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Commit | Line | Data |
---|---|---|
22433fc5 MY |
1 | # ========================================================================== |
2 | # Building | |
3 | # ========================================================================== | |
4 | ||
6825a95b MY |
5 | # Modified for U-Boot |
6 | ifeq ($(CONFIG_TPL_BUILD),y) | |
7 | src := $(patsubst tpl/%,%,$(obj)) | |
8 | else | |
9 | ifeq ($(CONFIG_SPL_BUILD),y) | |
10 | src := $(patsubst spl/%,%,$(obj)) | |
11 | else | |
12 | src := $(obj) | |
13 | endif | |
14 | endif | |
22433fc5 MY |
15 | |
16 | PHONY := __build | |
17 | __build: | |
18 | ||
19 | # Init all relevant variables used in kbuild files so | |
20 | # 1) they have correct type | |
21 | # 2) they do not inherit any value from the environment | |
22 | obj-y := | |
23 | obj-m := | |
24 | lib-y := | |
25 | lib-m := | |
26 | always := | |
27 | targets := | |
28 | subdir-y := | |
29 | subdir-m := | |
30 | EXTRA_AFLAGS := | |
31 | EXTRA_CFLAGS := | |
32 | EXTRA_CPPFLAGS := | |
33 | EXTRA_LDFLAGS := | |
34 | asflags-y := | |
35 | ccflags-y := | |
36 | cppflags-y := | |
37 | ldflags-y := | |
38 | ||
39 | subdir-asflags-y := | |
40 | subdir-ccflags-y := | |
41 | ||
42 | # Read auto.conf if it exists, otherwise ignore | |
43 | -include include/config/auto.conf | |
44 | ||
01072b44 MY |
45 | # Added for U-Boot: Load U-Boot configuration |
46 | ifeq ($(CONFIG_TPL_BUILD),y) | |
47 | -include include/tpl-autoconf.mk | |
48 | else | |
49 | ifeq ($(CONFIG_SPL_BUILD),y) | |
50 | -include include/spl-autoconf.mk | |
51 | else | |
52 | -include include/autoconf.mk | |
53 | endif | |
54 | endif | |
55 | ||
22433fc5 MY |
56 | include scripts/Kbuild.include |
57 | ||
58 | # For backward compatibility check that these variables do not change | |
59 | save-cflags := $(CFLAGS) | |
60 | ||
61 | # The filename Kbuild has precedence over Makefile | |
62 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) | |
63 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) | |
64 | include $(kbuild-file) | |
65 | ||
026f9cf2 MY |
66 | # Added for U-Boot |
67 | asflags-y += $(PLATFORM_CPPFLAGS) | |
68 | ccflags-y += $(PLATFORM_CPPFLAGS) | |
69 | cppflags-y += $(PLATFORM_CPPFLAGS) | |
70 | ||
22433fc5 MY |
71 | # If the save-* variables changed error out |
72 | ifeq ($(KBUILD_NOPEDANTIC),) | |
73 | ifneq ("$(save-cflags)","$(CFLAGS)") | |
74 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) | |
75 | endif | |
76 | endif | |
77 | ||
78 | # | |
79 | # make W=... settings | |
80 | # | |
81 | # W=1 - warnings that may be relevant and does not occur too often | |
82 | # W=2 - warnings that occur quite often but may still be relevant | |
83 | # W=3 - the more obscure warnings, can most likely be ignored | |
84 | # | |
85 | # $(call cc-option, -W...) handles gcc -W.. options which | |
86 | # are not supported by all versions of the compiler | |
87 | ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS | |
88 | warning- := $(empty) | |
89 | ||
90 | warning-1 := -Wextra -Wunused -Wno-unused-parameter | |
91 | warning-1 += -Wmissing-declarations | |
92 | warning-1 += -Wmissing-format-attribute | |
598e2d33 | 93 | warning-1 += $(call cc-option, -Wmissing-prototypes) |
22433fc5 MY |
94 | warning-1 += -Wold-style-definition |
95 | warning-1 += $(call cc-option, -Wmissing-include-dirs) | |
96 | warning-1 += $(call cc-option, -Wunused-but-set-variable) | |
97 | warning-1 += $(call cc-disable-warning, missing-field-initializers) | |
98 | ||
598e2d33 MY |
99 | # Clang |
100 | warning-1 += $(call cc-disable-warning, initializer-overrides) | |
101 | warning-1 += $(call cc-disable-warning, unused-value) | |
102 | warning-1 += $(call cc-disable-warning, format) | |
103 | warning-1 += $(call cc-disable-warning, unknown-warning-option) | |
104 | warning-1 += $(call cc-disable-warning, sign-compare) | |
105 | warning-1 += $(call cc-disable-warning, format-zero-length) | |
106 | warning-1 += $(call cc-disable-warning, uninitialized) | |
107 | warning-1 += $(call cc-option, -fcatch-undefined-behavior) | |
