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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 := | |
19 | targets := | |
20 | subdir-y := | |
21 | subdir-m := | |
22 | EXTRA_AFLAGS := | |
23 | EXTRA_CFLAGS := | |
24 | EXTRA_CPPFLAGS := | |
25 | EXTRA_LDFLAGS := | |
f77bf014 SR |
26 | asflags-y := |
27 | ccflags-y := | |
28 | cppflags-y := | |
29 | ldflags-y := | |
d72e5edb | 30 | |
720097d8 SR |
31 | subdir-asflags-y := |
32 | subdir-ccflags-y := | |
33 | ||
3156fd05 | 34 | # Read auto.conf if it exists, otherwise ignore |
c955ccaf | 35 | -include include/config/auto.conf |
1da177e4 | 36 | |
20a468b5 SR |
37 | include scripts/Kbuild.include |
38 | ||
2a691470 | 39 | # The filename Kbuild has precedence over Makefile |
db8c1a7b | 40 | kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
0c53c8e6 SR |
41 | kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
42 | include $(kbuild-file) | |
43 | ||
1da177e4 LT |
44 | include scripts/Makefile.lib |
45 | ||
3156fd05 | 46 | # Do not include host rules unless needed |
24403874 | 47 | ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),) |
1da177e4 LT |
48 | include scripts/Makefile.host |
49 | endif | |
50 | ||
1da177e4 LT |
51 | ifndef obj |
52 | $(warning kbuild: Makefile.build is included improperly) | |
53 | endif | |
54 | ||
55 | # =========================================================================== | |
56 | ||
a4954fd7 | 57 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
1da177e4 | 58 | lib-target := $(obj)/lib.a |
f98fe47c | 59 | real-obj-y += $(obj)/lib-ksyms.o |
1da177e4 LT |
60 | endif |
61 | ||
f98fe47c | 62 | ifneq ($(strip $(real-obj-y) $(need-builtin)),) |
f49821ee | 63 | builtin-target := $(obj)/built-in.a |
1da177e4 LT |
64 | endif |
65 | ||
1d8001ef | 66 | ifdef CONFIG_MODULES |
551559e1 | 67 | modorder-target := $(obj)/modules.order |
1d8001ef | 68 | endif |
551559e1 | 69 | |
1da177e4 LT |
70 | # We keep a list of all modules in $(MODVERDIR) |
71 | ||
72 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ | |
551559e1 | 73 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
1da177e4 LT |
74 | $(subdir-ym) $(always) |
75 | @: | |
76 | ||
77 | # Linus' kernel sanity checking tool | |
7d0ea252 MY |
78 | ifeq ($(KBUILD_CHECKSRC),1) |
79 | quiet_cmd_checksrc = CHECK $< | |
e5d28910 | 80 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
7d0ea252 MY |
81 | else ifeq ($(KBUILD_CHECKSRC),2) |
82 | quiet_cmd_force_checksrc = CHECK $< | |
e5d28910 | 83 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
1da177e4 LT |
84 | endif |
85 | ||
3a025e1d | 86 | ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),) |
e5d28910 | 87 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< |
3a025e1d MW |
88 | endif |
89 | ||
f49821ee | 90 | # Do section mismatch analysis for each module/built-in.a |
91341d4b SR |
91 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
92 | cmd_secanalysis = ; scripts/mod/modpost $@ | |
93 | endif | |
1da177e4 LT |
94 | |
95 | # Compile C sources (.c) | |
96 | # --------------------------------------------------------------------------- | |
97 | ||
98 | # Default is built-in, unless we know otherwise | |
1d467bb8 | 99 | $(foreach x, i ll lst o s symtypes, $(patsubst %.o,%.$(x),$(real-obj-m))): \ |
96c0a918 MY |
100 | part-of-module := y |
101 | ||
6588169d SR |
102 | modkern_cflags = \ |
103 | $(if $(part-of-module), \ | |
104 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ | |
80c00ba9 | 105 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
45c4372d | 106 | quiet_modtag = $(if $(part-of-module),[M], ) |
1da177e4 | 107 | |
1da177e4 | 108 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
1e88e415 | 109 | cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
1da177e4 | 110 | |
767e581d | 111 | $(obj)/%.s: $(src)/%.c FORCE |
1da177e4 LT |
112 | $(call if_changed_dep,cc_s_c) |
113 | ||
23d43848 MY |
114 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
115 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< | |
1da177e4 | 116 | |
767e581d | 117 | $(obj)/%.i: $(src)/%.c FORCE |
23d43848 | 118 | $(call if_changed_dep,cpp_i_c) |
1da177e4 | 119 | |
4efca4ed NP |
120 | # These mirror gensymtypes_S and co below, keep them in synch. |
121 | cmd_gensymtypes_c = \ | |
37a8d9f6 | 122 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
