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
23 # Flags for C++ compilation
24 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_CFLAGS
))
26 # Flags for dependency generation
27 QEMU_DGFLAGS
+= -MMD
-MP
-MT
$@
-MF
$(@D
)/$(*F
).d
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.
35 QEMU_LOCAL_INCLUDES
= -I
$(BUILD_DIR
)/$(@D
) -I
$(@D
)
38 find-symbols
= $(if
$1, $(sort $(shell $(NM
) -P
-g
$1 |
$2)))
39 defined-symbols
= $(call find-symbols
,$1,awk
'$$2!="U"{print $$1}')
40 undefined-symbols
= $(call find-symbols
,$1,awk
'$$2=="U"{print $$1}')
42 # All the .mo objects in -m variables are also added into corresponding -y
43 # variable in unnest-vars, but filtered out here, when LINK is called.
45 # The .mo objects are supposed to be linked as a DSO, for module build. So here
46 # they are only used as a placeholders to generate those "archive undefined"
47 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
48 # referenced by the code in the DSO.
50 # Also the presence in -y variables will also guarantee they are built before
51 # linking executables that will load them. So we can look up symbol reference
54 # This is necessary because the exectuable itself may not use the function, in
55 # which case the function would not be linked in. Then the DSO loading will
56 # fail because of the missing symbol.
57 process-archive-undefs
= $(filter-out %.a
%.mo
,$1) \
58 $(addprefix $(WL_U
), \
59 $(filter $(call defined-symbols
,$(filter %.a
, $1)), \
60 $(call undefined-symbols
,$(filter %.mo
,$1)))) \
63 extract-libs
= $(strip $(foreach o
,$(filter-out %.mo
,$1),$($o-libs
)))
64 expand-objs
= $(strip $(sort $(filter %.o
,$1)) \
65 $(foreach o
,$(filter %.mo
,$1),$($o-objs
)) \
66 $(filter-out %.o
%.mo
,$1))
69 $(call quiet-command
,$(CC
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
70 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
71 -c
-o
$@
$<,"CC","$(TARGET_DIR)$@")
73 $(call quiet-command
,$(WINDRES
) -I.
-o
$@
$<,"RC","$(TARGET_DIR)$@")
75 # If we have a CXX we might have some C++ objects, in which case we
76 # must link with the C++ compiler, not the plain C compiler.
77 LINKPROG
= $(or
$(CXX
),$(CC
))
79 LINK
= $(call quiet-command
, $(LINKPROG
) $(QEMU_CFLAGS
) $(CFLAGS
) $(LDFLAGS
) -o
$@ \
80 $(call process-archive-undefs
, $1) \
81 $(version-obj-y
) $(call extract-libs
,$1) $(LIBS
),"LINK","$(TARGET_DIR)$@")
84 $(call quiet-command
,$(CCAS
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
85 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) \
86 -c
-o
$@
$<,"CCAS","$(TARGET_DIR)$@")
89 $(call quiet-command
,$(CXX
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
90 $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
91 -c
-o
$@
$<,"CXX","$(TARGET_DIR)$@")
94 $(call quiet-command
,$(CXX
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
95 $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
96 -c
-o
$@
$<,"CXX","$(TARGET_DIR)$@")
99 $(call quiet-command
,$(OBJCC
) $(QEMU_LOCAL_INCLUDES
) $(QEMU_INCLUDES
) \
100 $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) \
101 -c
-o
$@
$<,"OBJC","$(TARGET_DIR)$@")
104 $(call quiet-command
,dtrace
-o
$@
-G
-s
$<,"GEN","$(TARGET_DIR)$@")
107 DSO_OBJ_CFLAGS
:= -DBUILD_DSO
109 DSO_OBJ_CFLAGS
:= -fPIC
-DBUILD_DSO
111 module-common.o
: CFLAGS
+= $(DSO_OBJ_CFLAGS
)
112 %$(DSOSUF
): LDFLAGS
+= $(LDFLAGS_SHARED
)
115 @
# Copy to build root so modules can be loaded when program started without install
116 $(if
$(findstring /,$@
),$(call quiet-command
,cp
$@
$(subst /,-,$@
),"CP","$(subst /,-,$@)"))
119 LD_REL
:= $(CC
) -nostdlib
$(LD_REL_FLAGS
)
122 $(call quiet-command
,$(LD_REL
) -o
$@
$^
,"LD","$(TARGET_DIR)$@")
128 $(call LINK
,$(filter %.o
%.a
%.mo
, $^
))
131 $(call quiet-command
,rm -f
$@
&& $(AR
) rcs
$@
$^
,"AR","$(TARGET_DIR)$@")
133 # Usage: $(call quiet-command,command and args,"NAME","args to print")
134 # This will run "command and args", and either:
135 # if V=1 just print the whole command and args
136 # otherwise print the 'quiet' output in the format " NAME args to print"
137 # NAME should be a short name of the command, 7 letters or fewer.
138 # If called with only a single argument, will print nothing in quiet mode.
