]>
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 | |
2ea03891 | 162 | cmd_gensymtypes = \ |
37a8d9f6 | 163 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
d70f82ac JH |
164 | $(GENKSYMS) $(if $(1), -T $(2)) \ |
165 | $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ | |
37a8d9f6 | 166 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 167 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 168 | |
15fde675 | 169 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 SR |
170 | cmd_cc_symtypes_c = \ |
171 | set -e; \ | |
e26d6b83 | 172 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
37a8d9f6 | 173 | test -s $@ || rm -f $@ |
15fde675 | 174 | |
767e581d | 175 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 176 | $(call cmd,cc_symtypes_c) |
15fde675 | 177 | |
1da177e4 LT |
178 | # C (.c) files |
179 | # The C file is compiled and updated dependency information is generated. | |
180 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
181 | ||
182 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
183 | ||
184 | ifndef CONFIG_MODVERSIONS | |
185 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
186 | ||
187 | else | |
188 | # When module versioning is enabled the following steps are executed: | |
2ea03891 SR |
189 | # o compile a .tmp_<file>.o from <file>.c |
190 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does | |
191 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and | |
1da177e4 LT |
192 | # are done. |
193 | # o otherwise, we calculate symbol versions using the good old | |
194 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 SR |
195 | # that they are usable as a linker script |
196 | # o generate <file>.o from .tmp_<file>.o using the linker to | |
197 | # replace the unresolved symbols __crc_exported_symbol with | |
198 | # the actual value of the checksum generated by genksyms | |
1da177e4 | 199 | |
2ea03891 | 200 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
e26d6b83 DZ |
201 | cmd_modversions = \ |
202 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ | |
203 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ | |
204 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
205 | \ | |
206 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ | |
207 | -T $(@D)/.tmp_$(@F:.o=.ver); \ | |
208 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ | |
209 | else \ | |
210 | mv -f $(@D)/.tmp_$(@F) $@; \ | |
1da177e4 LT |
211 | fi; |
212 | endif | |
213 | ||
8da3821b | 214 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
72441cb1 | 215 | ifdef BUILD_C_RECORDMCOUNT |
85356f80 SR |
216 | ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
217 | RECORDMCOUNT_FLAGS = -w | |
218 | endif | |
d7b4d6de SR |
219 | # Due to recursion, we must skip empty.o. |
220 | # The empty.o file is created in the make process in order to determine | |
221 | # the target endianness and word size. It is made before all other C | |
222 | # files, including recordmcount. | |
45677454 WZ |
223 | sub_cmd_record_mcount = \ |
224 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
85356f80 | 225 | $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
45677454 | 226 | fi; |
d6971822 MM |
227 | recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
228 | $(srctree)/scripts/recordmcount.h | |
72441cb1 | 229 | else |
45677454 | 230 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 231 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 232 | "$(if $(CONFIG_64BIT),64,32)" \ |
f9810a82 RV |
233 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
234 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ | |
18c167fd | 235 | "$(if $(part-of-module),1,0)" "$(@)"; |
d6971822 | 236 | recordmcount_source := $(srctree)/scripts/recordmcount.pl |
8da3821b | 237 | endif |
c0a80c0c HC |
238 | cmd_record_mcount = \ |
239 | if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ | |
240 | "$(CC_FLAGS_FTRACE)" ]; then \ | |
45677454 WZ |
241 | $(sub_cmd_record_mcount) \ |
242 | fi; | |
72441cb1 | 243 | endif |
8da3821b | 244 | |
b9ab5ebb | 245 | ifdef CONFIG_STACK_VALIDATION |
3b27a0c8 | 246 | ifneq ($(SKIP_STACK_VALIDATION),1) |
b9ab5ebb JP |
247 | |
248 | __objtool_obj := $(objtree)/tools/objtool/objtool | |
249 | ||
250 | objtool_args = check | |
251 | ifndef CONFIG_FRAME_POINTER | |
252 | objtool_args += --no-fp | |
253 | endif | |
254 | ||
255 | # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory | |
256 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file | |
257 | # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file | |
258 | cmd_objtool = $(if $(patsubst y%,, \ | |
259 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
260 | $(__objtool_obj) $(objtool_args) "$(@)";) | |
261 | objtool_obj = $(if $(patsubst y%,, \ | |
262 | $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ | |
263 | $(__objtool_obj)) | |
264 | ||
3b27a0c8 | 265 | endif # SKIP_STACK_VALIDATION |
b9ab5ebb JP |
