Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6-microblaze.git] / scripts / Makefile.build
1 # SPDX-License-Identifier: GPL-2.0
2 # ==========================================================================
3 # Building
4 # ==========================================================================
5
6 src := $(obj)
7
8 PHONY := __build
9 __build:
10
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  :=
26 asflags-y  :=
27 ccflags-y  :=
28 cppflags-y :=
29 ldflags-y  :=
30
31 subdir-asflags-y :=
32 subdir-ccflags-y :=
33
34 # Read auto.conf if it exists, otherwise ignore
35 -include include/config/auto.conf
36
37 include scripts/Kbuild.include
38
39 # The filename Kbuild has precedence over Makefile
40 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
41 kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
42 include $(kbuild-file)
43
44 include scripts/Makefile.lib
45
46 # Do not include host rules unless needed
47 ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
48 include scripts/Makefile.host
49 endif
50
51 ifndef obj
52 $(warning kbuild: Makefile.build is included improperly)
53 endif
54
55 ifeq ($(need-modorder),)
56 ifneq ($(obj-m),)
57 $(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.)
58 $(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.)
59 endif
60 endif
61
62 # ===========================================================================
63
64 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
65 lib-target := $(obj)/lib.a
66 real-obj-y += $(obj)/lib-ksyms.o
67 endif
68
69 ifneq ($(strip $(real-obj-y) $(need-builtin)),)
70 builtin-target := $(obj)/built-in.a
71 endif
72
73 ifeq ($(CONFIG_MODULES)$(need-modorder),y1)
74 modorder-target := $(obj)/modules.order
75 endif
76
77 mod-targets := $(patsubst %.o, %.mod, $(obj-m))
78
79 # Linus' kernel sanity checking tool
80 ifeq ($(KBUILD_CHECKSRC),1)
81   quiet_cmd_checksrc       = CHECK   $<
82         cmd_checksrc       = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
83 else ifeq ($(KBUILD_CHECKSRC),2)
84   quiet_cmd_force_checksrc = CHECK   $<
85         cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
86 endif
87
88 ifneq ($(KBUILD_EXTRA_WARN),)
89   cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
90 endif
91
92 # Compile C sources (.c)
93 # ---------------------------------------------------------------------------
94
95 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
96       cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
97
98 $(obj)/%.s: $(src)/%.c FORCE
99         $(call if_changed_dep,cc_s_c)
100
101 quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
102 cmd_cpp_i_c       = $(CPP) $(c_flags) -o $@ $<
103
104 $(obj)/%.i: $(src)/%.c FORCE
105         $(call if_changed_dep,cpp_i_c)
106
107 # These mirror gensymtypes_S and co below, keep them in synch.
108 cmd_gensymtypes_c =                                                         \
109     $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
110     scripts/genksyms/genksyms $(if $(1), -T $(2))                           \
111      $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS))                             \
112      $(if $(KBUILD_PRESERVE),-p)                                            \
113      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
114
115 quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
116 cmd_cc_symtypes_c =                                                         \
117     $(call cmd_gensymtypes_c,true,$@) >/dev/null;                           \
118     test -s $@ || rm -f $@
119
120 $(obj)/%.symtypes : $(src)/%.c FORCE
121         $(call cmd,cc_symtypes_c)
122
123 # LLVM assembly
124 # Generate .ll files from .c
125 quiet_cmd_cc_ll_c = CC $(quiet_modtag)  $@
126       cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $<
127
128 $(obj)/%.ll: $(src)/%.c FORCE
129         $(call if_changed_dep,cc_ll_c)
130
131 # C (.c) files
132 # The C file is compiled and updated dependency information is generated.
133 # (See cmd_cc_o_c + relevant part of rule_cc_o_c)
134
135 quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@
136       cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
137
138 ifdef CONFIG_MODVERSIONS
139 # When module versioning is enabled the following steps are executed:
140 # o compile a <file>.o from <file>.c
141 # o if <file>.o doesn't contain a __ksymtab version, i.e. does
142 #   not export symbols, it's done.
