Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# ==========================================================================
2# Building
3# ==========================================================================
4
5src := $(obj)
6
7PHONY := __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
13obj-y :=
14obj-m :=
15lib-y :=
16lib-m :=
17always :=
18targets :=
19subdir-y :=
20subdir-m :=
21EXTRA_AFLAGS :=
22EXTRA_CFLAGS :=
23EXTRA_CPPFLAGS :=
24EXTRA_LDFLAGS :=
25asflags-y :=
26ccflags-y :=
27cppflags-y :=
28ldflags-y :=
29
30subdir-asflags-y :=
31subdir-ccflags-y :=
32
33# Read auto.conf if it exists, otherwise ignore
34-include include/config/auto.conf
35
36include scripts/Kbuild.include
37
38# For backward compatibility check that these variables do not change
39save-cflags := $(CFLAGS)
40
41# The filename Kbuild has precedence over Makefile
42kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
43kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
44include $(kbuild-file)
45
46# If the save-* variables changed error out
47ifeq ($(KBUILD_NOPEDANTIC),)
48 ifneq ("$(save-cflags)","$(CFLAGS)")
49 $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
50 endif
51endif
52
53include scripts/Makefile.lib
54
55ifdef host-progs
56ifneq ($(hostprogs-y),$(host-progs))
57$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
58hostprogs-y += $(host-progs)
59endif
60endif
61
62# Do not include host rules unless needed
63ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
64include scripts/Makefile.host
65endif
66
67ifneq ($(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 $(d)))
74endif
75
76ifndef obj
77$(warning kbuild: Makefile.build is included improperly)
78endif
79
80# ===========================================================================
81
82ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
83lib-target := $(obj)/lib.a
84obj-y += $(obj)/lib-ksyms.o
85endif
86
87ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
88builtin-target := $(obj)/built-in.o
89endif
90
91modorder-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) $(always)
98 @:
99
100# Linus' kernel sanity checking tool
101ifneq ($(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
109endif
110
111# Do section mismatch analysis for each module/built-in.o
112ifdef CONFIG_DEBUG_SECTION_MISMATCH
113 cmd_secanalysis = ; scripts/mod/modpost $@
114endif
115
116# Compile C sources (.c)
117# ---------------------------------------------------------------------------
118
119# Default is built-in, unless we know otherwise
120modkern_cflags = \
121 $(if $(part-of-module), \
122 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
123 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
124quiet_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
139modname = $(basetarget)
140
141$(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
150quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
151cmd_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
156quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
157cmd_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.
163cmd_gensymtypes_c = \
164 $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
165 $(GENKSYMS) $(if $(1), -T $(2)) \
166 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
167 $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \
168 $(if $(KBUILD_PRESERVE),-p) \
169 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
170
171quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
172cmd_cc_symtypes_c = \
173 set -e; \
174 $(call cmd_gensymtypes_c,true,$@) >/dev/null; \
175 test -s $@ || rm -f $@
176
177$(obj)/%.symtypes : $(src)/%.c FORCE
178 $(call cmd,cc_symtypes_c)
179
180# LLVM assembly
181# Generate .ll files from .c
182quiet_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
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
192quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
193
194ifndef CONFIG_MODVERSIONS
195cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
196
197else
198# When module versioning is enabled the following steps are executed:
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
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
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
209
210cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
211
212cmd_modversions_c = \
213 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
214 $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
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) $@; \
222 fi;
223endif
224
225ifdef CONFIG_FTRACE_MCOUNT_RECORD
226ifdef BUILD_C_RECORDMCOUNT
227ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
228 RECORDMCOUNT_FLAGS = -w
229endif
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.
234sub_cmd_record_mcount = \
235 if [ $(@) != "scripts/mod/empty.o" ]; then \
236 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
237 fi;
238recordmcount_source := $(srctree)/scripts/recordmcount.c \
239 $(srctree)/scripts/recordmcount.h
240else
241sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
242 "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
243 "$(if $(CONFIG_64BIT),64,32)" \
244 "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
245 "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
246 "$(if $(part-of-module),1,0)" "$(@)";
247recordmcount_source := $(srctree)/scripts/recordmcount.pl
248endif # BUILD_C_RECORDMCOUNT
249cmd_record_mcount = \
250 if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
251 "$(CC_FLAGS_FTRACE)" ]; then \
252 $(sub_cmd_record_mcount) \
253 fi;
254endif # CONFIG_FTRACE_MCOUNT_RECORD
255
256ifdef CONFIG_STACK_VALIDATION
257ifneq ($(SKIP_STACK_VALIDATION),1)
258
259__objtool_obj := $(objtree)/tools/objtool/objtool
260
261objtool_args = $(if $(CONFIG_ORC_UNWINDER),orc generate,check)
262
263ifndef CONFIG_FRAME_POINTER
264objtool_args += --no-fp
265endif
266ifdef CONFIG_GCOV_KERNEL
267objtool_args += --no-unreachable
268else
269objtool_args += $(call cc-ifversion, -lt, 0405, --no-unreachable)
270endif
271
272# 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
273# 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
274# 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
275cmd_objtool = $(if $(patsubst y%,, \
276 $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
277 $(__objtool_obj) $(objtool_args) "$(@)";)
278objtool_obj = $(if $(patsubst y%,, \
279 $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
280 $(__objtool_obj))
281
282endif # SKIP_STACK_VALIDATION
283endif # CONFIG_STACK_VALIDATION
284
285# Rebuild all objects when objtool changes, or is enabled/disabled.
