
63 $(call undefined-symbols
,$(filter %.mo
,$1)))) \
66 extract-libs
= $(strip $(foreach o
,$(filter-out %.mo
,$1),$($o-libs
)))
67 expand-objs
= $(strip $(sort $(filter %.o
,$1)) \
68 $(foreach o
,$(filter %.mo
,$1),$($o-objs
)) \
69 $(filter-out %.o
%.mo
,$1))
72 $(call quiet-command
,$(CC
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
73 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
74 -c
-o
$@
$<,"CC","$(TARGET_DIR)$@")
76 $(call quiet-command
,$(WINDRES
) -I.
-o
$@
$<,"RC","$(TARGET_DIR)$@")
78 # If we have a CXX we might have some C++ objects, in which case we
79 # must link with the C++ compiler, not the plain C compiler.
80 LINKPROG
= $(or
$(CXX
),$(CC
))
82 LINK
= $(call quiet-command
, $(LINKPROG
) $(QEMU_LDFLAGS
) $(QEMU_CFLAGS
) $(CFLAGS
) $(LDFLAGS
) -o
$@ \
83 $(call process-archive-undefs
, $1) \
84 $(version-obj-y
) $(call extract-libs
,$1) $(LIBS
),"LINK","$(TARGET_DIR)$@")
87 $(call quiet-command
,$(CCAS
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
88 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) \
89 -c
-o
$@
$<,"CCAS","$(TARGET_DIR)$@")
92 $(call quiet-command
,$(CXX
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
93 $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
94 -c
-o
$@
$<,"CXX","$(TARGET_DIR)$@")
97 $(call quiet-command
,$(CXX
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
98 $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
99 -c
-o
$@
$<,"CXX","$(TARGET_DIR)$@")
102 $(call quiet-command
,$(OBJCC
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
103 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
104 -c
-o
$@
$<,"OBJC","$(TARGET_DIR)$@")
107 $(call quiet-command
,dtrace
-o
$@
-G
-s
$<,"GEN","$(TARGET_DIR)$@")
110 DSO_OBJ_CFLAGS
:= -DBUILD_DSO
112 DSO_OBJ_CFLAGS
:= -fPIC
-DBUILD_DSO
114 module-common.o
: CFLAGS
+= $(DSO_OBJ_CFLAGS
)
115 %$(DSOSUF
): LDFLAGS
+= $(LDFLAGS_SHARED
)
118 @
# Copy to build root so modules can be loaded when program started without install
119 $(if
$(findstring /,$@
),$(call quiet-command
,cp
$@
$(subst /,-,$@
),"CP","$(subst /,-,$@)"))
122 LD_REL
:= $(CC
) -nostdlib
$(LD_REL_FLAGS
)
125 $(call quiet-command
,$(LD_REL
) -o
$@
$^
,"LD","$(TARGET_DIR)$@")
131 $(call LINK
,$(filter %.o
%.a
%.mo
, $^
))
134 $(call quiet-command
,rm -f
$@
&& $(AR
) rcs
$@
$^
,"AR","$(TARGET_DIR)$@")
136 # Usage: $(call quiet-command,command and args,"NAME","args to print")
137 # This will run "command and args", and either:
138 # if V=1 just print the whole command and args
139 # otherwise print the 'quiet' output in the format " NAME args to print"
140 # NAME should be a short name of the command, 7 letters or fewer.
141 # If called with only a single argument, will print nothing in quiet mode.
142 quiet-command-run
= $(if
$(V
),,$(if
$2,printf
" %-7s %s\n" $2 $3 && ))$1
143 quiet-@
= $(if
$(V
),,@
)
144 quiet-command
= $(quiet-@
)$(call quiet-command-run
,$1,$2,$3)
147 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
149 cc-option
= $(if
$(shell $(CC
) $1 $2 -S
-o
/dev
/null
-xc
/dev
/null \
150 >/dev
/null
2>&1 && echo OK
), $2, $3)
151 cc-c-option
= $(if
$(shell $(CC
) $1 $2 -c
-o
/dev
/null
-xc
/dev
/null \
152 >/dev
/null
2>&1 && echo OK
), $2, $3)
154 VPATH_SUFFIXES
= %.c
%.h
%.S
%.
cc %.
cpp %.m
%.mak
%.texi
%.sh
%.rc Kconfig
% %.json.in
155 set-vpath
= $(if
$1,$(foreach PATTERN
,$(VPATH_SUFFIXES
),$(eval vpath
$(PATTERN
) $1)))
157 # install-prog list, dir
160 $(INSTALL_PROG
) $1 "$2"
161 $(if
$(STRIP
),$(STRIP
) $(foreach T
,$1,"$2/$(notdir $T)"),)
165 # Usage: $(call find-in-path, prog)
166 # Looks in the PATH if the argument contains no slash, else only considers one
167 # specific directory. Returns an # empty string if the program doesn't exist
169 find-in-path
= $(if
$(findstring /, $1), \
171 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH
)))))
173 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
174 # Inputs to these must be either "y" (true) or "n" or "" (both false)
175 # Output is always either "y" or "n".