139 quiet-command
= $(if
$(V
),$1,$(if
$(2),@printf
" %-7s %s\n" $2 $3 && $1, @
$1))
142 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
144 cc-option
= $(if
$(shell $(CC
) $1 $2 -S
-o
/dev
/null
-xc
/dev
/null \
145 >/dev
/null
2>&1 && echo OK
), $2, $3)
146 cc-c-option
= $(if
$(shell $(CC
) $1 $2 -c
-o
/dev
/null
-xc
/dev
/null \
147 >/dev
/null
2>&1 && echo OK
), $2, $3)
149 VPATH_SUFFIXES
= %.c
%.h
%.S
%.
cc %.
cpp %.m
%.mak
%.texi
%.sh
%.rc
150 set-vpath
= $(if
$1,$(foreach PATTERN
,$(VPATH_SUFFIXES
),$(eval vpath
$(PATTERN
) $1)))
152 # install-prog list, dir
155 $(INSTALL_PROG
) $1 "$2"
156 $(if
$(STRIP
),$(STRIP
) $(foreach T
,$1,"$2/$(notdir $T)"),)
160 # Usage: $(call find-in-path, prog)
161 # Looks in the PATH if the argument contains no slash, else only considers one
162 # specific directory. Returns an # empty string if the program doesn't exist
164 find-in-path
= $(if
$(findstring /, $1), \
166 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH
)))))
168 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
169 # Inputs to these must be either "y" (true) or "n" or "" (both false)
170 # Output is always either "y" or "n".
171 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
173 lnot
= $(if
$(subst n
,,$1),n
,y
)
175 land
= $(if
$(findstring yy
,$1$2),y
,n
)
177 lor
= $(if
$(findstring y
,$1$2),y
,n
)
178 # Logical XOR (note that this is the inverse of leqv)
179 lxor
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),n
,y
)
180 # Logical equivalence (note that leqv "","n" is true)
181 leqv
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),y
,n
)
182 # Logical if: like make's $(if) but with an leqv-like test
183 lif
= $(if
$(subst n
,,$1),$2,$3)
185 # String testing functions: inputs to these can be any string;
186 # the output is always either "y" or "n". Leading and trailing whitespace
187 # is ignored when comparing strings.
189 eq
= $(if
$(subst $2,,$1)$(subst $1,,$2),n
,y
)
191 ne
= $(if
$(subst $2,,$1)$(subst $1,,$2),y
,n
)
192 # Emptiness/non-emptiness tests:
193 isempty
= $(if
$1,n
,y
)
194 notempty
= $(if
$1,y
,n
)
196 # Generate files with tracetool
197 TRACETOOL
=$(PYTHON
) $(SRC_PATH
)/scripts
/tracetool.py
199 # Generate timestamp files for .h include files
201 config-
%.h
: config-
%.h-timestamp
202 @cmp
$< $@
>/dev
/null
2>&1 || cp
$< $@
204 config-
%.h-timestamp
: config-
%.mak
$(SRC_PATH
)/scripts
/create_config
205 $(call quiet-command
, sh
$(SRC_PATH
)/scripts
/create_config
< $< > $@
,"GEN","$(TARGET_DIR)config-$*.h")
207 .PHONY
: clean-timestamp
210 clean: clean-timestamp
212 # will delete the target of a rule if commands exit with a nonzero exit status
216 # Usage: $(call save-vars, vars)
217 # Save each variable $v in $vars as save-vars-$v, save their object's
218 # variables, then clear $v. saved-vars-$v contains the variables that
219 # where saved for the objects, in order to speedup load-vars.
222 $(eval save-vars-
$v := $(value
$v))
223 $(eval saved-vars-
$v := $(foreach o
,$($v), \
224 $(if
$($o-cflags
), $o-cflags
$(eval save-vars-
$o-cflags
:= $($o-cflags
))$(eval
$o-cflags
:= )) \
225 $(if
$($o-libs
), $o-libs
$(eval save-vars-
$o-libs
:= $($o-libs
))$(eval
$o-libs
:= )) \
226 $(if
$($o-objs
), $o-objs
$(eval save-vars-
$o-objs
:= $($o-objs
))$(eval
$o-objs
:= ))))
231 # Usage: $(call load-vars, vars, add_var)
232 # Load the saved value for each variable in @vars, and the per object
234 # Append @add_var's current value to the loaded value.
236 $(eval
$2-new-value
:= $(value
$2))
238 $(eval
$v := $(value save-vars-
$v))
239 $(foreach o
,$(saved-vars-
$v),
240 $(eval
$o := $(save-vars-
$o)) $(eval save-vars-
$o := ))
241 $(eval save-vars-
$v := )
242 $(eval saved-vars-
$v := ))
243 $(eval
$2 := $(value
$2) $($2-new-value
))
247 # Usage: $(call fix-paths, obj_path, src_path, vars)
248 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
249 # directories in @vars.