88110713 | 123 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
56067812 | 124 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
37a8d9f6 | 125 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 126 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 127 | |
15fde675 | 128 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 | 129 | cmd_cc_symtypes_c = \ |
4efca4ed | 130 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
37a8d9f6 | 131 | test -s $@ || rm -f $@ |
15fde675 | 132 | |
767e581d | 133 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 134 | $(call cmd,cc_symtypes_c) |
15fde675 | 135 | |
433db3e2 VT |
136 | # LLVM assembly |
137 | # Generate .ll files from .c | |
138 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ | |
139 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< | |
140 | ||
141 | $(obj)/%.ll: $(src)/%.c FORCE | |
142 | $(call if_changed_dep,cc_ll_c) | |
143 | ||
1da177e4 LT |
144 | # C (.c) files |
145 | # The C file is compiled and updated dependency information is generated. | |
146 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
147 | ||
148 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
ee3e46b7 | 149 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
1da177e4 | 150 | |
ee3e46b7 | 151 | ifdef CONFIG_MODVERSIONS |
1da177e4 | 152 | # When module versioning is enabled the following steps are executed: |
ee3e46b7 MY |
153 | # o compile a <file>.o from <file>.c |
154 | # o if <file>.o doesn't contain a __ksymtab version, i.e. does | |
155 | # not export symbols, it's done. | |
1da177e4 LT |
156 | # o otherwise, we calculate symbol versions using the good old |
157 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 | 158 | # that they are usable as a linker script |
ee3e46b7 | 159 | # o generate .tmp_<file>.o from <file>.o using the linker to |
2ea03891 SR |
160 | # replace the unresolved symbols __crc_exported_symbol with |
161 | # the actual value of the checksum generated by genksyms | |
ee3e46b7 | 162 | # o remove .tmp_<file>.o to <file>.o |
4efca4ed NP |
163 | |
164 | cmd_modversions_c = \ | |
ee3e46b7 | 165 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed | 166 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
e26d6b83 DZ |
167 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
168 | \ | |
ee3e46b7 | 169 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
e26d6b83 | 170 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
e26d6b83 | 171 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 172 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 173 | fi |
1da177e4 LT |
174 | endif |
175 | ||
8da3821b | 176 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
07d04081 VG |
177 | ifndef CC_USING_RECORD_MCOUNT |
178 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl | |
72441cb1 | 179 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
180 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
181 | RECORDMCOUNT_FLAGS = -w | |
182 | endif | |
d7b4d6de SR |
183 | # Due to recursion, we must skip empty.o. |
184 | # The empty.o file is created in the make process in order to determine | |
312a3d09 C |
185 | # the target endianness and word size. It is made before all other C |
186 | # files, including recordmcount. | |
45677454 WZ |
187 | sub_cmd_record_mcount = \ |
188 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 189 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 190 | fi; |
d6971822 MM |
191 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
192 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 193 | else |
4317ee3b | 194 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 195 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 196 | "$(if $(CONFIG_64BIT),64,32)" \ |
5a4630aa | 197 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
d503ac53 | 198 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
18c167fd | 199 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 200 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
312a3d09 | 201 | endif # BUILD_C_RECORDMCOUNT |
1a49b2fd JL |
202 | cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ |
203 | $(sub_cmd_record_mcount)) | |
07d04081 | 204 | endif # CC_USING_RECORD_MCOUNT |
312a3d09 | 205 | endif # CONFIG_FTRACE_MCOUNT_RECORD |
8da3821b | 206 | |
