Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | # ========================================================================== |
3 | # Building | |
4 | # ========================================================================== | |
5 | ||
b1992c37 | 6 | src := $(if $(VPATH),$(VPATH)/)$(obj) |
1da177e4 | 7 | |
cc306abd MY |
8 | PHONY := $(obj)/ |
9 | $(obj)/: | |
1da177e4 | 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 := | |
2f7ab126 | 29 | rustflags-y := |
f77bf014 SR |
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 | |
3204a7fb | 39 | include $(srctree)/scripts/Kbuild.include |
57fd251c | 40 | include $(srctree)/scripts/Makefile.compiler |
a2430b25 | 41 | include $(kbuild-file) |
3204a7fb | 42 | include $(srctree)/scripts/Makefile.lib |
1da177e4 | 43 | |
85569d19 MY |
44 | # Do not include hostprogs rules unless needed. |
45 | # $(sort ...) is used here to remove duplicated words and excessive spaces. | |
46 | hostprogs := $(sort $(hostprogs)) | |
42640b13 | 47 | ifneq ($(hostprogs),) |
3204a7fb | 48 | include $(srctree)/scripts/Makefile.host |
1da177e4 LT |
49 | endif |
50 | ||
7f3a59db | 51 | # Do not include userprogs rules unless needed. |
85569d19 | 52 | # $(sort ...) is used here to remove duplicated words and excessive spaces. |
7f3a59db MY |
53 | userprogs := $(sort $(userprogs)) |
54 | ifneq ($(userprogs),) | |
3204a7fb | 55 | include $(srctree)/scripts/Makefile.userprogs |
7f3a59db MY |
56 | endif |
57 | ||
1da177e4 LT |
58 | ifndef obj |
59 | $(warning kbuild: Makefile.build is included improperly) | |
60 | endif | |
61 | ||
394053f4 | 62 | ifeq ($(need-modorder),) |
c07d8d47 MY |
63 | ifneq ($(obj-m),) |
64 | $(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.) | |
65 | $(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.) | |
66 | endif | |
67 | endif | |
68 | ||
1da177e4 LT |
69 | # =========================================================================== |
70 | ||
454753d9 | 71 | # subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...) |
aaa385ba | 72 | subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y))) |
b2c88554 | 73 | subdir-modorder := $(sort $(filter %/modules.order, $(obj-m))) |
24507871 | 74 | subdir-dtbslist := $(sort $(filter %/dtbs-list, $(dtb-y))) |
6ba3bcb0 | 75 | |
f3908ab3 MY |
76 | targets-for-builtin := $(extra-y) |
77 | ||
a4954fd7 | 78 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
f3908ab3 | 79 | targets-for-builtin += $(obj)/lib.a |
1da177e4 LT |
80 | endif |
81 | ||
56d58936 | 82 | ifdef need-builtin |
f3908ab3 | 83 | targets-for-builtin += $(obj)/built-in.a |
1da177e4 LT |
84 | endif |
85 | ||
5e9e95cc | 86 | targets-for-modules := $(foreach x, o mod, \ |
9413e764 | 87 | $(patsubst %.o, %.$x, $(filter %.o, $(obj-m)))) |
f3908ab3 | 88 | |
b480fec9 | 89 | ifdef need-modorder |
f3908ab3 | 90 | targets-for-modules += $(obj)/modules.order |
1d8001ef | 91 | endif |
551559e1 | 92 | |
f3908ab3 | 93 | targets += $(targets-for-builtin) $(targets-for-modules) |
9f69a496 | 94 | |
1da177e4 | 95 | # Linus' kernel sanity checking tool |
7d0ea252 MY |
96 | ifeq ($(KBUILD_CHECKSRC),1) |
97 | quiet_cmd_checksrc = CHECK $< | |
e5d28910 | 98 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
7d0ea252 MY |
99 | else ifeq ($(KBUILD_CHECKSRC),2) |
100 | quiet_cmd_force_checksrc = CHECK $< | |
e5d28910 | 101 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
1da177e4 LT |
102 | endif |
103 | ||
e27128db | 104 | ifneq ($(KBUILD_EXTRA_WARN),) |
dd203fef JB |
105 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $(KDOCFLAGS) \ |
106 | $(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) \ | |
107 | $< | |
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 | |
9a0ebe50 | 116 | $(obj)/%.s: $(obj)/%.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 | |
