blob: f40431fd7df15a69c0bd683219308686dd82fdd3
| 1 | #### |
| 2 | # kbuild: Generic definitions |
| 3 | |
| 4 | # Convenient variables |
| 5 | comma := , |
| 6 | quote := " |
| 7 | squote := ' |
| 8 | empty := |
| 9 | space := $(empty) $(empty) |
| 10 | space_escape := _-_SPACE_-_ |
| 11 | pound := \# |
| 12 | |
| 13 | ### |
| 14 | # Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o |
| 15 | dot-target = $(dir $@).$(notdir $@) |
| 16 | |
| 17 | ### |
| 18 | # The temporary file to save gcc -MD generated dependencies must not |
| 19 | # contain a comma |
| 20 | depfile = $(subst $(comma),_,$(dot-target).d) |
| 21 | |
| 22 | ### |
| 23 | # filename of target with directory and extension stripped |
| 24 | basetarget = $(basename $(notdir $@)) |
| 25 | |
| 26 | ### |
| 27 | # filename of first prerequisite with directory and extension stripped |
| 28 | baseprereq = $(basename $(notdir $<)) |
| 29 | |
| 30 | ### |
| 31 | # Escape single quote for use in echo statements |
| 32 | escsq = $(subst $(squote),'\$(squote)',$1) |
| 33 | |
| 34 | ### |
| 35 | # Easy method for doing a status message |
| 36 | kecho := : |
| 37 | quiet_kecho := echo |
| 38 | silent_kecho := : |
| 39 | kecho := $($(quiet)kecho) |
| 40 | |
| 41 | ### |
| 42 | # filechk is used to check if the content of a generated file is updated. |
| 43 | # Sample usage: |
| 44 | # define filechk_sample |
| 45 | # echo $KERNELRELEASE |
| 46 | # endef |
| 47 | # version.h : Makefile |
| 48 | # $(call filechk,sample) |
| 49 | # The rule defined shall write to stdout the content of the new file. |
| 50 | # The existing file will be compared with the new one. |
| 51 | # - If no file exist it is created |
| 52 | # - If the content differ the new file is used |
| 53 | # - If they are equal no change, and no timestamp update |
| 54 | # - stdin is piped in from the first prerequisite ($<) so one has |
| 55 | # to specify a valid file as first prerequisite (often the kbuild file) |
| 56 | define filechk |
| 57 | $(Q)set -e; \ |
| 58 | $(kecho) ' CHK $@'; \ |
| 59 | mkdir -p $(dir $@); \ |
| 60 | $(filechk_$(1)) < $< > $@.tmp; \ |
| 61 | if [ -r $@ ] && cmp -s $@ $@.tmp; then \ |
| 62 | rm -f $@.tmp; \ |
| 63 | else \ |
| 64 | $(kecho) ' UPD $@'; \ |
| 65 | mv -f $@.tmp $@; \ |
| 66 | fi |
| 67 | endef |
| 68 | |
| 69 | ###### |
| 70 | # gcc support functions |
| 71 | # See documentation in Documentation/kbuild/makefiles.txt |
| 72 | |
| 73 | # cc-cross-prefix |
| 74 | # Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-) |
| 75 | # Return first prefix where a prefix$(CC) is found in PATH. |
| 76 | # If no $(CC) found in PATH with listed prefixes return nothing |
| 77 | cc-cross-prefix = \ |
| 78 | $(word 1, $(foreach c,$(1), \ |
| 79 | $(shell set -e; \ |
| 80 | if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \ |
| 81 | echo $(c); \ |
| 82 | fi))) |
| 83 | |
| 84 | # output directory for tests below |
| 85 | TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) |
| 86 | |
| 87 | # try-run |
| 88 | # Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) |
| 89 | # Exit code chooses option. "$$TMP" is can be used as temporary file and |
| 90 | # is automatically cleaned up. |
| 91 | try-run = $(shell set -e; \ |
| 92 | TMP="$(TMPOUT).$$$$.tmp"; \ |
| 93 | TMPO="$(TMPOUT).$$$$.o"; \ |
| 94 | if ($(1)) >/dev/null 2>&1; \ |
| 95 | then echo "$(2)"; \ |
| 96 | else echo "$(3)"; \ |
| 97 | fi; \ |
| 98 | rm -f "$$TMP" "$$TMPO") |
| 99 | |
| 100 | # as-option |
| 101 | # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) |
| 102 | |
| 103 | as-option = $(call try-run,\ |
| 104 | $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2)) |
| 105 | |
| 106 | # as-instr |
| 107 | # Usage: cflags-y += $(call as-instr,instr,option1,option2) |
| 108 | |
