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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 := | |
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) $@ |
1e88e415 | 114 | cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -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 NP |
168 | |
169 | cmd_modversions_c = \ | |
ee3e46b7 | 170 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed | 171 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
e26d6b83 DZ |
172 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
173 | \ | |
ee3e46b7 | 174 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
e26d6b83 | 175 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
e26d6b83 | 176 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 177 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 178 | fi |
1da177e4 LT |
179 | endif |
180 | ||
8da3821b | 181 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
07d04081 VG |
182 | ifndef CC_USING_RECORD_MCOUNT |
183 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl | |
72441cb1 | 184 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
185 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
186 | RECORDMCOUNT_FLAGS = -w | |
187 | endif | |
d7b4d6de SR |
188 | # Due to recursion, we must skip empty.o. |
189 | # The empty.o file is created in the make process in order to determine | |
312a3d09 C |
190 | # the target endianness and word size. It is made before all other C |
191 | # files, including recordmcount. | |
45677454 WZ |
192 | sub_cmd_record_mcount = \ |
193 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 194 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 195 | fi; |
d6971822 MM |
196 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
197 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 198 | else |
4317ee3b | 199 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 200 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 201 | "$(if $(CONFIG_64BIT),64,32)" \ |
5a4630aa | 202 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
d503ac53 | 203 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
18c167fd | 204 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 205 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
312a3d09 | 206 | endif # BUILD_C_RECORDMCOUNT |
1a49b2fd JL |
207 | cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ |
208 | $(sub_cmd_record_mcount)) | |
07d04081 | 209 | endif # CC_USING_RECORD_MCOUNT |
312a3d09 | 210 | endif # CONFIG_FTRACE_MCOUNT_RECORD |
8da3821b | 211 | |
b9ab5ebb | 212 | ifdef CONFIG_STACK_VALIDATION |
3b27a0c8 | 213 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
214 | |
215 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
216 | ||
11af8474 | 217 | objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) |
ee9f8fce | 218 | |
ca41b97e PZ |
219 | objtool_args += $(if $(part-of-module), --module,) |
220 | ||
b9ab5ebb JP |
221 | ifndef CONFIG_FRAME_POINTER |
222 | objtool_args += --no-fp | |
223 | endif | |
867ac9d7 JP |
224 | ifdef CONFIG_GCOV_KERNEL |
225 | objtool_args += --no-unreachable | |
226 | endif | |
b5bc2231 PZ |
227 | ifdef CONFIG_RETPOLINE |
228 | objtool_args += --retpoline | |
229 | endif | |
ea24213d PZ |
230 | ifdef CONFIG_X86_SMAP |
231 | objtool_args += --uaccess | |
232 | endif | |
b5bc2231 | 233 | |
b9ab5ebb JP |
234 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
235 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
236 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
237 | cmd_objtool = $(if $(patsubst y%,, \ | |
238 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
e5d28910 | 239 | $(__objtool_obj) $(objtool_args) $@) |
b9ab5ebb JP |
240 | objtool_obj = $(if $(patsubst y%,, \ |
241 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
242 | $(__objtool_obj)) | |
243 | ||
3b27a0c8 | 244 | endif # SKIP_STACK_VALIDATION |
b9ab5ebb JP |
245 | endif # CONFIG_STACK_VALIDATION |
246 | ||
ee9f8fce JP |
247 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
248 | objtool_dep = $(objtool_obj) \ | |
249 | $(wildcard include/config/orc/unwinder.h \ | |
250 | include/config/stack/validation.h) | |
251 | ||
bbda5ec6 MY |
252 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
253 | cmd_gen_ksymdeps = \ | |
e5d28910 | 254 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
bbda5ec6 MY |
255 | endif |
256 | ||
1da177e4 | 257 | define rule_cc_o_c |
3a2429e1 MY |
258 | $(call cmd_and_fixdep,cc_o_c) |
259 | $(call cmd,gen_ksymdeps) | |
0c33f125 | 260 | $(call cmd,checksrc) |
3a2429e1 MY |
261 | $(call cmd,checkdoc) |
262 | $(call cmd,objtool) | |
263 | $(call cmd,modversions_c) | |
264 | $(call cmd,record_mcount) | |
1da177e4 LT |
265 | endef |
266 | ||
b9ab5ebb | 267 | define rule_as_o_S |
3a2429e1 MY |
268 | $(call cmd_and_fixdep,as_o_S) |
269 | $(call cmd,gen_ksymdeps) | |
270 | $(call cmd,objtool) | |
271 | $(call cmd,modversions_S) | |
b9ab5ebb JP |
272 | endef |
273 | ||
9895c03d NP |
274 | # List module undefined symbols (or empty line if not enabled) |
275 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
9f69a496 | 276 | cmd_undef_syms = $(NM) $< | sed -n 's/^ *U //p' | xargs echo |
9895c03d NP |
277 | else |
278 | cmd_undef_syms = echo | |
279 | endif | |
280 | ||
1da177e4 | 281 | # Built-in and composite module parts |
ee9f8fce | 282 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 | 283 | $(call if_changed_rule,cc_o_c) |
0c33f125 | 284 | $(call cmd,force_checksrc) |
1da177e4 | 285 | |
9f69a496 MY |
286 | cmd_mod = { \ |
287 | echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \ | |
288 | $(cmd_undef_syms); \ | |
289 | } > $@ | |
290 | ||
291 | $(obj)/%.mod: $(obj)/%.o FORCE | |
292 | $(call if_changed,mod) | |
293 | ||
1da177e4 LT |
294 | quiet_cmd_cc_lst_c = MKLST $@ |
295 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
296 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
297 | System.map $(OBJDUMP) > $@ | |
298 | ||
767e581d | 299 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
300 | $(call if_changed_dep,cc_lst_c) |
301 | ||
302 | # Compile assembler sources (.S) | |
303 | # --------------------------------------------------------------------------- | |
304 | ||
4efca4ed NP |
305 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
306 | # or a file that it includes, in order to get versioned symbols. We build a | |
307 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
308 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
309 | # | |
310 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
311 | # expand names, then the resulting exports must be constructed into plain | |
312 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
313 | # to make the genksyms input. | |
314 | # | |
315 | # These mirror gensymtypes_c and co above, keep them in synch. | |
316 | cmd_gensymtypes_S = \ | |
b79c6aa6 | 317 | { echo "\#include <linux/kernel.h>" ; \ |
4efca4ed NP |
318 | echo "\#include <asm/asm-prototypes.h>" ; \ |
319 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 | 320 | grep "\<___EXPORT_SYMBOL\>" | \ |
b79c6aa6 | 321 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ |
4efca4ed | 322 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
88110713 | 323 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
56067812 | 324 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
4efca4ed NP |
325 | $(if $(KBUILD_PRESERVE),-p) \ |
326 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) | |
327 | ||
328 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
329 | cmd_cc_symtypes_S = \ | |
4efca4ed NP |
330 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
331 | test -s $@ || rm -f $@ | |
332 | ||
333 | $(obj)/%.symtypes : $(src)/%.S FORCE | |
334 | $(call cmd,cc_symtypes_S) | |
335 | ||
336 | ||
e0f41e52 MY |
337 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
338 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 339 | |
767e581d | 340 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 341 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
342 | |
343 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
ee3e46b7 | 344 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
4efca4ed | 345 | |
2ff2b7ec | 346 | ifdef CONFIG_ASM_MODVERSIONS |
4efca4ed NP |
347 | |
348 | # versioning matches the C process described above, with difference that | |
349 | # we parse asm-prototypes.h C header to get function definitions. | |
350 | ||
4efca4ed | 351 | cmd_modversions_S = \ |
ee3e46b7 | 352 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed NP |
353 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
354 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
355 | \ | |
ee3e46b7 | 356 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
4efca4ed | 357 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
4efca4ed | 358 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 359 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 360 | fi |
4efca4ed | 361 | endif |
1da177e4 | 362 | |
ee9f8fce | 363 | $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE |
b9ab5ebb | 364 | $(call if_changed_rule,as_o_S) |
1da177e4 | 365 | |
b2c88554 MY |
366 | targets += $(filter-out $(subdir-builtin), $(real-obj-y)) |
367 | targets += $(filter-out $(subdir-modorder), $(real-obj-m)) | |
368 | targets += $(lib-y) $(always-y) $(MAKECMDGOALS) | |
1da177e4 LT |
369 | |
370 | # Linker scripts preprocessor (.lds.S -> .lds) | |
371 | # --------------------------------------------------------------------------- | |
372 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 373 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 374 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 375 | |
767e581d | 376 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
377 | $(call if_changed_dep,cpp_lds_S) |
378 | ||
4520c6a4 DH |
379 | # ASN.1 grammar |
380 | # --------------------------------------------------------------------------- | |
49d5089d | 381 | quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch] |
4520c6a4 | 382 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
49d5089d | 383 | $(basename $@).c $(basename $@).h |
4520c6a4 | 384 | |
4fa8bc94 | 385 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
386 | $(call cmd,asn1_compiler) |
387 | ||
1da177e4 LT |
388 | # Build the compiled-in targets |
389 | # --------------------------------------------------------------------------- | |
390 | ||
391 | # To build objects in subdirs, we need to descend into the directories | |
aaa385ba | 392 | $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ; |
454753d9 | 393 | $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; |
1da177e4 LT |
394 | |
395 | # | |
dee94953 | 396 | # Rule to compile a set of .o files into one .a file (without symbol table) |
1da177e4 | 397 | # |
a5967db9 | 398 | |
5e18f029 | 399 | quiet_cmd_ar_builtin = AR $@ |
13dc8c02 | 400 | cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs) |
1da177e4 | 401 | |
e578edc7 | 402 | $(obj)/built-in.a: $(real-obj-y) FORCE |
5e18f029 | 403 | $(call if_changed,ar_builtin) |
1da177e4 | 404 | |
551559e1 TH |
405 | # |
406 | # Rule to create modules.order file | |
407 | # | |
