s390x/sclpconsole-lm: truncate input if line is too long
[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 %$(DSOSUF): CFLAGS += -fPIC -DBUILD_DSO
106 %$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
107 %$(DSOSUF): %.mo
108 $(call LINK,$^)
109 @# Copy to build root so modules can be loaded when program started without install
110 $(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)"))
111
112
113 LD_REL := $(CC) -nostdlib -Wl,-r
114
115 %.mo:
116 $(call quiet-command,$(LD_REL) -o $@ $^," LD -r $(TARGET_DIR)$@")
117
118 .PHONY: modules
119 modules:
120
121 %$(EXESUF): %.o
122 $(call LINK,$^)
123
124 %.a:
125 $(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@")
126
127 quiet-command = $(if $(V),$1,$(if $(2),@echo $2 && $1, @$1))
128
129 # cc-option
130 # Usage: CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
131
132 cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
133 >/dev/null 2>&1 && echo OK), $2, $3)
134
135 VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
136 set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
137
138 # install-prog list, dir
139 define install-prog
140 $(INSTALL_DIR) "$2"
141 $(INSTALL_PROG) $1 "$2"
142 $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
143 endef
144
145 # find-in-path
146 # Usage: $(call find-in-path, prog)
147 # Looks in the PATH if the argument contains no slash, else only considers one
148 # specific directory. Returns an # empty string if the program doesn't exist
149 # there.
150 find-in-path = $(if $(find-string /, $1), \
151 $(wildcard $1), \
152 $(wildcard $(patsubst %, %/$1, $(subst :, ,$(PATH)))))
153
154 # Logical functions (for operating on y/n values like CONFIG_FOO vars)
155 # Inputs to these must be either "y" (true) or "n" or "" (both false)
156 # Output is always either "y" or "n".
157 # Usage: $(call land,$(CONFIG_FOO),$(CONFIG_BAR))
158 # Logical NOT
159 lnot = $(if $(subst n,,$1),n,y)
160 # Logical AND
161 land = $(if $(findstring yy,$1$2),y,n)
162 # Logical OR
163 lor = $(if $(findstring y,$1$2),y,n)
164 # Logical XOR (note that this is the inverse of leqv)
165 lxor = $(if $(filter $(call lnot,$1),$(call lnot,$2)),n,y)
166 # Logical equivalence (note that leqv "","n" is true)
167 leqv = $(if $(filter $(call lnot,$1),$(call lnot,$2)),y,n)
168 # Logical if: like make's $(if) but with an leqv-like test
169 lif = $(if $(subst n,,$1),$2,$3)
170
171 # String testing functions: inputs to these can be any string;
172 # the output is always either "y" or "n". Leading and trailing whitespace
173 # is ignored when comparing strings.
174 # String equality
175 eq = $(if $(subst $2,,$1)$(subst $1,,$2),n,y)
176 # String inequality
177 ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
178 # Emptiness/non-emptiness tests:
179 isempty = $(if $1,n,y)
180 notempty = $(if $1,y,n)
181
182 # Generate files with tracetool
183 TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py
184
185 # Generate timestamp files for .h include files
186
187 config-%.h: config-%.h-timestamp
188 @cmp $< $@ >/dev/null 2>&1 || cp $< $@
189
190 config-%.h-timestamp: config-%.mak
191 $(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h")
192
193 .PHONY: clean-timestamp
194 clean-timestamp:
195 rm -f *.timestamp
196 clean: clean-timestamp
197
198 # will delete the target of a rule if commands exit with a nonzero exit status
199 .DELETE_ON_ERROR:
200
201 # save-vars
202 # Usage: $(call save-vars, vars)
203 # Save each variable $v in $vars as save-vars-$v, save their object's
204 # variables, then clear $v.
205 define save-vars
206 $(foreach v,$1,
207 $(eval save-vars-$v := $(value $v))
208 $(foreach o,$($v),
209 $(foreach k,cflags libs objs,
210 $(if $($o-$k),
211 $(eval save-vars-$o-$k := $($o-$k))
212 $(eval $o-$k := ))))
213 $(eval $v := ))
214 endef
215
216 # load-vars
217 # Usage: $(call load-vars, vars, add_var)
218 # Load the saved value for each variable in @vars, and the per object
219 # variables.
220 # Append @add_var's current value to the loaded value.
221 define load-vars
222 $(eval $2-new-value := $(value $2))
223 $(foreach v,$1,
224 $(eval $v := $(value save-vars-$v))
225 $(foreach o,$($v),
226 $(foreach k,cflags libs objs,
227 $(if $(save-vars-$o-$k),
228 $(eval $o-$k := $(save-vars-$o-$k))
229 $(eval save-vars-$o-$k := ))))
230 $(eval save-vars-$v := ))
231 $(eval $2 := $(value $2) $($2-new-value))
232 endef
233
234 # fix-paths
235 # Usage: $(call fix-paths, obj_path, src_path, vars)
236 # Add prefix @obj_path to all objects in @vars, and add prefix @src_path to all
237 # directories in @vars.