108 | ||
22433fc5 MY |
109 | warning-2 := -Waggregate-return |
110 | warning-2 += -Wcast-align | |
111 | warning-2 += -Wdisabled-optimization | |
112 | warning-2 += -Wnested-externs | |
113 | warning-2 += -Wshadow | |
114 | warning-2 += $(call cc-option, -Wlogical-op) | |
115 | warning-2 += $(call cc-option, -Wmissing-field-initializers) | |
116 | ||
117 | warning-3 := -Wbad-function-cast | |
118 | warning-3 += -Wcast-qual | |
119 | warning-3 += -Wconversion | |
120 | warning-3 += -Wpacked | |
121 | warning-3 += -Wpadded | |
122 | warning-3 += -Wpointer-arith | |
123 | warning-3 += -Wredundant-decls | |
124 | warning-3 += -Wswitch-default | |
125 | warning-3 += $(call cc-option, -Wpacked-bitfield-compat) | |
126 | warning-3 += $(call cc-option, -Wvla) | |
127 | ||
128 | warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | |
129 | warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | |
130 | warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | |
131 | ||
132 | ifeq ("$(strip $(warning))","") | |
133 | $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) | |
134 | endif | |
135 | ||
136 | KBUILD_CFLAGS += $(warning) | |
137 | endif | |
138 | ||
139 | include scripts/Makefile.lib | |
140 | ||
141 | ifdef host-progs | |
142 | ifneq ($(hostprogs-y),$(host-progs)) | |
143 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) | |
144 | hostprogs-y += $(host-progs) | |
145 | endif | |
146 | endif | |
147 | ||
148 | # Do not include host rules unless needed | |
149 | ifneq ($(hostprogs-y)$(hostprogs-m),) | |
150 | include scripts/Makefile.host | |
151 | endif | |
152 | ||
6825a95b MY |
153 | # Uncommented for U-Boot |
154 | # We need to create output dicrectory for SPL and TPL even for in-tree build | |
155 | #ifneq ($(KBUILD_SRC),) | |
22433fc5 MY |
156 | # Create output directory if not already present |
157 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) | |
158 | ||
159 | # Create directories for object files if directory does not exist | |
160 | # Needed when obj-y := dir/file.o syntax is used | |
161 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) | |
6825a95b | 162 | #endif |
22433fc5 MY |
163 | |
164 | ifndef obj | |
165 | $(warning kbuild: Makefile.build is included improperly) | |
166 | endif | |
167 | ||
168 | # =========================================================================== | |
169 | ||
170 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) | |
171 | lib-target := $(obj)/lib.a | |
172 | endif | |
173 | ||
174 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) | |
175 | builtin-target := $(obj)/built-in.o | |
176 | endif | |
177 | ||
178 | modorder-target := $(obj)/modules.order | |
179 | ||
180 | # We keep a list of all modules in $(MODVERDIR) | |
181 | ||
182 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ | |
183 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ | |
184 | $(subdir-ym) $(always) | |
185 | @: | |
186 | ||
187 | # Linus' kernel sanity checking tool | |
188 | ifneq ($(KBUILD_CHECKSRC),0) | |
189 | ifeq ($(KBUILD_CHECKSRC),2) | |
190 | quiet_cmd_force_checksrc = CHECK $< | |
191 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
192 | else | |
193 | quiet_cmd_checksrc = CHECK $< | |
194 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
195 | endif | |
196 | endif | |
197 | ||
198 | # Do section mismatch analysis for each module/built-in.o | |
199 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
200 | cmd_secanalysis = ; scripts/mod/modpost $@ | |
201 | endif | |
202 | ||
203 | # Compile C sources (.c) | |
204 | # --------------------------------------------------------------------------- | |
205 | ||
206 | # Default is built-in, unless we know otherwise | |
207 | modkern_cflags = \ | |
208 | $(if $(part-of-module), \ | |
209 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ | |
210 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) | |
211 | quiet_modtag := $(empty) $(empty) | |
212 | ||
213 | $(real-objs-m) : part-of-module := y | |
214 | $(real-objs-m:.o=.i) : part-of-module := y | |
