quorum: Inline quorum_aio_cb()
[qemu.git] / rules.mak
1
2 COMMA := ,
3
4 # Don't use implicit rules or variables
5 # we have explicit rules for everything
6 MAKEFLAGS += -rR
7
8 # Files with this suffixes are final, don't try to generate them
9 # using implicit rules
10 %/trace-events:
11 %.hx:
12 %.py:
13 %.objs:
14 %.d:
15 %.h:
16 %.c:
17 %.cc:
18 %.cpp:
19 %.m:
20 %.mak:
21 clean-target:
22
23 # Flags for C++ compilation
24 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
25
26 # Flags for dependency generation
27 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
28
29 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
30 QEMU_INCLUDES += -I$(<D) -I$(@D)
31
32 WL_U := -Wl,-u,
33 find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
34 defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
35 undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
36
37 # All the .mo objects in -m variables are also added into corresponding -y
38 # variable in unnest-vars, but filtered out here, when LINK is called.
39 #
40 # The .mo objects are supposed to be linked as a DSO, for module build. So here
41 # they are only used as a placeholders to generate those "archive undefined"
42 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
43 # referenced by the code in the DSO.
44 #
45 # Also the presence in -y variables will also guarantee they are built before
46 # linking executables that will load them. So we can look up symbol reference
47 # in LINK.
48 #
49 # This is necessary because the exectuable itself may not use the function, in
50 # which case the function would not be linked in. Then the DSO loading will
51 # fail because of the missing symbol.
52 process-archive-undefs = $(filter-out %.a %.mo,$1) \
53 $(addprefix $(WL_U), \
54 $(filter $(call defined-symbols,$(filter %.a, $1)), \
55 $(call undefined-symbols,$(filter %.mo,$1)))) \
56 $(filter %.a,$1)
57
58 extract-libs = $(strip $(foreach o,$(filter-out %.mo,$1),$($o-libs)))
59 expand-objs = $(strip $(sort $(filter %.o,$1)) \
60 $(foreach o,$(filter %.mo,$1),$($o-objs)) \
61 $(filter-out %.o %.mo,$1))
62
63 %.o: %.c
64 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CC","$(TARGET_DIR)$@")
65 %.o: %.rc
66 $(call quiet-command,$(WINDRES) -I. -o $@ $<,"RC","$(TARGET_DIR)$@")
67
68 # If we have a CXX we might have some C++ objects, in which case we
69 # must link with the C++ compiler, not the plain C compiler.
70 LINKPROG = $(or $(CXX),$(CC))
71
72 LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
73 $(call process-archive-undefs, $1) \
74 $(version-obj-y) $(call extract-libs,$1) $(LIBS),"LINK","$(TARGET_DIR)$@")
75
76 %.o: %.S
77 $(call quiet-command,$(CCAS) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"CCAS","$(TARGET_DIR)$@")
78
79 %.o: %.cc
80 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
81
82 %.o: %.cpp
83 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"CXX","$(TARGET_DIR)$@")
84
85 %.o: %.m
86 $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<,"OBJC","$(TARGET_DIR)$@")
87
88 %.o: %.dtrace
89 $(call quiet-command,dtrace -o $@ -G -s $<,"GEN","$(TARGET_DIR)$@")
90
91 DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
92 module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
93 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
94 %$(DSOSUF): %.mo
95 $(call LINK,$^)
96 @# Copy to build root so modules can be loaded when program started without install
97 $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@),"CP","$(subst /,-,$@)"))
98
99
100 LD_REL := $(CC) -nostdlib $(LD_REL_FLAGS)
101
102 %.mo:
103 $(call quiet-command,$(LD_REL) -o $@ $^,"LD","$(TARGET_DIR)$@")
104
105 .PHONY: modules
106 modules:
107
108 %$(EXESUF): %.o
109 $(call LINK,$(filter %.o %.a %.mo, $^))
110
111 %.a:
112 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^,"AR","$(TARGET_DIR)$@")
113
114 # Usage: $(call quiet-command,command and args,"NAME","args to print")
115 # This will run "command and args", and either:
116 # if V=1 just print the whole command and args
117 # otherwise print the 'quiet' output in the format " NAME args to print"
118 # NAME should be a short name of the command, 7 letters or fewer.
119 # If called with only a single argument, will print nothing in quiet mode.
