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
18 # Flags for C++ compilation
19 QEMU_CXXFLAGS
= -D__STDC_LIMIT_MACROS
$(filter-out -Wstrict-prototypes
-Wmissing-prototypes
-Wnested-externs
-Wold-style-declaration
-Wold-style-definition
-Wredundant-decls
, $(QEMU_CFLAGS
))
21 # Flags for dependency generation
22 QEMU_DGFLAGS
+= -MMD
-MP
-MT
$@
-MF
$(@D
)/$(*F
).d
24 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
25 QEMU_INCLUDES
+= -I
$(<D
) -I
$(@D
)
28 find-symbols
= $(if
$1, $(sort $(shell $(NM
) -P
-g
$1 |
$2)))
29 defined-symbols
= $(call find-symbols
,$1,awk
'$$2!="U"{print $$1}')
30 undefined-symbols
= $(call find-symbols
,$1,awk
'$$2=="U"{print $$1}')
32 # All the .mo objects in -m variables are also added into corresponding -y
33 # variable in unnest-vars, but filtered out here, when LINK is called.
35 # The .mo objects are supposed to be linked as a DSO, for module build. So here
36 # they are only used as a placeholders to generate those "archive undefined"
37 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
38 # referenced by the code in the DSO.
40 # Also the presence in -y variables will also guarantee they are built before
41 # linking executables that will load them. So we can look up symbol reference
44 # This is necessary because the exectuable itself may not use the function, in
45 # which case the function would not be linked in. Then the DSO loading will
46 # fail because of the missing symbol.
47 process-archive-undefs
= $(filter-out %.a
%.mo
,$1) \
48 $(addprefix $(WL_U
), \
49 $(filter $(call defined-symbols
,$(filter %.a
, $1)), \
50 $(call undefined-symbols
,$(filter %.mo
,$1)))) \
53 extract-libs
= $(strip $(foreach o
,$1,$($o-libs
)))
54 expand-objs
= $(strip $(sort $(filter %.o
,$1)) \
55 $(foreach o
,$(filter %.mo
,$1),$($o-objs
)) \
56 $(filter-out %.o
%.mo
,$1))
59 $(call quiet-command
,$(CC
) $(QEMU_INCLUDES
) $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) -c
-o
$@
$<," CC $(TARGET_DIR)$@")
61 $(call quiet-command
,$(WINDRES
) -I.
-o
$@
$<," RC $(TARGET_DIR)$@")
63 # If we have a CXX we might have some C++ objects, in which case we
64 # must link with the C++ compiler, not the plain C compiler.
65 LINKPROG
= $(or
$(CXX
),$(CC
))
67 LINK
= $(call quiet-command
, $(LINKPROG
) $(QEMU_CFLAGS
) $(CFLAGS
) $(LDFLAGS
) -o
$@ \
68 $(call process-archive-undefs
, $1) \
69 $(version-obj-y
) $(call extract-libs
,$1) $(LIBS
)," LINK $(TARGET_DIR)$@")
72 $(call quiet-command
,$(CPP
) $(QEMU_INCLUDES
) $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) -o
$@
$<," CPP $(TARGET_DIR)$@")
75 $(call quiet-command
,$(AS
) $(ASFLAGS
) -o
$@
$<," AS $(TARGET_DIR)$@")
78 $(call quiet-command
,$(CXX
) $(QEMU_INCLUDES
) $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) -c
-o
$@
$<," CXX $(TARGET_DIR)$@")
81 $(call quiet-command
,$(CXX
) $(QEMU_INCLUDES
) $(QEMU_CXXFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) -c
-o
$@
$<," CXX $(TARGET_DIR)$@")
84 $(call quiet-command
,$(OBJCC
) $(QEMU_INCLUDES
) $(QEMU_CFLAGS
) $(QEMU_DGFLAGS
) $(CFLAGS
) $($@
-cflags) -c
-o
$@
$<," OBJC $(TARGET_DIR)$@")
87 $(call quiet-command
,dtrace
-o
$@
-G
-s
$<, " GEN $(TARGET_DIR)$@")
89 DSO_OBJ_CFLAGS
:= -fPIC
-DBUILD_DSO
90 module-common.o
: CFLAGS
+= $(DSO_OBJ_CFLAGS
)
91 %$(DSOSUF
): LDFLAGS
+= $(LDFLAGS_SHARED
)
94 @
# Copy to build root so modules can be loaded when program started without install
95 $(if
$(findstring /,$@
),$(call quiet-command
,cp
$@
$(subst /,-,$@
), " CP $(subst /,-,$@)"))
98 LD_REL
:= $(CC
) -nostdlib
-Wl
,-r
$(LD_REL_FLAGS
)
101 $(call quiet-command
,$(LD_REL
) -o
$@
$^
," LD -r $(TARGET_DIR)$@")
107 $(call LINK
,$(filter %.o
%.a
%.mo
, $^
))
110 $(call quiet-command
,rm -f
$@
&& $(AR
) rcs
$@
$^
," AR $(TARGET_DIR)$@")
112 quiet-command
= $(if
$(V
),$1,$(if
$(2),@echo
$2 && $1, @
$1))
115 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
117 cc-option
= $(if
$(shell $(CC
) $1 $2 -S
-o
/dev
/null
-xc
/dev
/null \
118 >/dev
/null
2>&1 && echo OK
), $2, $3)
120 VPATH_SUFFIXES
= %.c
%.h
%.S
%.
