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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 | ||
551559e1 TH |
66 | modorder-target := $(obj)/modules.order |
67 | ||
1da177e4 LT |
68 | # We keep a list of all modules in $(MODVERDIR) |
69 | ||
70 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ | |
551559e1 | 71 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
1da177e4 LT |
72 | $(subdir-ym) $(always) |
73 | @: | |
74 | ||
75 | # Linus' kernel sanity checking tool | |
7d0ea252 MY |
76 | ifeq ($(KBUILD_CHECKSRC),1) |
77 | quiet_cmd_checksrc = CHECK $< | |
e5d28910 | 78 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
7d0ea252 MY |
79 | else ifeq ($(KBUILD_CHECKSRC),2) |
80 | quiet_cmd_force_checksrc = CHECK $< | |
e5d28910 | 81 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< |
1da177e4 LT |
82 | endif |
83 | ||
3a025e1d | 84 | ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),) |
e5d28910 | 85 | cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< |
3a025e1d MW |
86 | endif |
87 | ||
f49821ee | 88 | # Do section mismatch analysis for each module/built-in.a |
91341d4b SR |
89 | ifdef CONFIG_DEBUG_SECTION_MISMATCH |
90 | cmd_secanalysis = ; scripts/mod/modpost $@ | |
91 | endif | |
1da177e4 LT |
92 | |
93 | # Compile C sources (.c) | |
94 | # --------------------------------------------------------------------------- | |
95 | ||
96 | # Default is built-in, unless we know otherwise | |
96c0a918 MY |
97 | $(foreach x, i lst o s, $(patsubst %.o,%.$(x),$(real-obj-m))): \ |
98 | part-of-module := y | |
99 | ||
6588169d SR |
100 | modkern_cflags = \ |
101 | $(if $(part-of-module), \ | |
102 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ | |
80c00ba9 | 103 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
45c4372d | 104 | quiet_modtag = $(if $(part-of-module),[M], ) |
1da177e4 | 105 | |
1da177e4 | 106 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
1e64ff42 | 107 | cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
1da177e4 | 108 | |
767e581d | 109 | $(obj)/%.s: $(src)/%.c FORCE |
1da177e4 LT |
110 | $(call if_changed_dep,cc_s_c) |
111 | ||
23d43848 MY |
112 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
113 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< | |
1da177e4 | 114 | |
767e581d | 115 | $(obj)/%.i: $(src)/%.c FORCE |
23d43848 | 116 | $(call if_changed_dep,cpp_i_c) |
1da177e4 | 117 | |
4efca4ed NP |
118 | # These mirror gensymtypes_S and co below, keep them in synch. |
119 | cmd_gensymtypes_c = \ | |
37a8d9f6 | 120 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
d70f82ac | 121 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
56067812 | 122 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
37a8d9f6 | 123 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 124 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 125 | |
15fde675 | 126 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 | 127 | cmd_cc_symtypes_c = \ |
4efca4ed | 128 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
37a8d9f6 | 129 | test -s $@ || rm -f $@ |
15fde675 | 130 | |
767e581d | 131 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 132 | $(call cmd,cc_symtypes_c) |
15fde675 | 133 | |
433db3e2 VT |
134 | # LLVM assembly |
135 | # Generate .ll files from .c | |
136 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ | |
137 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< | |
138 | ||
139 | $(obj)/%.ll: $(src)/%.c FORCE | |
140 | $(call if_changed_dep,cc_ll_c) | |
141 | ||
1da177e4 LT |
142 | # C (.c) files |
143 | # The C file is compiled and updated dependency information is generated. | |
144 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
145 | ||
146 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
ee3e46b7 | 147 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
1da177e4 | 148 | |
ee3e46b7 | 149 | ifdef CONFIG_MODVERSIONS |