143 # o otherwise, we calculate symbol versions using the good old
144 #   genksyms on the preprocessed source and postprocess them in a way
145 #   that they are usable as a linker script
146 # o generate .tmp_<file>.o from <file>.o using the linker to
147 #   replace the unresolved symbols __crc_exported_symbol with
148 #   the actual value of the checksum generated by genksyms
149 # o remove .tmp_<file>.o to <file>.o
150
151 cmd_modversions_c =                                                             \
152         if $(OBJDUMP) -h $@ | grep -q __ksymtab; then                           \
153                 $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))  \
154                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
155                                                                                 \
156                 $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@               \
157                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
158                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
159                 rm -f $(@D)/.tmp_$(@F:.o=.ver);                                 \
160         fi
161 endif
162
163 ifdef CONFIG_FTRACE_MCOUNT_RECORD
164 ifndef CC_USING_RECORD_MCOUNT
165 # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl
166 ifdef BUILD_C_RECORDMCOUNT
167 ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
168   RECORDMCOUNT_FLAGS = -w
169 endif
170 # Due to recursion, we must skip empty.o.
171 # The empty.o file is created in the make process in order to determine
172 # the target endianness and word size. It is made before all other C
173 # files, including recordmcount.
174 sub_cmd_record_mcount =                                 \
175         if [ $(@) != "scripts/mod/empty.o" ]; then      \
176                 $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
177         fi;
178 recordmcount_source := $(srctree)/scripts/recordmcount.c \
179                     $(srctree)/scripts/recordmcount.h
180 else
181 sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
182         "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
183         "$(if $(CONFIG_64BIT),64,32)" \
184         "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
185         "$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
186         "$(if $(part-of-module),1,0)" "$(@)";
187 recordmcount_source := $(srctree)/scripts/recordmcount.pl
188 endif # BUILD_C_RECORDMCOUNT
189 cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \
190         $(sub_cmd_record_mcount))
191 endif # CC_USING_RECORD_MCOUNT
192 endif # CONFIG_FTRACE_MCOUNT_RECORD
193
194 ifdef CONFIG_STACK_VALIDATION
195 ifneq ($(SKIP_STACK_VALIDATION),1)
196
197 __objtool_obj := $(objtree)/tools/objtool/objtool
198
199 objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check)
200
201 objtool_args += $(if $(part-of-module), --module,)
202
203 ifndef CONFIG_FRAME_POINTER
204 objtool_args += --no-fp
205 endif
206 ifdef CONFIG_GCOV_KERNEL
207 objtool_args += --no-unreachable
208 endif
209 ifdef CONFIG_RETPOLINE
210   objtool_args += --retpoline
211 endif
212 ifdef CONFIG_X86_SMAP
213   objtool_args += --uaccess
214 endif
215
216 # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
217 # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
218 # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
219 cmd_objtool = $(if $(patsubst y%,, \
220         $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
221         $(__objtool_obj) $(objtool_args) $@)
222 objtool_obj = $(if $(patsubst y%,, \
223         $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
224         $(__objtool_obj))
225
226 endif # SKIP_STACK_VALIDATION
227 endif # CONFIG_STACK_VALIDATION
228
229 # Rebuild all objects when objtool changes, or is enabled/disabled.
230 objtool_dep = $(objtool_obj)                                    \
231               $(wildcard include/config/orc/unwinder.h          \
232                          include/config/stack/validation.h)
233
234 ifdef CONFIG_TRIM_UNUSED_KSYMS
235 cmd_gen_ksymdeps = \
236         $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
237 endif
238
239 define rule_cc_o_c
240         $(call cmd,checksrc)
241         $(call cmd_and_fixdep,cc_o_c)
242         $(call cmd,gen_ksymdeps)
243         $(call cmd,checkdoc)
244         $(call cmd,objtool)
245         $(call cmd,modversions_c)
246         $(call cmd,record_mcount)
247 endef
248
249 define rule_as_o_S
250         $(call cmd_and_fixdep,as_o_S)
251         $(call cmd,gen_ksymdeps)
252         $(call cmd,objtool)
253         $(call cmd,modversions_S)
254 endef
255
256 # List module undefined symbols (or empty line if not enabled)
257 ifdef CONFIG_TRIM_UNUSED_KSYMS
258 cmd_undef_syms = $(NM) $< | sed -n 's/^  *U //p' | xargs echo
259 else
260 cmd_undef_syms = echo
261 endif
262
263 # Built-in and composite module parts
264 $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
265         $(call cmd,force_checksrc)
266         $(call if_changed_rule,cc_o_c)
267
268 cmd_mod = { \
269         echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
270         $(cmd_undef_syms); \
271         } > $@
272
273 $(obj)/%.mod: $(obj)/%.o FORCE
274         $(call if_changed,mod)
275
276 targets += $(mod-targets)
277
278 quiet_cmd_cc_lst_c = MKLST   $@
279       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
280                      $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
281                                      System.map $(OBJDUMP) > $@
282
283 $(obj)/%.lst: $(src)/%.c FORCE
284         $(call if_changed_dep,cc_lst_c)
285
286 # header test (header-test-y, header-test-m target)
287 # ---------------------------------------------------------------------------
288
289 quiet_cmd_cc_s_h = CC      $@
290       cmd_cc_s_h = $(CC) $(c_flags) -S -o $@ -x c /dev/null -include $<
291
292 $(obj)/%.h.s: $(src)/%.h FORCE
293         $(call if_changed_dep,cc_s_h)
294
295 # Compile assembler sources (.S)
296 # ---------------------------------------------------------------------------
297
298 # .S file exports must have their C prototypes defined in asm/asm-prototypes.h
299 # or a file that it includes, in order to get versioned symbols. We build a
300 # dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
301 # the .S file (with trailing ';'), and run genksyms on that, to extract vers.
