Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | # ========================================================================== |
3 | # Building | |
4 | # ========================================================================== | |
5 | ||
6 | src := $(obj) | |
7 | ||
4f193362 | 8 | PHONY := __build |
1da177e4 LT |
9 | __build: |
10 | ||
d72e5edb SR |
11 | # Init all relevant variables used in kbuild files so |
12 | # 1) they have correct type | |
13 | # 2) they do not inherit any value from the environment | |
14 | obj-y := | |
15 | obj-m := | |
16 | lib-y := | |
17 | lib-m := | |
18 | always := | |
5f2fb52f MY |
19 | always-y := |
20 | always-m := | |
d72e5edb SR |
21 | targets := |
22 | subdir-y := | |
23 | subdir-m := | |
24 | EXTRA_AFLAGS := | |
25 | EXTRA_CFLAGS := | |
26 | EXTRA_CPPFLAGS := | |
27 | EXTRA_LDFLAGS := | |
f77bf014 SR |
28 | asflags-y := |
29 | ccflags-y := | |
30 | cppflags-y := | |
31 | ldflags-y := | |
d72e5edb | 32 | |
720097d8 SR |
33 | subdir-asflags-y := |
34 | subdir-ccflags-y := | |
35 | ||
3156fd05 | 36 | # Read auto.conf if it exists, otherwise ignore |
c955ccaf | 37 | -include include/config/auto.conf |
1da177e4 | 38 | |
20a468b5 SR |
39 | include scripts/Kbuild.include |
40 | ||
2a691470 | 41 | # The filename Kbuild has precedence over Makefile |
db8c1a7b | 42 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
0c53c8e6 SR |
43 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
44 | include $(kbuild-file) | |
45 | ||
1da177e4 LT |
46 | include scripts/Makefile.lib |
47 | ||
85569d19 MY |
48 | # Do not include hostprogs rules unless needed. |
49 | # $(sort ...) is used here to remove duplicated words and excessive spaces. | |
50 | hostprogs := $(sort $(hostprogs)) | |
42640b13 | 51 | ifneq ($(hostprogs),) |
1da177e4 LT |
52 | include scripts/Makefile.host |
53 | endif | |
54 | ||
7f3a59db | 55 | # Do not include userprogs rules unless needed. |
85569d19 | 56 | # $(sort ...) is used here to remove duplicated words and excessive spaces. |
7f3a59db MY |
57 | userprogs := $(sort $(userprogs)) |
58 | ifneq ($(userprogs),) | |
59 | include scripts/Makefile.userprogs | |
60 | endif | |
61 | ||
1da177e4 LT |
62 | ifndef obj |
63 | $(warning kbuild: Makefile.build is included improperly) | |
64 | endif | |
65 | ||
394053f4 | 66 | ifeq ($(need-modorder),) |
c07d8d47 MY |
67 | ifneq ($(obj-m),) |
68 | $(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.) | |
69 | $(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.) | |
70 | endif | |
71 | endif | |
72 | ||
1da177e4 LT |
73 | # =========================================================================== |
74 | ||
454753d9 | 75 | # subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...) |
aaa385ba | 76 | subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y))) |
b2c88554 | 77 | subdir-modorder := $(sort $(filter %/modules.order, $(obj-m))) |
6ba3bcb0 | 78 | |
f3908ab3 MY |
79 | targets-for-builtin := $(extra-y) |
80 | ||
a4954fd7 | 81 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
f3908ab3 | 82 | targets-for-builtin += $(obj)/lib.a |
1da177e4 LT |
83 | endif |
84 | ||
56d58936 | 85 | ifdef need-builtin |
f3908ab3 | 86 | targets-for-builtin += $(obj)/built-in.a |
1da177e4 LT |
87 | endif |
88 | ||
b2c88554 | 89 | targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m))) |
f3908ab3 | 90 | |
b480fec9 | 91 | ifdef need-modorder |
f3908ab3 | 92 | targets-for-modules += $(obj)/modules.order |
1d8001ef | 93 | endif |
551559e1 | 94 | |
f3908ab3 | 95 | targets += $(targets-for-builtin) $(targets-for-modules) |
9f69a496 | 96 | |
1da177e4 | 97 | # Linus' kernel sanity checking tool |
7d0ea252 MY |
98 | ifeq ($(KBUILD_CHECKSRC),1) |
99 | quiet_cmd_checksrc = CHECK $< | |
e5d28910 | 100 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
7d0ea252 MY |
101 | else ifeq ($(KBUILD_CHECKSRC),2) |
102 | quiet_cmd_force_checksrc = CHECK $< | |
e5d28910 | 103 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
1da177e4 LT |
104 | endif |
105 | ||
e27128db | 106 | ifneq ($(KBUILD_EXTRA_WARN),) |
