]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | # ========================================================================== |
2 | # Building | |
3 | # ========================================================================== | |
4 | ||
5 | src := $(obj) | |
6 | ||
4f193362 | 7 | PHONY := __build |
1da177e4 LT |
8 | __build: |
9 | ||
d72e5edb SR |
10 | # Init all relevant variables used in kbuild files so |
11 | # 1) they have correct type | |
12 | # 2) they do not inherit any value from the environment | |
13 | obj-y := | |
14 | obj-m := | |
15 | lib-y := | |
16 | lib-m := | |
17 | always := | |
18 | targets := | |
19 | subdir-y := | |
20 | subdir-m := | |
21 | EXTRA_AFLAGS := | |
22 | EXTRA_CFLAGS := | |
23 | EXTRA_CPPFLAGS := | |
24 | EXTRA_LDFLAGS := | |
f77bf014 SR |
25 | asflags-y := |
26 | ccflags-y := | |
27 | cppflags-y := | |
28 | ldflags-y := | |
d72e5edb | 29 | |
720097d8 SR |
30 | subdir-asflags-y := |
31 | subdir-ccflags-y := | |
32 | ||
3156fd05 | 33 | # Read auto.conf if it exists, otherwise ignore |
c955ccaf | 34 | -include include/config/auto.conf |
1da177e4 | 35 | |
20a468b5 SR |
36 | include scripts/Kbuild.include |
37 | ||
3156fd05 | 38 | # For backward compatibility check that these variables do not change |
0c53c8e6 SR |
39 | save-cflags := $(CFLAGS) |
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 $(kbuild-file) | |
45 | ||
46 | # If the save-* variables changed error out | |
47 | ifeq ($(KBUILD_NOPEDANTIC),) | |
48 | ifneq ("$(save-cflags)","$(CFLAGS)") | |
49c57d25 | 49 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) |
0c53c8e6 SR |
50 | endif |
51 | endif | |
4a5838ad | 52 | |
1da177e4 LT |
53 | include scripts/Makefile.lib |
54 | ||
55 | ifdef host-progs | |
56 | ifneq ($(hostprogs-y),$(host-progs)) | |
57 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) | |
58 | hostprogs-y += $(host-progs) | |
59 | endif | |
60 | endif | |
61 | ||
3156fd05 | 62 | # Do not include host rules unless needed |
24403874 | 63 | ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),) |
1da177e4 LT |
64 | include scripts/Makefile.host |
65 | endif | |
66 | ||
67 | ifneq ($(KBUILD_SRC),) | |
68 | # Create output directory if not already present | |
69 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) | |
70 | ||
71 | # Create directories for object files if directory does not exist | |
72 | # Needed when obj-y := dir/file.o syntax is used | |
73 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) | |
74 | endif | |
75 | ||
1da177e4 LT |
76 | ifndef obj |
77 | $(warning kbuild: Makefile.build is included improperly) | |
78 | endif | |
79 | ||
80 | # =========================================================================== | |
81 | ||
a4954fd7 | 82 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
1da177e4 | 83 | lib-target := $(obj)/lib.a |
7f2084fa | 84 | obj-y += $(obj)/lib-ksyms.o |
1da177e4 LT |
85 | endif |
86 | ||
a4954fd7 | 87 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) |
1da177e4 LT |
88 | builtin-target := $(obj)/built-in.o |
89 | endif | |
90 | ||
551559e1 TH |
91 | modorder-target := $(obj)/modules.order |
92 | ||
1da177e4 LT |
93 | # We keep a list of all modules in $(MODVERDIR) |
94 | ||
95 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ | |
551559e1 | 96 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
1da177e4 LT |
97 | $(subdir-ym) $(always) |
98 | @: | |
99 | ||
100 | # Linus' kernel sanity checking tool | |
101 | ifneq ($(KBUILD_CHECKSRC),0) | |
102 | ifeq ($(KBUILD_CHECKSRC),2) | |
103 | quiet_cmd_force_checksrc = CHECK $< | |
104 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
105 | else | |
106 | quiet_cmd_checksrc = CHECK $< | |
107 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
108 | endif | |
109 | endif | |
110 | ||
91341d4b SR |
111 | # Do section mismatch analysis for each module/built-in.o |
112 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
113 | cmd_secanalysis = ; scripts/mod/modpost $@ | |
114 | endif | |
1da177e4 LT |
115 | |
116 | # Compile C sources (.c) | |
