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)") | |
49 | $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS) | |
50 | endif | |
51 | endif | |
4a5838ad BP |
52 | |
53 | # | |
54 | # make W=1 settings | |
55 | # | |
56 | # $(call cc-option... ) handles gcc -W.. options which | |
57 | # are not supported by all versions of the compiler | |
58 | ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS | |
59 | KBUILD_EXTRA_WARNINGS := -Wextra | |
60 | KBUILD_EXTRA_WARNINGS += -Wunused -Wno-unused-parameter | |
61 | KBUILD_EXTRA_WARNINGS += -Waggregate-return | |
62 | KBUILD_EXTRA_WARNINGS += -Wbad-function-cast | |
63 | KBUILD_EXTRA_WARNINGS += -Wcast-qual | |
64 | KBUILD_EXTRA_WARNINGS += -Wcast-align | |
65 | KBUILD_EXTRA_WARNINGS += -Wconversion | |
66 | KBUILD_EXTRA_WARNINGS += -Wdisabled-optimization | |
67 | KBUILD_EXTRA_WARNINGS += -Wlogical-op | |
68 | KBUILD_EXTRA_WARNINGS += -Wmissing-declarations | |
69 | KBUILD_EXTRA_WARNINGS += -Wmissing-format-attribute | |
70 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Wmissing-include-dirs,) | |
71 | KBUILD_EXTRA_WARNINGS += -Wmissing-prototypes | |
72 | KBUILD_EXTRA_WARNINGS += -Wnested-externs | |
73 | KBUILD_EXTRA_WARNINGS += -Wold-style-definition | |
74 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Woverlength-strings,) | |
75 | KBUILD_EXTRA_WARNINGS += -Wpacked | |
76 | KBUILD_EXTRA_WARNINGS += -Wpacked-bitfield-compat | |
77 | KBUILD_EXTRA_WARNINGS += -Wpadded | |
78 | KBUILD_EXTRA_WARNINGS += -Wpointer-arith | |
79 | KBUILD_EXTRA_WARNINGS += -Wredundant-decls | |
80 | KBUILD_EXTRA_WARNINGS += -Wshadow | |
81 | KBUILD_EXTRA_WARNINGS += -Wswitch-default | |
82 | KBUILD_EXTRA_WARNINGS += $(call cc-option, -Wvla,) | |
83 | KBUILD_CFLAGS += $(KBUILD_EXTRA_WARNINGS) | |
84 | endif | |
85 | ||
1da177e4 LT |
86 | include scripts/Makefile.lib |
87 | ||
88 | ifdef host-progs | |
89 | ifneq ($(hostprogs-y),$(host-progs)) | |
90 | $(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) | |
91 | hostprogs-y += $(host-progs) | |
92 | endif | |
93 | endif | |
94 | ||
3156fd05 | 95 | # Do not include host rules unless needed |
1da177e4 LT |
96 | ifneq ($(hostprogs-y)$(hostprogs-m),) |
97 | include scripts/Makefile.host | |
98 | endif | |
99 | ||
100 | ifneq ($(KBUILD_SRC),) | |
101 | # Create output directory if not already present | |
102 | _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) | |
103 | ||
104 | # Create directories for object files if directory does not exist | |
105 | # Needed when obj-y := dir/file.o syntax is used | |
106 | _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) | |
107 | endif | |
108 | ||
1da177e4 LT |
109 | ifndef obj |
110 | $(warning kbuild: Makefile.build is included improperly) | |
111 | endif | |
112 | ||
113 | # =========================================================================== | |
114 | ||
115 | ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),) | |
116 | lib-target := $(obj)/lib.a | |
117 | endif | |
118 | ||
4b024242 | 119 | ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),) |
1da177e4 LT |
120 | builtin-target := $(obj)/built-in.o |
121 | endif | |
122 | ||
551559e1 TH |
123 | modorder-target := $(obj)/modules.order |
124 | ||
1da177e4 LT |
125 | # We keep a list of all modules in $(MODVERDIR) |
126 | ||
127 | __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ | |
551559e1 | 128 | $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
1da177e4 LT |
129 | $(subdir-ym) $(always) |
130 | @: | |
131 | ||
132 | # Linus' kernel sanity checking tool | |
133 | ifneq ($(KBUILD_CHECKSRC),0) | |
134 | ifeq ($(KBUILD_CHECKSRC),2) | |
135 | quiet_cmd_force_checksrc = CHECK $< | |
136 | cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
137 | else | |
138 | quiet_cmd_checksrc = CHECK $< | |
139 | cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; | |
140 | endif | |
141 | endif | |
142 | ||
91341d4b SR |
143 | # Do section mismatch analysis for each module/built-in.o |
144 | ifdef CONFIG_DEBUG_SECTION_MISMATCH | |
145 | cmd_secanalysis = ; scripts/mod/modpost $@ | |
146 | endif | |
1da177e4 LT |
147 | |
148 | # Compile C sources (.c) | |
149 | # --------------------------------------------------------------------------- | |
150 | ||
151 | # Default is built-in, unless we know otherwise | |
6588169d SR |
152 | modkern_cflags = \ |
153 | $(if $(part-of-module), \ | |
154 | $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ | |
80c00ba9 | 155 | $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
1da177e4 LT |
156 | quiet_modtag := $(empty) $(empty) |
157 | ||
18c167fd SL |
158 | $(real-objs-m) : part-of-module := y |
159 | $(real-objs-m:.o=.i) : part-of-module := y | |
160 | $(real-objs-m:.o=.s) : part-of-module := y | |
161 | $(real-objs-m:.o=.lst): part-of-module := y | |
1da177e4 LT |
162 | |
163 | $(real-objs-m) : quiet_modtag := [M] | |
164 | $(real-objs-m:.o=.i) : quiet_modtag := [M] | |
165 | $(real-objs-m:.o=.s) : quiet_modtag := [M] | |
166 | $(real-objs-m:.o=.lst): quiet_modtag := [M] | |
167 | ||
168 | $(obj-m) : quiet_modtag := [M] | |
169 | ||
170 | # Default for not multi-part modules | |
5e8d780d | 171 | modname = $(basetarget) |
1da177e4 LT |
172 | |
173 | $(multi-objs-m) : modname = $(modname-multi) | |
174 | $(multi-objs-m:.o=.i) : modname = $(modname-multi) | |
175 | $(multi-objs-m:.o=.s) : modname = $(modname-multi) | |
176 | $(multi-objs-m:.o=.lst) : modname = $(modname-multi) | |
177 | $(multi-objs-y) : modname = $(modname-multi) | |
178 | $(multi-objs-y:.o=.i) : modname = $(modname-multi) | |
179 | $(multi-objs-y:.o=.s) : modname = $(modname-multi) | |
180 | $(multi-objs-y:.o=.lst) : modname = $(modname-multi) | |
181 | ||
182 | quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ | |
7d185983 | 183 | cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $< |
1da177e4 | 184 | |
767e581d | 185 | $(obj)/%.s: $(src)/%.c FORCE |
1da177e4 LT |
186 | $(call if_changed_dep,cc_s_c) |
187 | ||
188 | quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ | |
189 | cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< | |
190 | ||
767e581d | 191 | $(obj)/%.i: $(src)/%.c FORCE |
1da177e4 LT |
192 | $(call if_changed_dep,cc_i_c) |
193 | ||
2ea03891 | 194 | cmd_gensymtypes = \ |
37a8d9f6 | 195 | $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
e26d6b83 | 196 | $(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \ |
37a8d9f6 | 197 | $(if $(KBUILD_PRESERVE),-p) \ |
e26d6b83 | 198 | -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
37a8d9f6 | 199 | |
15fde675 | 200 | quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
37a8d9f6 SR |
201 | cmd_cc_symtypes_c = \ |
202 | set -e; \ | |
e26d6b83 | 203 | $(call cmd_gensymtypes,true,$@) >/dev/null; \ |
37a8d9f6 | 204 | test -s $@ || rm -f $@ |
