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Commit | Line | Data |
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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 := | |
5f2fb52f MY |
18 | always-y := |
19 | always-m := | |
d72e5edb SR |
20 | targets := |
21 | subdir-y := | |
22 | subdir-m := | |
23 | EXTRA_AFLAGS := | |
24 | EXTRA_CFLAGS := | |
25 | EXTRA_CPPFLAGS := | |
26 | EXTRA_LDFLAGS := | |
f77bf014 SR |
27 | asflags-y := |
28 | ccflags-y := | |
29 | cppflags-y := | |
30 | ldflags-y := | |
d72e5edb | 31 | |
720097d8 SR |
32 | subdir-asflags-y := |
33 | subdir-ccflags-y := | |
34 | ||
3156fd05 | 35 | # Read auto.conf if it exists, otherwise ignore |
c955ccaf | 36 | -include include/config/auto.conf |
1da177e4 | 37 | |
3204a7fb | 38 | include $(srctree)/scripts/Kbuild.include |
57fd251c | 39 | include $(srctree)/scripts/Makefile.compiler |
20a468b5 | 40 | |
2a691470 | 41 | # The filename Kbuild has precedence over Makefile |
db8c1a7b | 42 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
5c816641 | 43 | include $(or $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Makefile) |
0c53c8e6 | 44 | |
3204a7fb | 45 | include $(srctree)/scripts/Makefile.lib |
1da177e4 | 46 | |
85569d19 MY |
47 | # Do not include hostprogs rules unless needed. |
48 | # $(sort ...) is used here to remove duplicated words and excessive spaces. | |
49 | hostprogs := $(sort $(hostprogs)) | |
42640b13 | 50 | ifneq ($(hostprogs),) |
3204a7fb | 51 | include $(srctree)/scripts/Makefile.host |
1da177e4 LT |
52 | endif |
53 | ||
7f3a59db | 54 | # Do not include userprogs rules unless needed. |
85569d19 | 55 | # $(sort ...) is used here to remove duplicated words and excessive spaces. |
7f3a59db MY |
56 | userprogs := $(sort $(userprogs)) |
57 | ifneq ($(userprogs),) | |
3204a7fb | 58 | include $(srctree)/scripts/Makefile.userprogs |
7f3a59db MY |
59 | endif |
60 | ||
1da177e4 LT |
61 | ifndef obj |
62 | $(warning kbuild: Makefile.build is included improperly) | |
63 | endif | |
64 | ||
394053f4 | 65 | ifeq ($(need-modorder),) |
c07d8d47 MY |
66 | ifneq ($(obj-m),) |
67 | $(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.) | |
68 | $(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.) | |
69 | endif | |
70 | endif | |
71 | ||
1da177e4 LT |
72 | # =========================================================================== |
73 | ||
454753d9 | 74 | # subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...) |
aaa385ba | 75 | subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y))) |
b2c88554 | 76 | subdir-modorder := $(sort $(filter %/modules.order, $(obj-m))) |
6ba3bcb0 | 77 | |
f3908ab3 MY |
78 | targets-for-builtin := $(extra-y) |
79 | ||
a4954fd7 | 80 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
f3908ab3 | 81 | targets-for-builtin += $(obj)/lib.a |
1da177e4 LT |
82 | endif |
83 | ||
56d58936 | 84 | ifdef need-builtin |
f3908ab3 | 85 | targets-for-builtin += $(obj)/built-in.a |
1da177e4 LT |
86 | endif |
87 | ||
fc93a4cd | 88 | targets-for-modules := $(foreach x, o mod $(if $(CONFIG_TRIM_UNUSED_KSYMS), usyms), \ |
9413e764 | 89 | $(patsubst %.o, %.$x, $(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 | |
f43e31d5 MY |
125 | genksyms = scripts/genksyms/genksyms \ |
126 | $(if $(1), -T $(2)) \ | |
f43e31d5 MY |
127 | $(if $(KBUILD_PRESERVE), -p) \ |
128 | -r $(or $(wildcard $(2:.symtypes=.symref)), /dev/null) | |
129 | ||
4efca4ed | 130 | # These mirror gensymtypes_S and co below, keep them in synch. |
f43e31d5 | 131 | cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms) |
37a8d9f6 | 132 | |
15fde675 | 133 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
dc6dc3e7 | 134 | cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null |
15fde675 | 135 | |
767e581d | 136 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 137 | $(call cmd,cc_symtypes_c) |
15fde675 | 138 | |
433db3e2 VT |
139 | # LLVM assembly |
140 | # Generate .ll files from .c | |
141 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ | |
142 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< | |
143 | ||
144 | $(obj)/%.ll: $(src)/%.c FORCE | |