117 | # --------------------------------------------------------------------------- | |
118 | ||
119 | # Default is built-in, unless we know otherwise | |
6588169d SR |
120 | modkern_cflags = \ |
121 | $(if $(part-of-module), \ | |
122 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ | |
80c00ba9 | 123 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
1da177e4 LT |
124 | quiet_modtag := $(empty) $(empty) |
125 | ||
18c167fd SL |
126 | $(real-objs-m) : part-of-module := y |
127 | $(real-objs-m:.o=.i) : part-of-module := y | |
128 | $(real-objs-m:.o=.s) : part-of-module := y | |
129 | $(real-objs-m:.o=.lst): part-of-module := y | |
1da177e4 LT |
130 | |
131 | $(real-objs-m) : quiet_modtag := [M] | |
132 | $(real-objs-m:.o=.i) : quiet_modtag := [M] | |
133 | $(real-objs-m:.o=.s) : quiet_modtag := [M] | |
134 | $(real-objs-m:.o=.lst): quiet_modtag := [M] | |
135 | ||
136 | $(obj-m) : quiet_modtag := [M] | |
137 | ||
138 | # Default for not multi-part modules | |
5e8d780d | 139 | modname = $(basetarget) |
1da177e4 LT |
140 | |
141 | $(multi-objs-m) : modname = $(modname-multi) | |
142 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) | |
143 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) | |
144 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) | |
145 | $(multi-objs-y) : modname = $(modname-multi) | |
146 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) | |
147 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) | |
148 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) | |
149 | ||
150 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ | |
1e64ff42 | 151 | cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
1da177e4 | 152 | |
767e581d | 153 | $(obj)/%.s: $(src)/%.c FORCE |
1da177e4 LT |
154 | $(call if_changed_dep,cc_s_c) |
155 | ||
23d43848 MY |
156 | quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@ |
157 | cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< | |
1da177e4 | 158 | |
767e581d | 159 | $(obj)/%.i: $(src)/%.c FORCE |
23d43848 | 160 | $(call if_changed_dep,cpp_i_c) |
1da177e4 | 161 | |
4efca4ed NP |
162 | # These mirror gensymtypes_S and co below, keep them in synch. |
163 | cmd_gensymtypes_c = \ | |
37a8d9f6 | 164 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
d70f82ac JH |
165 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
166 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ | |
56067812 | 167 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
37a8d9f6 | 168 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 169 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 170 | |
15fde675 | 171 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 SR |
172 | cmd_cc_symtypes_c = \ |
173 | set -e; \ | |
4efca4ed | 174 | $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ |
37a8d9f6 | 175 | test -s $@ || rm -f $@ |
15fde675 | 176 | |
767e581d | 177 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 178 | $(call cmd,cc_symtypes_c) |
15fde675 | 179 | |
433db3e2 VT |
180 | # LLVM assembly |
181 | # Generate .ll files from .c | |
182 | quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ | |
183 | cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< | |
184 | ||
185 | $(obj)/%.ll: $(src)/%.c FORCE | |
186 | $(call if_changed_dep,cc_ll_c) | |
187 | ||
1da177e4 LT |
188 | # C (.c) files |
189 | # The C file is compiled and updated dependency information is generated. | |
190 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
191 | ||
192 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
193 | ||
194 | ifndef CONFIG_MODVERSIONS | |
195 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
196 | ||
197 | else | |
198 | # When module versioning is enabled the following steps are executed: | |
2ea03891 SR |
199 | # o compile a .tmp_<file>.o from <file>.c |
200 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does | |
201 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and | |
1da177e4 LT |
202 | # are done. |
203 | # o otherwise, we calculate symbol versions using the good old | |
