1# SPDX-License-Identifier: GPL-2.0 2# Backward compatibility 3asflags-y += $(EXTRA_AFLAGS) 4ccflags-y += $(EXTRA_CFLAGS) 5cppflags-y += $(EXTRA_CPPFLAGS) 6ldflags-y += $(EXTRA_LDFLAGS) 7ifneq ($(always),) 8$(warning 'always' is deprecated. Please use 'always-y' instead) 9always-y += $(always) 10endif 11ifneq ($(hostprogs-y),) 12$(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead) 13hostprogs += $(hostprogs-y) 14endif 15ifneq ($(hostprogs-m),) 16$(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead) 17hostprogs += $(hostprogs-m) 18endif 19 20# flags that take effect in current and sub directories 21KBUILD_AFLAGS += $(subdir-asflags-y) 22KBUILD_CFLAGS += $(subdir-ccflags-y) 23 24# Figure out what we need to build from the various variables 25# =========================================================================== 26 27# When an object is listed to be built compiled-in and modular, 28# only build the compiled-in version 29obj-m := $(filter-out $(obj-y),$(obj-m)) 30 31# Libraries are always collected in one lib file. 32# Filter out objects already built-in 33lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) 34 35# Subdirectories we need to descend into 36subdir-ym := $(sort $(subdir-y) $(subdir-m) \ 37 $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m)))) 38 39# Handle objects in subdirs: 40# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and 41# foo/modules.order 42# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order 43# 44# Generate modules.order to determine modorder. Unfortunately, we don't have 45# information about ordering between -y and -m subdirs. Just put -y's first. 46 47ifdef need-modorder 48obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m)) 49else 50obj-m := $(filter-out %/, $(obj-m)) 51endif 52 53ifdef need-builtin 54obj-y := $(patsubst %/, %/built-in.a, $(obj-y)) 55else 56obj-y := $(filter-out %/, $(obj-y)) 57endif 58 59# Expand $(foo-objs) $(foo-y) by calling $(call suffix-search,foo.o,-objs -y) 60suffix-search = $(foreach s,$(2),$($(1:.o=$s))) 61# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object 62# Do this recursively to find nested composite objects. 63# foo-y may contain foo.o bar.o . For backwards compatibility, don't treat this 64# foo.o as a nested object 65multi-search = $(sort $(foreach m,$(1),$(if $(strip $(call suffix-search,$(m),$(2) -)),\ 66 $(if $(filter $(m),$(strip $(call suffix-search,$(m),$(2) -))),,\ 67 $(m) $(call multi-search,$(call suffix-search,$(m),$(2)),$(2)))))) 68multi-used-y := $(call multi-search,$(obj-y),-objs -y) 69multi-used-m := $(call multi-search,$(obj-m),-objs -y -m) 70multi-used := $(multi-used-y) $(multi-used-m) 71 72# Replace multi-part objects by their individual parts, 73# including built-in.a from subdirectories 74# Recursively search for real files. For backwards compatibility, 75# foo-y may contain foo.o bar.o . foo.o in this context is a real object, and 76# shouldn't be recursed into. 77real-search = $(foreach m,$(1), $(if $(strip $(call suffix-search,$(m),$(2) -)), \ 78 $(filter $(m),$(call suffix-search,$(m),$(2))) $(call real-search,$(filter-out $(m),$(call suffix-search,$(m),$(2))),$(2)),\ 79 $(m))) 80real-obj-y := $(call real-search, $(obj-y),-objs -y) 81real-obj-m := $(call real-search, $(obj-m),-objs -y -m) 82 83always-y += $(always-m) 84 85# hostprogs-always-y += foo 86# ... is a shorthand for 87# hostprogs += foo 88# always-y += foo 89hostprogs += $(hostprogs-always-y) $(hostprogs-always-m) 90always-y += $(hostprogs-always-y) $(hostprogs-always-m) 91 92# userprogs-always-y is likewise. 93userprogs += $(userprogs-always-y) $(userprogs-always-m) 94always-y += $(userprogs-always-y) $(userprogs-always-m) 95 96# DTB 97# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built 98extra-y += $(dtb-y) 99extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-) 100 101ifneq ($(CHECK_DTBS),) 102extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y)) 103extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-)) 104endif 105 106# Add subdir path 107 108extra-y := $(addprefix $(obj)/,$(extra-y)) 109always-y := $(addprefix $(obj)/,$(always-y)) 110targets := $(addprefix $(obj)/,$(targets)) 111obj-m := $(addprefix $(obj)/,$(obj-m)) 112lib-y := $(addprefix $(obj)/,$(lib-y)) 113real-obj-y := $(addprefix $(obj)/,$(real-obj-y)) 114real-obj-m := $(addprefix $(obj)/,$(real-obj-m)) 115multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) 116subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) 117 118# Finds the multi-part object the current object will be linked into. 119# If the object belongs to two or more multi-part objects, list them all. 120modname-multi = $(sort $(foreach m,$(multi-used),\ 121 $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=)))) 122 123__modname = $(if $(modname-multi),$(modname-multi),$(basetarget)) 