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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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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 EXTRA_CFLAGS) |
50 | endif |
51 | endif |
52 | |
53 | # |
54 | # make W=1 settings |
55 | # |
56 | # $(call cc-option... ) handles gcc -W.. options which |
57 | # are not supported by all versions of the compiler |
58 | ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS |
59 | KBUILD_EXTRA_WARNINGS := -Wextra |
60 | KBUILD_EXTRA_WARNINGS += -Wunused -Wno-unused-parameter |
61 | KBUILD_EXTRA_WARNINGS += -Waggregate-return |
62 | KBUILD_EXTRA_WARNINGS += -Wbad-function-cast |
63 | KBUILD_EXTRA_WARNINGS += -Wcast-qual |
64 | KBUILD_EXTRA_WARNINGS += -Wcast-align |
65 | KBUILD_EXTRA_WARNINGS += -Wconversion |
66 | KBUILD_EXTRA_WARNINGS += -Wdisabled-optimization |
67 | KBUILD_EXTRA_WARNINGS += -Wlogical-op |
68 | KBUILD_EXTRA_WARNINGS += -Wmissing-declarations |
69 | KBUILD_EXTRA_WARNINGS += -Wmissing-format-attribute |
70 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Wmissing-include-dirs,) |
71 | KBUILD_EXTRA_WARNINGS += -Wmissing-prototypes |
72 | KBUILD_EXTRA_WARNINGS += -Wnested-externs |
73 | KBUILD_EXTRA_WARNINGS += -Wold-style-definition |
74 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Woverlength-strings,) |
75 | KBUILD_EXTRA_WARNINGS += -Wpacked |
76 | KBUILD_EXTRA_WARNINGS += -Wpacked-bitfield-compat |
77 | KBUILD_EXTRA_WARNINGS += -Wpadded |
78 | KBUILD_EXTRA_WARNINGS += -Wpointer-arith |
79 | KBUILD_EXTRA_WARNINGS += -Wredundant-decls |
80 | KBUILD_EXTRA_WARNINGS += -Wshadow |
81 | KBUILD_EXTRA_WARNINGS += -Wswitch-default |
82 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Wvla,) |
83 | KBUILD_CFLAGS += $(KBUILD_EXTRA_WARNINGS) |
84 | endif |
85 | |
86 | include scripts/Makefile.lib |
87 | |
88 | ifdef host-progs |
89 | ifneq ($(hostprogs-y),$(host-progs)) |
90 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
91 | hostprogs-y += $(host-progs) |
92 | endif |
93 | endif |
94 | |
95 | # Do not include host rules unless needed |
96 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
97 | include scripts/Makefile.host |
98 | endif |
99 | |
100 | ifneq ($(KBUILD_SRC),) |
101 | # Create output directory if not already present |
102 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
103 | |
104 | # Create directories for object files if directory does not exist |
105 | # Needed when obj-y := dir/file.o syntax is used |
106 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
107 | endif |
108 | |
109 | ifndef obj |
110 | $(warning kbuild: Makefile.build is included improperly) |
111 | endif |
112 | |
113 | # =========================================================================== |
114 | |
115 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) |
116 | lib-target := $(obj)/lib.a |
117 | endif |
118 | |
119 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) |
120 | builtin-target := $(obj)/built-in.o |
121 | endif |
122 | |
123 | modorder-target := $(obj)/modules.order |
124 | |
125 | # We keep a list of all modules in $(MODVERDIR) |
126 | |
127 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
128 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
129 | $(subdir-ym) $(always) |
130 | @: |
131 | |
132 | # Linus' kernel sanity checking tool |
133 | ifneq ($(KBUILD_CHECKSRC),0) |
134 | ifeq ($(KBUILD_CHECKSRC),2) |
135 | quiet_cmd_force_checksrc = CHECK $< |
136 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
137 | else |
138 | quiet_cmd_checksrc = CHECK $< |
139 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
140 | endif |
141 | endif |
142 | |
143 | # Do section mismatch analysis for each module/built-in.o |
144 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
145 | cmd_secanalysis = ; scripts/mod/modpost $@ |
146 | endif |
147 | |
148 | # Compile C sources (.c) |
149 | # --------------------------------------------------------------------------- |
150 | |
151 | # Default is built-in, unless we know otherwise |
152 | modkern_cflags = \ |
153 | $(if $(part-of-module), \ |
154 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
155 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
156 | quiet_modtag := $(empty) $(empty) |
157 | |
158 | $(real-objs-m) : part-of-module := y |
159 | $(real-objs-m:.o=.i) : part-of-module := y |
160 | $(real-objs-m:.o=.s) : part-of-module := y |
161 | $(real-objs-m:.o=.lst): part-of-module := y |
162 | |
163 | $(real-objs-m) : quiet_modtag := [M] |
164 | $(real-objs-m:.o=.i) : quiet_modtag := [M] |
165 | $(real-objs-m:.o=.s) : quiet_modtag := [M] |
166 | $(real-objs-m:.o=.lst): quiet_modtag := [M] |
167 | |
168 | $(obj-m) : quiet_modtag := [M] |
169 | |
170 | # Default for not multi-part modules |
171 | modname = $(basetarget) |
172 | |
173 | $(multi-objs-m) : modname = $(modname-multi) |
174 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) |
175 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) |
176 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
177 | $(multi-objs-y) : modname = $(modname-multi) |