204 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 SR |
205 | # that they are usable as a linker script |
206 | # o generate <file>.o from .tmp_<file>.o using the linker to | |
207 | # replace the unresolved symbols __crc_exported_symbol with | |
208 | # the actual value of the checksum generated by genksyms | |
1da177e4 | 209 | |
2ea03891 | 210 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
4efca4ed NP |
211 | |
212 | cmd_modversions_c = \ | |
e26d6b83 | 213 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
4efca4ed | 214 | $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
e26d6b83 DZ |
215 | > $(@D)/.tmp_$(@F:.o=.ver); \ |
216 | \ | |
217 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ | |
218 | -T $(@D)/.tmp_$(@F:.o=.ver); \ | |
219 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ | |
220 | else \ | |
221 | mv -f $(@D)/.tmp_$(@F) $@; \ | |
1da177e4 LT |
222 | fi; |
223 | endif | |
224 | ||
8da3821b | 225 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
72441cb1 | 226 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
227 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
228 | RECORDMCOUNT_FLAGS = -w | |
229 | endif | |
d7b4d6de SR |
230 | # Due to recursion, we must skip empty.o. |
231 | # The empty.o file is created in the make process in order to determine | |
232 | # the target endianness and word size. It is made before all other C | |
233 | # files, including recordmcount. | |
45677454 WZ |
234 | sub_cmd_record_mcount = \ |
235 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 236 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 237 | fi; |
d6971822 MM |
238 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
239 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 240 | else |
45677454 | 241 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 242 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 243 | "$(if $(CONFIG_64BIT),64,32)" \ |
f9810a82 RV |
244 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
245 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ | |
18c167fd | 246 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 247 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
8da3821b | 248 | endif |
c0a80c0c HC |
249 | cmd_record_mcount = \ |
250 | if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ | |
251 | "$(CC_FLAGS_FTRACE)" ]; then \ | |
45677454 WZ |
252 | $(sub_cmd_record_mcount) \ |
253 | fi; | |
72441cb1 | 254 | endif |
8da3821b | 255 | |
b9ab5ebb | 256 | ifdef CONFIG_STACK_VALIDATION |
3b27a0c8 | 257 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
258 | |
259 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
260 | ||
261 | objtool_args = check | |
262 | ifndef CONFIG_FRAME_POINTER | |
263 | objtool_args += --no-fp | |
264 | endif | |
867ac9d7 JP |
265 | ifdef CONFIG_GCOV_KERNEL |
266 | objtool_args += --no-unreachable | |
267 | endif | |
b9ab5ebb JP |
268 | |
269 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory | |
270 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
271 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
272 | cmd_objtool = $(if $(patsubst y%,, \ | |
273 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
274 | $(__objtool_obj) $(objtool_args) "$(@)";) | |
275 | objtool_obj = $(if $(patsubst y%,, \ | |
276 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
277 | $(__objtool_obj)) | |
278 | ||
3b27a0c8 | 279 | endif # SKIP_STACK_VALIDATION |
b9ab5ebb JP |
280 | endif # CONFIG_STACK_VALIDATION |
281 | ||
1da177e4 | 282 | define rule_cc_o_c |
6176aa9a | 283 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
e4aca459 | 284 | $(call cmd_and_fixdep,cc_o_c) \ |
4efca4ed | 285 | $(cmd_modversions_c) \ |
e8a3118e | 286 | $(call echo-cmd,objtool) $(cmd_objtool) \ |
e4aca459 | 287 | $(call echo-cmd,record_mcount) $(cmd_record_mcount) |
1da177e4 LT |
288 | endef |
289 | ||
b9ab5ebb | 290 | define rule_as_o_S |
e4aca459 | 291 | $(call cmd_and_fixdep,as_o_S) \ |
4efca4ed | 292 | $(cmd_modversions_S) \ |
e8a3118e | 293 | $(call echo-cmd,objtool) $(cmd_objtool) |
b9ab5ebb JP |