145 | $(call if_changed_dep,cc_ll_c) | |
146 | ||
1da177e4 LT |
147 | # C (.c) files |
148 | # The C file is compiled and updated dependency information is generated. | |
149 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
150 | ||
c25e1c55 MY |
151 | is-single-obj-m = $(and $(part-of-module),$(filter $@, $(obj-m)),y) |
152 | ||
153 | # When a module consists of a single object, there is no reason to keep LLVM IR. | |
154 | # Make $(LD) covert LLVM IR to ELF here. | |
155 | ifdef CONFIG_LTO_CLANG | |
156 | cmd_ld_single_m = $(if $(is-single-obj-m), ; $(LD) $(ld_flags) -r -o $(tmp-target) $@; mv $(tmp-target) $@) | |
157 | endif | |
158 | ||
1da177e4 | 159 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
c25e1c55 MY |
160 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< \ |
161 | $(cmd_ld_single_m) \ | |
162 | $(cmd_objtool) | |
1da177e4 | 163 | |
ee3e46b7 | 164 | ifdef CONFIG_MODVERSIONS |
1da177e4 | 165 | # When module versioning is enabled the following steps are executed: |
ee3e46b7 MY |
166 | # o compile a <file>.o from <file>.c |
167 | # o if <file>.o doesn't contain a __ksymtab version, i.e. does | |
168 | # not export symbols, it's done. | |
1da177e4 | 169 | # o otherwise, we calculate symbol versions using the good old |
7b453719 MY |
170 | # genksyms on the preprocessed source and dump them into the .cmd file. |
171 | # o modpost will extract versions from that file and create *.c files that will | |
172 | # be compiled and linked to the kernel and/or modules. | |
4efca4ed | 173 | |
8017ce50 | 174 | gen_symversions = \ |
38e89184 | 175 | if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \ |
8017ce50 | 176 | $(call cmd_gensymtypes_$(1),$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
78e9e56a | 177 | >> $(dot-target).cmd; \ |
e5d28910 | 178 | fi |
8017ce50 MY |
179 | |
180 | cmd_gen_symversions_c = $(call gen_symversions,c) | |
181 | ||
38e89184 | 182 | endif |
1da177e4 | 183 | |
3b15cdc1 | 184 | ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
07d04081 | 185 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl |
72441cb1 | 186 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
187 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
188 | RECORDMCOUNT_FLAGS = -w | |
189 | endif | |
d7b4d6de SR |
190 | # Due to recursion, we must skip empty.o. |
191 | # The empty.o file is created in the make process in order to determine | |
312a3d09 C |
192 | # the target endianness and word size. It is made before all other C |
193 | # files, including recordmcount. | |
45677454 WZ |
194 | sub_cmd_record_mcount = \ |
195 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 196 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 197 | fi; |
d6971822 MM |
198 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
199 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 200 | else |
4317ee3b | 201 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 202 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 203 | "$(if $(CONFIG_64BIT),64,32)" \ |
5a4630aa | 204 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
d503ac53 | 205 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
18c167fd | 206 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 207 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
312a3d09 | 208 | endif # BUILD_C_RECORDMCOUNT |
1a49b2fd JL |
209 | cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ |
210 | $(sub_cmd_record_mcount)) | |
3b15cdc1 | 211 | endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
8da3821b | 212 | |
b9ab5ebb JP |
213 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
214 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
215 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
918a6b7f | 216 | |
c25e1c55 | 217 | is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n),y) |
918a6b7f | 218 | |
c25e1c55 | 219 | $(obj)/%.o: objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y)) |
b9ab5ebb | 220 | |
bbda5ec6 MY |
221 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
222 | cmd_gen_ksymdeps = \ | |
e5d28910 | 223 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