176 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
178 lnot
= $(if
$(subst n
,,$1),n
,y
)
180 land
= $(if
$(findstring yy
,$1$2),y
,n
)
182 lor
= $(if
$(findstring y
,$1$2),y
,n
)
183 # Logical XOR (note that this is the inverse of leqv)
184 lxor
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),n
,y
)
185 # Logical equivalence (note that leqv "","n" is true)
186 leqv
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),y
,n
)
187 # Logical if: like make's $(if) but with an leqv-like test
188 lif
= $(if
$(subst n
,,$1),$2,$3)
190 # String testing functions: inputs to these can be any string;
191 # the output is always either "y" or "n". Leading and trailing whitespace
192 # is ignored when comparing strings.
194 eq
= $(if
$(subst $2,,$1)$(subst $1,,$2),n
,y
)
196 ne
= $(if
$(subst $2,,$1)$(subst $1,,$2),y
,n
)
197 # Emptiness/non-emptiness tests:
198 isempty
= $(if
$1,n
,y
)
199 notempty
= $(if
$1,y
,n
)
201 # Generate files with tracetool
202 TRACETOOL
=$(PYTHON
) $(SRC_PATH
)/scripts
/tracetool.py
204 # Generate timestamp files for .h include files
206 config-
%.h
: config-
%.h-timestamp
207 @cmp
$< $@
>/dev
/null
2>&1 || cp
$< $@
209 config-
%.h-timestamp
: config-
%.mak
$(SRC_PATH
)/scripts
/create_config
210 $(call quiet-command
, sh
$(SRC_PATH
)/scripts
/create_config
< $< > $@
,"GEN","$(TARGET_DIR)config-$*.h")
212 .PHONY
: clean-timestamp
215 clean: clean-timestamp
217 # will delete the target of a rule if commands exit with a nonzero exit status
221 # Usage: $(call save-vars, vars)
222 # Save each variable $v in $vars as save-vars-$v, save their object's
223 # variables, then clear $v. saved-vars-$v contains the variables that
224 # where saved for the objects, in order to speedup load-vars.
227 $(eval save-vars-
$v := $(value
$v))
228 $(eval saved-vars-
$v := $(foreach o
,$($v), \
229 $(if
$($o-cflags
), $o-cflags
$(eval save-vars-
$o-cflags
:= $($o-cflags
))$(eval
$o-cflags
:= )) \
230 $(if
$($o-libs
), $o-libs
$(eval save-vars-
$o-libs
:= $($o-libs
))$(eval
$o-libs
:= )) \
231 $(if
$($o-objs
), $o-objs
$(eval save-vars-
$o-objs
:= $($o-objs
))$(eval
$o-objs
:= ))))
236 # Usage: $(call load-vars, vars, add_var)
237 # Load the saved value for each variable in @vars, and the per object
239 # Append @add_var's current value to the loaded value.
241 $(eval
$2-new-value
:= $(value
$2))
243 $(eval
$v := $(value save-vars-
$v))
244 $(foreach o
,$(saved-vars-
$v),
245 $(eval
$o := $(save-vars-
$o)) $(eval save-vars-
$o := ))
246 $(eval save-vars-
$v := )
247 $(eval saved-vars-
$v := ))
248 $(eval
$2 := $(value
$2) $($2-new-value
))
252 # Usage: $(call fix-paths, obj_path, src_path, vars)
253 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
254 # directories in @vars.
259 $(eval
$1$o-libs
:= $($o-libs
)))
261 $(eval
$1$o-cflags
:= $($o-cflags
)))
263 $(eval
$1$o-objs
:= $(addprefix $1,$($o-objs
)))))
264 $(eval
$v := $(addprefix $1,$(filter-out %/,$($v))) \
265 $(addprefix $2,$(filter %/,$($v)))))
268 # unnest-var-recursive
269 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
271 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
274 # @obj_prefix is the starting point of object path prefix.
276 define unnest-var-recursive
277 $(eval dirs
:= $(sort $(filter %/,$($3))))
278 $(eval
$3 := $(filter-out %/,$($3)))
279 $(foreach d
,$(dirs
:%/=%),
281 $(eval obj
:= $(if
$1,$1/)$d)
282 $(eval
-include $(SRC_PATH
)/$d/Makefile.objs
)
283 $(call fix-paths
,$(if
$1,$1/)$d/,$d/,$2)
284 $(call load-vars
,$2,$3)
285 $(call unnest-var-recursive
,$1,$2,$3))
289 # Usage: $(call unnest-vars, obj_prefix, vars)
291 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
294 # @vars: the list of variable names to unnest.
