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Source at commit fbf123cd4cc0c097fe9a99c90109ebb2a5e94a50 created 10 years 3 months ago. By Lars-Peter Clausen, dma: jz4740: Dequeue descriptor from active list before completing it | |
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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 ccflags-y) |
50 | endif |
51 | endif |
52 | |
53 | include scripts/Makefile.lib |
54 | |
55 | ifdef host-progs |
56 | ifneq ($(hostprogs-y),$(host-progs)) |
57 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
58 | hostprogs-y += $(host-progs) |
59 | endif |
60 | endif |
61 | |
62 | # Do not include host rules unless needed |
63 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
64 | include scripts/Makefile.host |
65 | endif |
66 | |
67 | ifneq ($(KBUILD_SRC),) |
68 | # Create output directory if not already present |
69 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
70 | |
71 | # Create directories for object files if directory does not exist |
72 | # Needed when obj-y := dir/file.o syntax is used |
73 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
74 | endif |
75 | |
76 | ifndef obj |
77 | $(warning kbuild: Makefile.build is included improperly) |
78 | endif |
79 | |
80 | # =========================================================================== |
81 | |
82 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) |
83 | lib-target := $(obj)/lib.a |
84 | endif |
85 | |
86 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) |
87 | builtin-target := $(obj)/built-in.o |
88 | endif |
89 | |
90 | modorder-target := $(obj)/modules.order |
91 | |
92 | # We keep a list of all modules in $(MODVERDIR) |
93 | |
94 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
95 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
96 | $(subdir-ym) $(always) |
97 | @: |
98 | |
99 | # Linus' kernel sanity checking tool |
100 | ifneq ($(KBUILD_CHECKSRC),0) |
101 | ifeq ($(KBUILD_CHECKSRC),2) |
102 | quiet_cmd_force_checksrc = CHECK $< |
103 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
104 | else |
105 | quiet_cmd_checksrc = CHECK $< |
106 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
107 | endif |
108 | endif |
109 | |
110 | # Do section mismatch analysis for each module/built-in.o |
111 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
112 | cmd_secanalysis = ; scripts/mod/modpost $@ |
113 | endif |
114 | |
115 | # Compile C sources (.c) |
116 | # --------------------------------------------------------------------------- |
117 | |
118 | # Default is built-in, unless we know otherwise |
119 | modkern_cflags = \ |
120 | $(if $(part-of-module), \ |
121 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
122 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
123 | quiet_modtag := $(empty) $(empty) |
124 | |
125 | $(real-objs-m) : part-of-module := y |
126 | $(real-objs-m:.o=.i) : part-of-module := y |
127 | $(real-objs-m:.o=.s) : part-of-module := y |
128 | $(real-objs-m:.o=.lst): part-of-module := y |
129 | |
130 | $(real-objs-m) : quiet_modtag := [M] |
131 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
132 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
133 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
134 | |
135 | $(obj-m) : quiet_modtag := [M] |
136 | |
137 | # Default for not multi-part modules |
138 | modname = $(basetarget) |
139 | |
140 | $(multi-objs-m) : modname = $(modname-multi) |
141 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
142 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
143 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
144 | $(multi-objs-y) : modname = $(modname-multi) |
145 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
146 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
147 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
148 | |
149 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
150 | cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
151 | |
152 | $(obj)/%.s: $(src)/%.c FORCE |
153 | $(call if_changed_dep,cc_s_c) |
154 | |
155 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
156 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
157 | |
158 | $(obj)/%.i: $(src)/%.c FORCE |
159 | $(call if_changed_dep,cc_i_c) |
160 | |
161 | cmd_gensymtypes = \ |
162 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
163 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
164 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ |
165 | $(if $(KBUILD_PRESERVE),-p) \ |
166 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
167 | |
168 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
169 | cmd_cc_symtypes_c = \ |
170 | set -e; \ |
171 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
172 | test -s $@ || rm -f $@ |
173 | |
174 | $(obj)/%.symtypes : $(src)/%.c FORCE |
175 | $(call cmd,cc_symtypes_c) |
176 | |
177 | # C (.c) files |
