Root/
1 | # ========================================================================== |
2 | # Building |
3 | # ========================================================================== |
4 | |
5 | src := $(obj) |
6 | |
7 | PHONY := __build |
8 | __build: |
9 | |
10 | # Init all relevant variables used in kbuild files so |
11 | # 1) they have correct type |
12 | # 2) they do not inherit any value from the environment |
13 | obj-y := |
14 | obj-m := |
15 | lib-y := |
16 | lib-m := |
17 | always := |
18 | targets := |
19 | subdir-y := |
20 | subdir-m := |
21 | EXTRA_AFLAGS := |
22 | EXTRA_CFLAGS := |
23 | EXTRA_CPPFLAGS := |
24 | EXTRA_LDFLAGS := |
25 | asflags-y := |
26 | ccflags-y := |
27 | cppflags-y := |
28 | ldflags-y := |
29 | |
30 | subdir-asflags-y := |
31 | subdir-ccflags-y := |
32 | |
33 | # Read auto.conf if it exists, otherwise ignore |
34 | -include include/config/auto.conf |
35 | |
36 | include scripts/Kbuild.include |
37 | |
38 | # For backward compatibility check that these variables do not change |
39 | save-cflags := $(CFLAGS) |
40 | |
41 | # The filename Kbuild has precedence over Makefile |
42 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
43 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
44 | include $(kbuild-file) |
45 | |
46 | # If the save-* variables changed error out |
47 | ifeq ($(KBUILD_NOPEDANTIC),) |
48 | ifneq ("$(save-cflags)","$(CFLAGS)") |
49 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS) |
50 | endif |
51 | endif |
52 | include scripts/Makefile.lib |
53 | |
54 | ifdef host-progs |
55 | ifneq ($(hostprogs-y),$(host-progs)) |
56 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
57 | hostprogs-y += $(host-progs) |
58 | endif |
59 | endif |
60 | |
61 | # Do not include host rules unless needed |
62 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
63 | include scripts/Makefile.host |
64 | endif |
65 | |
66 | ifneq ($(KBUILD_SRC),) |
67 | # Create output directory if not already present |
68 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
69 | |
70 | # Create directories for object files if directory does not exist |
71 | # Needed when obj-y := dir/file.o syntax is used |
72 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
73 | endif |
74 | |
75 | ifndef obj |
76 | $(warning kbuild: Makefile.build is included improperly) |
77 | endif |
78 | |
79 | # =========================================================================== |
80 | |
81 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) |
82 | lib-target := $(obj)/lib.a |
83 | endif |
84 | |
85 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) |
86 | builtin-target := $(obj)/built-in.o |
87 | endif |
88 | |
89 | modorder-target := $(obj)/modules.order |
90 | |
91 | # We keep a list of all modules in $(MODVERDIR) |
92 | |
93 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
94 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
95 | $(subdir-ym) $(always) |
96 | @: |
97 | |
98 | # Linus' kernel sanity checking tool |
99 | ifneq ($(KBUILD_CHECKSRC),0) |
100 | ifeq ($(KBUILD_CHECKSRC),2) |
101 | quiet_cmd_force_checksrc = CHECK $< |
102 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
103 | else |
104 | quiet_cmd_checksrc = CHECK $< |
105 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
106 | endif |
107 | endif |
108 | |
109 | # Do section mismatch analysis for each module/built-in.o |
110 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
111 | cmd_secanalysis = ; scripts/mod/modpost $@ |
112 | endif |
113 | |
114 | # Compile C sources (.c) |
115 | # --------------------------------------------------------------------------- |
116 | |
117 | # Default is built-in, unless we know otherwise |
118 | modkern_cflags = \ |
119 | $(if $(part-of-module), \ |
120 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
121 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
122 | quiet_modtag := $(empty) $(empty) |
123 | |
124 | $(real-objs-m) : part-of-module := y |
125 | $(real-objs-m:.o=.i) : part-of-module := y |
126 | $(real-objs-m:.o=.s) : part-of-module := y |
127 | $(real-objs-m:.o=.lst): part-of-module := y |
128 | |
129 | $(real-objs-m) : quiet_modtag := [M] |
130 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
131 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
132 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
133 | |
134 | $(obj-m) : quiet_modtag := [M] |
135 | |
136 | # Default for not multi-part modules |
137 | modname = $(basetarget) |
138 | |
139 | $(multi-objs-m) : modname = $(modname-multi) |
140 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
141 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
142 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
143 | $(multi-objs-y) : modname = $(modname-multi) |
144 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
145 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
146 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
147 | |