294 | endef |
295 | ||
9895c03d NP |
296 | # List module undefined symbols (or empty line if not enabled) |
297 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
298 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo | |
299 | else | |
300 | cmd_undef_syms = echo | |
301 | endif | |
302 | ||
1da177e4 | 303 | # Built-in and composite module parts |
b9ab5ebb | 304 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
1da177e4 LT |
305 | $(call cmd,force_checksrc) |
306 | $(call if_changed_rule,cc_o_c) | |
307 | ||
308 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
309 | ||
b9ab5ebb | 310 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
1da177e4 LT |
311 | $(call cmd,force_checksrc) |
312 | $(call if_changed_rule,cc_o_c) | |
9895c03d NP |
313 | @{ echo $(@:.o=.ko); echo $@; \ |
314 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
1da177e4 LT |
315 | |
316 | quiet_cmd_cc_lst_c = MKLST $@ | |
317 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
318 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
319 | System.map $(OBJDUMP) > $@ | |
320 | ||
767e581d | 321 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
322 | $(call if_changed_dep,cc_lst_c) |
323 | ||
324 | # Compile assembler sources (.S) | |
325 | # --------------------------------------------------------------------------- | |
326 | ||
80c00ba9 | 327 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
1da177e4 | 328 | |
6588169d SR |
329 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
330 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
1da177e4 | 331 | |
4efca4ed NP |
332 | # .S file exports must have their C prototypes defined in asm/asm-prototypes.h |
333 | # or a file that it includes, in order to get versioned symbols. We build a | |
334 | # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from | |
335 | # the .S file (with trailing ';'), and run genksyms on that, to extract vers. | |
336 | # | |
337 | # This is convoluted. The .S file must first be preprocessed to run guards and | |
338 | # expand names, then the resulting exports must be constructed into plain | |
339 | # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed | |
340 | # to make the genksyms input. | |
341 | # | |
342 | # These mirror gensymtypes_c and co above, keep them in synch. | |
343 | cmd_gensymtypes_S = \ | |
344 | (echo "\#include <linux/kernel.h>" ; \ | |
345 | echo "\#include <asm/asm-prototypes.h>" ; \ | |
346 | $(CPP) $(a_flags) $< | \ | |
cc6acc11 NP |
347 | grep "\<___EXPORT_SYMBOL\>" | \ |
348 | sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \ | |
4efca4ed NP |
349 | $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ |
350 | $(GENKSYMS) $(if $(1), -T $(2)) \ | |
351 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ | |
56067812 | 352 | $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ |
4efca4ed NP |
353 | $(if $(KBUILD_PRESERVE),-p) \ |
354 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) | |
355 | ||
356 | quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ | |
357 | cmd_cc_symtypes_S = \ | |
358 | set -e; \ | |
359 | $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ | |
360 | test -s $@ || rm -f $@ | |
361 | ||
362 | $(obj)/%.symtypes : $(src)/%.S FORCE | |
363 | $(call cmd,cc_symtypes_S) | |
364 | ||
365 | ||
e0f41e52 MY |
366 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
367 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 368 | |
767e581d | 369 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 370 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
371 | |
372 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
4efca4ed NP |
373 | |
374 | ifndef CONFIG_MODVERSIONS | |
375 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
376 | ||
377 | else | |
378 | ||
379 | ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) | |
380 | ||
381 | ifeq ($(ASM_PROTOTYPES),) | |
382 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
383 | ||
384 | else | |
385 | ||
386 | # versioning matches the C process described above, with difference that | |
