hw/net: fix mcf_fec driver receiver
[qemu.git] / rules.mak
1
2 # Don't use implicit rules or variables
3 # we have explicit rules for everything
4 MAKEFLAGS += -rR
5
6 # Files with this suffixes are final, don't try to generate them
7 # using implicit rules
8 %.d:
9 %.h:
10 %.c:
11 %.cc:
12 %.cpp:
13 %.m:
14 %.mak:
15
16 # Flags for C++ compilation
17 QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
18
19 # Flags for dependency generation
20 QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
21
22 # Same as -I$(SRC_PATH) -I., but for the nested source/object directories
23 QEMU_INCLUDES += -I$(<D) -I$(@D)
24
25 WL_U := -Wl,-u,
26 find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
27 defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
28 undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
29
30 # All the .mo objects in -m variables are also added into corresponding -y
31 # variable in unnest-vars, but filtered out here, when LINK is called.
32 #
33 # The .mo objects are supposed to be linked as a DSO, for module build. So here
34 # they are only used as a placeholders to generate those "archive undefined"
35 # symbol options (-Wl,-u,$symbol_name), which are the archive functions
36 # referenced by the code in the DSO.
37 #
38 # Also the presence in -y variables will also guarantee they are built before
39 # linking executables that will load them. So we can look up symbol reference
40 # in LINK.
41 #
42 # This is necessary because the exectuable itself may not use the function, in
43 # which case the function would not be linked in. Then the DSO loading will
44 # fail because of the missing symbol.
45 process-archive-undefs = $(filter-out %.a %.mo,$1) \
46 $(addprefix $(WL_U), \
47 $(filter $(call defined-symbols,$(filter %.a, $1)), \
48 $(call undefined-symbols,$(filter %.mo,$1)))) \
49 $(filter %.a,$1)
50
51 extract-libs = $(strip $(foreach o,$1,$($o-libs)))
52 expand-objs = $(strip $(sort $(filter %.o,$1)) \
53 $(foreach o,$(filter %.mo,$1),$($o-objs)) \
54 $(filter-out %.o %.mo,$1))
55
56 %.o: %.c
57 $(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@")
58 %.o: %.rc
59 $(call quiet-command,$(WINDRES) -I. -o $@ $<," RC $(TARGET_DIR)$@")
60
61 # If we have a CXX we might have some C++ objects, in which case we
62 # must link with the C++ compiler, not the plain C compiler.
63 LINKPROG = $(or $(CXX),$(CC))
64
65 ifeq ($(LIBTOOL),)
66 LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
67 $(call process-archive-undefs, $1) \
68 $(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
69 else
70 LIBTOOL += $(if $(V),,--quiet)
71 %.lo: %.c
72 $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($*.o-cflags) -c -o $@ $<," lt CC $@")
73 %.lo: %.rc
74 $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC $(TARGET_DIR)$@")
75 %.lo: %.dtrace
76 $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
77
78 LINK = $(call quiet-command,\
79 $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
80 )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
81 $(call process-archive-undefs, $1)\
82 $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
83 $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
84 $(call extract-libs,$(1:.lo=.o)) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
85 endif
86
87 %.asm: %.S
88 $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
89
90 %.o: %.asm
91 $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@")
92
93 %.o: %.cc
94 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
95
96 %.o: %.cpp
97 $(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
98
99 %.o: %.m
100 $(call quiet-command,$(OBJCC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," OBJC $(TARGET_DIR)$@")
101
102 %.o: %.dtrace
103 $(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
104
105 DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
106 module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
107 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
108 %$(DSOSUF): %.mo
109 $(call LINK,$^)
110 @# Copy to build root so modules can be loaded when program started without install
111 $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)"))
112
113
114 LD_REL := $(CC) -nostdlib -Wl,-r
115
116 %.mo:
117 $(call quiet-command,$(LD_REL) -o $@ $^," LD -r $(TARGET_DIR)$@")
118
119 .PHONY: modules
120 modules:
121
122 %$(EXESUF): %.o
123 $(call LINK,$^)
124
125 %.a:
126 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@")
127
128 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
129
130 # cc-option
131 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
132
133 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
134 >/dev/null 2>&1 && echo OK), $2, $3)
135
136 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
137 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
138
139 # install-prog list, dir
140 define install-prog
141 $(INSTALL_DIR) "$2"
142 $(INSTALL_PROG) $1 "$2"
143 $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
144 endef
145
146 # find-in-path
147 # Usage: $(call find-in-path, prog)
148 # Looks in the PATH if the argument contains no slash, else only considers one
149 # specific directory. Returns an # empty string if the program doesn't exist
150 # there.