bbda5ec6 MY |
224 | endif |
225 | ||
31cb50b5 MY |
226 | cmd_check_local_export = $(srctree)/scripts/check-local-export $@ |
227 | ||
1da177e4 | 228 | define rule_cc_o_c |
3a2429e1 MY |
229 | $(call cmd_and_fixdep,cc_o_c) |
230 | $(call cmd,gen_ksymdeps) | |
31cb50b5 | 231 | $(call cmd,check_local_export) |
0c33f125 | 232 | $(call cmd,checksrc) |
3a2429e1 | 233 | $(call cmd,checkdoc) |
ef62588c | 234 | $(call cmd,gen_objtooldep) |
8017ce50 | 235 | $(call cmd,gen_symversions_c) |
3a2429e1 | 236 | $(call cmd,record_mcount) |
1da177e4 LT |
237 | endef |
238 | ||
b9ab5ebb | 239 | define rule_as_o_S |
3a2429e1 MY |
240 | $(call cmd_and_fixdep,as_o_S) |
241 | $(call cmd,gen_ksymdeps) | |
31cb50b5 | 242 | $(call cmd,check_local_export) |
ef62588c | 243 | $(call cmd,gen_objtooldep) |
7cfa2fcb | 244 | $(call cmd,gen_symversions_S) |
b9ab5ebb JP |
245 | endef |
246 | ||
1da177e4 | 247 | # Built-in and composite module parts |
ef62588c | 248 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE |
1da177e4 | 249 | $(call if_changed_rule,cc_o_c) |
0c33f125 | 250 | $(call cmd,force_checksrc) |
1da177e4 | 251 | |
c6031b1d MY |
252 | # To make this rule robust against "Argument list too long" error, |
253 | # ensure to add $(obj)/ prefix by a shell command. | |
7bf179de KL |
254 | cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \ |
255 | $(AWK) '!x[$$0]++ { print("$(obj)/"$$0) }' > $@ | |
9f69a496 | 256 | |
fc93a4cd | 257 | $(obj)/%.mod: FORCE |
9f69a496 MY |
258 | $(call if_changed,mod) |
259 | ||
9413e764 MY |
260 | # List module undefined symbols |
261 | cmd_undefined_syms = $(NM) $< | sed -n 's/^ *U //p' > $@ | |
262 | ||
c25e1c55 | 263 | $(obj)/%.usyms: $(obj)/%.o FORCE |
9413e764 MY |
264 | $(call if_changed,undefined_syms) |
265 | ||
1da177e4 LT |
266 | quiet_cmd_cc_lst_c = MKLST $@ |
267 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
268 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
269 | System.map $(OBJDUMP) > $@ | |
270 | ||
767e581d | 271 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
272 | $(call if_changed_dep,cc_lst_c) |
273 | ||
274 | # Compile assembler sources (.S) | |
275 | # --------------------------------------------------------------------------- | |
276 | ||
4efca4ed NP |
277 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
278 | # or a file that it includes, in order to get versioned symbols. We build a | |
279 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
280 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
281 | # | |
282 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
283 | # expand names, then the resulting exports must be constructed into plain | |
284 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
285 | # to make the genksyms input. | |
286 | # | |
287 | # These mirror gensymtypes_c and co above, keep them in synch. | |
288 | cmd_gensymtypes_S = \ | |
b79c6aa6 | 289 | { echo "\#include <linux/kernel.h>" ; \ |
4efca4ed NP |
290 | echo "\#include <asm/asm-prototypes.h>" ; \ |
291 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 | 292 | grep "\<___EXPORT_SYMBOL\>" | \ |
b79c6aa6 | 293 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ |
f43e31d5 | 294 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms) |
4efca4ed NP |
295 | |
296 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
dc6dc3e7 | 297 | cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null |
4efca4ed NP |
298 | |
299 | $(obj)/%.symtypes : $(src)/%.S FORCE | |
300 | $(call cmd,cc_symtypes_S) | |
301 | ||
302 | ||
e0f41e52 MY |
303 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
304 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 305 | |
767e581d | 306 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 307 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
308 | |
309 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
92594d56 | 310 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool) |
4efca4ed | 311 | |
2ff2b7ec | 312 | ifdef CONFIG_ASM_MODVERSIONS |
4efca4ed NP |
313 | |
314 | # versioning matches the C process described above, with difference that | |
