]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - scripts/Makefile.build
powerpc: Add new cache geometry aux vectors
[karo-tx-linux.git] / scripts / Makefile.build
1 # ==========================================================================
2 # Building
3 # ==========================================================================
4
5 src := $(obj)
6
7 PHONY := __build
8 __build:
9
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  :=
25 asflags-y  :=
26 ccflags-y  :=
27 cppflags-y :=
28 ldflags-y  :=
29
30 subdir-asflags-y :=
31 subdir-ccflags-y :=
32
33 # Read auto.conf if it exists, otherwise ignore
34 -include include/config/auto.conf
35
36 include scripts/Kbuild.include
37
38 # For backward compatibility check that these variables do not change
39 save-cflags := $(CFLAGS)
40
41 # The filename Kbuild has precedence over Makefile
42 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
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)")
49                 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
50         endif
51 endif
52
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 += $(host-progs)
59 endif
60 endif
61
62 # Do not include host rules unless needed
63 ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
64 include scripts/Makefile.host
65 endif
66
67 ifneq ($(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
76 ifndef obj
77 $(warning kbuild: Makefile.build is included improperly)
78 endif
79
80 # ===========================================================================
81
82 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
83 lib-target := $(obj)/lib.a
84 obj-y += $(obj)/lib-ksyms.o
85 endif
86
87 ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
88 builtin-target := $(obj)/built-in.o
89 endif
90
91 modorder-target := $(obj)/modules.order
92
93 # We keep a list of all modules in $(MODVERDIR)
94
95 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
96          $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
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
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
115
116 # Compile C sources (.c)
117 # ---------------------------------------------------------------------------
118
119 # Default is built-in, unless we know otherwise
120 modkern_cflags =                                          \
121         $(if $(part-of-module),                           \
122                 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
123                 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
124 quiet_modtag := $(empty)   $(empty)
125
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
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
139 modname = $(basetarget)
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)  $@
151 cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
152
153 $(obj)/%.s: $(src)/%.c FORCE
154         $(call if_changed_dep,cc_s_c)
155
156 quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
157 cmd_cpp_i_c       = $(CPP) $(c_flags) -o $@ $<
158
159 $(obj)/%.i: $(src)/%.c FORCE
160         $(call if_changed_dep,cpp_i_c)
161
162 # These mirror gensymtypes_S and co below, keep them in synch.
163 cmd_gensymtypes_c =                                                         \
164     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
165     $(GENKSYMS) $(if $(1), -T $(2))                                         \
166      $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))             \
167      $(if $(KBUILD_PRESERVE),-p)                                            \
168      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
169
170 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
171 cmd_cc_symtypes_c =                                                         \
172     set -e;                                                                 \
173     $(call cmd_gensymtypes_c,true,$@) >/dev/null;                           \
174     test -s $@ || rm -f $@
175
176 $(obj)/%.symtypes : $(src)/%.c FORCE
177         $(call cmd,cc_symtypes_c)
178
179 # C (.c) files
180 # The C file is compiled and updated dependency information is generated.
181 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
182
183 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
184
185 ifndef CONFIG_MODVERSIONS
186 cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
187
188 else
189 # When module versioning is enabled the following steps are executed:
190 # o compile a .tmp_<file>.o from <file>.c
191 # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
192 #   not export symbols, we just rename .tmp_<file>.o to <file>.o and
193 #   are done.
194 # o otherwise, we calculate symbol versions using the good old
195 #   genksyms on the preprocessed source and postprocess them in a way
196 #   that they are usable as a linker script
197 # o generate <file>.o from .tmp_<file>.o using the linker to
198 #   replace the unresolved symbols __crc_exported_symbol with
199 #   the actual value of the checksum generated by genksyms
200
201 cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
202
203 cmd_modversions_c =                                                             \
204         if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then             \
205                 $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))  \
206                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
207                                                                                 \
208                 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)                      \
209                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
210                 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);                \
211         else                                                                    \
212                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
213         fi;
214 endif
215
216 ifdef CONFIG_FTRACE_MCOUNT_RECORD
217 ifdef BUILD_C_RECORDMCOUNT
218 ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
219   RECORDMCOUNT_FLAGS = -w
220 endif
221 # Due to recursion, we must skip empty.o.