124 125modname = $(subst $(space),:,$(__modname)) 126modfile = $(addprefix $(obj)/,$(__modname)) 127 128# target with $(obj)/ and its suffix stripped 129target-stem = $(basename $(patsubst $(obj)/%,%,$@)) 130 131# These flags are needed for modversions and compiling, so we define them here 132# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will 133# end up in (or would, if it gets compiled in) 134name-fix-token = $(subst $(comma),_,$(subst -,_,$1)) 135name-fix = $(call stringify,$(call name-fix-token,$1)) 136basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) 137modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) \ 138 -D__KBUILD_MODNAME=kmod_$(call name-fix-token,$(modname)) 139modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile)) 140 141_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \ 142 $(filter-out $(ccflags-remove-y), \ 143 $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \ 144 $(CFLAGS_$(target-stem).o)) 145_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \ 146 $(filter-out $(asflags-remove-y), \ 147 $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \ 148 $(AFLAGS_$(target-stem).o)) 149_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds) 150 151# 152# Enable gcov profiling flags for a file, directory or for all files depending 153# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL 154# (in this order) 155# 156ifeq ($(CONFIG_GCOV_KERNEL),y) 157_c_flags += $(if $(patsubst n%,, \ 158 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ 159 $(CFLAGS_GCOV)) 160endif 161 162# 163# Enable address sanitizer flags for kernel except some files or directories 164# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) 165# 166ifeq ($(CONFIG_KASAN),y) 167ifneq ($(CONFIG_KASAN_HW_TAGS),y) 168_c_flags += $(if $(patsubst n%,, \ 169 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ 170 $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) 171endif 172endif 173 174ifeq ($(CONFIG_UBSAN),y) 175_c_flags += $(if $(patsubst n%,, \ 176 $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ 177 $(CFLAGS_UBSAN)) 178endif 179 180ifeq ($(CONFIG_KCOV),y) 181_c_flags += $(if $(patsubst n%,, \ 182 $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \ 183 $(CFLAGS_KCOV)) 184endif 185 186# 187# Enable KCSAN flags except some files or directories we don't want to check 188# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE) 189# 190ifeq ($(CONFIG_KCSAN),y) 191_c_flags += $(if $(patsubst n%,, \ 192 $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \ 193 $(CFLAGS_KCSAN)) 194endif 195 196# $(srctree)/$(src) for including checkin headers from generated source files 197# $(objtree)/$(obj) for including generated headers from checkin source files 198ifeq ($(KBUILD_EXTMOD),) 199ifdef building_out_of_srctree 200_c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) 201_a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) 202_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj) 203endif 204endif 205 206part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y) 207quiet_modtag = $(if $(part-of-module),[M], ) 208 209modkern_cflags = \ 210 $(if $(part-of-module), \ 211 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ 212 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags)) 213 214modkern_aflags = $(if $(part-of-module), \ 215 $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \ 216 $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)) 217 218c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ 219 -include $(srctree)/include/linux/compiler_types.h \ 220 $(_c_flags) $(modkern_cflags) \ 221 $(basename_flags) $(modname_flags) 222 223a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ 224 $(_a_flags) $(modkern_aflags) 225 226cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ 227 $(_cpp_flags) 228 229ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) 230 231DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes 232 233dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \ 234 $(addprefix -I,$(DTC_INCLUDE)) \ 235 -undef -D__DTS__ 236 237# Objtool arguments are also needed for modfinal with LTO, so we define 238# then here to avoid duplication. 