254 $(eval
$1$o-libs
:= $($o-libs
)))
256 $(eval
$1$o-cflags
:= $($o-cflags
)))
258 $(eval
$1$o-objs
:= $(addprefix $1,$($o-objs
)))))
259 $(eval
$v := $(addprefix $1,$(filter-out %/,$($v))) \
260 $(addprefix $2,$(filter %/,$($v)))))
263 # unnest-var-recursive
264 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
266 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
269 # @obj_prefix is the starting point of object path prefix.
271 define unnest-var-recursive
272 $(eval dirs
:= $(sort $(filter %/,$($3))))
273 $(eval
$3 := $(filter-out %/,$($3)))
274 $(foreach d
,$(dirs
:%/=%),
276 $(eval obj
:= $(if
$1,$1/)$d)
277 $(eval
-include $(SRC_PATH
)/$d/Makefile.objs
)
278 $(call fix-paths
,$(if
$1,$1/)$d/,$d/,$2)
279 $(call load-vars
,$2,$3)
280 $(call unnest-var-recursive
,$1,$2,$3))
284 # Usage: $(call unnest-vars, obj_prefix, vars)
286 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
289 # @vars: the list of variable names to unnest.
291 # This macro will scan subdirectories's Makefile.objs, include them, to build
292 # up each variable listed in @vars.
294 # Per object and per module cflags and libs are saved with relative path fixed
295 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
296 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
298 # All nested variables postfixed by -m in names are treated as DSO variables,
299 # and will be built as modules, if enabled.
301 # A simple example of the unnest:
305 # hot = fire.o sun.o season/
306 # cold = snow.o water/ season/
308 # Unnest through a faked source directory structure:
312 # │ └── Makefile.objs──────────────────┐
313 # │ │ hot += steam.o │
314 # │ │ cold += ice.mo │
315 # │ │ ice.mo-libs := -licemaker │
316 # │ │ ice.mo-objs := ice1.o ice2.o │
317 # │ └──────────────────────────────┘
320 # └── Makefile.objs──────┐
321 # │ hot += summer.o │
322 # │ cold += winter.o │
323 # └──────────────────┘
325 # In the end, the result will be:
327 # hot = ../fire.o ../sun.o ../season/summer.o
328 # cold = ../snow.o ../water/ice.mo ../season/winter.o
329 # ../water/ice.mo-libs = -licemaker
330 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
332 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
336 # In the case of target build (i.e. $1 == ..), fix path for top level
337 # Makefile.objs objects
338 $(if
$1,$(call fix-paths
,$1/,,$2))
340 # Descend and include every subdir Makefile.objs
342 $(call unnest-var-recursive
,$1,$2,$v)
343 # Pass the .mo-cflags and .mo-libs along to its member objects
344 $(foreach o
, $(filter %.mo
,$($v)),
345 $(foreach p
,$($o-objs
),
346 $(if
$($o-cflags
), $(eval
$p-cflags
+= $($o-cflags
)))
347 $(if
$($o-libs
), $(eval
$p-libs
+= $($o-libs
))))))
349 # For all %.mo objects that are directly added into -y, just expand them
350 $(foreach v
,$(filter %-y
,$2),
351 $(eval
$v := $(foreach o
,$($v),$(if
$($o-objs
),$($o-objs
),$o))))
353 $(foreach v
,$(filter %-m
,$2),
354 # All .o found in *-m variables are single object modules, create .mo
356 $(foreach o
,$(filter %.o
,$($v)),
357 $(eval
$(o
:%.o
=%.mo
)-objs
:= $o))
358 # Now unify .o in -m variable to .mo
359 $(eval
$v := $($v:%.o
=%.mo
))
360 $(eval modules-m
+= $($v))
362 # For module build, build shared libraries during "make modules"
363 # For non-module build, add -m to -y
364 $(if
$(CONFIG_MODULES
),
366 $(eval
$($o-objs
): CFLAGS
+= $(DSO_OBJ_CFLAGS
))
367 $(eval
$o: $($o-objs
)))
368 $(eval
$(patsubst %-m
,%-y
,$v) += $($v))
369 $(eval modules
: $($v:%.mo
=%$(DSOSUF
))),
370 $(eval
$(patsubst %-m
,%-y
,$v) += $(call expand-objs
, $($v)))))
372 # Post-process all the unnested vars
374 $(foreach o
, $(filter %.mo
,$($v)),
375 # Find all the .mo objects in variables and add dependency rules
376 # according to .mo-objs. Report error if not set
378 $(eval
$(o
:%.mo
=%$(DSOSUF
)): module-common.o
$($o-objs
)),
379 $(error
$o added in
$v but
$o-objs is not set
)))
380 $(shell mkdir
-p .
/ $(sort $(dir $($v))))
381 # Include all the .d files
382 $(eval
-include $(patsubst %.o
,%.d
,$(patsubst %.mo
,%.d
,$($v))))
383 $(eval
$v := $(filter-out %/,$($v))))
386 TEXI2MAN
= $(call quiet-command
, \
387 perl
-Ww
-- $(SRC_PATH
)/scripts
/texi2pod.pl
$< $@.pod
&& \
388 $(POD2MAN
) --section
=$(subst .
,,$(suffix $@
)) --center
=" " --release
=" " $@.pod
> $@
, \