387 | # we parse asm-prototypes.h C header to get function definitions. | |
388 | ||
389 | cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $< | |
390 | ||
391 | cmd_modversions_S = \ | |
392 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ | |
393 | $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ | |
394 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
395 | \ | |
396 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ | |
397 | -T $(@D)/.tmp_$(@F:.o=.ver); \ | |
398 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ | |
399 | else \ | |
400 | mv -f $(@D)/.tmp_$(@F) $@; \ | |
401 | fi; | |
402 | endif | |
403 | endif | |
1da177e4 | 404 | |
b9ab5ebb JP |
405 | $(obj)/%.o: $(src)/%.S $(objtool_obj) FORCE |
406 | $(call if_changed_rule,as_o_S) | |
1da177e4 LT |
407 | |
408 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) | |
409 | targets += $(extra-y) $(MAKECMDGOALS) $(always) | |
410 | ||
411 | # Linker scripts preprocessor (.lds.S -> .lds) | |
412 | # --------------------------------------------------------------------------- | |
413 | quiet_cmd_cpp_lds_S = LDS $@ | |
51b563fc | 414 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
42f29a25 | 415 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 416 | |
767e581d | 417 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
418 | $(call if_changed_dep,cpp_lds_S) |
419 | ||
4520c6a4 DH |
420 | # ASN.1 grammar |
421 | # --------------------------------------------------------------------------- | |
422 | quiet_cmd_asn1_compiler = ASN.1 $@ | |
423 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ | |
424 | $(subst .h,.c,$@) $(subst .c,.h,$@) | |
425 | ||
426 | .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h | |
427 | ||
428 | $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler | |
429 | $(call cmd,asn1_compiler) | |
430 | ||
1da177e4 LT |
431 | # Build the compiled-in targets |
432 | # --------------------------------------------------------------------------- | |
433 | ||
434 | # To build objects in subdirs, we need to descend into the directories | |
435 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
436 | ||
437 | # | |
438 | # Rule to compile a set of .o files into one .o file | |
439 | # | |
440 | ifdef builtin-target | |
a5967db9 SR |
441 | |
442 | ifdef CONFIG_THIN_ARCHIVES | |
9a6cfca4 NP |
443 | cmd_make_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) |
444 | cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) | |
a5967db9 SR |
445 | quiet_cmd_link_o_target = AR $@ |
446 | else | |
447 | cmd_make_builtin = $(LD) $(ld_flags) -r -o | |
448 | cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) | |
449 | quiet_cmd_link_o_target = LD $@ | |
450 | endif | |
451 | ||
1da177e4 LT |
452 | # If the list of objects to link is empty, just create an empty built-in.o |
453 | cmd_link_o_target = $(if $(strip $(obj-y)),\ | |
a5967db9 | 454 | $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \ |
91341d4b | 455 | $(cmd_secanalysis),\ |
a5967db9 | 456 | $(cmd_make_empty_builtin) $@) |
1da177e4 LT |
457 | |
458 | $(builtin-target): $(obj-y) FORCE | |
459 | $(call if_changed,link_o_target) | |
460 | ||
461 | targets += $(builtin-target) | |
462 | endif # builtin-target | |
463 | ||
551559e1 TH |
464 | # |
465 | # Rule to create modules.order file | |
466 | # | |
467 | # Create commands to either record .ko file or cat modules.order from | |
468 | # a subdirectory | |
469 | modorder-cmds = \ | |
470 | $(foreach m, $(modorder), \ | |
471 | $(if $(filter %/modules.order, $m), \ | |
472 | cat $m;, echo kernel/$m;)) | |
473 | ||
474 | $(modorder-target): $(subdir-ym) FORCE | |
475 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
476 | ||
1da177e4 LT |
477 | # |
478 | # Rule to compile a set of .o files into one .a file | |
479 | # | |
480 | ifdef lib-target | |
481 | quiet_cmd_link_l_target = AR $@ | |
a5967db9 SR |
482 | |
483 | ifdef CONFIG_THIN_ARCHIVES | |
9a6cfca4 | 484 | cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) |
a5967db9 SR |
485 | else |