239objtool_args = \ 240 $(if $(CONFIG_UNWINDER_ORC),orc generate,check) \ 241 $(if $(part-of-module), --module,) \ 242 $(if $(CONFIG_FRAME_POINTER),, --no-fp) \ 243 $(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), \ 244 --no-unreachable,) \ 245 $(if $(CONFIG_RETPOLINE), --retpoline,) \ 246 $(if $(CONFIG_RETHUNK), --rethunk,) \ 247 $(if $(CONFIG_X86_SMAP), --uaccess,) \ 248 $(if $(CONFIG_SLS), --sls,) \ 249 $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,) 250 251# Useful for describing the dependency of composite objects 252# Usage: 253# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) 254define multi_depend 255$(foreach m, $(notdir $1), \ 256 $(eval $(obj)/$m: \ 257 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) 258endef 259 260quiet_cmd_copy = COPY $@ 261 cmd_copy = cp $< $@ 262 263# Shipped files 264# =========================================================================== 265 266quiet_cmd_shipped = SHIPPED $@ 267cmd_shipped = cat $< > $@ 268 269$(obj)/%: $(src)/%_shipped 270 $(call cmd,shipped) 271 272# Commands useful for building a boot image 273# =========================================================================== 274# 275# Use as following: 276# 277# target: source(s) FORCE 278# $(if_changed,ld/objcopy/gzip) 279# 280# and add target to extra-y so that we know we have to 281# read in the saved command line 282 283# Linking 284# --------------------------------------------------------------------------- 285 286quiet_cmd_ld = LD $@ 287 cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@ 288 289# Archive 290# --------------------------------------------------------------------------- 291 292quiet_cmd_ar = AR $@ 293 cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs) 294 295# Objcopy 296# --------------------------------------------------------------------------- 297 298quiet_cmd_objcopy = OBJCOPY $@ 299cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ 300 301# Gzip 302# --------------------------------------------------------------------------- 303 304quiet_cmd_gzip = GZIP $@ 305 cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@ 306 307# DTC 308# --------------------------------------------------------------------------- 309ifeq ("$(origin DTC)", "command line") 310PHONY += $(DTC) 311dtc-option = $(call try-run, $(DTC) $1 -v,$1) 312else 313# Just add the flag. DTC is compiled later as a prerequisite, so there's no dtc 314# to test the flag against. This is okay because we're not testing flags which 315# aren't supported by in-kernel dtc to begin with. 316dtc-option = $1 317endif 318 319DTC ?= $(objtree)/scripts/dtc/dtc 320DTC_FLAGS += $(call dtc-option,-Wno-interrupt_provider) 321 322# Disable noisy checks by default 323ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) 324DTC_FLAGS += $(call dtc-option,-Wno-unit_address_vs_reg) \ 325 $(call dtc-option,-Wno-unit_address_format) \ 326 $(call dtc-option,-Wno-avoid_unnecessary_addr_size) \ 327 $(call dtc-option,-Wno-alias_paths) \ 328 $(call dtc-option,-Wno-graph_child_address) \ 329 $(call dtc-option,-Wno-simple_bus_reg) \ 330 $(call dtc-option,-Wno-unique_unit_address) \ 331 $(call dtc-option,-Wno-pci_device_reg) 332endif 333 334ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) 335DTC_FLAGS += $(call dtc-option,-Wnode_name_chars_strict) \ 336 $(call dtc-option,-Wproperty_name_chars_strict) \ 337 $(call dtc-option,-Winterrupt_provider) 338endif 339 340DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) 341 342# Generate an assembly file to wrap the output of the device tree compiler 343quiet_cmd_dt_S_dtb= DTB $@ 344cmd_dt_S_dtb= \ 345{ \ 346 echo '\#include <asm-generic/vmlinux.lds.h>'; \ 347 echo '.section .dtb.init.rodata,"a"'; \ 348 echo '.balign STRUCT_ALIGNMENT'; \ 349 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ 350 echo '__dtb_$(subst -,_,$(*F))_begin:'; \ 351 echo '.incbin "$<" '; \ 352 echo '__dtb_$(subst -,_,$(*F))_end:'; \ 353 echo '.global __dtb_$(subst -,_,$(*F))_end'; \ 354 echo '.balign STRUCT_ALIGNMENT'; \ 355} > $@ 356 357$(obj)/%.dtb.S: $(obj)/%.dtb FORCE 358 $(call if_changed,dt_S_dtb) 359 360quiet_cmd_dtc = DTC $@ 361cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ 362 $(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \ 363 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ 364 -d $(depfile).dtc.tmp $(dtc-tmp) ; \ 365 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 366 367$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE 368 $(call if_changed_dep,dtc) 369 370DT_CHECKER ?= dt-validate 371DT_BINDING_DIR := Documentation/devicetree/bindings 372# DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile 373DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.json 374 375quiet_cmd_dtb_check = CHECK $@ 376 cmd_dtb_check = $(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ 377 378define rule_dtc 379 $(call cmd_and_fixdep,dtc) 380 $(call cmd,dtb_check) 381endef 382 383$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE 384 $(call if_changed_rule,dtc,yaml) 385 386dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) 387 388# Bzip2 389# --------------------------------------------------------------------------- 390 391# Bzip2 and LZMA do not include size in file... so we have to fake that; 392# append the size as a 32-bit littleendian number as gzip does. 393size_append = printf $(shell \ 394dec_size=0; \ 395for F in $(real-prereqs); do \ 396 fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \ 397 dec_size=$$(expr $$dec_size + $$fsize); \ 398done; \ 399printf "%08x\n" $$dec_size | \ 400 sed 's/\(..