120 quiet-command = $(if $(V),$1,$(if $(2),@printf " %-7s %s\n" $2 $3 && $1, @$1))
121
122 # cc-option
123 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
124
125 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
126 >/dev/null 2>&1 && echo OK), $2, $3)
127 cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
128 >/dev/null 2>&1 && echo OK), $2, $3)
129
130 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
131 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
132
133 # install-prog list, dir
134 define install-prog
135 $(INSTALL_DIR) "$2"
136 $(INSTALL_PROG) $1 "$2"
137 $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
138 endef
139
140 # find-in-path
141 # Usage: $(call find-in-path, prog)
142 # Looks in the PATH if the argument contains no slash, else only considers one
143 # specific directory. Returns an # empty string if the program doesn't exist
144 # there.
145 find-in-path = $(if $(findstring /, $1), \
146 $(wildcard $1), \
147 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
148
149 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
150 # Inputs to these must be either "y" (true) or "n" or "" (both false)
151 # Output is always either "y" or "n".
152 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
153 # Logical NOT
154 lnot = $(if $(subst n,,$1),n,y)
155 # Logical AND
156 land = $(if $(findstring yy,$1$2),y,n)
157 # Logical OR
158 lor = $(if $(findstring y,$1$2),y,n)
159 # Logical XOR (note that this is the inverse of leqv)
160 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
161 # Logical equivalence (note that leqv "","n" is true)
162 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
163 # Logical if: like make's $(if) but with an leqv-like test
164 lif = $(if $(subst n,,$1),$2,$3)
165
166 # String testing functions: inputs to these can be any string;
167 # the output is always either "y" or "n". Leading and trailing whitespace
168 # is ignored when comparing strings.
169 # String equality
170 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
171 # String inequality
172 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
173 # Emptiness/non-emptiness tests:
174 isempty = $(if $1,n,y)
175 notempty = $(if $1,y,n)
176
177 # Generate files with tracetool
178 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
179
180 # Generate timestamp files for .h include files
181
182 config-%.h: config-%.h-timestamp
183 @cmp $< $@ >/dev/null 2>&1 || cp $< $@
184
185 config-%.h-timestamp: config-%.mak $(SRC_PATH)/scripts/create_config
186 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@,"GEN","$(TARGET_DIR)config-$*.h")
187
188 .PHONY: clean-timestamp
189 clean-timestamp:
190 rm -f *.timestamp
191 clean: clean-timestamp
192
193 # will delete the target of a rule if commands exit with a nonzero exit status
194 .DELETE_ON_ERROR:
195
196 # save-vars
197 # Usage: $(call save-vars, vars)
198 # Save each variable $v in $vars as save-vars-$v, save their object's
199 # variables, then clear $v. saved-vars-$v contains the variables that
200 # where saved for the objects, in order to speedup load-vars.
201 define save-vars
202 $(foreach v,$1,
203 $(eval save-vars-$v := $(value $v))
204 $(eval saved-vars-$v := $(foreach o,$($v), \
205 $(if $($o-cflags), $o-cflags $(eval save-vars-$o-cflags := $($o-cflags))$(eval $o-cflags := )) \
206 $(if $($o-libs), $o-libs $(eval save-vars-$o-libs := $($o-libs))$(eval $o-libs := )) \
207 $(if $($o-objs), $o-objs $(eval save-vars-$o-objs := $($o-objs))$(eval $o-objs := ))))
208 $(eval $v := ))
209 endef
210
211 # load-vars
212 # Usage: $(call load-vars, vars, add_var)
213 # Load the saved value for each variable in @vars, and the per object
214 # variables.
215 # Append @add_var's current value to the loaded value.
216 define load-vars
217 $(eval $2-new-value := $(value $2))
218 $(foreach v,$1,
219 $(eval $v := $(value save-vars-$v))
220 $(foreach o,$(saved-vars-$v),
221 $(eval $o := $(save-vars-$o)) $(eval save-vars-$o := ))
222 $(eval save-vars-$v := )
223 $(eval saved-vars-$v := ))
224 $(eval $2 := $(value $2) $($2-new-value))
225 endef
226
227 # fix-paths
228 # Usage: $(call fix-paths, obj_path, src_path, vars)
229 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
230 # directories in @vars.
231 define fix-paths
232 $(foreach v,$3,
233 $(foreach o,$($v),
234 $(if $($o-libs),
235 $(eval $1$o-libs := $($o-libs)))
236 $(if $($o-cflags),
237 $(eval $1$o-cflags := $($o-cflags)))
238 $(if $($o-objs),
239 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
240 $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
241 $(addprefix $2,$(filter %/,$($v)))))
242 endef
243
244 # unnest-var-recursive
245 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
246 #
247 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
248 # unchanged.