178 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) |
179 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) |
180 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
181 | |
182 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
183 | cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $< |
184 | |
185 | $(obj)/%.s: $(src)/%.c FORCE |
186 | $(call if_changed_dep,cc_s_c) |
187 | |
188 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
189 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
190 | |
191 | $(obj)/%.i: $(src)/%.c FORCE |
192 | $(call if_changed_dep,cc_i_c) |
193 | |
194 | cmd_gensymtypes = \ |
195 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
196 | $(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \ |
197 | $(if $(KBUILD_PRESERVE),-p) \ |
198 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
199 | |
200 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
201 | cmd_cc_symtypes_c = \ |
202 | set -e; \ |
203 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
204 | test -s $@ || rm -f $@ |
205 | |
206 | $(obj)/%.symtypes : $(src)/%.c FORCE |
207 | $(call cmd,cc_symtypes_c) |
208 | |
209 | # C (.c) files |
210 | # The C file is compiled and updated dependency information is generated. |
211 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
212 | |
213 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
214 | |
215 | ifndef CONFIG_MODVERSIONS |
216 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
217 | |
218 | else |
219 | # When module versioning is enabled the following steps are executed: |
220 | # o compile a .tmp_<file>.o from <file>.c |
221 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
222 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and |
223 | # are done. |
224 | # o otherwise, we calculate symbol versions using the good old |
225 | # genksyms on the preprocessed source and postprocess them in a way |
226 | # that they are usable as a linker script |
227 | # o generate <file>.o from .tmp_<file>.o using the linker to |
228 | # replace the unresolved symbols __crc_exported_symbol with |
229 | # the actual value of the checksum generated by genksyms |
230 | |
231 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
232 | cmd_modversions = \ |
233 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
234 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
235 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
236 | \ |
237 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
238 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
239 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
240 | else \ |
241 | mv -f $(@D)/.tmp_$(@F) $@; \ |
242 | fi; |
243 | endif |
244 | |
245 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
246 | ifdef BUILD_C_RECORDMCOUNT |
247 | # Due to recursion, we must skip empty.o. |
248 | # The empty.o file is created in the make process in order to determine |
249 | # the target endianness and word size. It is made before all other C |
250 | # files, including recordmcount. |
251 | sub_cmd_record_mcount = \ |
252 | if [ $(@) != "scripts/mod/empty.o" ]; then \ |
253 | $(objtree)/scripts/recordmcount "$(@)"; \ |
254 | fi; |
255 | else |
256 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
257 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
258 | "$(if $(CONFIG_64BIT),64,32)" \ |
259 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
260 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
261 | "$(if $(part-of-module),1,0)" "$(@)"; |
262 | endif |
263 | cmd_record_mcount = \ |
264 | if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ |
265 | $(sub_cmd_record_mcount) \ |
266 | fi; |
267 | endif |
268 | |
269 | define rule_cc_o_c |
270 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
271 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ |
272 | $(cmd_modversions) \ |
273 | $(call echo-cmd,record_mcount) \ |
274 | $(cmd_record_mcount) \ |
275 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
276 | $(dot-target).tmp; \ |
277 | rm -f $(depfile); \ |
278 | mv -f $(dot-target).tmp $(dot-target).cmd |
279 | endef |
280 | |
281 | # Built-in and composite module parts |
282 | $(obj)/%.o: $(src)/%.c FORCE |
283 | $(call cmd,force_checksrc) |
284 | $(call if_changed_rule,cc_o_c) |
285 | |
286 | # Single-part modules are special since we need to mark them in $(MODVERDIR) |
287 | |
288 | $(single-used-m): $(obj)/%.o: $(src)/%.c FORCE |
289 | $(call cmd,force_checksrc) |
290 | $(call if_changed_rule,cc_o_c) |
291 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
292 | |
293 | quiet_cmd_cc_lst_c = MKLST $@ |
294 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
295 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
296 | System.map $(OBJDUMP) > $@ |
297 | |
298 | $(obj)/%.lst: $(src)/%.c FORCE |
299 | $(call if_changed_dep,cc_lst_c) |
300 | |
301 | # Compile assembler sources (.S) |
302 | # --------------------------------------------------------------------------- |
303 | |
304 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
305 | |