148 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
149 | cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $< |
150 | |
151 | $(obj)/%.s: $(src)/%.c FORCE |
152 | $(call if_changed_dep,cc_s_c) |
153 | |
154 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
155 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
156 | |
157 | $(obj)/%.i: $(src)/%.c FORCE |
158 | $(call if_changed_dep,cc_i_c) |
159 | |
160 | cmd_gensymtypes = \ |
161 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
162 | $(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \ |
163 | $(if $(KBUILD_PRESERVE),-p) \ |
164 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
165 | |
166 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
167 | cmd_cc_symtypes_c = \ |
168 | set -e; \ |
169 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
170 | test -s $@ || rm -f $@ |
171 | |
172 | $(obj)/%.symtypes : $(src)/%.c FORCE |
173 | $(call cmd,cc_symtypes_c) |
174 | |
175 | # C (.c) files |
176 | # The C file is compiled and updated dependency information is generated. |
177 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
178 | |
179 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
180 | |
181 | ifndef CONFIG_MODVERSIONS |
182 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
183 | |
184 | else |
185 | # When module versioning is enabled the following steps are executed: |
186 | # o compile a .tmp_<file>.o from <file>.c |
187 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
188 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
189 | # are done. |
190 | # o otherwise, we calculate symbol versions using the good old |
191 | # genksyms on the preprocessed source and postprocess them in a way |
192 | # that they are usable as a linker script |
193 | # o generate <file>.o from .tmp_<file>.o using the linker to |
194 | # replace the unresolved symbols __crc_exported_symbol with |
195 | # the actual value of the checksum generated by genksyms |
196 | |
197 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
198 | cmd_modversions = \ |
199 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
200 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
201 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
202 | \ |
203 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
204 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
205 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
206 | else \ |
207 | mv -f $(@D)/.tmp_$(@F) $@; \ |
208 | fi; |
209 | endif |
210 | |
211 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
212 | ifdef BUILD_C_RECORDMCOUNT |
213 | # Due to recursion, we must skip empty.o. |
214 | # The empty.o file is created in the make process in order to determine |
215 | # the target endianness and word size. It is made before all other C |
216 | # files, including recordmcount. |
217 | sub_cmd_record_mcount = \ |
218 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
219 | $(objtree)/scripts/recordmcount "$(@)"; \ |
220 | fi; |
221 | else |
222 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
223 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
224 | "$(if $(CONFIG_64BIT),64,32)" \ |
225 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
226 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
227 | "$(if $(part-of-module),1,0)" "$(@)"; |
228 | endif |
229 | cmd_record_mcount = \ |
230 | if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ |
231 | $(sub_cmd_record_mcount) \ |
232 | fi; |
233 | endif |
234 | |
235 | define rule_cc_o_c |
236 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
237 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ |
238 | $(cmd_modversions) \ |
239 | $(call echo-cmd,record_mcount) \ |
240 | $(cmd_record_mcount) \ |
241 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
242 | $(dot-target).tmp; \ |
243 | rm -f $(depfile); \ |
244 | mv -f $(dot-target).tmp $(dot-target).cmd |
245 | endef |
246 | |
247 | # Built-in and composite module parts |
248 | $(obj)/%.o: $(src)/%.c FORCE |
249 | $(call cmd,force_checksrc) |
250 | $(call if_changed_rule,cc_o_c) |
251 | |
252 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
253 | |
254 | $(single-used-m): $(obj)/%.o: $(src)/%.c FORCE |
255 | $(call cmd,force_checksrc) |
256 | $(call if_changed_rule,cc_o_c) |
257 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
258 | |
259 | quiet_cmd_cc_lst_c = MKLST $@ |
260 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
261 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
262 | System.map $(OBJDUMP) > $@ |
263 | |
264 | $(obj)/%.lst: $(src)/%.c FORCE |
265 | $(call if_changed_dep,cc_lst_c) |
266 | |
267 | # Compile assembler sources (.S) |
268 | # --------------------------------------------------------------------------- |
269 | |
270 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
271 | |
272 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
273 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
274 | |