286objtool_dep = $(objtool_obj) \
287 $(wildcard include/config/orc/unwinder.h \
288 include/config/stack/validation.h)
289
290define rule_cc_o_c
291 $(call echo-cmd,checksrc) $(cmd_checksrc) \
292 $(call cmd_and_fixdep,cc_o_c) \
293 $(cmd_modversions_c) \
294 $(call echo-cmd,objtool) $(cmd_objtool) \
295 $(call echo-cmd,record_mcount) $(cmd_record_mcount)
296endef
297
298define rule_as_o_S
299 $(call cmd_and_fixdep,as_o_S) \
300 $(cmd_modversions_S) \
301 $(call echo-cmd,objtool) $(cmd_objtool)
302endef
303
304# List module undefined symbols (or empty line if not enabled)
305ifdef CONFIG_TRIM_UNUSED_KSYMS
306cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo
307else
308cmd_undef_syms = echo
309endif
310
311# Built-in and composite module parts
312$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
313 $(call cmd,force_checksrc)
314 $(call if_changed_rule,cc_o_c)
315
316# Single-part modules are special since we need to mark them in $(MODVERDIR)
317
318$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
319 $(call cmd,force_checksrc)
320 $(call if_changed_rule,cc_o_c)
321 @{ echo $(@:.o=.ko); echo $@; \
322 $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
323
324quiet_cmd_cc_lst_c = MKLST $@
325 cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
326 $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
327 System.map $(OBJDUMP) > $@
328
329$(obj)/%.lst: $(src)/%.c FORCE
330 $(call if_changed_dep,cc_lst_c)
331
332# Compile assembler sources (.S)
333# ---------------------------------------------------------------------------
334
335modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
336
337$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
338$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
339
340# .S file exports must have their C prototypes defined in asm/asm-prototypes.h
341# or a file that it includes, in order to get versioned symbols. We build a
342# dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
343# the .S file (with trailing ';'), and run genksyms on that, to extract vers.
344#
345# This is convoluted. The .S file must first be preprocessed to run guards and
346# expand names, then the resulting exports must be constructed into plain
347# EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
348# to make the genksyms input.
349#
350# These mirror gensymtypes_c and co above, keep them in synch.
351cmd_gensymtypes_S = \
352 (echo "\#include <linux/kernel.h>" ; \
353 echo "\#include <asm/asm-prototypes.h>" ; \
354 $(CPP) $(a_flags) $< | \
355 grep "\<___EXPORT_SYMBOL\>" | \
356 sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \
357 $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \
358 $(GENKSYMS) $(if $(1), -T $(2)) \
359 $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
360 $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \
361 $(if $(KBUILD_PRESERVE),-p) \
362 -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
363
364quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
365cmd_cc_symtypes_S = \
366 set -e; \
367 $(call cmd_gensymtypes_S,true,$@) >/dev/null; \
368 test -s $@ || rm -f $@
369
370$(obj)/%.symtypes : $(src)/%.S FORCE
371 $(call cmd,cc_symtypes_S)
372
373
374quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
375cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $<
376
377$(obj)/%.s: $(src)/%.S FORCE
378 $(call if_changed_dep,cpp_s_S)
379
380quiet_cmd_as_o_S = AS $(quiet_modtag) $@
381
382ifndef CONFIG_MODVERSIONS
383cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
384
385else
386
387ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)
388
389ifeq ($(ASM_PROTOTYPES),)
390cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
391
392else
393
394# versioning matches the C process described above, with difference that
395# we parse asm-prototypes.h C header to get function definitions.