178 | # The C file is compiled and updated dependency information is generated. |
179 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
180 | |
181 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
182 | |
183 | ifndef CONFIG_MODVERSIONS |
184 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
185 | |
186 | else |
187 | # When module versioning is enabled the following steps are executed: |
188 | # o compile a .tmp_<file>.o from <file>.c |
189 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
190 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
191 | # are done. |
192 | # o otherwise, we calculate symbol versions using the good old |
193 | # genksyms on the preprocessed source and postprocess them in a way |
194 | # that they are usable as a linker script |
195 | # o generate <file>.o from .tmp_<file>.o using the linker to |
196 | # replace the unresolved symbols __crc_exported_symbol with |
197 | # the actual value of the checksum generated by genksyms |
198 | |
199 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
200 | cmd_modversions = \ |
201 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
202 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
203 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
204 | \ |
205 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
206 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
207 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
208 | else \ |
209 | mv -f $(@D)/.tmp_$(@F) $@; \ |
210 | fi; |
211 | endif |
212 | |
213 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
214 | ifdef BUILD_C_RECORDMCOUNT |
215 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
216 | RECORDMCOUNT_FLAGS = -w |
217 | endif |
218 | # Due to recursion, we must skip empty.o. |
219 | # The empty.o file is created in the make process in order to determine |
220 | # the target endianness and word size. It is made before all other C |
221 | # files, including recordmcount. |
222 | sub_cmd_record_mcount = \ |
223 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
224 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
225 | fi; |
226 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
227 | $(srctree)/scripts/recordmcount.h |
228 | else |
229 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
230 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
231 | "$(if $(CONFIG_64BIT),64,32)" \ |
232 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
233 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
234 | "$(if $(part-of-module),1,0)" "$(@)"; |
235 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
236 | endif |
237 | cmd_record_mcount = \ |
238 | if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ |
239 | $(sub_cmd_record_mcount) \ |
240 | fi; |
241 | endif |
242 | |
243 | define rule_cc_o_c |
244 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
245 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ |
246 | $(cmd_modversions) \ |
247 | $(call echo-cmd,record_mcount) \ |
248 | $(cmd_record_mcount) \ |
249 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
250 | $(dot-target).tmp; \ |
251 | rm -f $(depfile); \ |
252 | mv -f $(dot-target).tmp $(dot-target).cmd |
253 | endef |
254 | |
255 | # Built-in and composite module parts |
256 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE |
257 | $(call cmd,force_checksrc) |
258 | $(call if_changed_rule,cc_o_c) |
259 | |
260 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
261 | |
262 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE |
263 | $(call cmd,force_checksrc) |
264 | $(call if_changed_rule,cc_o_c) |
265 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
266 | |
267 | quiet_cmd_cc_lst_c = MKLST $@ |
268 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
269 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
270 | System.map $(OBJDUMP) > $@ |
271 | |
272 | $(obj)/%.lst: $(src)/%.c FORCE |
273 | $(call if_changed_dep,cc_lst_c) |
274 | |
275 | # Compile assembler sources (.S) |
276 | # --------------------------------------------------------------------------- |
277 | |
278 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
279 | |
280 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
281 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
282 | |
283 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
284 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
285 | |
286 | $(obj)/%.s: $(src)/%.S FORCE |
287 | $(call if_changed_dep,as_s_S) |
288 | |
289 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
290 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
291 | |
292 | $(obj)/%.o: $(src)/%.S FORCE |
293 | $(call if_changed_dep,as_o_S) |
294 | |
295 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
296 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
297 | |
298 | # Linker scripts preprocessor (.lds.S -> .lds) |