215 | $(real-objs-m:.o=.s) : part-of-module := y | |
216 | $(real-objs-m:.o=.lst): part-of-module := y | |
217 | ||
218 | $(real-objs-m) : quiet_modtag := [M] | |
219 | $(real-objs-m:.o=.i) : quiet_modtag := [M] | |
220 | $(real-objs-m:.o=.s) : quiet_modtag := [M] | |
221 | $(real-objs-m:.o=.lst): quiet_modtag := [M] | |
222 | ||
223 | $(obj-m) : quiet_modtag := [M] | |
224 | ||
225 | # Default for not multi-part modules | |
226 | modname = $(basetarget) | |
227 | ||
228 | $(multi-objs-m) : modname = $(modname-multi) | |
229 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) | |
230 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) | |
231 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) | |
232 | $(multi-objs-y) : modname = $(modname-multi) | |
233 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) | |
234 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) | |
235 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) | |
236 | ||
237 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ | |
598e2d33 | 238 | cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
22433fc5 MY |
239 | |
240 | $(obj)/%.s: $(src)/%.c FORCE | |
241 | $(call if_changed_dep,cc_s_c) | |
242 | ||
243 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ | |
244 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< | |
245 | ||
246 | $(obj)/%.i: $(src)/%.c FORCE | |
247 | $(call if_changed_dep,cc_i_c) | |
248 | ||
249 | cmd_gensymtypes = \ | |
250 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ | |
251 | $(GENKSYMS) $(if $(1), -T $(2)) \ | |
252 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ | |
253 | $(if $(KBUILD_PRESERVE),-p) \ | |
254 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) | |
255 | ||
256 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ | |
257 | cmd_cc_symtypes_c = \ | |
258 | set -e; \ | |
259 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ | |
260 | test -s $@ || rm -f $@ | |
261 | ||
262 | $(obj)/%.symtypes : $(src)/%.c FORCE | |
263 | $(call cmd,cc_symtypes_c) | |
264 | ||
265 | # C (.c) files | |
266 | # The C file is compiled and updated dependency information is generated. | |
267 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
268 | ||
269 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
270 | ||
271 | ifndef CONFIG_MODVERSIONS | |
272 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
273 | ||
274 | else | |
275 | # When module versioning is enabled the following steps are executed: | |
276 | # o compile a .tmp_<file>.o from <file>.c | |
277 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does | |
278 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and | |
279 | # are done. | |
280 | # o otherwise, we calculate symbol versions using the good old | |
281 | # genksyms on the preprocessed source and postprocess them in a way | |
282 | # that they are usable as a linker script | |
283 | # o generate <file>.o from .tmp_<file>.o using the linker to | |
284 | # replace the unresolved symbols __crc_exported_symbol with | |
285 | # the actual value of the checksum generated by genksyms | |
286 | ||
287 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< | |
288 | cmd_modversions = \ | |
289 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ | |
290 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ | |
291 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
292 | \ | |
293 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ | |
294 | -T $(@D)/.tmp_$(@F:.o=.ver); \ | |
295 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ | |
296 | else \ | |
297 | mv -f $(@D)/.tmp_$(@F) $@; \ | |
298 | fi; | |
299 | endif | |
300 | ||
301 | ifdef CONFIG_FTRACE_MCOUNT_RECORD | |
302 | ifdef BUILD_C_RECORDMCOUNT | |
303 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") | |
304 | RECORDMCOUNT_FLAGS = -w | |
305 | endif | |
306 | # Due to recursion, we must skip empty.o. | |
307 | # The empty.o file is created in the make process in order to determine | |
308 | # the target endianness and word size. It is made before all other C | |