249 #
250 # @obj_prefix is the starting point of object path prefix.
251 #
252 define unnest-var-recursive
253 $(eval dirs := $(sort $(filter %/,$($3))))
254 $(eval $3 := $(filter-out %/,$($3)))
255 $(foreach d,$(dirs:%/=%),
256 $(call save-vars,$2)
257 $(eval obj := $(if $1,$1/)$d)
258 $(eval -include $(SRC_PATH)/$d/Makefile.objs)
259 $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
260 $(call load-vars,$2,$3)
261 $(call unnest-var-recursive,$1,$2,$3))
262 endef
263
264 # unnest-vars
265 # Usage: $(call unnest-vars, obj_prefix, vars)
266 #
267 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
268 # ending '/'.
269 #
270 # @vars: the list of variable names to unnest.
271 #
272 # This macro will scan subdirectories's Makefile.objs, include them, to build
273 # up each variable listed in @vars.
274 #
275 # Per object and per module cflags and libs are saved with relative path fixed
276 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
277 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
278 #
279 # All nested variables postfixed by -m in names are treated as DSO variables,
280 # and will be built as modules, if enabled.
281 #
282 # A simple example of the unnest:
283 #
284 # obj_prefix = ..
285 # vars = hot cold
286 # hot = fire.o sun.o season/
287 # cold = snow.o water/ season/
288 #
289 # Unnest through a faked source directory structure:
290 #
291 # SRC_PATH
292 # ├── water
293 # │ └── Makefile.objs──────────────────┐
294 # │ │ hot += steam.o │
295 # │ │ cold += ice.mo │
296 # │ │ ice.mo-libs := -licemaker │
297 # │ │ ice.mo-objs := ice1.o ice2.o │
298 # │ └──────────────────────────────┘
299 # │
300 # └── season
301 # └── Makefile.objs──────┐
302 # │ hot += summer.o │
303 # │ cold += winter.o │
304 # └──────────────────┘
305 #
306 # In the end, the result will be:
307 #
308 # hot = ../fire.o ../sun.o ../season/summer.o
309 # cold = ../snow.o ../water/ice.mo ../season/winter.o
310 # ../water/ice.mo-libs = -licemaker
311 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
312 #
313 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
314 # included.
315 #
316 define unnest-vars
317 # In the case of target build (i.e. $1 == ..), fix path for top level
318 # Makefile.objs objects
319 $(if $1,$(call fix-paths,$1/,,$2))
320
321 # Descend and include every subdir Makefile.objs
322 $(foreach v, $2,
323 $(call unnest-var-recursive,$1,$2,$v)
324 # Pass the .mo-cflags and .mo-libs along to its member objects
325 $(foreach o, $(filter %.mo,$($v)),
326 $(foreach p,$($o-objs),
327 $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
328 $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
329
330 # For all %.mo objects that are directly added into -y, just expand them
331 $(foreach v,$(filter %-y,$2),
332 $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
333
334 $(foreach v,$(filter %-m,$2),
335 # All .o found in *-m variables are single object modules, create .mo
336 # for them
337 $(foreach o,$(filter %.o,$($v)),
338 $(eval $(o:%.o=%.mo)-objs := $o))
339 # Now unify .o in -m variable to .mo
340 $(eval $v := $($v:%.o=%.mo))
341 $(eval modules-m += $($v))
342
343 # For module build, build shared libraries during "make modules"
344 # For non-module build, add -m to -y
345 $(if $(CONFIG_MODULES),
346 $(foreach o,$($v),
347 $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
348 $(eval $o: $($o-objs)))
349 $(eval $(patsubst %-m,%-y,$v) += $($v))
350 $(eval modules: $($v:%.mo=%$(DSOSUF))),
351 $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
352
353 # Post-process all the unnested vars
354 $(foreach v,$2,
355 $(foreach o, $(filter %.mo,$($v)),
356 # Find all the .mo objects in variables and add dependency rules
357 # according to .mo-objs. Report error if not set
358 $(if $($o-objs),
359 $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
360 $(error $o added in $v but $o-objs is not set)))
361 $(shell mkdir -p ./ $(sort $(dir $($v))))
362 # Include all the .d files
363 $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$($v))))
364 $(eval $v := $(filter-out %/,$($v))))
365 endef