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