309 | # files, including recordmcount. | |
310 | sub_cmd_record_mcount = \ | |
311 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
312 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ | |
313 | fi; | |
314 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ | |
315 | $(srctree)/scripts/recordmcount.h | |
316 | else | |
317 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ | |
318 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ | |
319 | "$(if $(CONFIG_64BIT),64,32)" \ | |
320 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ | |
321 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ | |
322 | "$(if $(part-of-module),1,0)" "$(@)"; | |
323 | recordmcount_source := $(srctree)/scripts/recordmcount.pl | |
324 | endif | |
325 | cmd_record_mcount = \ | |
326 | if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ | |
327 | $(sub_cmd_record_mcount) \ | |
328 | fi; | |
329 | endif | |
330 | ||
331 | define rule_cc_o_c | |
332 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ | |
333 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ | |
334 | $(cmd_modversions) \ | |
335 | $(call echo-cmd,record_mcount) \ | |
336 | $(cmd_record_mcount) \ | |
337 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ | |
338 | $(dot-target).tmp; \ | |
339 | rm -f $(depfile); \ | |
340 | mv -f $(dot-target).tmp $(dot-target).cmd | |
341 | endef | |
342 | ||
343 | # Built-in and composite module parts | |
344 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE | |
345 | $(call cmd,force_checksrc) | |
346 | $(call if_changed_rule,cc_o_c) | |
347 | ||
348 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
349 | ||
350 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE | |
351 | $(call cmd,force_checksrc) | |
352 | $(call if_changed_rule,cc_o_c) | |
353 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) | |
354 | ||
355 | quiet_cmd_cc_lst_c = MKLST $@ | |
356 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
357 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
358 | System.map $(OBJDUMP) > $@ | |
359 | ||
360 | $(obj)/%.lst: $(src)/%.c FORCE | |
361 | $(call if_changed_dep,cc_lst_c) | |
362 | ||
363 | # Compile assembler sources (.S) | |
364 | # --------------------------------------------------------------------------- | |
365 | ||
366 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) | |
367 | ||
368 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
369 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
370 | ||
371 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ | |
45f0ad95 | 372 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
22433fc5 MY |
373 | |
374 | $(obj)/%.s: $(src)/%.S FORCE | |
375 | $(call if_changed_dep,as_s_S) | |
376 | ||
377 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
378 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
379 | ||
380 | $(obj)/%.o: $(src)/%.S FORCE | |
381 | $(call if_changed_dep,as_o_S) | |
382 | ||
383 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) | |
384 | targets += $(extra-y) $(MAKECMDGOALS) $(always) | |
385 | ||
386 | # Linker scripts preprocessor (.lds.S -> .lds) | |
387 | # --------------------------------------------------------------------------- | |
388 | quiet_cmd_cpp_lds_S = LDS $@ | |
389 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ | |
390 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< | |
391 | ||
392 | $(obj)/%.lds: $(src)/%.lds.S FORCE | |
393 | $(call if_changed_dep,cpp_lds_S) | |
394 | ||
395 | # ASN.1 grammar | |
396 | # --------------------------------------------------------------------------- | |
397 | quiet_cmd_asn1_compiler = ASN.1 $@ | |
398 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ | |
399 | $(subst .h,.c,$@) $(subst .c,.h,$@) | |
400 | ||
401 | .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h | |
402 | ||
403 | $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler | |
404 | $(call cmd,asn1_compiler) | |
405 | ||
406 | # Build the compiled-in targets | |
407 | # --------------------------------------------------------------------------- | |