9a0ebe50 | 122 | $(obj)/%.i: $(obj)/%.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 | |
9a0ebe50 | 136 | $(obj)/%.symtypes : $(obj)/%.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) $@ | |
c67a85be | 142 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $< |
433db3e2 | 143 | |
9a0ebe50 | 144 | $(obj)/%.ll: $(obj)/%.c FORCE |
433db3e2 VT |
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 | 166 | # o compile a <file>.o from <file>.c |
ddb5cdba | 167 | # o if <file>.o doesn't contain a __export_symbol_*, i.e. does |
ee3e46b7 | 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 = \ |
ddb5cdba | 175 | if $(NM) $@ 2>/dev/null | grep -q ' __export_symbol_'; 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 | |
9c2d1328 | 217 | is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(target-stem).o)$(OBJECT_FILES_NON_STANDARD)n),$(is-kernel-object)) |
918a6b7f | 218 | |
d98dba88 | 219 | $(obj)/%.o: private objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y)) |
b9ab5ebb | 220 | |
598afa05 MY |
221 | ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),) |
222 | cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi))) | |
223 | endif | |
224 | ||
1da177e4 | 225 | define rule_cc_o_c |
3a2429e1 | 226 | $(call cmd_and_fixdep,cc_o_c) |
0c33f125 | 227 | $(call cmd,checksrc) |
3a2429e1 | 228 | $(call cmd,checkdoc) |
ef62588c | 229 | $(call cmd,gen_objtooldep) |
8017ce50 | 230 | $(call cmd,gen_symversions_c) |
3a2429e1 | 231 | $(call cmd,record_mcount) |
598afa05 | 232 | $(call cmd,warn_shared_object) |
1da177e4 LT |
233 | endef |
234 | ||
b9ab5ebb | 235 | define rule_as_o_S |
3a2429e1 | 236 | $(call cmd_and_fixdep,as_o_S) |
ef62588c | 237 | $(call cmd,gen_objtooldep) |
7cfa2fcb | 238 | $(call cmd,gen_symversions_S) |
598afa05 | 239 | $(call cmd,warn_shared_object) |
b9ab5ebb JP |
240 | endef |
241 | ||
1da177e4 | 242 | # Built-in and composite module parts |
9a0ebe50 | 243 | $(obj)/%.o: $(obj)/%.c $(recordmcount_source) FORCE |
1da177e4 | 244 | $(call if_changed_rule,cc_o_c) |
0c33f125 | 245 | $(call cmd,force_checksrc) |
1da177e4 | 246 | |
c6031b1d MY |
247 | # To make this rule robust against "Argument list too long" error, |
248 | # ensure to add $(obj)/ prefix by a shell command. | |
7bf179de KL |
249 | cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \ |
250 | $(AWK) '!x[$$0]++ { print("$(obj)/"$$0) }' > $@ | |
9f69a496 | 251 | |
fc93a4cd | 252 | $(obj)/%.mod: FORCE |
9f69a496 MY |
253 | $(call if_changed,mod) |
254 | ||
1da177e4 LT |
255 | quiet_cmd_cc_lst_c = MKLST $@ |
256 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
257 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
258 | System.map $(OBJDUMP) > $@ | |
259 | ||
9a0ebe50 | 260 | $(obj)/%.lst: $(obj)/%.c FORCE |
1da177e4 LT |
261 | $(call if_changed_dep,cc_lst_c) |
262 | ||
2f7ab126 MO |
263 | # Compile Rust sources (.rs) |
264 | # --------------------------------------------------------------------------- | |
265 | ||
7324b889 | 266 | rust_allowed_features := new_uninit,offset_of |
2f7ab126 | 267 | |
df01b7cf MO |
268 | # `--out-dir` is required to avoid temporaries being created by `rustc` in the |
269 | # current working directory, which may be not accessible in the out-of-tree | |
270 | # modules case. | |
2f7ab126 MO |
271 | rust_common_cmd = \ |
272 | RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \ | |
273 | -Zallow-features=$(rust_allowed_features) \ | |
274 | -Zcrate-attr=no_std \ | |
275 | -Zcrate-attr='feature($(rust_allowed_features))' \ | |
276 | --extern alloc --extern kernel \ | |
295d8398 MY |
277 | --crate-type rlib -L $(objtree)/rust/ \ |
278 | --crate-name $(basename $(notdir $@)) \ | |
71479eee | 279 | --sysroot=/dev/null \ |
df01b7cf | 280 | --out-dir $(dir $@) --emit=dep-info=$(depfile) |
2f7ab126 | 281 | |
2f7ab126 MO |
282 | # `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit |
283 | # will be used. We explicitly request `-Ccodegen-units=1` in any case, and | |
284 | # the compiler shows a warning if it is not 1. However, if we ever stop | |
285 | # requesting it explicitly and we start using some other `--emit` that does not | |
286 | # imply it (and for which codegen is performed), then we would be out of sync, | |
287 | # i.e. the outputs we would get for the different single targets (e.g. `.ll`) | |
288 | # would not match each other. | |
289 | ||
290 | quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ | |
2185242f | 291 | cmd_rustc_o_rs = $(rust_common_cmd) --emit=obj=$@ $< |
2f7ab126 | 292 | |
9a0ebe50 | 293 | $(obj)/%.o: $(obj)/%.rs FORCE |
ecab4115 | 294 | +$(call if_changed_dep,rustc_o_rs) |
2f7ab126 MO |
295 | |
296 | quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ | |
297 | cmd_rustc_rsi_rs = \ | |
295d8398 | 298 | $(rust_common_cmd) -Zunpretty=expanded $< >$@; \ |
2185242f | 299 | command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@ |
2f7ab126 | 300 | |
9a0ebe50 | 301 | $(obj)/%.rsi: $(obj)/%.rs FORCE |
ecab4115 | 302 | +$(call if_changed_dep,rustc_rsi_rs) |
2f7ab126 MO |
303 | |
304 | quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ | |
2185242f | 305 | cmd_rustc_s_rs = $(rust_common_cmd) --emit=asm=$@ $< |
2f7ab126 | 306 | |
9a0ebe50 | 307 | $(obj)/%.s: $(obj)/%.rs FORCE |
ecab4115 | 308 | +$(call if_changed_dep,rustc_s_rs) |
2f7ab126 MO |
309 | |
310 | quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ | |
2185242f | 311 | cmd_rustc_ll_rs = $(rust_common_cmd) --emit=llvm-ir=$@ $< |
2f7ab126 | 312 | |
9a0ebe50 | 313 | $(obj)/%.ll: $(obj)/%.rs FORCE |
ecab4115 | 314 | +$(call if_changed_dep,rustc_ll_rs) |
2f7ab126 | 315 | |
1da177e4 LT |
316 | # Compile assembler sources (.S) |
317 | # --------------------------------------------------------------------------- | |
318 | ||
4efca4ed NP |
319 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
320 | # or a file that it includes, in order to get versioned symbols. We build a | |
321 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
322 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
323 | # | |
324 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
325 | # expand names, then the resulting exports must be constructed into plain | |
326 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
327 | # to make the genksyms input. | |
328 | # | |
329 | # These mirror gensymtypes_c and co above, keep them in synch. | |
330 | cmd_gensymtypes_S = \ | |
b79c6aa6 | 331 | { echo "\#include <linux/kernel.h>" ; \ |
4efca4ed | 332 | echo "\#include <asm/asm-prototypes.h>" ; \ |
ddb5cdba | 333 | $(NM) $@ | sed -n 's/.* __export_symbol_\(.*\)/EXPORT_SYMBOL(\1);/p' ; } | \ |
f43e31d5 | 334 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms) |
4efca4ed NP |
335 | |
336 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
dc6dc3e7 | 337 | cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null |
4efca4ed | 338 | |
9a0ebe50 | 339 | $(obj)/%.symtypes : $(obj)/%.S FORCE |
4efca4ed NP |
340 | $(call cmd,cc_symtypes_S) |
341 | ||
342 | ||
e0f41e52 MY |
343 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
344 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 345 | |
9a0ebe50 | 346 | $(obj)/%.s: $(obj)/%.S FORCE |
e0f41e52 | 347 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
348 | |
349 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
92594d56 | 350 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool) |
4efca4ed | 351 | |
2ff2b7ec | 352 | ifdef CONFIG_ASM_MODVERSIONS |
4efca4ed NP |
353 | |
354 | # versioning matches the C process described above, with difference that | |
355 | # we parse asm-prototypes.h C header to get function definitions. | |
356 | ||
7cfa2fcb MY |
357 | cmd_gen_symversions_S = $(call gen_symversions,S) |
358 | ||
4efca4ed | 359 | endif |
