Makefile: Rules for docker testing
[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 %.d:
11 %.h:
12 %.c:
13 %.cc:
14 %.cpp:
15 %.m:
16 %.mak:
17
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))
20
21 # Flags for dependency generation
22 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
23
24 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
25 QEMU_INCLUDES += -I$(<D) -I$(@D)
26
27 WL_U := -Wl,-u,
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}')
31
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.
34 #
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.
39 #
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
42 # in LINK.
43 #
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)))) \
51 $(filter %.a,$1)
52
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))
57
58 %.o: %.c
59 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@")
60 %.o: %.rc
61 $(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@")
62
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))
66
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 $(TARGET_DIR)$@")
70
71 %.asm: %.S
72 $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
73
74 %.o: %.asm
75 $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@")
76
77 %.o: %.cc
78 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
79
80 %.o: %.cpp
81 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
82
83 %.o: %.m
84 $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," OBJC $(TARGET_DIR)$@")
85
86 %.o: %.dtrace
87 $(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
88
89 DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
90 module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
91 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
92 %$(DSOSUF): %.mo
93 $(call LINK,$^)
94 @# Copy to build root so modules can be loaded when program started without install
95 $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)"))
96
97
98 LD_REL := $(CC) -nostdlib -Wl,-r
99
100 %.mo:
101 $(call quiet-command,$(LD_REL) -o $@ $^," LD -r $(TARGET_DIR)$@")
102
103 .PHONY: modules
104 modules:
105
106 %$(EXESUF): %.o
107 $(call LINK,$(filter %.o %.a %.mo, $^))
108
109 %.a:
110 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@")
111
112 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
113
114 # cc-option
115 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
116
117 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
118 >/dev/null 2>&1 && echo OK), $2, $3)
119
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)))
122
123 # install-prog list, dir
124 define install-prog
125 $(INSTALL_DIR) "$2"
126 $(INSTALL_PROG) $1 "$2"
127 $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
128 endef
129
130 # find-in-path
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
134 # there.
135 find-in-path = $(if $(find-string /, $1), \
136 $(wildcard $1), \
137 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
138
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))
143 # Logical NOT
144 lnot = $(if $(subst n,,$1),n,y)
145 # Logical AND
146 land = $(if $(findstring yy,$1$2),y,n)
147 # Logical OR
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)
155
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.
159 # String equality
160 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
161 # String inequality
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 $1,y,n)
166
167 # Generate files with tracetool
168 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
169
170 # Generate timestamp files for .h include files
171
172 config-%.h: config-%.h-timestamp
173 @cmp $< $@ >/dev/null 2>&1 || cp $< $@
174
175 config-%.h-timestamp: config-%.mak
176 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h")
177
178 .PHONY: clean-timestamp
179 clean-timestamp:
180 rm -f *.timestamp
181 clean: clean-timestamp
182
183 # will delete the target of a rule if commands exit with a nonzero exit status
184 .DELETE_ON_ERROR:
185
186 # save-vars
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.
190 define save-vars
191 $(foreach v,$1,
192 $(eval save-vars-$v := $(value $v))
193 $(foreach o,$($v),
194 $(foreach k,cflags libs objs,
195 $(if $($o-$k),
196 $(eval save-vars-$o-$k := $($o-$k))
197 $(eval $o-$k := ))))
198 $(eval $v := ))
199 endef
200
201 # load-vars
202 # Usage: $(call load-vars, vars, add_var)
203 # Load the saved value for each variable in @vars, and the per object
204 # variables.
205 # Append @add_var's current value to the loaded value.
206 define load-vars
207 $(eval $2-new-value := $(value $2))
208 $(foreach v,$1,
209 $(eval $v := $(value save-vars-$v))
210 $(foreach o,$($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))
217 endef
218
219 # fix-paths
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.
223 define fix-paths
224 $(foreach v,$3,
225 $(foreach o,$($v),
226 $(if $($o-libs),
227 $(eval $1$o-libs := $($o-libs)))
228 $(if $($o-cflags),
229 $(eval $1$o-cflags := $($o-cflags)))
230 $(if $($o-objs),
231 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
232 $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
233 $(addprefix $2,$(filter %/,$($v)))))
234 endef
235
236 # unnest-var-recursive
237 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
238 #
239 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
240 # unchanged.
241 #
242 # @obj_prefix is the starting point of object path prefix.
243 #
244 define unnest-var-recursive
245 $(eval dirs := $(sort $(filter %/,$($3))))
246 $(eval $3 := $(filter-out %/,$($3)))
247 $(foreach d,$(dirs:%/=%),
248 $(call save-vars,$2)
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))
254 endef
255
256 # unnest-vars
257 # Usage: $(call unnest-vars, obj_prefix, vars)
258 #
259 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
260 # ending '/'.
261 #
262 # @vars: the list of variable names to unnest.
263 #
264 # This macro will scan subdirectories's Makefile.objs, include them, to build
265 # up each variable listed in @vars.
266 #
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.
270 #
271 # All nested variables postfixed by -m in names are treated as DSO variables,
272 # and will be built as modules, if enabled.
273 #
274 # A simple example of the unnest:
275 #
276 # obj_prefix = ..
277 # vars = hot cold
278 # hot = fire.o sun.o season/
279 # cold = snow.o water/ season/
280 #
281 # Unnest through a faked source directory structure:
282 #
283 # SRC_PATH
284 # ├── water
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 # │ └──────────────────────────────┘
291 # │
292 # └── season
293 # └── Makefile.objs──────┐
294 # │ hot += summer.o │
295 # │ cold += winter.o │
296 # └──────────────────┘
297 #
298 # In the end, the result will be:
299 #
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
304 #
305 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
306 # included.
307 #
308 define unnest-vars
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))
312
313 # Descend and include every subdir Makefile.objs
314 $(foreach v, $2,
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))))))
321
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))))
325
326 $(foreach v,$(filter %-m,$2),
327 # All .o found in *-m variables are single object modules, create .mo
328 # for them
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))
334
335 # For module build, build shared libraries during "make modules"
336 # For non-module build, add -m to -y
337 $(if $(CONFIG_MODULES),
338 $(foreach o,$($v),
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)))))
344
345 # Post-process all the unnested vars
346 $(foreach v,$2,
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
350 $(if $($o-objs),
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))))
357 endef