e5d28910 | 107 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< |
3a025e1d MW |
108 | endif |
109 | ||
1da177e4 LT |
110 | # Compile C sources (.c) |
111 | # --------------------------------------------------------------------------- | |
112 | ||
1da177e4 | 113 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
dc5723b0 | 114 | cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $< |
1da177e4 | 115 | |
767e581d | 116 | $(obj)/%.s: $(src)/%.c FORCE |
1da177e4 LT |
117 | $(call if_changed_dep,cc_s_c) |
118 | ||
23d43848 MY |
119 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
120 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< | |
1da177e4 | 121 | |
767e581d | 122 | $(obj)/%.i: $(src)/%.c FORCE |
23d43848 | 123 | $(call if_changed_dep,cpp_i_c) |
1da177e4 | 124 | |
4efca4ed NP |
125 | # These mirror gensymtypes_S and co below, keep them in synch. |
126 | cmd_gensymtypes_c = \ | |
37a8d9f6 | 127 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
88110713 | 128 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
56067812 | 129 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
37a8d9f6 | 130 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 131 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 132 | |
15fde675 | 133 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 | 134 | cmd_cc_symtypes_c = \ |
4efca4ed | 135 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
37a8d9f6 | 136 | test -s $@ || rm -f $@ |
15fde675 | 137 | |
767e581d | 138 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 139 | $(call cmd,cc_symtypes_c) |
15fde675 | 140 | |
433db3e2 VT |
141 | # LLVM assembly |
142 | # Generate .ll files from .c | |
143 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ | |
144 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< | |
145 | ||
146 | $(obj)/%.ll: $(src)/%.c FORCE | |
147 | $(call if_changed_dep,cc_ll_c) | |
148 | ||
1da177e4 LT |
149 | # C (.c) files |
150 | # The C file is compiled and updated dependency information is generated. | |
151 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
152 | ||
153 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
ee3e46b7 | 154 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
1da177e4 | 155 | |
ee3e46b7 | 156 | ifdef CONFIG_MODVERSIONS |
1da177e4 | 157 | # When module versioning is enabled the following steps are executed: |
ee3e46b7 MY |
158 | # o compile a <file>.o from <file>.c |
159 | # o if <file>.o doesn't contain a __ksymtab version, i.e. does | |
160 | # not export symbols, it's done. | |
1da177e4 LT |
161 | # o otherwise, we calculate symbol versions using the good old |
162 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 | 163 | # that they are usable as a linker script |
ee3e46b7 | 164 | # o generate .tmp_<file>.o from <file>.o using the linker to |
2ea03891 SR |
165 | # replace the unresolved symbols __crc_exported_symbol with |
166 | # the actual value of the checksum generated by genksyms | |
ee3e46b7 | 167 | # o remove .tmp_<file>.o to <file>.o |
4efca4ed | 168 | |
38e89184 ST |
169 | ifdef CONFIG_LTO_CLANG |
170 | # Generate .o.symversions files for each .o with exported symbols, and link these | |
171 | # to the kernel and/or modules at the end. | |
172 | cmd_modversions_c = \ | |
173 | if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \ | |
174 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ | |
175 | > $@.symversions; \ | |
176 | fi; | |
177 | else | |
4efca4ed | 178 | cmd_modversions_c = \ |
ee3e46b7 | 179 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed | 180 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
e26d6b83 DZ |
181 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
182 | \ | |
ee3e46b7 | 183 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
e26d6b83 | 184 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
e26d6b83 | 185 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 186 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 187 | fi |
1da177e4 | 188 | endif |
38e89184 | 189 | endif |
1da177e4 | 190 | |