cc %.
cpp %.m
%.mak
%.texi
%.sh
%.rc
121 set-vpath
= $(if
$1,$(foreach PATTERN
,$(VPATH_SUFFIXES
),$(eval vpath
$(PATTERN
) $1)))
123 # install-prog list, dir
126 $(INSTALL_PROG
) $1 "$2"
127 $(if
$(STRIP
),$(STRIP
) $(foreach T
,$1,"$2/$(notdir $T)"),)
131 # Usage: $(call find-in-path, prog)
132 # Looks in the PATH if the argument contains no slash, else only considers one
133 # specific directory. Returns an # empty string if the program doesn't exist
135 find-in-path
= $(if
$(find-string
/, $1), \
137 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH
)))))
139 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
140 # Inputs to these must be either "y" (true) or "n" or "" (both false)
141 # Output is always either "y" or "n".
142 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
144 lnot
= $(if
$(subst n
,,$1),n
,y
)
146 land
= $(if
$(findstring yy
,$1$2),y
,n
)
148 lor
= $(if
$(findstring y
,$1$2),y
,n
)
149 # Logical XOR (note that this is the inverse of leqv)
150 lxor
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),n
,y
)
151 # Logical equivalence (note that leqv "","n" is true)
152 leqv
= $(if
$(filter $(call lnot
,$1),$(call lnot
,$2)),y
,n
)
153 # Logical if: like make's $(if) but with an leqv-like test
154 lif
= $(if
$(subst n
,,$1),$2,$3)
156 # String testing functions: inputs to these can be any string;
157 # the output is always either "y" or "n". Leading and trailing whitespace
158 # is ignored when comparing strings.
160 eq
= $(if
$(subst $2,,$1)$(subst $1,,$2),n
,y
)
162 ne
= $(if
$(subst $2,,$1)$(subst $1,,$2),y
,n
)
163 # Emptiness/non-emptiness tests:
164 isempty
= $(if
$1,n
,y
)
165 notempty
= $(if
$1,y
,n
)
167 # Generate files with tracetool
168 TRACETOOL
=$(PYTHON
) $(SRC_PATH
)/scripts
/tracetool.py
170 # Generate timestamp files for .h include files
172 config-
%.h
: config-
%.h-timestamp
173 @cmp
$< $@
>/dev
/null
2>&1 || cp
$< $@
175 config-
%.h-timestamp
: config-
%.mak
176 $(call quiet-command
, sh
$(SRC_PATH
)/scripts
/create_config
< $< > $@
, " GEN $(TARGET_DIR)config-$*.h")
178 .PHONY
: clean-timestamp
181 clean: clean-timestamp
183 # will delete the target of a rule if commands exit with a nonzero exit status
187 # Usage: $(call save-vars, vars)
188 # Save each variable $v in $vars as save-vars-$v, save their object's
189 # variables, then clear $v.
192 $(eval save-vars-
$v := $(value
$v))
194 $(foreach k
,cflags libs objs
,
196 $(eval save-vars-
$o-$k := $($o-$k))
202 # Usage: $(call load-vars, vars, add_var)
203 # Load the saved value for each variable in @vars, and the per object
205 # Append @add_var's current value to the loaded value.
207 $(eval
$2-new-value
:= $(value
$2))
209 $(eval
$v := $(value save-vars-
$v))
211 $(foreach k
,cflags libs objs
,
212 $(if
$(save-vars-
$o-$k),
213 $(eval
$o-$k := $(save-vars-
$o-$k))
214 $(eval save-vars-
$o-$k := ))))
215 $(eval save-vars-
$v := ))
216 $(eval
$2 := $(value
$2) $($2-new-value
))
220 # Usage: $(call fix-paths, obj_path, src_path, vars)
221 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
222 # directories in @vars.