486 | cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) | |
487 | endif | |
1da177e4 LT |
488 | |
489 | $(lib-target): $(lib-y) FORCE | |
490 | $(call if_changed,link_l_target) | |
491 | ||
492 | targets += $(lib-target) | |
7f2084fa AV |
493 | |
494 | dummy-object = $(obj)/.lib_exports.o | |
495 | ksyms-lds = $(dot-target).lds | |
496 | ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX | |
497 | ref_prefix = EXTERN(_ | |
498 | else | |
499 | ref_prefix = EXTERN( | |
500 | endif | |
501 | ||
502 | quiet_cmd_export_list = EXPORTS $@ | |
503 | cmd_export_list = $(OBJDUMP) -h $< | \ | |
76bee234 | 504 | sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\ |
7f2084fa | 505 | rm -f $(dummy-object);\ |
9da2f584 | 506 | echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ |
7f2084fa AV |
507 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ |
508 | rm $(dummy-object) $(ksyms-lds) | |
509 | ||
510 | $(obj)/lib-ksyms.o: $(lib-target) FORCE | |
511 | $(call if_changed,export_list) | |
989cea5c NP |
512 | |
513 | targets += $(obj)/lib-ksyms.o | |
514 | ||
1da177e4 LT |
515 | endif |
516 | ||
517 | # | |
518 | # Rule to link composite objects | |
519 | # | |
520 | # Composite objects are specified in kbuild makefile as follows: | |
521 | # <composite-object>-objs := <list of .o files> | |
522 | # or | |
523 | # <composite-object>-y := <list of .o files> | |
cf4f2193 MM |
524 | # or |
525 | # <composite-object>-m := <list of .o files> | |
526 | # The -m syntax only works if <composite object> is a module | |
1da177e4 LT |
527 | link_multi_deps = \ |
528 | $(filter $(addprefix $(obj)/, \ | |
529 | $($(subst $(obj)/,,$(@:.o=-objs))) \ | |
cf4f2193 MM |
530 | $($(subst $(obj)/,,$(@:.o=-y))) \ |
531 | $($(subst $(obj)/,,$(@:.o=-m)))), $^) | |
38385f8f | 532 | |
fe026a85 NP |
533 | cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
534 | ||
535 | ifdef CONFIG_THIN_ARCHIVES | |
536 | quiet_cmd_link_multi-y = AR $@ | |
9a6cfca4 | 537 | cmd_link_multi-y = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps) |
fe026a85 NP |
538 | else |
539 | quiet_cmd_link_multi-y = LD $@ | |
540 | cmd_link_multi-y = $(cmd_link_multi-link) | |
541 | endif | |
1da177e4 LT |
542 | |
543 | quiet_cmd_link_multi-m = LD [M] $@ | |
fe026a85 | 544 | cmd_link_multi-m = $(cmd_link_multi-link) |
1da177e4 | 545 | |
c8589d1e | 546 | $(multi-used-y): FORCE |
1da177e4 | 547 | $(call if_changed,link_multi-y) |
c8589d1e | 548 | $(call multi_depend, $(multi-used-y), .o, -objs -y) |
1da177e4 | 549 | |
c8589d1e | 550 | $(multi-used-m): FORCE |
1da177e4 | 551 | $(call if_changed,link_multi-m) |
9895c03d NP |
552 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); \ |
553 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
cf4f2193 | 554 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 LT |
555 | |
556 | targets += $(multi-used-y) $(multi-used-m) | |
557 | ||
558 | ||
559 | # Descending | |
560 | # --------------------------------------------------------------------------- | |
561 | ||
4f193362 | 562 | PHONY += $(subdir-ym) |
1da177e4 LT |
563 | $(subdir-ym): |
564 | $(Q)$(MAKE) $(build)=$@ | |
565 | ||
566 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
567 | # --------------------------------------------------------------------------- | |
568 | ||
4f193362 | 569 | PHONY += FORCE |
1da177e4 LT |
570 | |
571 | FORCE: | |
572 | ||
573 | # Read all saved command lines and dependencies for the $(targets) we | |
574 | # may be building above, using $(if_changed{,_dep}). As an | |
575 | # optimization, we don't need to read them if the target does not | |
576 | # exist, we will rebuild anyway in that case. | |
577 | ||
578 | targets := $(wildcard $(sort $(targets))) | |
579 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
580 | ||
581 | ifneq ($(cmd_files),) | |
582 | include $(cmd_files) | |
583 | endif | |
4f193362 | 584 | |
4f193362 PS |
585 | # Declare the contents of the .PHONY variable as phony. We keep that |
586 | # information in a variable se we can use it in if_changed and friends. | |
587 | ||
588 | .PHONY: $(PHONY) |