3b15cdc1 | 191 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
07d04081 | 192 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl |
72441cb1 | 193 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
194 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
195 | RECORDMCOUNT_FLAGS = -w | |
196 | endif | |
d7b4d6de SR |
197 | # Due to recursion, we must skip empty.o. |
198 | # The empty.o file is created in the make process in order to determine | |
312a3d09 C |
199 | # the target endianness and word size. It is made before all other C |
200 | # files, including recordmcount. | |
45677454 WZ |
201 | sub_cmd_record_mcount = \ |
202 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 203 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 204 | fi; |
d6971822 MM |
205 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
206 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 207 | else |
4317ee3b | 208 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 209 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 210 | "$(if $(CONFIG_64BIT),64,32)" \ |
5a4630aa | 211 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
d503ac53 | 212 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
18c167fd | 213 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 214 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
312a3d09 | 215 | endif # BUILD_C_RECORDMCOUNT |
1a49b2fd JL |
216 | cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ |
217 | $(sub_cmd_record_mcount)) | |
3b15cdc1 | 218 | endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
8da3821b | 219 | |
b9ab5ebb | 220 | ifdef CONFIG_STACK_VALIDATION |
b1a1a1a0 | 221 | ifndef CONFIG_LTO_CLANG |
3b27a0c8 | 222 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
223 | |
224 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
225 | ||
b9ab5ebb JP |
226 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
227 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
228 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
229 | cmd_objtool = $(if $(patsubst y%,, \ | |
230 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
e5d28910 | 231 | $(__objtool_obj) $(objtool_args) $@) |
b9ab5ebb JP |
232 | objtool_obj = $(if $(patsubst y%,, \ |
233 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
234 | $(__objtool_obj)) | |
235 | ||
3b27a0c8 | 236 | endif # SKIP_STACK_VALIDATION |
b1a1a1a0 | 237 | endif # CONFIG_LTO_CLANG |
b9ab5ebb JP |
238 | endif # CONFIG_STACK_VALIDATION |
239 | ||
ee9f8fce JP |
240 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
241 | objtool_dep = $(objtool_obj) \ | |
242 | $(wildcard include/config/orc/unwinder.h \ | |
243 | include/config/stack/validation.h) | |
244 | ||
bbda5ec6 MY |
245 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
246 | cmd_gen_ksymdeps = \ | |
e5d28910 | 247 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
7d32358b MY |
248 | |
249 | # List module undefined symbols | |
250 | undefined_syms = $(NM) $< | $(AWK) '$$1 == "U" { printf("%s%s", x++ ? " " : "", $$2) }'; | |
bbda5ec6 MY |
251 | endif |
252 | ||
1da177e4 | 253 | define rule_cc_o_c |
3a2429e1 MY |
254 | $(call cmd_and_fixdep,cc_o_c) |
255 | $(call cmd,gen_ksymdeps) | |
0c33f125 | 256 | $(call cmd,checksrc) |
3a2429e1 MY |
257 | $(call cmd,checkdoc) |
258 | $(call cmd,objtool) | |
259 | $(call cmd,modversions_c) | |
260 | $(call cmd,record_mcount) | |
1da177e4 LT |
261 | endef |
262 | ||
b9ab5ebb | 263 | define rule_as_o_S |
3a2429e1 MY |
264 | $(call cmd_and_fixdep,as_o_S) |
265 | $(call cmd,gen_ksymdeps) | |
266 | $(call cmd,objtool) | |
267 | $(call cmd,modversions_S) | |
b9ab5ebb JP |
268 | endef |
269 | ||
1da177e4 | 270 | # Built-in and composite module parts |
ee9f8fce | 271 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 | 272 | $(call if_changed_rule,cc_o_c) |
0c33f125 | 273 | $(call cmd,force_checksrc) |
1da177e4 | 274 | |
9f69a496 MY |
275 | cmd_mod = { \ |
276 | echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \ | |
7d32358b | 277 | $(undefined_syms) echo; \ |
9f69a496 MY |
278 | } > $@ |
279 | ||