315 | # we parse asm-prototypes.h C header to get function definitions. | |
316 | ||
7cfa2fcb MY |
317 | cmd_gen_symversions_S = $(call gen_symversions,S) |
318 | ||
4efca4ed | 319 | endif |
1da177e4 | 320 | |
ef62588c | 321 | $(obj)/%.o: $(src)/%.S FORCE |
b9ab5ebb | 322 | $(call if_changed_rule,as_o_S) |
1da177e4 | 323 | |
b2c88554 MY |
324 | targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |
325 | targets += $(filter-out $(subdir-modorder), $(real-obj-m)) | |
bcf0c664 | 326 | targets += $(real-dtb-y) $(lib-y) $(always-y) $(MAKECMDGOALS) |
1da177e4 LT |
327 | |
328 | # Linker scripts preprocessor (.lds.S -> .lds) | |
329 | # --------------------------------------------------------------------------- | |
330 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 331 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 332 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 333 | |
767e581d | 334 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
335 | $(call if_changed_dep,cpp_lds_S) |
336 | ||
4520c6a4 DH |
337 | # ASN.1 grammar |
338 | # --------------------------------------------------------------------------- | |
49d5089d | 339 | quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch] |
4520c6a4 | 340 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
49d5089d | 341 | $(basename $@).c $(basename $@).h |
4520c6a4 | 342 | |
4fa8bc94 | 343 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
344 | $(call cmd,asn1_compiler) |
345 | ||
1da177e4 LT |
346 | # Build the compiled-in targets |
347 | # --------------------------------------------------------------------------- | |
348 | ||
349 | # To build objects in subdirs, we need to descend into the directories | |
aaa385ba | 350 | $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ; |
454753d9 | 351 | $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; |
1da177e4 LT |
352 | |
353 | # | |
dee94953 | 354 | # Rule to compile a set of .o files into one .a file (without symbol table) |
1da177e4 | 355 | # |
cd968b97 MY |
356 | # To make this rule robust against "Argument list too long" error, |
357 | # remove $(obj)/ prefix, and restore it by a shell command. | |
a5967db9 | 358 | |
5e18f029 | 359 | quiet_cmd_ar_builtin = AR $@ |
cd968b97 | 360 | cmd_ar_builtin = rm -f $@; \ |
5439d4d4 MY |
361 | $(if $(real-prereqs), printf "$(obj)/%s " $(patsubst $(obj)/%,%,$(real-prereqs)) | xargs) \ |
362 | $(AR) cDPrST $@ | |
1da177e4 | 363 | |
e578edc7 | 364 | $(obj)/built-in.a: $(real-obj-y) FORCE |
7375cbcf | 365 | $(call if_changed,ar_builtin) |
1da177e4 | 366 | |
551559e1 TH |
367 | # |
368 | # Rule to create modules.order file | |
369 | # | |
370 | # Create commands to either record .ko file or cat modules.order from | |
371 | # a subdirectory | |
b2c88554 MY |
372 | # Add $(obj-m) as the prerequisite to avoid updating the timestamp of |
373 | # modules.order unless contained modules are updated. | |
374 | ||
375 | cmd_modules_order = { $(foreach m, $(real-prereqs), \ | |
376 | $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \ | |
e0e1b1ec | 377 | | $(AWK) '!x[$$0]++' - > $@ |
551559e1 | 378 | |
b2c88554 MY |
379 | $(obj)/modules.order: $(obj-m) FORCE |
380 | $(call if_changed,modules_order) | |
381 | ||
1da177e4 | 382 | # |
dee94953 | 383 | # Rule to compile a set of .o files into one .a file (with symbol table) |
1da177e4 | 384 | # |
38e89184 | 385 | |
e578edc7 | 386 | $(obj)/lib.a: $(lib-y) FORCE |
7375cbcf | 387 | $(call if_changed,ar) |
1da177e4 | 388 | |
f6b66ca4 MY |
389 | quiet_cmd_ld_multi_m = LD [M] $@ |
390 | cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) | |
391 | ||
392 | define rule_ld_multi_m | |
393 | $(call cmd_and_savecmd,ld_multi_m) | |
394 | $(call cmd,gen_objtooldep) | |
395 | endef | |
1da177e4 | 396 | |
c25e1c55 MY |
397 | $(multi-obj-m): objtool-enabled := $(delay-objtool) |
398 | $(multi-obj-m): part-of-module := y | |
feb7d79f | 399 | $(multi-obj-m): %.o: %.mod FORCE |
f6b66ca4 | 400 | $(call if_changed_rule,ld_multi_m) |
a6601e01 | 401 | $(call multi_depend, $(multi-obj-m), .o, -objs -y -m) |
1da177e4 | 402 | |
591f6689 | 403 | targets := $(filter-out $(PHONY), $(targets)) |