| 109 | as-instr = $(call try-run,\ |
| 110 | printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) |
| 111 | |
| 112 | # __cc-option |
| 113 | # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) |
| 114 | __cc-option = $(call try-run,\ |
| 115 | $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4)) |
| 116 | |
| 117 | # Do not attempt to build with gcc plugins during cc-option tests. |
| 118 | # (And this uses delayed resolution so the flags will be up to date.) |
| 119 | CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) |
| 120 | |
| 121 | # cc-option |
| 122 | # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) |
| 123 | |
| 124 | cc-option = $(call __cc-option, $(CC),\ |
| 125 | $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2)) |
| 126 | |
| 127 | # hostcc-option |
| 128 | # Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586) |
| 129 | hostcc-option = $(call __cc-option, $(HOSTCC),\ |
| 130 | $(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2)) |
| 131 | |
| 132 | # cc-option-yn |
| 133 | # Usage: flag := $(call cc-option-yn,-march=winchip-c6) |
| 134 | cc-option-yn = $(call try-run,\ |
| 135 | $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) |
| 136 | |
| 137 | # cc-option-align |
| 138 | # Prefix align with either -falign or -malign |
| 139 | cc-option-align = $(subst -functions=0,,\ |
| 140 | $(call cc-option,-falign-functions=0,-malign-functions=0)) |
| 141 | |
| 142 | # cc-disable-warning |
| 143 | # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) |
| 144 | cc-disable-warning = $(call try-run,\ |
| 145 | $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) |
| 146 | |
| 147 | # cc-name |
| 148 | # Expands to either gcc or clang |
| 149 | cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc) |
| 150 | |
| 151 | # __cc-version |
| 152 | # Returns compiler version |
| 153 | __cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/$(cc-name)-version.sh $(CC)) |
| 154 | |
| 155 | # __cc-fullversion |
| 156 | # Returns full compiler version |
| 157 | __cc-fullversion = $(shell $(CONFIG_SHELL) \ |
| 158 | $(srctree)/scripts/$(cc-name)-version.sh -p $(CC)) |
| 159 | |
| 160 | # __cc-ifversion |
| 161 | # Matches compiler name and version |
| 162 | # Usage: EXTRA_CFLAGS += $(call cc-if-name-version, gcc, -lt, 0402, -O1) |
| 163 | __cc-ifversion = $(shell [ $(cc-name) = $(1) ] && [ $(__cc-version) $(2) $(3) ] && echo $(4) || echo $(5)) |
| 164 | |
| 165 | # __cc-if-fullversion |
| 166 | # Matches compiler name and full version |
| 167 | # Usage: EXTRA_CFLAGS += $(call cc-if-name-fullversion, gcc, -lt, 040502, -O1) |
| 168 | __cc-if-fullversion = $(shell [ $(cc-name) = $(1) ] && [ $(__cc-fullversion) $(2) $(3) ] && echo $(4) || echo $(5)) |
| 169 | |
| 170 | # gcc-ifversion |
| 171 | gcc-ifversion = $(call __cc-ifversion, gcc, $(1), $(2), $(3), $(4)) |
| 172 | |
| 173 | # gcc-if-fullversion |
| 174 | gcc-if-fullversion = (call __cc-if-fullversion, gcc, $(1), $(2), $(3), $(4)) |
| 175 | |
| 176 | # clang-ifversion |
| 177 | clang-ifversion = $(call __cc-ifversion, clang, $(1), $(2), $(3), $(4)) |
| 178 | |
| 179 | # clang-if-fullversion |
| 180 | clang-if-fullversion = (call __cc-if-fullversion, clang, $(1), $(2), $(3), $(4)) |
| 181 | |
| 182 | # cc-version |
| 183 | cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) |
| 184 | |
| 185 | # cc-fullversion |
| 186 | cc-fullversion = $(shell $(CONFIG_SHELL) \ |
| 187 | $(srctree)/scripts/gcc-version.sh -p $(CC)) |
| 188 | |
| 189 | # backward compatibility |
| 190 | cc-ifversion = $(gcc-ifversion) |
| 191 | cc-if-fullversion = $(gcc-if-fullversion) |
| 192 | |
| 193 | # cc-ldoption |
| 194 | # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both) |
| 195 | cc-ldoption = $(call try-run,\ |