280 | $(obj)/%.mod: $(obj)/%.o FORCE | |
281 | $(call if_changed,mod) | |
282 | ||
1da177e4 LT |
283 | quiet_cmd_cc_lst_c = MKLST $@ |
284 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
285 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
286 | System.map $(OBJDUMP) > $@ | |
287 | ||
767e581d | 288 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
289 | $(call if_changed_dep,cc_lst_c) |
290 | ||
291 | # Compile assembler sources (.S) | |
292 | # --------------------------------------------------------------------------- | |
293 | ||
4efca4ed NP |
294 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
295 | # or a file that it includes, in order to get versioned symbols. We build a | |
296 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
297 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
298 | # | |
299 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
300 | # expand names, then the resulting exports must be constructed into plain | |
301 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
302 | # to make the genksyms input. | |
303 | # | |
304 | # These mirror gensymtypes_c and co above, keep them in synch. | |
305 | cmd_gensymtypes_S = \ | |
b79c6aa6 | 306 | { echo "\#include <linux/kernel.h>" ; \ |
4efca4ed NP |
307 | echo "\#include <asm/asm-prototypes.h>" ; \ |
308 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 | 309 | grep "\<___EXPORT_SYMBOL\>" | \ |
b79c6aa6 | 310 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ |
4efca4ed | 311 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
88110713 | 312 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
56067812 | 313 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
4efca4ed NP |
314 | $(if $(KBUILD_PRESERVE),-p) \ |
315 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) | |
316 | ||
317 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
318 | cmd_cc_symtypes_S = \ | |
4efca4ed NP |
319 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
320 | test -s $@ || rm -f $@ | |
321 | ||
322 | $(obj)/%.symtypes : $(src)/%.S FORCE | |
323 | $(call cmd,cc_symtypes_S) | |
324 | ||
325 | ||
e0f41e52 MY |
326 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
327 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 328 | |
767e581d | 329 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 330 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
331 | |
332 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
ee3e46b7 | 333 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
4efca4ed | 334 | |
2ff2b7ec | 335 | ifdef CONFIG_ASM_MODVERSIONS |
4efca4ed NP |
336 | |
337 | # versioning matches the C process described above, with difference that | |
338 | # we parse asm-prototypes.h C header to get function definitions. | |
339 | ||
4efca4ed | 340 | cmd_modversions_S = \ |
ee3e46b7 | 341 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed NP |
342 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
343 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
344 | \ | |
ee3e46b7 | 345 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
4efca4ed | 346 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
4efca4ed | 347 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 348 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 349 | fi |
4efca4ed | 350 | endif |
1da177e4 | 351 | |
ee9f8fce | 352 | $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE |
b9ab5ebb | 353 | $(call if_changed_rule,as_o_S) |
1da177e4 | 354 | |
b2c88554 MY |
355 | targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |
356 | targets += $(filter-out $(subdir-modorder), $(real-obj-m)) | |
357 | targets += $(lib-y) $(always-y) $(MAKECMDGOALS) | |
1da177e4 LT |
358 | |
359 | # Linker scripts preprocessor (.lds.S -> .lds) | |
360 | # --------------------------------------------------------------------------- | |
361 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 362 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 363 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 364 | |