15fde675 | 205 | |
767e581d | 206 | $(obj)/%.symtypes : $(src)/%.c FORCE |
64e6c1e1 | 207 | $(call cmd,cc_symtypes_c) |
15fde675 | 208 | |
1da177e4 LT |
209 | # C (.c) files |
210 | # The C file is compiled and updated dependency information is generated. | |
211 | # (See cmd_cc_o_c + relevant part of rule_cc_o_c) | |
212 | ||
213 | quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ | |
214 | ||
215 | ifndef CONFIG_MODVERSIONS | |
216 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
217 | ||
218 | else | |
219 | # When module versioning is enabled the following steps are executed: | |
2ea03891 SR |
220 | # o compile a .tmp_<file>.o from <file>.c |
221 | # o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does | |
222 | # not export symbols, we just rename .tmp_<file>.o to <file>.o and | |
1da177e4 LT |
223 | # are done. |
224 | # o otherwise, we calculate symbol versions using the good old | |
225 | # genksyms on the preprocessed source and postprocess them in a way | |
2ea03891 SR |
226 | # that they are usable as a linker script |
227 | # o generate <file>.o from .tmp_<file>.o using the linker to | |
228 | # replace the unresolved symbols __crc_exported_symbol with | |
229 | # the actual value of the checksum generated by genksyms | |
1da177e4 | 230 | |
2ea03891 | 231 | cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
e26d6b83 DZ |
232 | cmd_modversions = \ |
233 | if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ | |
234 | $(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ | |
235 | > $(@D)/.tmp_$(@F:.o=.ver); \ | |
236 | \ | |
237 | $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ | |
238 | -T $(@D)/.tmp_$(@F:.o=.ver); \ | |
239 | rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ | |
240 | else \ | |
241 | mv -f $(@D)/.tmp_$(@F) $@; \ | |
1da177e4 LT |
242 | fi; |
243 | endif | |
244 | ||
8da3821b | 245 | ifdef CONFIG_FTRACE_MCOUNT_RECORD |
72441cb1 | 246 | ifdef BUILD_C_RECORDMCOUNT |
d7b4d6de SR |
247 | # Due to recursion, we must skip empty.o. |
248 | # The empty.o file is created in the make process in order to determine | |
249 | # the target endianness and word size. It is made before all other C | |
250 | # files, including recordmcount. | |
45677454 WZ |
251 | sub_cmd_record_mcount = \ |
252 | if [ $(@) != "scripts/mod/empty.o" ]; then \ | |
253 | $(objtree)/scripts/recordmcount "$(@)"; \ | |
254 | fi; | |
72441cb1 | 255 | else |
45677454 | 256 | sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
e6299d26 | 257 | "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
b3acf29a | 258 | "$(if $(CONFIG_64BIT),64,32)" \ |
f9810a82 RV |
259 | "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
260 | "$(LD)" "$(NM)" "$(RM)" "$(MV)" \ | |
18c167fd | 261 | "$(if $(part-of-module),1,0)" "$(@)"; |
8da3821b | 262 | endif |
45677454 WZ |
263 | cmd_record_mcount = \ |
264 | if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \ | |
265 | $(sub_cmd_record_mcount) \ | |
266 | fi; | |
72441cb1 | 267 | endif |
8da3821b | 268 | |
1da177e4 | 269 | define rule_cc_o_c |
6176aa9a JB |
270 | $(call echo-cmd,checksrc) $(cmd_checksrc) \ |
271 | $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ | |
1da177e4 | 272 | $(cmd_modversions) \ |
c3c63b6b | 273 | $(call echo-cmd,record_mcount) \ |
8da3821b | 274 | $(cmd_record_mcount) \ |
48f1f058 SR |