238 define fix-paths
239 $(foreach v,$3,
240 $(foreach o,$($v),
241 $(if $($o-libs),
242 $(eval $1$o-libs := $($o-libs)))
243 $(if $($o-cflags),
244 $(eval $1$o-cflags := $($o-cflags)))
245 $(if $($o-objs),
246 $(eval $1$o-objs := $(addprefix $1,$($o-objs)))))
247 $(eval $v := $(addprefix $1,$(filter-out %/,$($v))) \
248 $(addprefix $2,$(filter %/,$($v)))))
249 endef
250
251 # unnest-var-recursive
252 # Usage: $(call unnest-var-recursive, obj_prefix, vars, var)
253 #
254 # Unnest @var by including subdir Makefile.objs, while protect others in @vars
255 # unchanged.
256 #
257 # @obj_prefix is the starting point of object path prefix.
258 #
259 define unnest-var-recursive
260 $(eval dirs := $(sort $(filter %/,$($3))))
261 $(eval $3 := $(filter-out %/,$($3)))
262 $(foreach d,$(dirs:%/=%),
263 $(call save-vars,$2)
264 $(eval obj := $(if $1,$1/)$d)
265 $(eval -include $(SRC_PATH)/$d/Makefile.objs)
266 $(call fix-paths,$(if $1,$1/)$d/,$d/,$2)
267 $(call load-vars,$2,$3)
268 $(call unnest-var-recursive,$1,$2,$3))
269 endef
270
271 # unnest-vars
272 # Usage: $(call unnest-vars, obj_prefix, vars)
273 #
274 # @obj_prefix: object path prefix, can be empty, or '..', etc. Don't include
275 # ending '/'.
276 #
277 # @vars: the list of variable names to unnest.
278 #
279 # This macro will scan subdirectories's Makefile.objs, include them, to build
280 # up each variable listed in @vars.
281 #
282 # Per object and per module cflags and libs are saved with relative path fixed
283 # as well, those variables include -libs, -cflags and -objs. Items in -objs are
284 # also fixed to relative path against SRC_PATH plus the prefix @obj_prefix.
285 #
286 # All nested variables postfixed by -m in names are treated as DSO variables,
287 # and will be built as modules, if enabled.
288 #
289 # A simple example of the unnest:
290 #
291 # obj_prefix = ..
292 # vars = hot cold
293 # hot = fire.o sun.o season/
294 # cold = snow.o water/ season/
295 #
296 # Unnest through a faked source directory structure:
297 #
298 # SRC_PATH
299 # ├── water
300 # │ └── Makefile.objs──────────────────┐
301 # │ │ hot += steam.o │
302 # │ │ cold += ice.mo │
303 # │ │ ice.mo-libs := -licemaker │
304 # │ │ ice.mo-objs := ice1.o ice2.o │
305 # │ └──────────────────────────────┘
306 # │
307 # └── season
308 # └── Makefile.objs──────┐
309 # │ hot += summer.o │
310 # │ cold += winter.o │
311 # └──────────────────┘
312 #
313 # In the end, the result will be:
314 #
315 # hot = ../fire.o ../sun.o ../season/summer.o
316 # cold = ../snow.o ../water/ice.mo ../season/winter.o
317 # ../water/ice.mo-libs = -licemaker
318 # ../water/ice.mo-objs = ../water/ice1.o ../water/ice2.o
319 #
320 # Note that 'hot' didn't include 'season/' in the input, so 'summer.o' is not
321 # included.
322 #
323 define unnest-vars
324 # In the case of target build (i.e. $1 == ..), fix path for top level
325 # Makefile.objs objects
326 $(if $1,$(call fix-paths,$1/,,$2))
327
328 # Descend and include every subdir Makefile.objs
329 $(foreach v, $2, $(call unnest-var-recursive,$1,$2,$v))
330
331 $(foreach v,$(filter %-m,$2),
332 # All .o found in *-m variables are single object modules, create .mo
333 # for them
334 $(foreach o,$(filter %.o,$($v)),
335 $(eval $(o:%.o=%.mo)-objs := $o))
336 # Now unify .o in -m variable to .mo
337 $(eval $v := $($v:%.o=%.mo))
338 $(eval modules-m += $($v))
339
340 # For module build, build shared libraries during "make modules"
341 # For non-module build, add -m to -y
342 $(if $(CONFIG_MODULES),
343 $(foreach o,$($v),
344 $(eval $o: $($o-objs)))
345 $(eval $(patsubst %-m,%-y,$v) += $($v))
346 $(eval modules: $($v:%.mo=%$(DSOSUF))),
347 $(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
348
349 # Post-process all the unnested vars
350 $(foreach v,$2,
351 $(foreach o, $(filter %.mo,$($v)),
352 # Find all the .mo objects in variables and add dependency rules
353 # according to .mo-objs. Report error if not set
354 $(if $($o-objs),
355 $(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
356 $(error $o added in $v but $o-objs is not set))
357 # Pass the .mo-cflags and .mo-libs along to member objects
358 $(foreach p,$($o-objs),
359 $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
360 $(if $($o-libs), $(eval $p-libs += $($o-libs)))))
361 $(shell mkdir -p ./ $(sort $(dir $($v))))
362 # Include all the .d files
363 $(eval -include $(addsuffix *.d, $(sort $(dir $($v)))))
364 $(eval $v := $(filter-out %/,$($v))))
365
366 # For all %.mo objects that are directly added into -y, expand them to %.mo-objs
367 $(foreach v,$2,
368 $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
369
370 endef