767e581d | 365 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
366 | $(call if_changed_dep,cpp_lds_S) |
367 | ||
4520c6a4 DH |
368 | # ASN.1 grammar |
369 | # --------------------------------------------------------------------------- | |
49d5089d | 370 | quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch] |
4520c6a4 | 371 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
49d5089d | 372 | $(basename $@).c $(basename $@).h |
4520c6a4 | 373 | |
4fa8bc94 | 374 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
375 | $(call cmd,asn1_compiler) |
376 | ||
1da177e4 LT |
377 | # Build the compiled-in targets |
378 | # --------------------------------------------------------------------------- | |
379 | ||
380 | # To build objects in subdirs, we need to descend into the directories | |
aaa385ba | 381 | $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ; |
454753d9 | 382 | $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; |
1da177e4 | 383 | |
38e89184 ST |
384 | # combine symversions for later processing |
385 | quiet_cmd_update_lto_symversions = SYMVER $@ | |
386 | ifeq ($(CONFIG_LTO_CLANG) $(CONFIG_MODVERSIONS),y y) | |
387 | cmd_update_lto_symversions = \ | |
388 | rm -f $@.symversions \ | |
389 | $(foreach n, $(filter-out FORCE,$^), \ | |
390 | $(if $(wildcard $(n).symversions), \ | |
391 | ; cat $(n).symversions >> $@.symversions)) | |
392 | else | |
393 | cmd_update_lto_symversions = echo >/dev/null | |
394 | endif | |
395 | ||
1da177e4 | 396 | # |
dee94953 | 397 | # Rule to compile a set of .o files into one .a file (without symbol table) |
1da177e4 | 398 | # |
a5967db9 | 399 | |
5e18f029 | 400 | quiet_cmd_ar_builtin = AR $@ |
13dc8c02 | 401 | cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs) |
1da177e4 | 402 | |
38e89184 ST |
403 | quiet_cmd_ar_and_symver = AR $@ |
404 | cmd_ar_and_symver = $(cmd_update_lto_symversions); $(cmd_ar_builtin) | |
405 | ||
e578edc7 | 406 | $(obj)/built-in.a: $(real-obj-y) FORCE |
38e89184 | 407 | $(call if_changed,ar_and_symver) |
1da177e4 | 408 | |
551559e1 TH |
409 | # |
410 | # Rule to create modules.order file | |
411 | # | |
412 | # Create commands to either record .ko file or cat modules.order from | |
413 | # a subdirectory | |
b2c88554 MY |
414 | # Add $(obj-m) as the prerequisite to avoid updating the timestamp of |
415 | # modules.order unless contained modules are updated. | |
416 | ||
417 | cmd_modules_order = { $(foreach m, $(real-prereqs), \ | |
418 | $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \ | |
e0e1b1ec | 419 | | $(AWK) '!x[$$0]++' - > $@ |
551559e1 | 420 | |
b2c88554 MY |
421 | $(obj)/modules.order: $(obj-m) FORCE |
422 | $(call if_changed,modules_order) | |
423 | ||
1da177e4 | 424 | # |
dee94953 | 425 | # Rule to compile a set of .o files into one .a file (with symbol table) |
1da177e4 | 426 | # |
38e89184 ST |
427 | quiet_cmd_ar_lib = AR $@ |
428 | cmd_ar_lib = $(cmd_update_lto_symversions); $(cmd_ar) | |
429 | ||
e578edc7 | 430 | $(obj)/lib.a: $(lib-y) FORCE |
38e89184 | 431 | $(call if_changed,ar_lib) |
1da177e4 | 432 | |
afa974b7 MY |
433 | # NOTE: |
434 | # Do not replace $(filter %.o,^) with $(real-prereqs). When a single object | |
435 | # module is turned into a multi object module, $^ will contain header file | |
436 | # dependencies recorded in the .*.cmd file. | |
dc5723b0 ST |
437 | ifdef CONFIG_LTO_CLANG |
438 | quiet_cmd_link_multi-m = AR [M] $@ | |
439 | cmd_link_multi-m = \ | |
38e89184 | 440 | $(cmd_update_lto_symversions); \ |
dc5723b0 ST |
441 | rm -f $@; \ |
442 | $(AR) cDPrsT $@ $(filter %.o,$^) | |
443 | else | |
1da177e4 | 444 | quiet_cmd_link_multi-m = LD [M] $@ |
b7dca6dd | 445 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) |
dc5723b0 | 446 | endif |
1da177e4 | 447 | |
c8589d1e | 448 | $(multi-used-m): FORCE |
1da177e4 | 449 | $(call if_changed,link_multi-m) |
cf4f2193 | 450 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 | 451 | |
f98fe47c | 452 | targets += $(multi-used-m) |
591f6689 | 453 | targets := $(filter-out $(PHONY), $(targets)) |
1da177e4 | 454 | |
b23d1a24 MY |