222 # The empty.o file is created in the make process in order to determine
223 #  the target endianness and word size. It is made before all other C
224 #  files, including recordmcount.
225 sub_cmd_record_mcount =                                 \
226         if [ $(@) != "scripts/mod/empty.o" ]; then      \
227                 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
228         fi;
229 recordmcount_source := $(srctree)/scripts/recordmcount.c \
230                     $(srctree)/scripts/recordmcount.h
231 else
232 sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
233         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
234         "$(if $(CONFIG_64BIT),64,32)" \
235         "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
236         "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
237         "$(if $(part-of-module),1,0)" "$(@)";
238 recordmcount_source := $(srctree)/scripts/recordmcount.pl
239 endif
240 cmd_record_mcount =                                             \
241         if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" =   \
242              "$(CC_FLAGS_FTRACE)" ]; then                       \
243                 $(sub_cmd_record_mcount)                        \
244         fi;
245 endif
246
247 ifdef CONFIG_STACK_VALIDATION
248 ifneq ($(SKIP_STACK_VALIDATION),1)
249
250 __objtool_obj := $(objtree)/tools/objtool/objtool
251
252 objtool_args = check
253 ifndef CONFIG_FRAME_POINTER
254 objtool_args += --no-fp
255 endif
256
257 # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
258 # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
259 # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
260 cmd_objtool = $(if $(patsubst y%,, \
261         $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
262         $(__objtool_obj) $(objtool_args) "$(@)";)
263 objtool_obj = $(if $(patsubst y%,, \
264         $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
265         $(__objtool_obj))
266
267 endif # SKIP_STACK_VALIDATION
268 endif # CONFIG_STACK_VALIDATION
269
270 define rule_cc_o_c
271         $(call echo-cmd,checksrc) $(cmd_checksrc)                         \
272         $(call cmd_and_fixdep,cc_o_c)                                     \
273         $(cmd_modversions_c)                                              \
274         $(cmd_objtool)                                                    \
275         $(call echo-cmd,record_mcount) $(cmd_record_mcount)
276 endef
277
278 define rule_as_o_S
279         $(call cmd_and_fixdep,as_o_S)                                     \
280         $(cmd_modversions_S)                                              \
281         $(cmd_objtool)
282 endef
283
284 # List module undefined symbols (or empty line if not enabled)
285 ifdef CONFIG_TRIM_UNUSED_KSYMS
286 cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo
287 else
288 cmd_undef_syms = echo
289 endif
290
291 # Built-in and composite module parts
292 $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE
293         $(call cmd,force_checksrc)
294         $(call if_changed_rule,cc_o_c)
295
296 # Single-part modules are special since we need to mark them in $(MODVERDIR)
297
298 $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_obj) FORCE
299         $(call cmd,force_checksrc)
300         $(call if_changed_rule,cc_o_c)
301         @{ echo $(@:.o=.ko); echo $@; \
302            $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
303
304 quiet_cmd_cc_lst_c = MKLST   $@
305       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
306                      $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
307                                      System.map $(OBJDUMP) > $@
308
309 $(obj)/%.lst: $(src)/%.c FORCE
310         $(call if_changed_dep,cc_lst_c)
311
312 # Compile assembler sources (.S)
313 # ---------------------------------------------------------------------------
314
315 modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
316
317 $(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
318 $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
319
320 # .S file exports must have their C prototypes defined in asm/asm-prototypes.h
321 # or a file that it includes, in order to get versioned symbols. We build a
322 # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
323 # the .S file (with trailing ';'), and run genksyms on that, to extract vers.
324 #
325 # This is convoluted. The .S file must first be preprocessed to run guards and
326 # expand names, then the resulting exports must be constructed into plain
327 # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
328 # to make the genksyms input.
329 #
330 # These mirror gensymtypes_c and co above, keep them in synch.