302 #
303 # This is convoluted. The .S file must first be preprocessed to run guards and
304 # expand names, then the resulting exports must be constructed into plain
305 # EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
306 # to make the genksyms input.
307 #
308 # These mirror gensymtypes_c and co above, keep them in synch.
309 cmd_gensymtypes_S =                                                         \
310    { echo "\#include <linux/kernel.h>" ;                                    \
311      echo "\#include <asm/asm-prototypes.h>" ;                              \
312     $(CPP) $(a_flags) $< |                                                  \
313      grep "\<___EXPORT_SYMBOL\>" |                                          \
314      sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \
315     $(CPP) -D__GENKSYMS__ $(c_flags) -xc - |                                \
316     scripts/genksyms/genksyms $(if $(1), -T $(2))                           \
317      $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS))                             \
318      $(if $(KBUILD_PRESERVE),-p)                                            \
319      -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
320
321 quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
322 cmd_cc_symtypes_S =                                                         \
323     $(call cmd_gensymtypes_S,true,$@) >/dev/null;                           \
324     test -s $@ || rm -f $@
325
326 $(obj)/%.symtypes : $(src)/%.S FORCE
327         $(call cmd,cc_symtypes_S)
328
329
330 quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
331 cmd_cpp_s_S       = $(CPP) $(a_flags) -o $@ $<
332
333 $(obj)/%.s: $(src)/%.S FORCE
334         $(call if_changed_dep,cpp_s_S)
335
336 quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
337       cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
338
339 ifdef CONFIG_ASM_MODVERSIONS
340
341 # versioning matches the C process described above, with difference that
342 # we parse asm-prototypes.h C header to get function definitions.
343
344 cmd_modversions_S =                                                             \
345         if $(OBJDUMP) -h $@ | grep -q __ksymtab; then                           \
346                 $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))  \
347                     > $(@D)/.tmp_$(@F:.o=.ver);                                 \
348                                                                                 \
349                 $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@               \
350                         -T $(@D)/.tmp_$(@F:.o=.ver);                            \
351                 mv -f $(@D)/.tmp_$(@F) $@;                                      \
352                 rm -f $(@D)/.tmp_$(@F:.o=.ver);                                 \
353         fi
354 endif
355
356 $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
357         $(call if_changed_rule,as_o_S)
358
359 targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y)
360 targets += $(extra-y) $(MAKECMDGOALS) $(always)
361
362 # Linker scripts preprocessor (.lds.S -> .lds)
363 # ---------------------------------------------------------------------------
364 quiet_cmd_cpp_lds_S = LDS     $@
365       cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \
366                              -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
367
368 $(obj)/%.lds: $(src)/%.lds.S FORCE
369         $(call if_changed_dep,cpp_lds_S)
370
371 # ASN.1 grammar
372 # ---------------------------------------------------------------------------
373 quiet_cmd_asn1_compiler = ASN.1   $(basename $@).[ch]
374       cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
375                                 $(basename $@).c $(basename $@).h
376
377 $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
378         $(call cmd,asn1_compiler)
379
380 # Build the compiled-in targets
381 # ---------------------------------------------------------------------------
382
383 # To build objects in subdirs, we need to descend into the directories
384 $(sort $(subdir-obj-y)): $(subdir-ym) ;
385
386 #
387 # Rule to compile a set of .o files into one .a file (without symbol table)
388 #
389 ifdef builtin-target
390
391 quiet_cmd_ar_builtin = AR      $@
392       cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs)
393
394 $(builtin-target): $(real-obj-y) FORCE
395         $(call if_changed,ar_builtin)
396
397 targets += $(builtin-target)
398 endif # builtin-target
399
400 #
401 # Rule to create modules.order file
402 #
403 # Create commands to either record .ko file or cat modules.order from
404 # a subdirectory
405 $(modorder-target): $(subdir-ym) FORCE
406         $(Q){ $(foreach m, $(modorder), \
407         $(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
408         | $(AWK) '!x[$$0]++' - > $@
409
410 #
411 # Rule to compile a set of .o files into one .a file (with symbol table)
412 #
413 ifdef lib-target
414
415 $(lib-target): $(lib-y) FORCE
416         $(call if_changed,ar)
417
418 targets += $(lib-target)
419
420 dummy-object = $(obj)/.lib_exports.o
421 ksyms-lds = $(dot-target).lds
422
423 quiet_cmd_export_list = EXPORTS $@
424 cmd_export_list = $(OBJDUMP) -h $< | \
425         sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\
426         rm -f $(dummy-object);\
427         echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
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)
433
434 targets += $(obj)/lib-ksyms.o
435
436 endif
437
438 # NOTE:
439 # Do not replace $(filter %.o,^) with $(real-prereqs). When a single object
440 # module is turned into a multi object module, $^ will contain header file
441 # dependencies recorded in the .*.cmd file.