455 | # Add intermediate targets: |
456 | # When building objects with specific suffix patterns, add intermediate | |
457 | # targets that the final targets are derived from. | |
458 | intermediate_targets = $(foreach sfx, $(2), \ | |
459 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
460 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 461 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 462 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
b23d1a24 MY |
463 | # %.lex.o <- %.lex.c <- %.l |
464 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
465 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
466 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
a7f92419 | 467 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
468 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
469 | ||
394053f4 MY |
470 | # Build |
471 | # --------------------------------------------------------------------------- | |
472 | ||
473 | ifdef single-build | |
474 | ||
20312629 MY |
475 | KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS)) |
476 | ||
394053f4 MY |
477 | curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ |
478 | $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x)))) | |
479 | ||
480 | # Handle single targets without any rule: show "Nothing to be done for ..." or | |
481 | # "No rule to make target ..." depending on whether the target exists. | |
482 | unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ | |
20312629 | 483 | $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) |
394053f4 | 484 | |
2dffd23f MY |
485 | single-subdirs := $(foreach d, $(subdir-ym), \ |
486 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
487 | ||
488 | __build: $(curdir-single) $(single-subdirs) | |
394053f4 MY |
489 | ifneq ($(unknown-single),) |
490 | $(Q)$(MAKE) -f /dev/null $(unknown-single) | |
491 | endif | |
492 | @: | |
493 | ||
494 | ifeq ($(curdir-single),) | |
495 | # Nothing to do in this directory. Do not include any .*.cmd file for speed-up | |
496 | targets := | |
497 | else | |
498 | targets += $(curdir-single) | |
499 | endif | |
500 | ||
501 | else | |
502 | ||
f3908ab3 MY |
503 | __build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ |
504 | $(if $(KBUILD_MODULES), $(targets-for-modules)) \ | |
5f2fb52f | 505 | $(subdir-ym) $(always-y) |
394053f4 MY |
506 | @: |
507 | ||
508 | endif | |
509 | ||
1da177e4 LT |
510 | # Descending |
511 | # --------------------------------------------------------------------------- | |
512 | ||
4f193362 | 513 | PHONY += $(subdir-ym) |
1da177e4 | 514 | $(subdir-ym): |
d9f78edf | 515 | $(Q)$(MAKE) $(build)=$@ \ |
394053f4 | 516 | $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \ |
aaa385ba | 517 | need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ |
454753d9 | 518 | need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) |
1da177e4 LT |
519 | |
520 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
521 | # --------------------------------------------------------------------------- | |
522 | ||
4f193362 | 523 | PHONY += FORCE |
1da177e4 LT |
524 | |
525 | FORCE: | |
526 | ||
527 | # Read all saved command lines and dependencies for the $(targets) we | |
528 | # may be building above, using $(if_changed{,_dep}). As an | |
529 | # optimization, we don't need to read them if the target does not | |
530 | # exist, we will rebuild anyway in that case. | |
531 | ||
392885ee | 532 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 533 | |
392885ee | 534 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 535 | |
8a78756e | 536 | # Create directories for object files if they do not exist |
cc8a51ca | 537 | obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) |
392885ee MY |
538 | # If targets exist, their directories apparently exist. Skip mkdir. |
539 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
540 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 541 | ifneq ($(obj-dirs),) |
8a78756e MY |
542 | $(shell mkdir -p $(obj-dirs)) |
543 | endif | |
544 | ||
4f193362 | 545 | .PHONY: $(PHONY) |