275 | scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
276 | $(dot-target).tmp; \ | |
2ea03891 | 277 | rm -f $(depfile); \ |
48f1f058 | 278 | mv -f $(dot-target).tmp $(dot-target).cmd |
1da177e4 LT |
279 | endef |
280 | ||
281 | # Built-in and composite module parts | |
767e581d | 282 | $(obj)/%.o: $(src)/%.c FORCE |
1da177e4 LT |
283 | $(call cmd,force_checksrc) |
284 | $(call if_changed_rule,cc_o_c) | |
285 | ||
286 | # Single-part modules are special since we need to mark them in $(MODVERDIR) | |
287 | ||
767e581d | 288 | $(single-used-m): $(obj)/%.o: $(src)/%.c FORCE |
1da177e4 LT |
289 | $(call cmd,force_checksrc) |
290 | $(call if_changed_rule,cc_o_c) | |
291 | @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) | |
292 | ||
293 | quiet_cmd_cc_lst_c = MKLST $@ | |
294 | cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ | |
295 | $(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ | |
296 | System.map $(OBJDUMP) > $@ | |
297 | ||
767e581d | 298 | $(obj)/%.lst: $(src)/%.c FORCE |
1da177e4 LT |
299 | $(call if_changed_dep,cc_lst_c) |
300 | ||
301 | # Compile assembler sources (.S) | |
302 | # --------------------------------------------------------------------------- | |
303 | ||
80c00ba9 | 304 | modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
1da177e4 | 305 | |
6588169d SR |
306 | $(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
307 | $(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) | |
1da177e4 LT |
308 | |
309 | quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ | |
310 | cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< | |
311 | ||
767e581d | 312 | $(obj)/%.s: $(src)/%.S FORCE |
1da177e4 LT |
313 | $(call if_changed_dep,as_s_S) |
314 | ||
315 | quiet_cmd_as_o_S = AS $(quiet_modtag) $@ | |
316 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
317 | ||
767e581d | 318 | $(obj)/%.o: $(src)/%.S FORCE |
1da177e4 LT |
319 | $(call if_changed_dep,as_o_S) |
320 | ||
321 | targets += $(real-objs-y) $(real-objs-m) $(lib-y) | |
322 | targets += $(extra-y) $(MAKECMDGOALS) $(always) | |
323 | ||
324 | # Linker scripts preprocessor (.lds.S -> .lds) | |
325 | # --------------------------------------------------------------------------- | |
326 | quiet_cmd_cpp_lds_S = LDS $@ | |
51b563fc | 327 | cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
42f29a25 | 328 | -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
1da177e4 | 329 | |
767e581d | 330 | $(obj)/%.lds: $(src)/%.lds.S FORCE |
1da177e4 LT |
331 | $(call if_changed_dep,cpp_lds_S) |
332 | ||
333 | # Build the compiled-in targets | |
334 | # --------------------------------------------------------------------------- | |
335 | ||
336 | # To build objects in subdirs, we need to descend into the directories | |
337 | $(sort $(subdir-obj-y)): $(subdir-ym) ; | |
338 | ||
339 | # | |
340 | # Rule to compile a set of .o files into one .o file | |
341 | # | |
342 | ifdef builtin-target | |
343 | quiet_cmd_link_o_target = LD $@ | |
344 | # If the list of objects to link is empty, just create an empty built-in.o | |
345 | cmd_link_o_target = $(if $(strip $(obj-y)),\ | |
91341d4b SR |
346 | $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
347 | $(cmd_secanalysis),\ | |
1da177e4 LT |
348 | rm -f $@; $(AR) rcs $@) |
349 | ||
350 | $(builtin-target): $(obj-y) FORCE | |
351 | $(call if_changed,link_o_target) | |
352 | ||
353 | targets += $(builtin-target) | |