1da177e4 | 360 | |
9a0ebe50 | 361 | $(obj)/%.o: $(obj)/%.S FORCE |
b9ab5ebb | 362 | $(call if_changed_rule,as_o_S) |
1da177e4 | 363 | |
b2c88554 MY |
364 | targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |
365 | targets += $(filter-out $(subdir-modorder), $(real-obj-m)) | |
cc306abd | 366 | targets += $(real-dtb-y) $(lib-y) $(always-y) |
1da177e4 LT |
367 | |
368 | # Linker scripts preprocessor (.lds.S -> .lds) | |
369 | # --------------------------------------------------------------------------- | |
370 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 371 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 372 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 373 | |
767e581d | 374 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
375 | $(call if_changed_dep,cpp_lds_S) |
376 | ||
4520c6a4 DH |
377 | # ASN.1 grammar |
378 | # --------------------------------------------------------------------------- | |
49d5089d | 379 | quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch] |
4520c6a4 | 380 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
49d5089d | 381 | $(basename $@).c $(basename $@).h |
4520c6a4 | 382 | |
4fa8bc94 | 383 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
384 | $(call cmd,asn1_compiler) |
385 | ||
1da177e4 LT |
386 | # Build the compiled-in targets |
387 | # --------------------------------------------------------------------------- | |
388 | ||
389 | # To build objects in subdirs, we need to descend into the directories | |
aaa385ba | 390 | $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ; |
454753d9 | 391 | $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; |
24507871 | 392 | $(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ; |
1da177e4 LT |
393 | |
394 | # | |
dee94953 | 395 | # Rule to compile a set of .o files into one .a file (without symbol table) |
1da177e4 | 396 | # |
cd968b97 MY |
397 | # To make this rule robust against "Argument list too long" error, |
398 | # remove $(obj)/ prefix, and restore it by a shell command. | |
a5967db9 | 399 | |
5e18f029 | 400 | quiet_cmd_ar_builtin = AR $@ |
cd968b97 | 401 | cmd_ar_builtin = rm -f $@; \ |
5439d4d4 MY |
402 | $(if $(real-prereqs), printf "$(obj)/%s " $(patsubst $(obj)/%,%,$(real-prereqs)) | xargs) \ |
403 | $(AR) cDPrST $@ | |
1da177e4 | 404 | |
e578edc7 | 405 | $(obj)/built-in.a: $(real-obj-y) FORCE |
7375cbcf | 406 | $(call if_changed,ar_builtin) |
1da177e4 | 407 | |
551559e1 | 408 | # |
24507871 | 409 | # Rule to create modules.order and dtbs-list |
551559e1 | 410 | # |
24507871 MY |
411 | # This is a list of build artifacts (module or dtb) from the current Makefile |
412 | # and its sub-directories. The timestamp should be updated when any of the | |
413 | # member files. | |
b2c88554 | 414 | |
24507871 MY |
415 | cmd_gen_order = { $(foreach m, $(real-prereqs), \ |
416 | $(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \ | |
d724b578 | 417 | > $@ |
551559e1 | 418 | |
b2c88554 | 419 | $(obj)/modules.order: $(obj-m) FORCE |
24507871 MY |
420 | $(call if_changed,gen_order) |
421 | ||
422 | $(obj)/dtbs-list: $(dtb-y) FORCE | |
423 | $(call if_changed,gen_order) | |
b2c88554 | 424 | |
1da177e4 | 425 | # |
dee94953 | 426 | # Rule to compile a set of .o files into one .a file (with symbol table) |
1da177e4 | 427 | # |
38e89184 | 428 | |
e578edc7 | 429 | $(obj)/lib.a: $(lib-y) FORCE |
7375cbcf | 430 | $(call if_changed,ar) |
1da177e4 | 431 | |
f6b66ca4 | 432 | quiet_cmd_ld_multi_m = LD [M] $@ |
1b1595cd | 433 | cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool) |
f6b66ca4 MY |
434 | |
435 | define rule_ld_multi_m | |
436 | $(call cmd_and_savecmd,ld_multi_m) | |
437 | $(call cmd,gen_objtooldep) | |
438 | endef | |
1da177e4 | 439 | |
d98dba88 MY |
440 | $(multi-obj-m): private objtool-enabled := $(delay-objtool) |