296 # This macro will scan subdirectories's Makefile.objs, include them, to build
297 # up each variable listed in @vars.
299 # Per object and per module cflags and libs are saved with relative path fixed
300 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
301 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
303 # All nested variables postfixed by -m in names are treated as DSO variables,
304 # and will be built as modules, if enabled.
306 # A simple example of the unnest:
310 # hot = fire.o sun.o season/
311 # cold = snow.o water/ season/
313 # Unnest through a faked source directory structure:
317 # │ └── Makefile.objs──────────────────┐
318 # │ │ hot += steam.o │
319 # │ │ cold += ice.mo │
320 # │ │ ice.mo-libs := -licemaker │
321 # │ │ ice.mo-objs := ice1.o ice2.o │
322 # │ └──────────────────────────────┘
325 # └── Makefile.objs──────┐
326 # │ hot += summer.o │
327 # │ cold += winter.o │
328 # └──────────────────┘
330 # In the end, the result will be:
332 # hot = ../fire.o ../sun.o ../season/summer.o
333 # cold = ../snow.o ../water/ice.mo ../season/winter.o
334 # ../water/ice.mo-libs = -licemaker
335 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
337 # Note that 'hot' didn't include 'water/' in the input, so 'steam.o' is not
341 # In the case of target build (i.e. $1 == ..), fix path for top level
342 # Makefile.objs objects
343 $(if
$1,$(call fix-paths
,$1/,,$2))
345 # Descend and include every subdir Makefile.objs
347 $(call unnest-var-recursive
,$1,$2,$v)
348 # Pass the .mo-cflags and .mo-libs along to its member objects
349 $(foreach o
, $(filter %.mo
,$($v)),
350 $(foreach p
,$($o-objs
),
351 $(if
$($o-cflags
), $(eval
$p-cflags
+= $($o-cflags
)))
352 $(if
$($o-libs
), $(eval
$p-libs
+= $($o-libs
))))))
354 # For all %.mo objects that are directly added into -y, just expand them
355 $(foreach v
,$(filter %-y
,$2),
356 $(eval
$v := $(foreach o
,$($v),$(if
$($o-objs
),$($o-objs
),$o))))
358 $(foreach v
,$(filter %-m
,$2),
359 # All .o found in *-m variables are single object modules, create .mo
361 $(foreach o
,$(filter %.o
,$($v)),
362 $(eval
$(o
:%.o
=%.mo
)-objs
:= $o))
363 # Now unify .o in -m variable to .mo
364 $(eval
$v := $($v:%.o
=%.mo
))
365 $(eval modules-m
+= $($v))
367 # For module build, build shared libraries during "make modules"
368 # For non-module build, add -m to -y
369 $(if
$(CONFIG_MODULES
),
371 $(eval
$($o-objs
): CFLAGS
+= $(DSO_OBJ_CFLAGS
))
372 $(eval
$o: $($o-objs
)))
373 $(eval
$(patsubst %-m
,%-y
,$v) += $($v))
374 $(eval modules
: $($v:%.mo
=%$(DSOSUF
))),
375 $(eval
$(patsubst %-m
,%-y
,$v) += $(call expand-objs
, $($v)))))
377 # Post-process all the unnested vars
379 $(foreach o
, $(filter %.mo
,$($v)),
380 # Find all the .mo objects in variables and add dependency rules
381 # according to .mo-objs. Report error if not set
383 $(eval
$(o
:%.mo
=%$(DSOSUF
)): module-common.o
$($o-objs
)),
384 $(error
$o added in
$v but
$o-objs is not set
)))
385 $(shell mkdir
-p .
/ $(sort $(dir $($v))))
386 # Include all the .d files
387 $(eval
-include $(patsubst %.o
,%.d
,$(patsubst %.mo
,%.d
,$($v))))
388 $(eval
$v := $(filter-out %/,$($v))))
391 TEXI2MAN
= $(call quiet-command
, \
392 perl
-Ww
-- $(SRC_PATH
)/scripts
/texi2pod.pl
$(TEXI2PODFLAGS
) $< $@.pod
&& \
393 $(POD2MAN
) --section
=$(subst .
,,$(suffix $@
)) --center
=" " --release
=" " $@.pod
> $@
, \
403 GEN_SUBST
= $(call quiet-command
, \
404 sed
-e
"s!@libexecdir@!$(libexecdir)!g" < $< > $@
, \