b9ab5ebb | 207 | ifdef CONFIG_STACK_VALIDATION |
3b27a0c8 | 208 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
209 | |
210 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
211 | ||
11af8474 | 212 | objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) |
ee9f8fce | 213 | |
ca41b97e PZ |
214 | objtool_args += $(if $(part-of-module), --module,) |
215 | ||
b9ab5ebb JP |
216 | ifndef CONFIG_FRAME_POINTER |
217 | objtool_args += --no-fp | |
218 | endif | |
867ac9d7 JP |
219 | ifdef CONFIG_GCOV_KERNEL |
220 | objtool_args += --no-unreachable | |
221 | endif | |
b5bc2231 PZ |
222 | ifdef CONFIG_RETPOLINE |
223 | objtool_args += --retpoline | |
224 | endif | |
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 |
b9ab5ebb JP |
237 | endif # CONFIG_STACK_VALIDATION |
238 | ||
ee9f8fce JP |
239 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
240 | objtool_dep = $(objtool_obj) \ | |
241 | $(wildcard include/config/orc/unwinder.h \ | |
242 | include/config/stack/validation.h) | |
243 | ||
bbda5ec6 MY |
244 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
245 | cmd_gen_ksymdeps = \ | |
e5d28910 | 246 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
bbda5ec6 MY |
247 | endif |
248 | ||
1da177e4 | 249 | define rule_cc_o_c |
3a2429e1 MY |
250 | $(call cmd,checksrc) |
251 | $(call cmd_and_fixdep,cc_o_c) | |
252 | $(call cmd,gen_ksymdeps) | |
253 | $(call cmd,checkdoc) | |
254 | $(call cmd,objtool) | |
255 | $(call cmd,modversions_c) | |
256 | $(call cmd,record_mcount) | |
1da177e4 LT |
257 | endef |
258 | ||
b9ab5ebb | 259 | define rule_as_o_S |
3a2429e1 MY |
260 | $(call cmd_and_fixdep,as_o_S) |
261 | $(call cmd,gen_ksymdeps) | |
262 | $(call cmd,objtool) | |
263 | $(call cmd,modversions_S) | |
b9ab5ebb JP |
264 | endef |
265 | ||
9895c03d NP |
266 | # List module undefined symbols (or empty line if not enabled) |
267 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1fe7d2bb | 268 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ *U //p' | xargs echo |
9895c03d NP |
269 | else |
270 | cmd_undef_syms = echo | |
271 | endif | |
272 | ||
1da177e4 | 273 | # Built-in and composite module parts |
ee9f8fce | 274 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 LT |
275 | $(call cmd,force_checksrc) |
276 | $(call if_changed_rule,cc_o_c) | |
277 | ||
278 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
279 | ||
ee9f8fce | 280 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 LT |
281 | $(call cmd,force_checksrc) |
282 | $(call if_changed_rule,cc_o_c) | |
9895c03d NP |
283 | @{ echo $(@:.o=.ko); echo $@; \ |
284 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
1da177e4 LT |
285 | |
286 | quiet_cmd_cc_lst_c = MKLST $@ | |
287 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
288 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
289 | System.map $(OBJDUMP) > $@ | |
290 | ||
767e581d | 291 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
292 | $(call if_changed_dep,cc_lst_c) |
293 | ||
294 | # Compile assembler sources (.S) | |
295 | # --------------------------------------------------------------------------- | |
296 | ||
80c00ba9 | 297 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
1da177e4 | 298 | |
f5f33681 MY |
299 | $(real-obj-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
300 | $(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
1da177e4 | 301 | |
4efca4ed NP |
302 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
303 | # or a file that it includes, in order to get versioned symbols. We build a | |
304 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
305 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
306 | # | |
307 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
308 | # expand names, then the resulting exports must be constructed into plain | |
309 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
310 | # to make the genksyms input. | |
311 | # | |
312 | # These mirror gensymtypes_c and co above, keep them in synch. | |
313 | cmd_gensymtypes_S = \ | |
b79c6aa6 | 314 | { echo "\#include <linux/kernel.h>" ; \ |
4efca4ed NP |
315 | echo "\#include <asm/asm-prototypes.h>" ; \ |
316 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 | 317 | grep "\<___EXPORT_SYMBOL\>" | \ |
b79c6aa6 | 318 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ |
4efca4ed | 319 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
88110713 | 320 | scripts/genksyms/genksyms $(if $(1), -T $(2)) \ |
56067812 | 321 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
4efca4ed NP |
322 | $(if $(KBUILD_PRESERVE),-p) \ |
323 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) | |
324 | ||
325 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
326 | cmd_cc_symtypes_S = \ | |
4efca4ed NP |
327 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ |
328 | test -s $@ || rm -f $@ | |
329 | ||
330 | $(obj)/%.symtypes : $(src)/%.S FORCE | |
331 | $(call cmd,cc_symtypes_S) | |
332 | ||
333 | ||
e0f41e52 MY |
334 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
335 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 336 | |
767e581d | 337 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 338 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
339 | |
340 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
ee3e46b7 | 341 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
4efca4ed | 342 | |
ee3e46b7 | 343 | ifdef CONFIG_MODVERSIONS |
4efca4ed NP |
344 | |
345 | ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) | |
346 | ||
ee3e46b7 | 347 | ifneq ($(ASM_PROTOTYPES),) |
4efca4ed NP |
348 | |
349 | # versioning matches the C process described above, with difference that | |
350 | # we parse asm-prototypes.h C header to get function definitions. | |
351 | ||
4efca4ed | 352 | cmd_modversions_S = \ |
ee3e46b7 | 353 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed NP |
354 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
355 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
356 | \ | |
ee3e46b7 | 357 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
4efca4ed | 358 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
4efca4ed | 359 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 360 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 361 | fi |
4efca4ed NP |
362 | endif |
363 | endif | |
1da177e4 | 364 | |
ee9f8fce | 365 | $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE |
b9ab5ebb | 366 | $(call if_changed_rule,as_o_S) |
1da177e4 | 367 | |
f98fe47c | 368 | targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y) |
1da177e4 LT |
369 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
370 | ||
371 | # Linker scripts preprocessor (.lds.S -> .lds) | |
372 | # --------------------------------------------------------------------------- | |
373 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 374 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 375 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 376 | |
767e581d | 377 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
378 | $(call if_changed_dep,cpp_lds_S) |
379 | ||
4520c6a4 DH |
380 | # ASN.1 grammar |
381 | # --------------------------------------------------------------------------- | |
382 | quiet_cmd_asn1_compiler = ASN.1 $@ | |
383 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ | |
384 | $(subst .h,.c,$@) $(subst .c,.h,$@) | |
385 | ||
4fa8bc94 | 386 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
387 | $(call cmd,asn1_compiler) |
388 | ||
1da177e4 LT |
389 | # Build the compiled-in targets |
390 | # --------------------------------------------------------------------------- | |
391 | ||
392 | # To build objects in subdirs, we need to descend into the directories | |
393 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
394 | ||
395 | # | |
dee94953 | 396 | # Rule to compile a set of .o files into one .a file (without symbol table) |
1da177e4 LT |
397 | # |
398 | ifdef builtin-target | |
a5967db9 | 399 | |
5e18f029 | 400 | quiet_cmd_ar_builtin = AR $@ |
afa974b7 | 401 | cmd_ar_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(real-prereqs) |
1da177e4 | 402 | |
f98fe47c | 403 | $(builtin-target): $(real-obj-y) FORCE |
5e18f029 | 404 | $(call if_changed,ar_builtin) |
1da177e4 LT |
405 | |
406 | targets += $(builtin-target) | |
407 | endif # builtin-target | |
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 | |
414 | modorder-cmds = \ | |
415 | $(foreach m, $(modorder), \ | |
416 | $(if $(filter %/modules.order, $m), \ | |
417 | cat $m;, echo kernel/$m;)) | |
418 | ||
419 | $(modorder-target): $(subdir-ym) FORCE | |
420 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