442 quiet_cmd_link_multi-m = LD [M]  $@
443       cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^)
444
445 $(multi-used-m): FORCE
446         $(call if_changed,link_multi-m)
447 $(call multi_depend, $(multi-used-m), .o, -objs -y -m)
448
449 targets += $(multi-used-m)
450 targets := $(filter-out $(PHONY), $(targets))
451
452 # Add intermediate targets:
453 # When building objects with specific suffix patterns, add intermediate
454 # targets that the final targets are derived from.
455 intermediate_targets = $(foreach sfx, $(2), \
456                                 $(patsubst %$(strip $(1)),%$(sfx), \
457                                         $(filter %$(strip $(1)), $(targets))))
458 # %.asn1.o <- %.asn1.[ch] <- %.asn1
459 # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
460 # %.lex.o <- %.lex.c <- %.l
461 # %.tab.o <- %.tab.[ch] <- %.y
462 targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
463            $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \
464            $(call intermediate_targets, .lex.o, .lex.c) \
465            $(call intermediate_targets, .tab.o, .tab.c .tab.h)
466
467 # Build
468 # ---------------------------------------------------------------------------
469
470 ifdef single-build
471
472 curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \
473                         $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x))))
474
475 # Handle single targets without any rule: show "Nothing to be done for ..." or
476 # "No rule to make target ..." depending on whether the target exists.
477 unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \
478                         $(filter $(obj)/%, \
479                                 $(filter-out $(curdir-single), \
480                                         $(KBUILD_SINGLE_TARGETS))))
481
482 __build: $(curdir-single) $(subdir-ym)
483 ifneq ($(unknown-single),)
484         $(Q)$(MAKE) -f /dev/null $(unknown-single)
485 endif
486         @:
487
488 ifeq ($(curdir-single),)
489 # Nothing to do in this directory. Do not include any .*.cmd file for speed-up
490 targets :=
491 else
492 targets += $(curdir-single)
493 endif
494
495 else
496
497 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
498          $(if $(KBUILD_MODULES),$(obj-m) $(mod-targets) $(modorder-target)) \
499          $(subdir-ym) $(always)
500         @:
501
502 endif
503
504 # Descending
505 # ---------------------------------------------------------------------------
506
507 PHONY += $(subdir-ym)
508 $(subdir-ym):
509         $(Q)$(MAKE) $(build)=$@ \
510         $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \
511         need-builtin=$(if $(filter $@/built-in.a, $(subdir-obj-y)),1) \
512         need-modorder=$(if $(need-modorder),$(if $(filter $@/modules.order, $(modorder)),1))
513
514 # Add FORCE to the prequisites of a target to force it to be always rebuilt.
515 # ---------------------------------------------------------------------------
516
517 PHONY += FORCE
518
519 FORCE:
520
521 # Read all saved command lines and dependencies for the $(targets) we
522 # may be building above, using $(if_changed{,_dep}). As an
523 # optimization, we don't need to read them if the target does not
524 # exist, we will rebuild anyway in that case.
525
526 existing-targets := $(wildcard $(sort $(targets)))
527
528 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
529
530 ifdef building_out_of_srctree
531 # Create directories for object files if they do not exist
532 obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
533 # If targets exist, their directories apparently exist. Skip mkdir.
534 existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
535 obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
536 ifneq ($(obj-dirs),)
537 $(shell mkdir -p $(obj-dirs))
538 endif
539 endif
540
541 .PHONY: $(PHONY)