227 $(eval
$1$o-libs
:= $($o-libs
)))
229 $(eval
$1$o-cflags
:= $($o-cflags
)))
231 $(eval
$1$o-objs
:= $(addprefix $1,$($o-objs
)))))
232 $(eval
$v := $(addprefix $1,$(filter-out %/,$($v))) \
233 $(addprefix $2,$(filter %/,$($v)))))
236 # unnest-var-recursive
237 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
239 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
242 # @obj_prefix is the starting point of object path prefix.
244 define unnest-var-recursive
245 $(eval dirs
:= $(sort $(filter %/,$($3))))
246 $(eval
$3 := $(filter-out %/,$($3)))
247 $(foreach d
,$(dirs
:%/=%),
249 $(eval obj
:= $(if
$1,$1/)$d)
250 $(eval
-include $(SRC_PATH
)/$d/Makefile.objs
)
251 $(call fix-paths
,$(if
$1,$1/)$d/,$d/,$2)
252 $(call load-vars
,$2,$3)
253 $(call unnest-var-recursive
,$1,$2,$3))
257 # Usage: $(call unnest-vars, obj_prefix, vars)
259 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
262 # @vars: the list of variable names to unnest.
264 # This macro will scan subdirectories's Makefile.objs, include them, to build
265 # up each variable listed in @vars.
267 # Per object and per module cflags and libs are saved with relative path fixed
268 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
269 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
271 # All nested variables postfixed by -m in names are treated as DSO variables,
272 # and will be built as modules, if enabled.
274 # A simple example of the unnest:
278 # hot = fire.o sun.o season/
279 # cold = snow.o water/ season/
281 # Unnest through a faked source directory structure:
285 # │ └── Makefile.objs──────────────────┐
286 # │ │ hot += steam.o │
287 # │ │ cold += ice.mo │
288 # │ │ ice.mo-libs := -licemaker │
289 # │ │ ice.mo-objs := ice1.o ice2.o │
290 # │ └──────────────────────────────┘
293 # └── Makefile.objs──────┐
294 # │ hot += summer.o │
295 # │ cold += winter.o │
296 # └──────────────────┘
298 # In the end, the result will be:
300 # hot = ../fire.o ../sun.o ../season/summer.o
301 # cold = ../snow.o ../water/ice.mo ../season/winter.o
302 # ../water/ice.mo-libs = -licemaker
303 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
305 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
309 # In the case of target build (i.e. $1 == ..), fix path for top level
310 # Makefile.objs objects
311 $(if
$1,$(call fix-paths
,$1/,,$2))
313 # Descend and include every subdir Makefile.objs
315 $(call unnest-var-recursive
,$1,$2,$v)
316 # Pass the .mo-cflags and .mo-libs along to its member objects
317 $(foreach o
, $(filter %.mo
,$($v)),
318 $(foreach p
,$($o-objs
),
319 $(if
$($o-cflags
), $(eval
$p-cflags
+= $($o-cflags
)))
320 $(if
$($o-libs
), $(eval
$p-libs
+= $($o-libs
))))))
322 # For all %.mo objects that are directly added into -y, just expand them
323 $(foreach v
,$(filter %-y
,$2),
324 $(eval
$v := $(foreach o
,$($v),$(if
$($o-objs
),$($o-objs
),$o))))
326 $(foreach v
,$(filter %-m
,$2),
327 # All .o found in *-m variables are single object modules, create .mo
329 $(foreach o
,$(filter %.o
,$($v)),
330 $(eval
$(o
:%.o
=%.mo
)-objs
:= $o))
331 # Now unify .o in -m variable to .mo
332 $(eval
$v := $($v:%.o
=%.mo
))
333 $(eval modules-m
+= $($v))
335 # For module build, build shared libraries during "make modules"
336 # For non-module build, add -m to -y
337 $(if
$(CONFIG_MODULES
),
339 $(eval
$($o-objs
): CFLAGS
+= $(DSO_OBJ_CFLAGS
))
340 $(eval
$o: $($o-objs
)))
341 $(eval
$(patsubst %-m
,%-y
,$v) += $($v))
342 $(eval modules
: $($v:%.mo
=%$(DSOSUF
))),
343 $(eval
$(patsubst %-m
,%-y
,$v) += $(call expand-objs
, $($v)))))
345 # Post-process all the unnested vars
347 $(foreach o
, $(filter %.mo
,$($v)),
348 # Find all the .mo objects in variables and add dependency rules
349 # according to .mo-objs. Report error if not set
351 $(eval
$(o
:%.mo
=%$(DSOSUF
)): module-common.o
$($o-objs
)),
352 $(error
$o added in
$v but
$o-objs is not set
)))
353 $(shell mkdir
-p .
/ $(sort $(dir $($v))))
354 # Include all the .d files
355 $(eval
-include $(patsubst %.o
,%.d
,$(patsubst %.mo
,%.d
,$($v))))
356 $(eval
$v := $(filter-out %/,$($v))))