306 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
307 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
308 | |
309 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
310 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
311 | |
312 | $(obj)/%.s: $(src)/%.S FORCE |
313 | $(call if_changed_dep,as_s_S) |
314 | |
315 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
316 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
317 | |
318 | $(obj)/%.o: $(src)/%.S FORCE |
319 | $(call if_changed_dep,as_o_S) |
320 | |
321 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
322 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
323 | |
324 | # Linker scripts preprocessor (.lds.S -> .lds) |
325 | # --------------------------------------------------------------------------- |
326 | quiet_cmd_cpp_lds_S = LDS $@ |
327 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
328 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
329 | |
330 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
331 | $(call if_changed_dep,cpp_lds_S) |
332 | |
333 | # Build the compiled-in targets |
334 | # --------------------------------------------------------------------------- |
335 | |
336 | # To build objects in subdirs, we need to descend into the directories |
337 | $(sort $(subdir-obj-y)): $(subdir-ym) ; |
338 | |
339 | # |
340 | # Rule to compile a set of .o files into one .o file |
341 | # |
342 | ifdef builtin-target |
343 | quiet_cmd_link_o_target = LD $@ |
344 | # If the list of objects to link is empty, just create an empty built-in.o |
345 | cmd_link_o_target = $(if $(strip $(obj-y)),\ |
346 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
347 | $(cmd_secanalysis),\ |
348 | rm -f $@; $(AR) rcs $@) |
349 | |
350 | $(builtin-target): $(obj-y) FORCE |
351 | $(call if_changed,link_o_target) |
352 | |
353 | targets += $(builtin-target) |
354 | endif # builtin-target |
355 | |
356 | # |
357 | # Rule to create modules.order file |
358 | # |
359 | # Create commands to either record .ko file or cat modules.order from |
360 | # a subdirectory |
361 | modorder-cmds = \ |
362 | $(foreach m, $(modorder), \ |
363 | $(if $(filter %/modules.order, $m), \ |
364 | cat $m;, echo kernel/$m;)) |
365 | |
366 | $(modorder-target): $(subdir-ym) FORCE |
367 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
368 | |
369 | # |
370 | # Rule to compile a set of .o files into one .a file |
371 | # |
372 | ifdef lib-target |
373 | quiet_cmd_link_l_target = AR $@ |
374 | cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y) |
375 | |
376 | $(lib-target): $(lib-y) FORCE |
377 | $(call if_changed,link_l_target) |
378 | |
379 | targets += $(lib-target) |
380 | endif |
381 | |
382 | # |
383 | # Rule to link composite objects |
384 | # |
385 | # Composite objects are specified in kbuild makefile as follows: |
386 | # <composite-object>-objs := <list of .o files> |
387 | # or |
388 | # <composite-object>-y := <list of .o files> |
389 | link_multi_deps = \ |
390 | $(filter $(addprefix $(obj)/, \ |
391 | $($(subst $(obj)/,,$(@:.o=-objs))) \ |
392 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) |
393 | |
394 | quiet_cmd_link_multi-y = LD $@ |
395 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
396 | |
397 | quiet_cmd_link_multi-m = LD [M] $@ |
398 | cmd_link_multi-m = $(cmd_link_multi-y) |
399 | |
400 | # We would rather have a list of rules like |
401 | # foo.o: $(foo-objs) |
402 | # but that's not so easy, so we rather make all composite objects depend |
403 | # on the set of all their parts |
404 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE |
405 | $(call if_changed,link_multi-y) |
406 | |
407 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE |
408 | $(call if_changed,link_multi-m) |
409 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
410 | |
411 | targets += $(multi-used-y) $(multi-used-m) |
412 | |
413 | |
414 | # Descending |
415 | # --------------------------------------------------------------------------- |
416 | |
417 | PHONY += $(subdir-ym) |
418 | $(subdir-ym): |
419 | $(Q)$(MAKE) $(build)=$@ |
420 | |
421 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
422 | # --------------------------------------------------------------------------- |
423 | |
424 | PHONY += FORCE |
425 | |
426 | FORCE: |
427 | |
428 | # Read all saved command lines and dependencies for the $(targets) we |
429 | # may be building above, using $(if_changed{,_dep}). As an |
430 | # optimization, we don't need to read them if the target does not |
431 | # exist, we will rebuild anyway in that case. |
432 | |
433 | targets := $(wildcard $(sort $(targets))) |
434 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
435 | |
436 | ifneq ($(cmd_files),) |
437 | include $(cmd_files) |
438 | endif |
439 | |
440 | # Declare the contents of the .PHONY variable as phony. We keep that |
441 | # information in a variable se we can use it in if_changed and friends. |
442 | |
443 | .PHONY: $(PHONY) |
444 |
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Tags:
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