299 | # --------------------------------------------------------------------------- |
300 | quiet_cmd_cpp_lds_S = LDS $@ |
301 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
302 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
303 | |
304 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
305 | $(call if_changed_dep,cpp_lds_S) |
306 | |
307 | # ASN.1 grammar |
308 | # --------------------------------------------------------------------------- |
309 | quiet_cmd_asn1_compiler = ASN.1 $@ |
310 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
311 | $(subst .h,.c,$@) $(subst .c,.h,$@) |
312 | |
313 | .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h |
314 | |
315 | $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
316 | $(call cmd,asn1_compiler) |
317 | |
318 | # Build the compiled-in targets |
319 | # --------------------------------------------------------------------------- |
320 | |
321 | # To build objects in subdirs, we need to descend into the directories |
322 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
323 | |
324 | # |
325 | # Rule to compile a set of .o files into one .o file |
326 | # |
327 | ifdef builtin-target |
328 | quiet_cmd_link_o_target = LD $@ |
329 | # If the list of objects to link is empty, just create an empty built-in.o |
330 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
331 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
332 | $(cmd_secanalysis),\ |
333 | rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) |
334 | |
335 | $(builtin-target): $(obj-y) FORCE |
336 | $(call if_changed,link_o_target) |
337 | |
338 | targets += $(builtin-target) |
339 | endif # builtin-target |
340 | |
341 | # |
342 | # Rule to create modules.order file |
343 | # |
344 | # Create commands to either record .ko file or cat modules.order from |
345 | # a subdirectory |
346 | modorder-cmds = \ |
347 | $(foreach m, $(modorder), \ |
348 | $(if $(filter %/modules.order, $m), \ |
349 | cat $m;, echo kernel/$m;)) |
350 | |
351 | $(modorder-target): $(subdir-ym) FORCE |
352 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
353 | |
354 | # |
355 | # Rule to compile a set of .o files into one .a file |
356 | # |
357 | ifdef lib-target |
358 | quiet_cmd_link_l_target = AR $@ |
359 | cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) |
360 | |
361 | $(lib-target): $(lib-y) FORCE |
362 | $(call if_changed,link_l_target) |
363 | |
364 | targets += $(lib-target) |
365 | endif |
366 | |
367 | # |
368 | # Rule to link composite objects |
369 | # |
370 | # Composite objects are specified in kbuild makefile as follows: |
371 | # <composite-object>-objs := <list of .o files> |
372 | # or |
373 | # <composite-object>-y := <list of .o files> |
374 | link_multi_deps = \ |
375 | $(filter $(addprefix $(obj)/, \ |
376 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
377 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) |
378 | |
379 | quiet_cmd_link_multi-y = LD $@ |
380 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
381 | |
382 | quiet_cmd_link_multi-m = LD [M] $@ |
383 | cmd_link_multi-m = $(cmd_link_multi-y) |
384 | |
385 | # We would rather have a list of rules like |
386 | # foo.o: $(foo-objs) |
387 | # but that's not so easy, so we rather make all composite objects depend |
388 | # on the set of all their parts |
389 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE |
390 | $(call if_changed,link_multi-y) |
391 | |
392 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE |
393 | $(call if_changed,link_multi-m) |
394 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
395 | |
396 | targets += $(multi-used-y) $(multi-used-m) |
397 | |
398 | |
399 | # Descending |
400 | # --------------------------------------------------------------------------- |
401 | |
402 | PHONY += $(subdir-ym) |
403 | $(subdir-ym): |
404 | $(Q)$(MAKE) $(build)=$@ |
405 | |
406 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
407 | # --------------------------------------------------------------------------- |
408 | |
409 | PHONY += FORCE |
410 | |
411 | FORCE: |
412 | |
413 | # Read all saved command lines and dependencies for the $(targets) we |
414 | # may be building above, using $(if_changed{,_dep}). As an |
415 | # optimization, we don't need to read them if the target does not |
416 | # exist, we will rebuild anyway in that case. |
417 | |
418 | targets := $(wildcard $(sort $(targets))) |
419 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
420 | |
421 | ifneq ($(cmd_files),) |
422 | include $(cmd_files) |
423 | endif |
424 | |
425 | # Declare the contents of the .PHONY variable as phony. We keep that |
426 | # information in a variable se we can use it in if_changed and friends. |
427 | |
428 | .PHONY: $(PHONY) |
429 |
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Tags:
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