1da177e4 | 404 | |
b23d1a24 MY |
405 | # Add intermediate targets: |
406 | # When building objects with specific suffix patterns, add intermediate | |
407 | # targets that the final targets are derived from. | |
408 | intermediate_targets = $(foreach sfx, $(2), \ | |
409 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
410 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 411 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 412 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
b23d1a24 MY |
413 | # %.lex.o <- %.lex.c <- %.l |
414 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
415 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
416 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
a7f92419 | 417 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
418 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
419 | ||
394053f4 MY |
420 | # Build |
421 | # --------------------------------------------------------------------------- | |
422 | ||
423 | ifdef single-build | |
424 | ||
20312629 MY |
425 | KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS)) |
426 | ||
394053f4 MY |
427 | curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ |
428 | $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x)))) | |
429 | ||
430 | # Handle single targets without any rule: show "Nothing to be done for ..." or | |
431 | # "No rule to make target ..." depending on whether the target exists. | |
432 | unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ | |
20312629 | 433 | $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) |
394053f4 | 434 | |
2dffd23f MY |
435 | single-subdirs := $(foreach d, $(subdir-ym), \ |
436 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
437 | ||
438 | __build: $(curdir-single) $(single-subdirs) | |
394053f4 MY |
439 | ifneq ($(unknown-single),) |
440 | $(Q)$(MAKE) -f /dev/null $(unknown-single) | |
441 | endif | |
442 | @: | |
443 | ||
444 | ifeq ($(curdir-single),) | |
445 | # Nothing to do in this directory. Do not include any .*.cmd file for speed-up | |
446 | targets := | |
447 | else | |
448 | targets += $(curdir-single) | |
449 | endif | |
450 | ||
451 | else | |
452 | ||
f3908ab3 MY |
453 | __build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ |
454 | $(if $(KBUILD_MODULES), $(targets-for-modules)) \ | |
5f2fb52f | 455 | $(subdir-ym) $(always-y) |
394053f4 MY |
456 | @: |
457 | ||
458 | endif | |
459 | ||
1da177e4 LT |
460 | # Descending |
461 | # --------------------------------------------------------------------------- | |
462 | ||
4f193362 | 463 | PHONY += $(subdir-ym) |
1da177e4 | 464 | $(subdir-ym): |
d9f78edf | 465 | $(Q)$(MAKE) $(build)=$@ \ |
394053f4 | 466 | $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \ |
aaa385ba | 467 | need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ |
454753d9 | 468 | need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) |
1da177e4 LT |
469 | |
470 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
471 | # --------------------------------------------------------------------------- | |
472 | ||
4f193362 | 473 | PHONY += FORCE |
1da177e4 LT |
474 | |
475 | FORCE: | |
476 | ||
477 | # Read all saved command lines and dependencies for the $(targets) we | |
478 | # may be building above, using $(if_changed{,_dep}). As an | |
479 | # optimization, we don't need to read them if the target does not | |
480 | # exist, we will rebuild anyway in that case. | |
481 | ||
392885ee | 482 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 483 | |
392885ee | 484 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 485 | |
8a78756e | 486 | # Create directories for object files if they do not exist |
cc8a51ca | 487 | obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) |
392885ee MY |
488 | # If targets exist, their directories apparently exist. Skip mkdir. |
489 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
490 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 491 | ifneq ($(obj-dirs),) |
8a78756e MY |
492 | $(shell mkdir -p $(obj-dirs)) |
493 | endif | |
494 | ||
4f193362 | 495 | .PHONY: $(PHONY) |