275 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
276 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
277 | |
278 | $(obj)/%.s: $(src)/%.S FORCE |
279 | $(call if_changed_dep,as_s_S) |
280 | |
281 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
282 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
283 | |
284 | $(obj)/%.o: $(src)/%.S FORCE |
285 | $(call if_changed_dep,as_o_S) |
286 | |
287 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
288 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
289 | |
290 | # Linker scripts preprocessor (.lds.S -> .lds) |
291 | # --------------------------------------------------------------------------- |
292 | quiet_cmd_cpp_lds_S = LDS $@ |
293 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
294 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
295 | |
296 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
297 | $(call if_changed_dep,cpp_lds_S) |
298 | |
299 | # Build the compiled-in targets |
300 | # --------------------------------------------------------------------------- |
301 | |
302 | # To build objects in subdirs, we need to descend into the directories |
303 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
304 | |
305 | # |
306 | # Rule to compile a set of .o files into one .o file |
307 | # |
308 | ifdef builtin-target |
309 | quiet_cmd_link_o_target = LD $@ |
310 | # If the list of objects to link is empty, just create an empty built-in.o |
311 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
312 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
313 | $(cmd_secanalysis),\ |
314 | rm -f $@; $(AR) rcs $@) |
315 | |
316 | $(builtin-target): $(obj-y) FORCE |
317 | $(call if_changed,link_o_target) |
318 | |
319 | targets += $(builtin-target) |
320 | endif # builtin-target |
321 | |
322 | # |
323 | # Rule to create modules.order file |
324 | # |
325 | # Create commands to either record .ko file or cat modules.order from |
326 | # a subdirectory |
327 | modorder-cmds = \ |
328 | $(foreach m, $(modorder), \ |
329 | $(if $(filter %/modules.order, $m), \ |
330 | cat $m;, echo kernel/$m;)) |
331 | |
332 | $(modorder-target): $(subdir-ym) FORCE |
333 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
334 | |
335 | # |
336 | # Rule to compile a set of .o files into one .a file |
337 | # |
338 | ifdef lib-target |
339 | quiet_cmd_link_l_target = AR $@ |
340 | cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y) |
341 | |
342 | $(lib-target): $(lib-y) FORCE |
343 | $(call if_changed,link_l_target) |
344 | |
345 | targets += $(lib-target) |
346 | endif |
347 | |
348 | # |
349 | # Rule to link composite objects |
350 | # |
351 | # Composite objects are specified in kbuild makefile as follows: |
352 | # <composite-object>-objs := <list of .o files> |
353 | # or |
354 | # <composite-object>-y := <list of .o files> |
355 | link_multi_deps = \ |
356 | $(filter $(addprefix $(obj)/, \ |
357 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
358 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) |
359 | |
360 | quiet_cmd_link_multi-y = LD $@ |
361 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
362 | |
363 | quiet_cmd_link_multi-m = LD [M] $@ |
364 | cmd_link_multi-m = $(cmd_link_multi-y) |
365 | |
366 | # We would rather have a list of rules like |
367 | # foo.o: $(foo-objs) |
368 | # but that's not so easy, so we rather make all composite objects depend |
369 | # on the set of all their parts |
370 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE |
371 | $(call if_changed,link_multi-y) |
372 | |
373 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE |
374 | $(call if_changed,link_multi-m) |
375 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
376 | |
377 | targets += $(multi-used-y) $(multi-used-m) |
378 | |
379 | |
380 | # Descending |
381 | # --------------------------------------------------------------------------- |
382 | |
383 | PHONY += $(subdir-ym) |
384 | $(subdir-ym): |
385 | $(Q)$(MAKE) $(build)=$@ |
386 | |
387 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
388 | # --------------------------------------------------------------------------- |
389 | |
390 | PHONY += FORCE |
391 | |
392 | FORCE: |
393 | |
394 | # Read all saved command lines and dependencies for the $(targets) we |
395 | # may be building above, using $(if_changed{,_dep}). As an |
396 | # optimization, we don't need to read them if the target does not |
397 | # exist, we will rebuild anyway in that case. |
398 | |
399 | targets := $(wildcard $(sort $(targets))) |
400 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
401 | |
402 | ifneq ($(cmd_files),) |
403 | include $(cmd_files) |
404 | endif |
405 | |
406 | |
407 | # Declare the contents of the .PHONY variable as phony. We keep that |
408 | # information in a variable se we can use it in if_changed and friends. |
409 | |
410 | .PHONY: $(PHONY) |
411 |
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ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9