151 find-in-path = $(if $(find-string /, $1), \
152 $(wildcard $1), \
153 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
154
155 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
156 # Inputs to these must be either "y" (true) or "n" or "" (both false)
157 # Output is always either "y" or "n".
158 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
159 # Logical NOT
160 lnot = $(if $(subst n,,$1),n,y)
161 # Logical AND
162 land = $(if $(findstring yy,$1$2),y,n)
163 # Logical OR
164 lor = $(if $(findstring y,$1$2),y,n)
165 # Logical XOR (note that this is the inverse of leqv)
166 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
167 # Logical equivalence (note that leqv "","n" is true)
168 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
169 # Logical if: like make's $(if) but with an leqv-like test
170 lif = $(if $(subst n,,$1),$2,$3)
171
172 # String testing functions: inputs to these can be any string;
173 # the output is always either "y" or "n". Leading and trailing whitespace
174 # is ignored when comparing strings.
175 # String equality
176 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
177 # String inequality
178 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
179 # Emptiness/non-emptiness tests:
180 isempty = $(if $1,n,y)
181 notempty = $(if $1,y,n)
182
183 # Generate files with tracetool
184 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
185
186 # Generate timestamp files for .h include files
187
188 config-%.h: config-%.h-timestamp
189 @cmp $< $@ >/dev/null 2>&1 || cp $< $@
190
191 config-%.h-timestamp: config-%.mak
192 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h")
193
194 .PHONY: clean-timestamp
195 clean-timestamp:
196 rm -f *.timestamp
197 clean: clean-timestamp
198
199 # will delete the target of a rule if commands exit with a nonzero exit status
200 .DELETE_ON_ERROR:
201
202 # save-vars
203 # Usage: $(call save-vars, vars)
204 # Save each variable $v in $vars as save-vars-$v, save their object's
205 # variables, then clear $v.
206 define save-vars
207 $(foreach v,$1,
208 $(eval save-vars-$v := $(value $v))
209 $(foreach o,$($v),
210 $(foreach k,cflags libs objs,
211 $(if $($o-$k),
212 $(eval save-vars-$o-$k := $($o-$k))
213 $(eval $o-$k := ))))
214 $(eval $v := ))
215 endef
216
217 # load-vars
218 # Usage: $(call load-vars, vars, add_var)
219 # Load the saved value for each variable in @vars, and the per object
220 # variables.
221 # Append @add_var's current value to the loaded value.
222 define load-vars
223 $(eval $2-new-value := $(value $2))
224 $(foreach v,$1,
225 $(eval $v := $(value save-vars-$v))
226 $(foreach o,$($v),
227 $(foreach k,cflags libs objs,
228 $(if $(save-vars-$o-$k),
229 $(eval $o-$k := $(save-vars-$o-$k))
230 $(eval save-vars-$o-$k := ))))
231 $(eval save-vars-$v := ))
232 $(eval $2 := $(value $2) $($2-new-value))
233 endef
234
235 # fix-paths
236 # Usage: $(call fix-paths, obj_path, src_path, vars)
237 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
238 # directories in @vars.
239 define fix-paths
240 $(foreach v,$3,
241 $(foreach o,$($v),
242 $(if $($o-libs),
243 $(eval $1$o-libs := $($o-libs)))
244 $(if $($o-cflags),
245 $(eval $1$o-cflags := $($o-cflags)))
246 $(if $($o-objs),
247 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
248 $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
249 $(addprefix $2,$(filter %/,$($v)))))
250 endef
251
252 # unnest-var-recursive
253 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
254 #
255 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
256 # unchanged.
257 #
258 # @obj_prefix is the starting point of object path prefix.