408 | ||
409 | # To build objects in subdirs, we need to descend into the directories | |
410 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
411 | ||
412 | # | |
413 | # Rule to compile a set of .o files into one .o file | |
414 | # | |
415 | ifdef builtin-target | |
416 | quiet_cmd_link_o_target = LD $@ | |
417 | # If the list of objects to link is empty, just create an empty built-in.o | |
418 | cmd_link_o_target = $(if $(strip $(obj-y)),\ | |
419 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ | |
420 | $(cmd_secanalysis),\ | |
421 | rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) | |
422 | ||
423 | $(builtin-target): $(obj-y) FORCE | |
424 | $(call if_changed,link_o_target) | |
425 | ||
426 | targets += $(builtin-target) | |
427 | endif # builtin-target | |
428 | ||
429 | # | |
430 | # Rule to create modules.order file | |
431 | # | |
432 | # Create commands to either record .ko file or cat modules.order from | |
433 | # a subdirectory | |
434 | modorder-cmds = \ | |
435 | $(foreach m, $(modorder), \ | |
436 | $(if $(filter %/modules.order, $m), \ | |
437 | cat $m;, echo kernel/$m;)) | |
438 | ||
439 | $(modorder-target): $(subdir-ym) FORCE | |
440 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
441 | ||
442 | # | |
443 | # Rule to compile a set of .o files into one .a file | |
444 | # | |
445 | ifdef lib-target | |
446 | quiet_cmd_link_l_target = AR $@ | |
447 | cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) | |
448 | ||
449 | $(lib-target): $(lib-y) FORCE | |
450 | $(call if_changed,link_l_target) | |
451 | ||
452 | targets += $(lib-target) | |
453 | endif | |
454 | ||
455 | # | |
456 | # Rule to link composite objects | |
457 | # | |
458 | # Composite objects are specified in kbuild makefile as follows: | |
459 | # <composite-object>-objs := <list of .o files> | |
460 | # or | |
461 | # <composite-object>-y := <list of .o files> | |
462 | link_multi_deps = \ | |
463 | $(filter $(addprefix $(obj)/, \ | |
464 | $($(subst $(obj)/,,$(@:.o=-objs))) \ | |
465 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) | |
45f0ad95 | 466 | |
22433fc5 MY |
467 | quiet_cmd_link_multi-y = LD $@ |
468 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) | |
469 | ||
470 | quiet_cmd_link_multi-m = LD [M] $@ | |
471 | cmd_link_multi-m = $(cmd_link_multi-y) | |
472 | ||
473 | # We would rather have a list of rules like | |
474 | # foo.o: $(foo-objs) | |
475 | # but that's not so easy, so we rather make all composite objects depend | |
476 | # on the set of all their parts | |
477 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE | |
478 | $(call if_changed,link_multi-y) | |
479 | ||
480 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE | |
481 | $(call if_changed,link_multi-m) | |
482 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) | |
483 | ||
484 | targets += $(multi-used-y) $(multi-used-m) | |
485 | ||
486 | ||
487 | # Descending | |
488 | # --------------------------------------------------------------------------- | |
489 | ||
490 | PHONY += $(subdir-ym) | |
491 | $(subdir-ym): | |
492 | $(Q)$(MAKE) $(build)=$@ | |
493 | ||
494 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
495 | # --------------------------------------------------------------------------- | |
496 | ||
497 | PHONY += FORCE | |
498 | ||
499 | FORCE: | |
500 | ||
501 | # Read all saved command lines and dependencies for the $(targets) we | |
502 | # may be building above, using $(if_changed{,_dep}). As an | |
503 | # optimization, we don't need to read them if the target does not | |
504 | # exist, we will rebuild anyway in that case. | |
505 | ||
506 | targets := $(wildcard $(sort $(targets))) | |
507 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
508 | ||
509 | ifneq ($(cmd_files),) | |
510 | include $(cmd_files) | |
511 | endif | |
512 | ||
513 | # Declare the contents of the .PHONY variable as phony. We keep that | |
514 | # information in a variable se we can use it in if_changed and friends. | |
515 | ||
516 | .PHONY: $(PHONY) |