1da177e4 | 150 | # When module versioning is enabled the following steps are executed: |
ee3e46b7 MY |
151 | # o compile a <file>.o from <file>.c |
152 | # o if <file>.o doesn't contain a __ksymtab version, i.e. does | |
153 | # not export symbols, it's done. | |
1da177e4 LT |
154 | # o otherwise, we calculate symbol versions using the good old |
155 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 | 156 | # that they are usable as a linker script |
ee3e46b7 | 157 | # o generate .tmp_<file>.o from <file>.o using the linker to |
2ea03891 SR |
158 | # replace the unresolved symbols __crc_exported_symbol with |
159 | # the actual value of the checksum generated by genksyms | |
ee3e46b7 | 160 | # o remove .tmp_<file>.o to <file>.o |
4efca4ed NP |
161 | |
162 | cmd_modversions_c = \ | |
ee3e46b7 | 163 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed | 164 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
e26d6b83 DZ |
165 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
166 | \ | |
ee3e46b7 | 167 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
e26d6b83 | 168 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
e26d6b83 | 169 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 170 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 171 | fi |
1da177e4 LT |
172 | endif |
173 | ||
8da3821b | 174 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
07d04081 VG |
175 | ifndef CC_USING_RECORD_MCOUNT |
176 | # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl | |
72441cb1 | 177 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
178 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
179 | RECORDMCOUNT_FLAGS = -w | |
180 | endif | |
d7b4d6de SR |
181 | # Due to recursion, we must skip empty.o. |
182 | # The empty.o file is created in the make process in order to determine | |
312a3d09 C |
183 | # the target endianness and word size. It is made before all other C |
184 | # files, including recordmcount. | |
45677454 WZ |
185 | sub_cmd_record_mcount = \ |
186 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 187 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 188 | fi; |
d6971822 MM |
189 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
190 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 191 | else |
4317ee3b | 192 | sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 193 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 194 | "$(if $(CONFIG_64BIT),64,32)" \ |
5a4630aa | 195 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \ |
d503ac53 | 196 | "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \ |
18c167fd | 197 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 198 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
312a3d09 | 199 | endif # BUILD_C_RECORDMCOUNT |
c0a80c0c HC |
200 | cmd_record_mcount = \ |
201 | if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ | |
202 | "$(CC_FLAGS_FTRACE)" ]; then \ | |
45677454 | 203 | $(sub_cmd_record_mcount) \ |
e5d28910 | 204 | fi |
07d04081 | 205 | endif # CC_USING_RECORD_MCOUNT |
312a3d09 | 206 | endif # CONFIG_FTRACE_MCOUNT_RECORD |
8da3821b | 207 | |
b9ab5ebb | 208 | ifdef CONFIG_STACK_VALIDATION |
3b27a0c8 | 209 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
210 | |
211 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
212 | ||
11af8474 | 213 | objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) |
ee9f8fce | 214 | |
ca41b97e PZ |
215 | objtool_args += $(if $(part-of-module), --module,) |
216 | ||
b9ab5ebb JP |
217 | ifndef CONFIG_FRAME_POINTER |
218 | objtool_args += --no-fp | |
219 | endif | |
867ac9d7 JP |
220 | ifdef CONFIG_GCOV_KERNEL |
221 | objtool_args += --no-unreachable | |
222 | endif | |
b5bc2231 | 223 | ifdef CONFIG_RETPOLINE |
d5028ba8 | 224 | ifneq ($(RETPOLINE_CFLAGS),) |
b5bc2231 PZ |
225 | objtool_args += --retpoline |
226 | endif | |
d5028ba8 | 227 | endif |