259 #
260 define unnest-var-recursive
261 $(eval dirs := $(sort $(filter %/,$($3))))
262 $(eval $3 := $(filter-out %/,$($3)))
263 $(foreach d,$(dirs:%/=%),
264 $(call save-vars,$2)
265 $(eval obj := $(if $1,$1/)$d)
266 $(eval -include $(SRC_PATH)/$d/Makefile.objs)
267 $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
268 $(call load-vars,$2,$3)
269 $(call unnest-var-recursive,$1,$2,$3))
270 endef
271
272 # unnest-vars
273 # Usage: $(call unnest-vars, obj_prefix, vars)
274 #
275 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
276 # ending '/'.
277 #
278 # @vars: the list of variable names to unnest.
279 #
280 # This macro will scan subdirectories's Makefile.objs, include them, to build
281 # up each variable listed in @vars.
282 #
283 # Per object and per module cflags and libs are saved with relative path fixed
284 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
285 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
286 #
287 # All nested variables postfixed by -m in names are treated as DSO variables,
288 # and will be built as modules, if enabled.
289 #
290 # A simple example of the unnest:
291 #
292 # obj_prefix = ..
293 # vars = hot cold
294 # hot = fire.o sun.o season/
295 # cold = snow.o water/ season/
296 #
297 # Unnest through a faked source directory structure:
298 #
299 # SRC_PATH
300 # ├── water
301 # │ └── Makefile.objs──────────────────┐
302 # │ │ hot += steam.o │
303 # │ │ cold += ice.mo │
304 # │ │ ice.mo-libs := -licemaker │
305 # │ │ ice.mo-objs := ice1.o ice2.o │
306 # │ └──────────────────────────────┘
307 # │
308 # └── season
309 # └── Makefile.objs──────┐
310 # │ hot += summer.o │
311 # │ cold += winter.o │
312 # └──────────────────┘
313 #
314 # In the end, the result will be:
315 #
316 # hot = ../fire.o ../sun.o ../season/summer.o
317 # cold = ../snow.o ../water/ice.mo ../season/winter.o
318 # ../water/ice.mo-libs = -licemaker
319 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
320 #
321 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
322 # included.
323 #
324 define unnest-vars
325 # In the case of target build (i.e. $1 == ..), fix path for top level
326 # Makefile.objs objects
327 $(if $1,$(call fix-paths,$1/,,$2))
328
329 # Descend and include every subdir Makefile.objs
330 $(foreach v, $2,
331 $(call unnest-var-recursive,$1,$2,$v)
332 # Pass the .mo-cflags and .mo-libs along to its member objects
333 $(foreach o, $(filter %.mo,$($v)),
334 $(foreach p,$($o-objs),
335 $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
336 $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
337
338 # For all %.mo objects that are directly added into -y, just expand them
339 $(foreach v,$(filter %-y,$2),
340 $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
341
342 $(foreach v,$(filter %-m,$2),
343 # All .o found in *-m variables are single object modules, create .mo
344 # for them
345 $(foreach o,$(filter %.o,$($v)),
346 $(eval $(o:%.o=%.mo)-objs := $o))
347 # Now unify .o in -m variable to .mo
348 $(eval $v := $($v:%.o=%.mo))
349 $(eval modules-m += $($v))
350
351 # For module build, build shared libraries during "make modules"
352 # For non-module build, add -m to -y
353 $(if $(CONFIG_MODULES),
354 $(foreach o,$($v),
355 $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
356 $(eval $o: $($o-objs)))
357 $(eval $(patsubst %-m,%-y,$v) += $($v))
358 $(eval modules: $($v:%.mo=%$(DSOSUF))),
359 $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
360
361 # Post-process all the unnested vars
362 $(foreach v,$2,
363 $(foreach o, $(filter %.mo,$($v)),
364 # Find all the .mo objects in variables and add dependency rules
365 # according to .mo-objs. Report error if not set
366 $(if $($o-objs),
367 $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
368 $(error $o added in $v but $o-objs is not set)))
369 $(shell mkdir -p ./ $(sort $(dir $($v))))
370 # Include all the .d files
371 $(eval -include $(addsuffix *.d, $(sort $(dir $($v)))))
372 $(eval $v := $(filter-out %/,$($v))))
373 endef