396
397cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $<
398
399cmd_modversions_S = \
400 if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
401 $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
402 > $(@D)/.tmp_$(@F:.o=.ver); \
403 \
404 $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
405 -T $(@D)/.tmp_$(@F:.o=.ver); \
406 rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
407 else \
408 mv -f $(@D)/.tmp_$(@F) $@; \
409 fi;
410endif
411endif
412
413$(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
414 $(call if_changed_rule,as_o_S)
415
416targets += $(real-objs-y) $(real-objs-m) $(lib-y)
417targets += $(extra-y) $(MAKECMDGOALS) $(always)
418
419# Linker scripts preprocessor (.lds.S -> .lds)
420# ---------------------------------------------------------------------------
421quiet_cmd_cpp_lds_S = LDS $@
422 cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
423 -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
424
425$(obj)/%.lds: $(src)/%.lds.S FORCE
426 $(call if_changed_dep,cpp_lds_S)
427
428# ASN.1 grammar
429# ---------------------------------------------------------------------------
430quiet_cmd_asn1_compiler = ASN.1 $@
431 cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
432 $(subst .h,.c,$@) $(subst .c,.h,$@)
433
434.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
435
436$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
437 $(call cmd,asn1_compiler)
438
439# Build the compiled-in targets
440# ---------------------------------------------------------------------------
441
442# To build objects in subdirs, we need to descend into the directories
443$(sort $(subdir-obj-y)): $(subdir-ym) ;
444
445#
446# Rule to compile a set of .o files into one .o file
447#
448ifdef builtin-target
449
450ifdef CONFIG_THIN_ARCHIVES
451 cmd_make_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
452 cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
453 quiet_cmd_link_o_target = AR $@
454else
455 cmd_make_builtin = $(LD) $(ld_flags) -r -o
456 cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS)
457 quiet_cmd_link_o_target = LD $@
458endif
459
460# If the list of objects to link is empty, just create an empty built-in.o
461cmd_link_o_target = $(if $(strip $(obj-y)),\
462 $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \
463 $(cmd_secanalysis),\
464 $(cmd_make_empty_builtin) $@)
465
466$(builtin-target): $(obj-y) FORCE
467 $(call if_changed,link_o_target)
468
469targets += $(builtin-target)
470endif # builtin-target
471
472#
473# Rule to create modules.order file
474#
475# Create commands to either record .ko file or cat modules.order from
476# a subdirectory
477modorder-cmds = \
478 $(foreach m, $(modorder), \
479 $(if $(filter %/modules.order, $m), \
480 cat $m;, echo kernel/$m;))
481
482$(modorder-target): $(subdir-ym) FORCE
483 $(Q)(cat /dev/null; $(modorder-cmds)) > $@
484
485#
486# Rule to compile a set of .o files into one .a file
487#
488ifdef lib-target
489quiet_cmd_link_l_target = AR $@
490
491ifdef CONFIG_THIN_ARCHIVES
492 cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y)
493else
494 cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
495endif
496
497$(lib-target): $(lib-y) FORCE
498 $(call if_changed,link_l_target)
499
500targets += $(lib-target)
501
502dummy-object = $(obj)/.lib_exports.o
503ksyms-lds = $(dot-target).lds
504ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
505ref_prefix = EXTERN(_
506else
507ref_prefix = EXTERN(
508endif
509
510quiet_cmd_export_list = EXPORTS $@
511cmd_export_list = $(OBJDUMP) -h $< | \
512 sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\
513 rm -f $(dummy-object);\
514 echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
515 $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
516 rm $(dummy-object) $(ksyms-lds)
517
518$(obj)/lib-ksyms.o: $(lib-target) FORCE
519 $(call if_changed,export_list)
520
521targets += $(obj)/lib-ksyms.o
522
523endif
524
525#
526# Rule to link composite objects
527#
528# Composite objects are specified in kbuild makefile as follows:
529# <composite-object>-objs := <list of .o files>
530# or
531# <composite-object>-y := <list of .o files>
532# or
533# <composite-object>-m := <list of .o files>
534# The -m syntax only works if <composite object> is a module
535link_multi_deps = \
536$(filter $(addprefix $(obj)/, \
537$($(subst $(obj)/,,$(@:.o=-objs))) \
538$($(subst $(obj)/,,$(@:.o=-y))) \
539$($(subst $(obj)/,,$(@:.o=-m)))), $^)
540
541cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
542
543ifdef CONFIG_THIN_ARCHIVES
544 quiet_cmd_link_multi-y = AR $@
545 cmd_link_multi-y = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
546else
547 quiet_cmd_link_multi-y = LD $@
548 cmd_link_multi-y = $(cmd_link_multi-link)
549endif
550
551quiet_cmd_link_multi-m = LD [M] $@
552cmd_link_multi-m = $(cmd_link_multi-link)
553
554$(multi-used-y): FORCE
555 $(call if_changed,link_multi-y)
556$(call multi_depend, $(multi-used-y), .o, -objs -y)
557
558$(multi-used-m): FORCE
559 $(call if_changed,link_multi-m)
560 @{ echo $(@:.o=.ko); echo $(link_multi_deps); \
561 $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
562$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
563
564targets += $(multi-used-y) $(multi-used-m)
565
566
567# Descending
568# ---------------------------------------------------------------------------
569
570PHONY += $(subdir-ym)
571$(subdir-ym):
572 $(Q)$(MAKE) $(build)=$@
573
574# Add FORCE to the prequisites of a target to force it to be always rebuilt.
575# ---------------------------------------------------------------------------
576
577PHONY += FORCE
578
579FORCE:
580
581# Read all saved command lines and dependencies for the $(targets) we
582# may be building above, using $(if_changed{,_dep}). As an
583# optimization, we don't need to read them if the target does not
584# exist, we will rebuild anyway in that case.
585
586targets := $(wildcard $(sort $(targets)))
587cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
588
589ifneq ($(cmd_files),)
590 include $(cmd_files)
591endif
592
593# Declare the contents of the .PHONY variable as phony. We keep that
594# information in a variable se we can use it in if_changed and friends.
595
596.PHONY: $(PHONY)