| 196 | $(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2)) |
| 197 | |
| 198 | # ld-option |
| 199 | # Usage: LDFLAGS += $(call ld-option, -X) |
| 200 | ld-option = $(call try-run, $(LD) $(LDFLAGS) $(1) -v,$(1),$(2)) |
| 201 | |
| 202 | # ar-option |
| 203 | # Usage: KBUILD_ARFLAGS := $(call ar-option,D) |
| 204 | # Important: no spaces around options |
| 205 | ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) |
| 206 | |
| 207 | # ld-name |
| 208 | # Expands to either bfd or gold |
| 209 | ld-name = $(shell $(LD) -v 2>&1 | grep -q "GNU gold" && echo gold || echo bfd) |
| 210 | |
| 211 | # ld-version |
| 212 | # Note this is mainly for HJ Lu's 3 number binutil versions |
| 213 | ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh) |
| 214 | |
| 215 | # ld-ifversion |
| 216 | # Usage: $(call ld-ifversion, -ge, 22252, y) |
| 217 | ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4)) |
| 218 | |
| 219 | # __ld-ifversion |
| 220 | # Usage: $(call __ld-ifversion, gold, -ge, 112000000, y) |
| 221 | __ld-ifversion = $(shell [ $(ld-name) = $(1) ] && [ $(ld-version) $(2) $(3) ] && echo $(4) || echo $(5)) |
| 222 | |
| 223 | # bfd-ifversion |
| 224 | # Usage: $(call bfd-ifversion, -ge, 227000000, y) |
| 225 | bfd-ifversion = $(call __ld-ifversion, bfd, $(1), $(2), $(3), $(4)) |
| 226 | |
| 227 | # gold-ifversion |
| 228 | # Usage: $(call gold-ifversion, -ge, 112000000, y) |
| 229 | gold-ifversion = $(call __ld-ifversion, gold, $(1), $(2), $(3), $(4)) |
| 230 | |
| 231 | ###### |
| 232 | |
| 233 | ### |
| 234 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= |
| 235 | # Usage: |
| 236 | # $(Q)$(MAKE) $(build)=dir |
| 237 | build := -f $(srctree)/scripts/Makefile.build obj |
| 238 | |
| 239 | ### |
| 240 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj= |
| 241 | # Usage: |
| 242 | # $(Q)$(MAKE) $(modbuiltin)=dir |
| 243 | modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj |
| 244 | |
| 245 | ### |
| 246 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj= |
| 247 | # Usage: |
| 248 | # $(Q)$(MAKE) $(dtbinst)=dir |
| 249 | dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj |
| 250 | |
| 251 | ### |
| 252 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj= |
| 253 | # Usage: |
| 254 | # $(Q)$(MAKE) $(clean)=dir |
| 255 | clean := -f $(srctree)/scripts/Makefile.clean obj |
| 256 | |
| 257 | ### |
| 258 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj= |
| 259 | # Usage: |
| 260 | # $(Q)$(MAKE) $(hdr-inst)=dir |
| 261 | hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
| 262 | |
| 263 | # Prefix -I with $(srctree) if it is not an absolute path. |
| 264 | # skip if -I has no parameter |
| 265 | addtree = $(if $(patsubst -I%,%,$(1)), \ |
| 266 | $(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1))) |
| 267 | |
| 268 | # Find all -I options and call addtree |
| 269 | flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) |
| 270 | |
| 271 | # echo command. |
| 272 | # Short version is used, if $(quiet) equals `quiet_', otherwise full one. |
| 273 | echo-cmd = $(if $($(quiet)cmd_$(1)),\ |
| 274 | echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) |
| 275 | |
| 276 | # printing commands |
| 277 | cmd = @$(echo-cmd) $(cmd_$(1)) |
| 278 | |
| 279 | # Add $(obj)/ for paths that are not absolute |
| 280 | objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) |
| 281 | |
| 282 | ### |
| 283 | # if_changed - execute command if any prerequisite is newer than |
| 284 | # target, or command line has changed |
| 285 | # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies |
| 286 | # including used config symbols |
| 287 | # if_changed_rule - as if_changed but execute rule instead |
| 288 | # See Documentation/kbuild/makefiles.txt for more info |