354 | endif # builtin-target | |
355 | ||
551559e1 TH |
356 | # |
357 | # Rule to create modules.order file | |
358 | # | |
359 | # Create commands to either record .ko file or cat modules.order from | |
360 | # a subdirectory | |
361 | modorder-cmds = \ | |
362 | $(foreach m, $(modorder), \ | |
363 | $(if $(filter %/modules.order, $m), \ | |
364 | cat $m;, echo kernel/$m;)) | |
365 | ||
366 | $(modorder-target): $(subdir-ym) FORCE | |
367 | $(Q)(cat /dev/null; $(modorder-cmds)) > $@ | |
368 | ||
1da177e4 LT |
369 | # |
370 | # Rule to compile a set of .o files into one .a file | |
371 | # | |
372 | ifdef lib-target | |
373 | quiet_cmd_link_l_target = AR $@ | |
5e54d5e5 | 374 | cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y) |
1da177e4 LT |
375 | |
376 | $(lib-target): $(lib-y) FORCE | |
377 | $(call if_changed,link_l_target) | |
378 | ||
379 | targets += $(lib-target) | |
380 | endif | |
381 | ||
382 | # | |
383 | # Rule to link composite objects | |
384 | # | |
385 | # Composite objects are specified in kbuild makefile as follows: | |
386 | # <composite-object>-objs := <list of .o files> | |
387 | # or | |
388 | # <composite-object>-y := <list of .o files> | |
389 | link_multi_deps = \ | |
390 | $(filter $(addprefix $(obj)/, \ | |
391 | $($(subst $(obj)/,,$(@:.o=-objs))) \ | |
392 | $($(subst $(obj)/,,$(@:.o=-y)))), $^) | |
393 | ||
394 | quiet_cmd_link_multi-y = LD $@ | |
91341d4b | 395 | cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
1da177e4 LT |
396 | |
397 | quiet_cmd_link_multi-m = LD [M] $@ | |
114f5157 | 398 | cmd_link_multi-m = $(cmd_link_multi-y) |
1da177e4 LT |
399 | |
400 | # We would rather have a list of rules like | |
401 | # foo.o: $(foo-objs) | |
402 | # but that's not so easy, so we rather make all composite objects depend | |
403 | # on the set of all their parts | |
404 | $(multi-used-y) : %.o: $(multi-objs-y) FORCE | |
405 | $(call if_changed,link_multi-y) | |
406 | ||
407 | $(multi-used-m) : %.o: $(multi-objs-m) FORCE | |
408 | $(call if_changed,link_multi-m) | |
409 | @{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) | |
410 | ||
411 | targets += $(multi-used-y) $(multi-used-m) | |
412 | ||
413 | ||
414 | # Descending | |
415 | # --------------------------------------------------------------------------- | |
416 | ||
4f193362 | 417 | PHONY += $(subdir-ym) |
1da177e4 LT |
418 | $(subdir-ym): |
419 | $(Q)$(MAKE) $(build)=$@ | |
420 | ||
421 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
422 | # --------------------------------------------------------------------------- | |
423 | ||
4f193362 | 424 | PHONY += FORCE |
1da177e4 LT |
425 | |
426 | FORCE: | |
427 | ||
428 | # Read all saved command lines and dependencies for the $(targets) we | |
429 | # may be building above, using $(if_changed{,_dep}). As an | |
430 | # optimization, we don't need to read them if the target does not | |
431 | # exist, we will rebuild anyway in that case. | |
432 | ||
433 | targets := $(wildcard $(sort $(targets))) | |
434 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
435 | ||
436 | ifneq ($(cmd_files),) | |
437 | include $(cmd_files) | |
438 | endif | |
4f193362 | 439 | |
4f193362 PS |
440 | # Declare the contents of the .PHONY variable as phony. We keep that |
441 | # information in a variable se we can use it in if_changed and friends. | |
442 | ||
443 | .PHONY: $(PHONY) |