331 cmd_gensymtypes_S =                                                         \
332     (echo "\#include <linux/kernel.h>" ;                                    \
333      echo "\#include <asm/asm-prototypes.h>" ;                              \
334     $(CPP) $(a_flags) $< |                                                  \
335      grep "\<___EXPORT_SYMBOL\>" |                                          \
336      sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \
337     $(CPP) -D__GENKSYMS__ $(c_flags) -xc - |                                \
338     $(GENKSYMS) $(if $(1), -T $(2))                                         \
339      $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))             \
340      $(if $(KBUILD_PRESERVE),-p)                                            \
341      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
342
343 quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
344 cmd_cc_symtypes_S =                                                         \
345     set -e;                                                                 \
346     $(call cmd_gensymtypes_S,true,$@) >/dev/null;                           \
347     test -s $@ || rm -f $@
348
349 $(obj)/%.symtypes : $(src)/%.S FORCE
350         $(call cmd,cc_symtypes_S)
351
352
353 quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
354 cmd_cpp_s_S       = $(CPP) $(a_flags) -o $@ $<
355
356 $(obj)/%.s: $(src)/%.S FORCE
357         $(call if_changed_dep,cpp_s_S)
358
359 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
360
361 ifndef CONFIG_MODVERSIONS
362 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
363
364 else
365
366 ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)
367
368 ifeq ($(ASM_PROTOTYPES),)
369 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
370
371 else
372
373 # versioning matches the C process described above, with difference that
374 # we parse asm-prototypes.h C header to get function definitions.
375
376 cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $<
377
378 cmd_modversions_S =                                                             \
379         if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then             \
380                 $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))  \
381                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
382                                                                                 \
383                 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F)                      \
384                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
385                 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);                \
386         else                                                                    \
387                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
388         fi;
389 endif
390 endif
391
392 $(obj)/%.o: $(src)/%.S $(objtool_obj) FORCE
393         $(call if_changed_rule,as_o_S)
394
395 targets += $(real-objs-y) $(real-objs-m) $(lib-y)
396 targets += $(extra-y) $(MAKECMDGOALS) $(always)
397
398 # Linker scripts preprocessor (.lds.S -> .lds)
399 # ---------------------------------------------------------------------------
400 quiet_cmd_cpp_lds_S = LDS     $@
401       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
402                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
403
404 $(obj)/%.lds: $(src)/%.lds.S FORCE
405         $(call if_changed_dep,cpp_lds_S)
406
407 # ASN.1 grammar
408 # ---------------------------------------------------------------------------
409 quiet_cmd_asn1_compiler = ASN.1   $@
410       cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
411                                 $(subst .h,.c,$@) $(subst .c,.h,$@)
412
413 .PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
414
415 $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
416         $(call cmd,asn1_compiler)
417
418 # Build the compiled-in targets
419 # ---------------------------------------------------------------------------
420
421 # To build objects in subdirs, we need to descend into the directories
422 $(sort $(subdir-obj-y)): $(subdir-ym) ;
423
424 #
425 # Rule to compile a set of .o files into one .o file
426 #
427 ifdef builtin-target
428
429 ifdef CONFIG_THIN_ARCHIVES
430   cmd_make_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS)
431   cmd_make_empty_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS)
432   quiet_cmd_link_o_target = AR      $@
433 else
434   cmd_make_builtin = $(LD) $(ld_flags) -r -o
435   cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS)