| 289 | |
| 290 | ifneq ($(KBUILD_NOCMDDEP),1) |
| 291 | # Check if both arguments are the same including their order. Result is empty |
| 292 | # string if equal. User may override this check using make KBUILD_NOCMDDEP=1 |
| 293 | arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \ |
| 294 | $(subst $(space),$(space_escape),$(strip $(cmd_$1)))) |
| 295 | else |
| 296 | arg-check = $(if $(strip $(cmd_$@)),,1) |
| 297 | endif |
| 298 | |
| 299 | # Replace >$< with >$$< to preserve $ when reloading the .cmd file |
| 300 | # (needed for make) |
| 301 | # Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file |
| 302 | # (needed for make) |
| 303 | # Replace >'< with >'\''< to be able to enclose the whole string in '...' |
| 304 | # (needed for the shell) |
| 305 | make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))) |
| 306 | |
| 307 | # Find any prerequisites that is newer than target or that does not exist. |
| 308 | # PHONY targets skipped in both cases. |
| 309 | any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^) |
| 310 | |
| 311 | # Execute command if command has changed or prerequisite(s) are updated. |
| 312 | # |
| 313 | if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ |
| 314 | @set -e; \ |
| 315 | $(echo-cmd) $(cmd_$(1)); \ |
| 316 | printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) |
| 317 | |
| 318 | # Execute the command and also postprocess generated .d dependencies file. |
| 319 | if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ |
| 320 | @set -e; \ |
| 321 | $(cmd_and_fixdep), @:) |
| 322 | |
| 323 | ifndef CONFIG_TRIM_UNUSED_KSYMS |
| 324 | |
| 325 | cmd_and_fixdep = \ |
| 326 | $(echo-cmd) $(cmd_$(1)); \ |
| 327 | scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\ |
| 328 | rm -f $(depfile); \ |
| 329 | mv -f $(dot-target).tmp $(dot-target).cmd; |
| 330 | |
| 331 | else |
| 332 | |
| 333 | # Filter out exported kernel symbol names from the preprocessor output. |
| 334 | # See also __KSYM_DEPS__ in include/linux/export.h. |
| 335 | # We disable the depfile generation here, so as not to overwrite the existing |
| 336 | # depfile while fixdep is parsing it. |
| 337 | flags_nodeps = $(filter-out -Wp$(comma)-M%, $($(1))) |
| 338 | ksym_dep_filter = \ |
| 339 | case "$(1)" in \ |
| 340 | cc_*_c|cpp_i_c) \ |
| 341 | $(CPP) $(call flags_nodeps,c_flags) -D__KSYM_DEPS__ $< ;; \ |
| 342 | as_*_S|cpp_s_S) \ |
| 343 | $(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;; \ |
| 344 | boot*|build*|*cpp_lds_S|dtc|host*|vdso*) : ;; \ |
| 345 | *) echo "Don't know how to preprocess $(1)" >&2; false ;; \ |
| 346 | esac | tr ";" "\n" | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p' |
| 347 | |
| 348 | cmd_and_fixdep = \ |
| 349 | $(echo-cmd) $(cmd_$(1)); \ |
| 350 | $(ksym_dep_filter) | \ |
| 351 | scripts/basic/fixdep -e $(depfile) $@ '$(make-cmd)' \ |
| 352 | > $(dot-target).tmp; \ |
| 353 | rm -f $(depfile); \ |
| 354 | mv -f $(dot-target).tmp $(dot-target).cmd; |
| 355 | |
| 356 | endif |
| 357 | |
| 358 | # Usage: $(call if_changed_rule,foo) |
| 359 | # Will check if $(cmd_foo) or any of the prerequisites changed, |
| 360 | # and if so will execute $(rule_foo). |
| 361 | if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \ |
| 362 | @set -e; \ |
| 363 | $(rule_$(1)), @:) |
| 364 | |
| 365 | ### |
| 366 | # why - tell why a a target got build |
| 367 | # enabled by make V=2 |
| 368 | # Output (listed in the order they are checked): |
| 369 | # (1) - due to target is PHONY |
| 370 | # (2) - due to target missing |
| 371 | # (3) - due to: file1.h file2.h |
| 372 | # (4) - due to command line change |
| 373 | # (5) - due to missing .cmd file |
| 374 | # (6) - due to target not in $(targets) |