408 | # Create commands to either record .ko file or cat modules.order from | |
409 | # a subdirectory | |
b2c88554 MY |
410 | # Add $(obj-m) as the prerequisite to avoid updating the timestamp of |
411 | # modules.order unless contained modules are updated. | |
412 | ||
413 | cmd_modules_order = { $(foreach m, $(real-prereqs), \ | |
414 | $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \ | |
e0e1b1ec | 415 | | $(AWK) '!x[$$0]++' - > $@ |
551559e1 | 416 | |
b2c88554 MY |
417 | $(obj)/modules.order: $(obj-m) FORCE |
418 | $(call if_changed,modules_order) | |
419 | ||
1da177e4 | 420 | # |
dee94953 | 421 | # Rule to compile a set of .o files into one .a file (with symbol table) |
1da177e4 | 422 | # |
e578edc7 | 423 | $(obj)/lib.a: $(lib-y) FORCE |
898f5a00 | 424 | $(call if_changed,ar) |
1da177e4 | 425 | |
afa974b7 MY |
426 | # NOTE: |
427 | # Do not replace $(filter %.o,^) with $(real-prereqs). When a single object | |
428 | # module is turned into a multi object module, $^ will contain header file | |
429 | # dependencies recorded in the .*.cmd file. | |
1da177e4 | 430 | quiet_cmd_link_multi-m = LD [M] $@ |
b7dca6dd | 431 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) |
1da177e4 | 432 | |
c8589d1e | 433 | $(multi-used-m): FORCE |
1da177e4 | 434 | $(call if_changed,link_multi-m) |
cf4f2193 | 435 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 | 436 | |
f98fe47c | 437 | targets += $(multi-used-m) |
591f6689 | 438 | targets := $(filter-out $(PHONY), $(targets)) |
1da177e4 | 439 | |
b23d1a24 MY |
440 | # Add intermediate targets: |
441 | # When building objects with specific suffix patterns, add intermediate | |
442 | # targets that the final targets are derived from. | |
443 | intermediate_targets = $(foreach sfx, $(2), \ | |
444 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
445 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 446 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 447 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
b23d1a24 MY |
448 | # %.lex.o <- %.lex.c <- %.l |
449 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
450 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
451 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
a7f92419 | 452 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
453 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
454 | ||
394053f4 MY |
455 | # Build |
456 | # --------------------------------------------------------------------------- | |
457 | ||
458 | ifdef single-build | |
459 | ||
20312629 MY |
460 | KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS)) |
461 | ||
394053f4 MY |
462 | curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ |
463 | $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x)))) | |
464 | ||
465 | # Handle single targets without any rule: show "Nothing to be done for ..." or | |
466 | # "No rule to make target ..." depending on whether the target exists. | |
467 | unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ | |
20312629 | 468 | $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) |
394053f4 | 469 | |
2dffd23f MY |
470 | single-subdirs := $(foreach d, $(subdir-ym), \ |
471 | $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) | |
472 | ||
473 | __build: $(curdir-single) $(single-subdirs) | |
394053f4 MY |
474 | ifneq ($(unknown-single),) |
475 | $(Q)$(MAKE) -f /dev/null $(unknown-single) | |
476 | endif | |
477 | @: | |
478 | ||
479 | ifeq ($(curdir-single),) | |
480 | # Nothing to do in this directory. Do not include any .*.cmd file for speed-up | |
481 | targets := | |
482 | else | |
483 | targets += $(curdir-single) | |
484 | endif | |
485 | ||
486 | else | |
487 | ||
f3908ab3 MY |
488 | __build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ |
489 | $(if $(KBUILD_MODULES), $(targets-for-modules)) \ | |
5f2fb52f | 490 | $(subdir-ym) $(always-y) |
394053f4 MY |
491 | @: |
492 | ||
493 | endif | |
494 | ||
1da177e4 LT |
495 | # Descending |
496 | # --------------------------------------------------------------------------- | |
497 | ||
4f193362 | 498 | PHONY += $(subdir-ym) |
1da177e4 | 499 | $(subdir-ym): |
d9f78edf | 500 | $(Q)$(MAKE) $(build)=$@ \ |
394053f4 | 501 | $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \ |
aaa385ba | 502 | need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ |
454753d9 | 503 | need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) |
1da177e4 LT |
504 | |
505 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
506 | # --------------------------------------------------------------------------- | |
507 | ||
4f193362 | 508 | PHONY += FORCE |
1da177e4 LT |
509 | |
510 | FORCE: | |
511 | ||
512 | # Read all saved command lines and dependencies for the $(targets) we | |
513 | # may be building above, using $(if_changed{,_dep}). As an | |
514 | # optimization, we don't need to read them if the target does not | |
515 | # exist, we will rebuild anyway in that case. | |
516 | ||
392885ee | 517 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 518 | |
392885ee | 519 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 520 | |
8a78756e | 521 | # Create directories for object files if they do not exist |
cc8a51ca | 522 | obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) |
392885ee MY |
523 | # If targets exist, their directories apparently exist. Skip mkdir. |
524 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
525 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 526 | ifneq ($(obj-dirs),) |
8a78756e MY |
527 | $(shell mkdir -p $(obj-dirs)) |
528 | endif | |
529 | ||
4f193362 | 530 | .PHONY: $(PHONY) |