441 | $(multi-obj-m): private part-of-module := y | |
feb7d79f | 442 | $(multi-obj-m): %.o: %.mod FORCE |
f6b66ca4 | 443 | $(call if_changed_rule,ld_multi_m) |
a6601e01 | 444 | $(call multi_depend, $(multi-obj-m), .o, -objs -y -m) |
1da177e4 | 445 | |
b23d1a24 MY |
446 | # Add intermediate targets: |
447 | # When building objects with specific suffix patterns, add intermediate | |
448 | # targets that the final targets are derived from. | |
449 | intermediate_targets = $(foreach sfx, $(2), \ | |
450 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
451 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 452 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 453 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
dcad240c | 454 | # %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso |
b23d1a24 MY |
455 | # %.lex.o <- %.lex.c <- %.l |
456 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
457 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
458 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
dcad240c | 459 | $(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo) \ |
a7f92419 | 460 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
461 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
462 | ||
394053f4 MY |
463 | # Build |
464 | # --------------------------------------------------------------------------- | |
465 | ||
cc306abd MY |
466 | $(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ |
467 | $(if $(KBUILD_MODULES), $(targets-for-modules)) \ | |
468 | $(subdir-ym) $(always-y) | |
394053f4 MY |
469 | @: |
470 | ||
cc306abd MY |
471 | # Single targets |
472 | # --------------------------------------------------------------------------- | |
394053f4 | 473 | |
cc306abd MY |
474 | single-subdirs := $(foreach d, $(subdir-ym), $(if $(filter $d/%, $(MAKECMDGOALS)), $d)) |
475 | single-subdir-goals := $(filter $(addsuffix /%, $(single-subdirs)), $(MAKECMDGOALS)) | |
394053f4 | 476 | |
cc306abd | 477 | $(single-subdir-goals): $(single-subdirs) |
394053f4 MY |
478 | @: |
479 | ||
1da177e4 LT |
480 | # Descending |
481 | # --------------------------------------------------------------------------- | |
482 | ||
4f193362 | 483 | PHONY += $(subdir-ym) |
1da177e4 | 484 | $(subdir-ym): |
d9f78edf | 485 | $(Q)$(MAKE) $(build)=$@ \ |
aaa385ba | 486 | need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ |
cc306abd MY |
487 | need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \ |
488 | $(filter $@/%, $(single-subdir-goals)) | |
1da177e4 LT |
489 | |
490 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
491 | # --------------------------------------------------------------------------- | |
492 | ||
4f193362 | 493 | PHONY += FORCE |
1da177e4 LT |
494 | |
495 | FORCE: | |
496 | ||
cc306abd MY |
497 | targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS)) |
498 | targets := $(filter-out $(PHONY), $(targets)) | |
499 | ||
1da177e4 LT |
500 | # Read all saved command lines and dependencies for the $(targets) we |
501 | # may be building above, using $(if_changed{,_dep}). As an | |
502 | # optimization, we don't need to read them if the target does not | |
503 | # exist, we will rebuild anyway in that case. | |
504 | ||
392885ee | 505 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 506 | |
392885ee | 507 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 508 | |
8a78756e | 509 | # Create directories for object files if they do not exist |
cc8a51ca | 510 | obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) |
392885ee MY |
511 | # If targets exist, their directories apparently exist. Skip mkdir. |
512 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
513 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 514 | ifneq ($(obj-dirs),) |
8a78756e MY |
515 | $(shell mkdir -p $(obj-dirs)) |
516 | endif | |
517 | ||
4f193362 | 518 | .PHONY: $(PHONY) |