| 375 | # (1) PHONY targets are always build |
| 376 | # (2) No target, so we better build it |
| 377 | # (3) Prerequisite is newer than target |
| 378 | # (4) The command line stored in the file named dir/.target.cmd |
| 379 | # differed from actual command line. This happens when compiler |
| 380 | # options changes |
| 381 | # (5) No dir/.target.cmd file (used to store command line) |
| 382 | # (6) No dir/.target.cmd file and target not listed in $(targets) |
| 383 | # This is a good hint that there is a bug in the kbuild file |
| 384 | ifeq ($(KBUILD_VERBOSE),2) |
| 385 | why = \ |
| 386 | $(if $(filter $@, $(PHONY)),- due to target is PHONY, \ |
| 387 | $(if $(wildcard $@), \ |
| 388 | $(if $(strip $(any-prereq)),- due to: $(any-prereq), \ |
| 389 | $(if $(arg-check), \ |
| 390 | $(if $(cmd_$@),- due to command line change, \ |
| 391 | $(if $(filter $@, $(targets)), \ |
| 392 | - due to missing .cmd file, \ |
| 393 | - due to $(notdir $@) not in $$(targets) \ |
| 394 | ) \ |
| 395 | ) \ |
| 396 | ) \ |
| 397 | ), \ |
| 398 | - due to target missing \ |
| 399 | ) \ |
| 400 | ) |
| 401 | |
| 402 | echo-why = $(call escsq, $(strip $(why))) |
| 403 | endif |
| 404 | |
| 405 | ############################################################################### |
| 406 | # |
| 407 | # When a Kconfig string contains a filename, it is suitable for |
| 408 | # passing to shell commands. It is surrounded by double-quotes, and |
| 409 | # any double-quotes or backslashes within it are escaped by |
| 410 | # backslashes. |
| 411 | # |
| 412 | # This is no use for dependencies or $(wildcard). We need to strip the |
| 413 | # surrounding quotes and the escaping from quotes and backslashes, and |
| 414 | # we *do* need to escape any spaces in the string. So, for example: |
| 415 | # |
| 416 | # Usage: $(eval $(call config_filename,FOO)) |
| 417 | # |
| 418 | # Defines FOO_FILENAME based on the contents of the CONFIG_FOO option, |
| 419 | # transformed as described above to be suitable for use within the |
| 420 | # makefile. |
| 421 | # |
| 422 | # Also, if the filename is a relative filename and exists in the source |
| 423 | # tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to |
| 424 | # be prefixed to *both* command invocation and dependencies. |
| 425 | # |
| 426 | # Note: We also print the filenames in the quiet_cmd_foo text, and |
| 427 | # perhaps ought to have a version specially escaped for that purpose. |
| 428 | # But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good |
| 429 | # enough. It'll strip the quotes in the common case where there's no |
| 430 | # space and it's a simple filename, and it'll retain the quotes when |
| 431 | # there's a space. There are some esoteric cases in which it'll print |
| 432 | # the wrong thing, but we don't really care. The actual dependencies |
| 433 | # and commands *do* get it right, with various combinations of single |
| 434 | # and double quotes, backslashes and spaces in the filenames. |
| 435 | # |
| 436 | ############################################################################### |
| 437 | # |
| 438 | define config_filename |
| 439 | ifneq ($$(CONFIG_$(1)),"") |
| 440 | $(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1))))))) |
| 441 | ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME))) |
| 442 | else |
| 443 | ifeq ($$(wildcard $$($(1)_FILENAME)),) |
| 444 | ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),) |
| 445 | $(1)_SRCPREFIX := $(srctree)/ |
| 446 | endif |
| 447 | endif |
| 448 | endif |
| 449 | endif |
| 450 | endef |
| 451 | # |
| 452 | ############################################################################### |
| 453 | |
| 454 | # delete partially updated (i.e. corrupted) files on error |
| 455 | .DELETE_ON_ERROR: |
| 456 |