421 | ||
1da177e4 | 422 | # |
dee94953 | 423 | # Rule to compile a set of .o files into one .a file (with symbol table) |
1da177e4 LT |
424 | # |
425 | ifdef lib-target | |
1da177e4 LT |
426 | |
427 | $(lib-target): $(lib-y) FORCE | |
898f5a00 | 428 | $(call if_changed,ar) |
1da177e4 LT |
429 | |
430 | targets += $(lib-target) | |
7f2084fa AV |
431 | |
432 | dummy-object = $(obj)/.lib_exports.o | |
433 | ksyms-lds = $(dot-target).lds | |
7f2084fa AV |
434 | |
435 | quiet_cmd_export_list = EXPORTS $@ | |
436 | cmd_export_list = $(OBJDUMP) -h $< | \ | |
704db543 | 437 | sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\ |
7f2084fa | 438 | rm -f $(dummy-object);\ |
9da2f584 | 439 | echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ |
7f2084fa AV |
440 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ |
441 | rm $(dummy-object) $(ksyms-lds) | |
442 | ||
443 | $(obj)/lib-ksyms.o: $(lib-target) FORCE | |
444 | $(call if_changed,export_list) | |
989cea5c NP |
445 | |
446 | targets += $(obj)/lib-ksyms.o | |
447 | ||
1da177e4 LT |
448 | endif |
449 | ||
afa974b7 MY |
450 | # NOTE: |
451 | # Do not replace $(filter %.o,^) with $(real-prereqs). When a single object | |
452 | # module is turned into a multi object module, $^ will contain header file | |
453 | # dependencies recorded in the .*.cmd file. | |
1da177e4 | 454 | quiet_cmd_link_multi-m = LD [M] $@ |
69ea912f | 455 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis) |
1da177e4 | 456 | |
c8589d1e | 457 | $(multi-used-m): FORCE |
1da177e4 | 458 | $(call if_changed,link_multi-m) |
69ea912f | 459 | @{ echo $(@:.o=.ko); echo $(filter %.o,$^); \ |
9895c03d | 460 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
cf4f2193 | 461 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 | 462 | |
f98fe47c | 463 | targets += $(multi-used-m) |
591f6689 | 464 | targets := $(filter-out $(PHONY), $(targets)) |
1da177e4 | 465 | |
b23d1a24 MY |
466 | # Add intermediate targets: |
467 | # When building objects with specific suffix patterns, add intermediate | |
468 | # targets that the final targets are derived from. | |
469 | intermediate_targets = $(foreach sfx, $(2), \ | |
470 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
471 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 472 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 473 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
b23d1a24 MY |
474 | # %.lex.o <- %.lex.c <- %.l |
475 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
476 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
477 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
a7f92419 | 478 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
479 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
480 | ||
1da177e4 LT |
481 | # Descending |
482 | # --------------------------------------------------------------------------- | |
483 | ||
4f193362 | 484 | PHONY += $(subdir-ym) |
1da177e4 | 485 | $(subdir-ym): |
f7adc312 | 486 | $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1) |
1da177e4 LT |
487 | |
488 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
489 | # --------------------------------------------------------------------------- | |
490 | ||
4f193362 | 491 | PHONY += FORCE |
1da177e4 LT |
492 | |
493 | FORCE: | |
494 | ||
495 | # Read all saved command lines and dependencies for the $(targets) we | |
496 | # may be building above, using $(if_changed{,_dep}). As an | |
497 | # optimization, we don't need to read them if the target does not | |
498 | # exist, we will rebuild anyway in that case. | |
499 | ||
392885ee | 500 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 501 | |
392885ee | 502 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 503 | |
8a78756e MY |
504 | ifneq ($(KBUILD_SRC),) |
505 | # Create directories for object files if they do not exist | |
506 | obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) | |
392885ee MY |
507 | # If targets exist, their directories apparently exist. Skip mkdir. |
508 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
509 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 510 | ifneq ($(obj-dirs),) |
8a78756e MY |
511 | $(shell mkdir -p $(obj-dirs)) |
512 | endif | |
c4da7ed0 | 513 | endif |
8a78756e | 514 | |
4f193362 | 515 | .PHONY: $(PHONY) |