b5bc2231 | 228 | |
b9ab5ebb JP |
229 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory |
230 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
231 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
232 | cmd_objtool = $(if $(patsubst y%,, \ | |
233 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
e5d28910 | 234 | $(__objtool_obj) $(objtool_args) $@) |
b9ab5ebb JP |
235 | objtool_obj = $(if $(patsubst y%,, \ |
236 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
237 | $(__objtool_obj)) | |
238 | ||
3b27a0c8 | 239 | endif # SKIP_STACK_VALIDATION |
b9ab5ebb JP |
240 | endif # CONFIG_STACK_VALIDATION |
241 | ||
ee9f8fce JP |
242 | # Rebuild all objects when objtool changes, or is enabled/disabled. |
243 | objtool_dep = $(objtool_obj) \ | |
244 | $(wildcard include/config/orc/unwinder.h \ | |
245 | include/config/stack/validation.h) | |
246 | ||
bbda5ec6 MY |
247 | ifdef CONFIG_TRIM_UNUSED_KSYMS |
248 | cmd_gen_ksymdeps = \ | |
e5d28910 | 249 | $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd |
bbda5ec6 MY |
250 | endif |
251 | ||
1da177e4 | 252 | define rule_cc_o_c |
3a2429e1 MY |
253 | $(call cmd,checksrc) |
254 | $(call cmd_and_fixdep,cc_o_c) | |
255 | $(call cmd,gen_ksymdeps) | |
256 | $(call cmd,checkdoc) | |
257 | $(call cmd,objtool) | |
258 | $(call cmd,modversions_c) | |
259 | $(call cmd,record_mcount) | |
1da177e4 LT |
260 | endef |
261 | ||
b9ab5ebb | 262 | define rule_as_o_S |
3a2429e1 MY |
263 | $(call cmd_and_fixdep,as_o_S) |
264 | $(call cmd,gen_ksymdeps) | |
265 | $(call cmd,objtool) | |
266 | $(call cmd,modversions_S) | |
b9ab5ebb JP |
267 | endef |
268 | ||
9895c03d NP |
269 | # List module undefined symbols (or empty line if not enabled) |
270 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
1fe7d2bb | 271 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ *U //p' | xargs echo |
9895c03d NP |
272 | else |
273 | cmd_undef_syms = echo | |
274 | endif | |
275 | ||
1da177e4 | 276 | # Built-in and composite module parts |
ee9f8fce | 277 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 LT |
278 | $(call cmd,force_checksrc) |
279 | $(call if_changed_rule,cc_o_c) | |
280 | ||
281 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
282 | ||
ee9f8fce | 283 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE |
1da177e4 LT |
284 | $(call cmd,force_checksrc) |
285 | $(call if_changed_rule,cc_o_c) | |
9895c03d NP |
286 | @{ echo $(@:.o=.ko); echo $@; \ |
287 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
1da177e4 LT |
288 | |
289 | quiet_cmd_cc_lst_c = MKLST $@ | |
290 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
291 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
292 | System.map $(OBJDUMP) > $@ | |
293 | ||
767e581d | 294 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
295 | $(call if_changed_dep,cc_lst_c) |
296 | ||
297 | # Compile assembler sources (.S) | |
298 | # --------------------------------------------------------------------------- | |
299 | ||
80c00ba9 | 300 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
1da177e4 | 301 | |
f5f33681 MY |
302 | $(real-obj-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
303 | $(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
1da177e4 | 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 = \ | |
317 | (echo "\#include <linux/kernel.h>" ; \ | |
318 | echo "\#include <asm/asm-prototypes.h>" ; \ | |
319 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 NP |
320 | grep "\<___EXPORT_SYMBOL\>" | \ |
321 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \ | |
4efca4ed NP |
322 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
323 | $(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 | |
ee3e46b7 | 346 | ifdef CONFIG_MODVERSIONS |
4efca4ed NP |
347 | |
348 | ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) | |
349 | ||
ee3e46b7 | 350 | ifneq ($(ASM_PROTOTYPES),) |