266 | endif # CONFIG_STACK_VALIDATION |
267 | ||
1da177e4 | 268 | define rule_cc_o_c |
6176aa9a | 269 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
e4aca459 | 270 | $(call cmd_and_fixdep,cc_o_c) \ |
1da177e4 | 271 | $(cmd_modversions) \ |
e4aca459 NP |
272 | $(cmd_objtool) \ |
273 | $(call echo-cmd,record_mcount) $(cmd_record_mcount) | |
1da177e4 LT |
274 | endef |
275 | ||
b9ab5ebb | 276 | define rule_as_o_S |
e4aca459 NP |
277 | $(call cmd_and_fixdep,as_o_S) \ |
278 | $(cmd_objtool) | |
b9ab5ebb JP |
279 | endef |
280 | ||
9895c03d NP |
281 | # List module undefined symbols (or empty line if not enabled) |
282 | ifdef CONFIG_TRIM_UNUSED_KSYMS | |
283 | cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo | |
284 | else | |
285 | cmd_undef_syms = echo | |
286 | endif | |
287 | ||
1da177e4 | 288 | # Built-in and composite module parts |
b9ab5ebb | 289 | $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
1da177e4 LT |
290 | $(call cmd,force_checksrc) |
291 | $(call if_changed_rule,cc_o_c) | |
292 | ||
293 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
294 | ||
b9ab5ebb | 295 | $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE |
1da177e4 LT |
296 | $(call cmd,force_checksrc) |
297 | $(call if_changed_rule,cc_o_c) | |
9895c03d NP |
298 | @{ echo $(@:.o=.ko); echo $@; \ |
299 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
1da177e4 LT |
300 | |
301 | quiet_cmd_cc_lst_c = MKLST $@ | |
302 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
303 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
304 | System.map $(OBJDUMP) > $@ | |
305 | ||
767e581d | 306 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
307 | $(call if_changed_dep,cc_lst_c) |
308 | ||
309 | # Compile assembler sources (.S) | |
310 | # --------------------------------------------------------------------------- | |
311 | ||
80c00ba9 | 312 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
1da177e4 | 313 | |
6588169d SR |
314 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
315 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
1da177e4 | 316 | |
e0f41e52 MY |
317 | quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ |
318 | cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< | |
1da177e4 | 319 | |
767e581d | 320 | $(obj)/%.s: $(src)/%.S FORCE |
e0f41e52 | 321 | $(call if_changed_dep,cpp_s_S) |
1da177e4 LT |
322 | |
323 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
324 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
325 | ||
b9ab5ebb JP |
326 | $(obj)/%.o: $(src)/%.S $(objtool_obj) FORCE |
327 | $(call if_changed_rule,as_o_S) | |
1da177e4 LT |
328 | |
329 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) | |
330 | targets += $(extra-y) $(MAKECMDGOALS) $(always) | |
331 | ||
332 | # Linker scripts preprocessor (.lds.S -> .lds) | |
333 | # --------------------------------------------------------------------------- | |
334 | quiet_cmd_cpp_lds_S = LDS $@ | |
51b563fc | 335 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
42f29a25 | 336 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 337 | |
767e581d | 338 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
339 | $(call if_changed_dep,cpp_lds_S) |
340 | ||
4520c6a4 DH |
341 | # ASN.1 grammar |
342 | # --------------------------------------------------------------------------- | |
343 | quiet_cmd_asn1_compiler = ASN.1 $@ | |
344 | cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ | |
345 | $(subst .h,.c,$@) $(subst .c,.h,$@) | |
346 | ||
347 | .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h | |
348 | ||
349 | $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler | |
350 | $(call cmd,asn1_compiler) | |
351 | ||
1da177e4 LT |
352 | # Build the compiled-in targets |
353 | # --------------------------------------------------------------------------- | |
354 | ||
355 | # To build objects in subdirs, we need to descend into the directories | |
356 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
357 | ||
358 | # | |
359 | # Rule to compile a set of .o files into one .o file | |
360 | # | |
361 | ifdef builtin-target | |
a5967db9 SR |
362 | |
363 | ifdef CONFIG_THIN_ARCHIVES | |
364 | cmd_make_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) | |
365 | cmd_make_empty_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) | |
366 | quiet_cmd_link_o_target = AR $@ | |
367 | else | |
368 | cmd_make_builtin = $(LD) $(ld_flags) -r -o | |
369 | cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) | |
370 | quiet_cmd_link_o_target = LD $@ | |
371 | endif | |
372 | ||
1da177e4 LT |
373 | # If the list of objects to link is empty, just create an empty built-in.o |
374 | cmd_link_o_target = $(if $(strip $(obj-y)),\ | |
a5967db9 | 375 | $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \ |
91341d4b | 376 | $(cmd_secanalysis),\ |
a5967db9 | 377 | $(cmd_make_empty_builtin) $@) |
1da177e4 LT |
378 | |
379 | $(builtin-target): $(obj-y) FORCE | |