436   quiet_cmd_link_o_target = LD      $@
437 endif
438
439 # If the list of objects to link is empty, just create an empty built-in.o
440 cmd_link_o_target = $(if $(strip $(obj-y)),\
441                       $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \
442                       $(cmd_secanalysis),\
443                       $(cmd_make_empty_builtin) $@)
444
445 $(builtin-target): $(obj-y) FORCE
446         $(call if_changed,link_o_target)
447
448 targets += $(builtin-target)
449 endif # builtin-target
450
451 #
452 # Rule to create modules.order file
453 #
454 # Create commands to either record .ko file or cat modules.order from
455 # a subdirectory
456 modorder-cmds =                                         \
457         $(foreach m, $(modorder),                       \
458                 $(if $(filter %/modules.order, $m),     \
459                         cat $m;, echo kernel/$m;))
460
461 $(modorder-target): $(subdir-ym) FORCE
462         $(Q)(cat /dev/null; $(modorder-cmds)) > $@
463
464 #
465 # Rule to compile a set of .o files into one .a file
466 #
467 ifdef lib-target
468 quiet_cmd_link_l_target = AR      $@
469
470 ifdef CONFIG_THIN_ARCHIVES
471   cmd_link_l_target = rm -f $@; $(AR) rcsT$(KBUILD_ARFLAGS) $@ $(lib-y)
472 else
473   cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
474 endif
475
476 $(lib-target): $(lib-y) FORCE
477         $(call if_changed,link_l_target)
478
479 targets += $(lib-target)
480
481 dummy-object = $(obj)/.lib_exports.o
482 ksyms-lds = $(dot-target).lds
483 ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
484 ref_prefix = EXTERN(_
485 else
486 ref_prefix = EXTERN(
487 endif
488
489 quiet_cmd_export_list = EXPORTS $@
490 cmd_export_list = $(OBJDUMP) -h $< | \
491         sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\
492         rm -f $(dummy-object);\
493         echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
494         $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
495         rm $(dummy-object) $(ksyms-lds)
496
497 $(obj)/lib-ksyms.o: $(lib-target) FORCE
498         $(call if_changed,export_list)
499
500 targets += $(obj)/lib-ksyms.o
501
502 endif
503
504 #
505 # Rule to link composite objects
506 #
507 #  Composite objects are specified in kbuild makefile as follows:
508 #    <composite-object>-objs := <list of .o files>
509 #  or
510 #    <composite-object>-y    := <list of .o files>
511 #  or
512 #    <composite-object>-m    := <list of .o files>
513 #  The -m syntax only works if <composite object> is a module
514 link_multi_deps =                     \
515 $(filter $(addprefix $(obj)/,         \
516 $($(subst $(obj)/,,$(@:.o=-objs)))    \
517 $($(subst $(obj)/,,$(@:.o=-y)))       \
518 $($(subst $(obj)/,,$(@:.o=-m)))), $^)
519
520 cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
521
522 ifdef CONFIG_THIN_ARCHIVES
523   quiet_cmd_link_multi-y = AR      $@
524   cmd_link_multi-y = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
525 else
526   quiet_cmd_link_multi-y = LD      $@
527   cmd_link_multi-y = $(cmd_link_multi-link)
528 endif
529
530 quiet_cmd_link_multi-m = LD [M]  $@
531 cmd_link_multi-m = $(cmd_link_multi-link)
532
533 $(multi-used-y): FORCE
534         $(call if_changed,link_multi-y)
535 $(call multi_depend, $(multi-used-y), .o, -objs -y)
536
537 $(multi-used-m): FORCE
538         $(call if_changed,link_multi-m)
539         @{ echo $(@:.o=.ko); echo $(link_multi_deps); \
540            $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
541 $(call multi_depend, $(multi-used-m), .o, -objs -y -m)
542
543 targets += $(multi-used-y) $(multi-used-m)
544
545
546 # Descending
547 # ---------------------------------------------------------------------------
548
549 PHONY += $(subdir-ym)
550 $(subdir-ym):
551         $(Q)$(MAKE) $(build)=$@
552
553 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
554 # ---------------------------------------------------------------------------
555
556 PHONY += FORCE
557
558 FORCE:
559
560 # Read all saved command lines and dependencies for the $(targets) we
561 # may be building above, using $(if_changed{,_dep}). As an
562 # optimization, we don't need to read them if the target does not
563 # exist, we will rebuild anyway in that case.
564
565 targets := $(wildcard $(sort $(targets)))
566 cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
567
568 ifneq ($(cmd_files),)
569   include $(cmd_files)
570 endif
571
572 # Declare the contents of the .PHONY variable as phony.  We keep that
573 # information in a variable se we can use it in if_changed and friends.
574
575 .PHONY: $(PHONY)