4efca4ed NP |
351 | |
352 | # versioning matches the C process described above, with difference that | |
353 | # we parse asm-prototypes.h C header to get function definitions. | |
354 | ||
4efca4ed | 355 | cmd_modversions_S = \ |
ee3e46b7 | 356 | if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ |
4efca4ed NP |
357 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
358 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
359 | \ | |
ee3e46b7 | 360 | $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ |
4efca4ed | 361 | -T $(@D)/.tmp_$(@F:.o=.ver); \ |
4efca4ed | 362 | mv -f $(@D)/.tmp_$(@F) $@; \ |
ee3e46b7 | 363 | rm -f $(@D)/.tmp_$(@F:.o=.ver); \ |
e5d28910 | 364 | fi |
4efca4ed NP |
365 | endif |
366 | endif | |
1da177e4 | 367 | |
ee9f8fce | 368 | $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE |
b9ab5ebb | 369 | $(call if_changed_rule,as_o_S) |
1da177e4 | 370 | |
f98fe47c | 371 | targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y) |
1da177e4 LT |
372 | targets += $(extra-y) $(MAKECMDGOALS) $(always) |
373 | ||
374 | # Linker scripts preprocessor (.lds.S -> .lds) | |
375 | # --------------------------------------------------------------------------- | |
376 | quiet_cmd_cpp_lds_S = LDS $@ | |
5cb0512c | 377 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \ |
42f29a25 | 378 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 379 | |
767e581d | 380 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
381 | $(call if_changed_dep,cpp_lds_S) |
382 | ||
4520c6a4 DH |
383 | # ASN.1 grammar |
384 | # --------------------------------------------------------------------------- | |
385 | quiet_cmd_asn1_compiler = ASN.1 $@ | |
386 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ | |
387 | $(subst .h,.c,$@) $(subst .c,.h,$@) | |
388 | ||
4fa8bc94 | 389 | $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
4520c6a4 DH |
390 | $(call cmd,asn1_compiler) |
391 | ||
1da177e4 LT |
392 | # Build the compiled-in targets |
393 | # --------------------------------------------------------------------------- | |
394 | ||
395 | # To build objects in subdirs, we need to descend into the directories | |
396 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
397 | ||
398 | # | |
399 | # Rule to compile a set of .o files into one .o file | |
400 | # | |
401 | ifdef builtin-target | |
a5967db9 | 402 | |
f49821ee | 403 | # built-in.a archives are made with no symbol table or index which |
6358d6e8 | 404 | # makes them small and fast, but unable to be used by the linker. |
f49821ee | 405 | # scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol |
6358d6e8 | 406 | # table and index. |
5e18f029 MY |
407 | quiet_cmd_ar_builtin = AR $@ |
408 | cmd_ar_builtin = rm -f $@; \ | |
409 | $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^) | |
1da177e4 | 410 | |
f98fe47c | 411 | $(builtin-target): $(real-obj-y) FORCE |
5e18f029 | 412 | $(call if_changed,ar_builtin) |
1da177e4 LT |
413 | |
414 | targets += $(builtin-target) | |
415 | endif # builtin-target | |
416 | ||
551559e1 TH |
417 | # |
418 | # Rule to create modules.order file | |
419 | # | |
420 | # Create commands to either record .ko file or cat modules.order from | |
421 | # a subdirectory | |
422 | modorder-cmds = \ | |
423 | $(foreach m, $(modorder), \ | |
424 | $(if $(filter %/modules.order, $m), \ | |
425 | cat $m;, echo kernel/$m;)) | |
426 | ||
427 | $(modorder-target): $(subdir-ym) FORCE | |
428 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
429 | ||
1da177e4 LT |
430 | # |
431 | # Rule to compile a set of .o files into one .a file | |
432 | # | |
433 | ifdef lib-target | |
434 | quiet_cmd_link_l_target = AR $@ | |
a5967db9 | 435 | |
6358d6e8 NP |
436 | # lib target archives do get a symbol table and index |
437 | cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) | |
1da177e4 LT |
438 | |
439 | $(lib-target): $(lib-y) FORCE | |