380 | $(call if_changed,link_o_target) | |
381 | ||
382 | targets += $(builtin-target) | |
383 | endif # builtin-target | |
384 | ||
551559e1 TH |
385 | # |
386 | # Rule to create modules.order file | |
387 | # | |
388 | # Create commands to either record .ko file or cat modules.order from | |
389 | # a subdirectory | |
390 | modorder-cmds = \ | |
391 | $(foreach m, $(modorder), \ | |
392 | $(if $(filter %/modules.order, $m), \ | |
393 | cat $m;, echo kernel/$m;)) | |
394 | ||
395 | $(modorder-target): $(subdir-ym) FORCE | |
396 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
397 | ||
1da177e4 LT |
398 | # |
399 | # Rule to compile a set of .o files into one .a file | |
400 | # | |
401 | ifdef lib-target | |
402 | quiet_cmd_link_l_target = AR $@ | |
a5967db9 SR |
403 | |
404 | ifdef CONFIG_THIN_ARCHIVES | |
405 | cmd_link_l_target = rm -f $@; $(AR) rcsT$(KBUILD_ARFLAGS) $@ $(lib-y) | |
406 | else | |
407 | cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) | |
408 | endif | |
1da177e4 LT |
409 | |
410 | $(lib-target): $(lib-y) FORCE | |
411 | $(call if_changed,link_l_target) | |
412 | ||
413 | targets += $(lib-target) | |
7f2084fa AV |
414 | |
415 | dummy-object = $(obj)/.lib_exports.o | |
416 | ksyms-lds = $(dot-target).lds | |
417 | ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX | |
418 | ref_prefix = EXTERN(_ | |
419 | else | |
420 | ref_prefix = EXTERN( | |
421 | endif | |
422 | ||
423 | quiet_cmd_export_list = EXPORTS $@ | |
424 | cmd_export_list = $(OBJDUMP) -h $< | \ | |
425 | sed -ne '/___ksymtab/{s/.*+/$(ref_prefix)/;s/ .*/)/;p}' >$(ksyms-lds);\ | |
426 | rm -f $(dummy-object);\ | |
427 | $(AR) rcs$(KBUILD_ARFLAGS) $(dummy-object);\ | |
428 | $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ | |
429 | rm $(dummy-object) $(ksyms-lds) | |
430 | ||
431 | $(obj)/lib-ksyms.o: $(lib-target) FORCE | |
432 | $(call if_changed,export_list) | |
1da177e4 LT |
433 | endif |
434 | ||
435 | # | |
436 | # Rule to link composite objects | |
437 | # | |
438 | # Composite objects are specified in kbuild makefile as follows: | |
439 | # <composite-object>-objs := <list of .o files> | |
440 | # or | |
441 | # <composite-object>-y := <list of .o files> | |
cf4f2193 MM |
442 | # or |
443 | # <composite-object>-m := <list of .o files> | |
444 | # The -m syntax only works if <composite object> is a module | |
1da177e4 LT |
445 | link_multi_deps = \ |
446 | $(filter $(addprefix $(obj)/, \ | |
447 | $($(subst $(obj)/,,$(@:.o=-objs))) \ | |
cf4f2193 MM |
448 | $($(subst $(obj)/,,$(@:.o=-y))) \ |
449 | $($(subst $(obj)/,,$(@:.o=-m)))), $^) | |
38385f8f | 450 | |
fe026a85 NP |
451 | cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
452 | ||
453 | ifdef CONFIG_THIN_ARCHIVES | |
454 | quiet_cmd_link_multi-y = AR $@ | |
455 | cmd_link_multi-y = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) $@ $(link_multi_deps) | |
456 | else | |
457 | quiet_cmd_link_multi-y = LD $@ | |
458 | cmd_link_multi-y = $(cmd_link_multi-link) | |
459 | endif | |
1da177e4 LT |
460 | |
461 | quiet_cmd_link_multi-m = LD [M] $@ | |
fe026a85 | 462 | cmd_link_multi-m = $(cmd_link_multi-link) |
1da177e4 | 463 | |
c8589d1e | 464 | $(multi-used-y): FORCE |
1da177e4 | 465 | $(call if_changed,link_multi-y) |
c8589d1e | 466 | $(call multi_depend, $(multi-used-y), .o, -objs -y) |
1da177e4 | 467 | |
c8589d1e | 468 | $(multi-used-m): FORCE |
1da177e4 | 469 | $(call if_changed,link_multi-m) |
9895c03d NP |
470 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); \ |
471 | $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) | |
cf4f2193 | 472 | $(call multi_depend, $(multi-used-m), .o, -objs -y -m) |
1da177e4 LT |
473 | |
474 | targets += $(multi-used-y) $(multi-used-m) | |
475 | ||
476 | ||
477 | # Descending | |
478 | # --------------------------------------------------------------------------- | |
479 | ||
4f193362 | 480 | PHONY += $(subdir-ym) |
1da177e4 LT |
481 | $(subdir-ym): |
482 | $(Q)$(MAKE) $(build)=$@ | |
483 | ||
484 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
485 | # --------------------------------------------------------------------------- | |
486 | ||
4f193362 | 487 | PHONY += FORCE |
1da177e4 LT |
488 | |
489 | FORCE: | |
490 | ||
491 | # Read all saved command lines and dependencies for the $(targets) we | |
492 | # may be building above, using $(if_changed{,_dep}). As an | |
493 | # optimization, we don't need to read them if the target does not | |
494 | # exist, we will rebuild anyway in that case. | |
495 | ||
496 | targets := $(wildcard $(sort $(targets))) | |
497 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
498 | ||
499 | ifneq ($(cmd_files),) | |
500 | include $(cmd_files) | |
501 | endif | |
4f193362 | 502 | |
4f193362 PS |
503 | # Declare the contents of the .PHONY variable as phony. We keep that |
504 | # information in a variable se we can use it in if_changed and friends. | |
505 | ||
506 | .PHONY: $(PHONY) |