440 | $(call if_changed,link_l_target) | |
441 | ||
442 | targets += $(lib-target) | |
7f2084fa AV |
443 | |
444 | dummy-object = $(obj)/.lib_exports.o | |
445 | ksyms-lds = $(dot-target).lds | |
7f2084fa AV |
446 | |
447 | quiet_cmd_export_list = EXPORTS $@ | |
448 | cmd_export_list = $(OBJDUMP) -h $< | \ | |
704db543 | 449 | sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\ |
7f2084fa | 450 | rm -f $(dummy-object);\ |
9da2f584 | 451 | echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ |
7f2084fa AV |
452 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ |
453 | rm $(dummy-object) $(ksyms-lds) | |
454 | ||
455 | $(obj)/lib-ksyms.o: $(lib-target) FORCE | |
456 | $(call if_changed,export_list) | |
989cea5c NP |
457 | |
458 | targets += $(obj)/lib-ksyms.o | |
459 | ||
1da177e4 LT |
460 | endif |
461 | ||
1da177e4 | 462 | quiet_cmd_link_multi-m = LD [M] $@ |
69ea912f | 463 | cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis) |
1da177e4 | 464 | |
c8589d1e | 465 | $(multi-used-m): FORCE |
1da177e4 | 466 | $(call if_changed,link_multi-m) |
69ea912f | 467 | @{ echo $(@:.o=.ko); echo $(filter %.o,$^); \ |
9895c03d | 468 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) |
cf4f2193 | 469 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 | 470 | |
f98fe47c | 471 | targets += $(multi-used-m) |
591f6689 | 472 | targets := $(filter-out $(PHONY), $(targets)) |
1da177e4 | 473 | |
b23d1a24 MY |
474 | # Add intermediate targets: |
475 | # When building objects with specific suffix patterns, add intermediate | |
476 | # targets that the final targets are derived from. | |
477 | intermediate_targets = $(foreach sfx, $(2), \ | |
478 | $(patsubst %$(strip $(1)),%$(sfx), \ | |
479 | $(filter %$(strip $(1)), $(targets)))) | |
54a702f7 | 480 | # %.asn1.o <- %.asn1.[ch] <- %.asn1 |
a7f92419 | 481 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
b23d1a24 MY |
482 | # %.lex.o <- %.lex.c <- %.l |
483 | # %.tab.o <- %.tab.[ch] <- %.y | |
54a702f7 MY |
484 | targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ |
485 | $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ | |
a7f92419 | 486 | $(call intermediate_targets, .lex.o, .lex.c) \ |
b23d1a24 MY |
487 | $(call intermediate_targets, .tab.o, .tab.c .tab.h) |
488 | ||
1da177e4 LT |
489 | # Descending |
490 | # --------------------------------------------------------------------------- | |
491 | ||
4f193362 | 492 | PHONY += $(subdir-ym) |
1da177e4 | 493 | $(subdir-ym): |
f7adc312 | 494 | $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1) |
1da177e4 LT |
495 | |
496 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
497 | # --------------------------------------------------------------------------- | |
498 | ||
4f193362 | 499 | PHONY += FORCE |
1da177e4 LT |
500 | |
501 | FORCE: | |
502 | ||
503 | # Read all saved command lines and dependencies for the $(targets) we | |
504 | # may be building above, using $(if_changed{,_dep}). As an | |
505 | # optimization, we don't need to read them if the target does not | |
506 | # exist, we will rebuild anyway in that case. | |
507 | ||
392885ee | 508 | existing-targets := $(wildcard $(sort $(targets))) |
1da177e4 | 509 | |
392885ee | 510 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
4f193362 | 511 | |
8a78756e MY |
512 | ifneq ($(KBUILD_SRC),) |
513 | # Create directories for object files if they do not exist | |
514 | obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) | |
392885ee MY |
515 | # If targets exist, their directories apparently exist. Skip mkdir. |
516 | existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) | |
517 | obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) | |
c4da7ed0 | 518 | ifneq ($(obj-dirs),) |
8a78756e MY |
519 | $(shell mkdir -p $(obj-dirs)) |
520 | endif | |
c4da7ed0 | 521 | endif |
8a78756e | 522 | |
4f193362 | 523 | .PHONY: $(PHONY) |