\)/\1 /g' | { \ 401 read ch0 ch1 ch2 ch3; \ 402 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ 403 printf '%s%03o' '\\' $$((0x$$ch)); \ 404 done; \ 405 } \ 406) 407 408quiet_cmd_bzip2 = BZIP2 $@ 409 cmd_bzip2 = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@ 410 411# Lzma 412# --------------------------------------------------------------------------- 413 414quiet_cmd_lzma = LZMA $@ 415 cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@ 416 417quiet_cmd_lzo = LZO $@ 418 cmd_lzo = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@ 419 420quiet_cmd_lz4 = LZ4 $@ 421 cmd_lz4 = { cat $(real-prereqs) | \ 422 $(LZ4) -l -12 --favor-decSpeed stdin stdout; \ 423 $(size_append); } > $@ 424 425# U-Boot mkimage 426# --------------------------------------------------------------------------- 427 428MKIMAGE := $(srctree)/scripts/mkuboot.sh 429 430# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces 431# the number of overrides in arch makefiles 432UIMAGE_ARCH ?= $(SRCARCH) 433UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) 434UIMAGE_OPTS-y ?= 435UIMAGE_TYPE ?= kernel 436UIMAGE_LOADADDR ?= arch_must_set_this 437UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) 438UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' 439 440quiet_cmd_uimage = UIMAGE $@ 441 cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ 442 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ 443 -T $(UIMAGE_TYPE) \ 444 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ 445 -n $(UIMAGE_NAME) -d $< $@ 446 447# XZ 448# --------------------------------------------------------------------------- 449# Use xzkern to compress the kernel image and xzmisc to compress other things. 450# 451# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage 452# of the kernel decompressor. A BCJ filter is used if it is available for 453# the target architecture. xzkern also appends uncompressed size of the data 454# using size_append. The .xz format has the size information available at 455# the end of the file too, but it's in more complex format and it's good to 456# avoid changing the part of the boot code that reads the uncompressed size. 457# Note that the bytes added by size_append will make the xz tool think that 458# the file is corrupt. This is expected. 459# 460# xzmisc doesn't use size_append, so it can be used to create normal .xz 461# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very 462# big dictionary would increase the memory usage too much in the multi-call 463# decompression mode. A BCJ filter isn't used either. 464quiet_cmd_xzkern = XZKERN $@ 465 cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \ 466 $(size_append); } > $@ 467 468quiet_cmd_xzmisc = XZMISC $@ 469 cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@ 470 471# ZSTD 472# --------------------------------------------------------------------------- 473# Appends the uncompressed size of the data using size_append. The .zst 474# format has the size information available at the beginning of the file too, 475# but it's in a more complex format and it's good to avoid changing the part 476# of the boot code that reads the uncompressed size. 477# 478# Note that the bytes added by size_append will make the zstd tool think that 479# the file is corrupt. This is expected. 480# 481# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of 482# 128 MB. zstd22 is used for kernel compression because it is decompressed in a 483# single pass, so zstd doesn't need to allocate a window buffer. When streaming 484# decompression is used, like initramfs decompression, zstd22 should likely not 485# be used because it would require zstd to allocate a 128 MB buffer. 486 487quiet_cmd_zstd = ZSTD $@ 488 cmd_zstd = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@ 489 490quiet_cmd_zstd22 = ZSTD22 $@ 491 cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@ 492 493# ASM offsets 494# --------------------------------------------------------------------------- 495 496# Default sed regexp - multiline due to syntax constraints 497# 498# Use [:space:] because LLVM's integrated assembler inserts <tab> around 499# the .ascii directive whereas GCC keeps the <space> as-is. 500define sed-offsets 501 's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \ 502 /^->/{s:->#\(.*\):/* \1 */:; \ 503 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ 504 s:->::; p;}' 505endef 506 507# Use filechk to avoid rebuilds when a header changes, but the resulting file 508# does not 509define filechk_offsets 510 echo "#ifndef $2"; \ 511 echo "#define $2"; \ 512 echo "/*"; \ 513 echo " * DO NOT MODIFY."; \ 514 echo " *"; \ 515 echo " * This file was generated by Kbuild"; \ 516 echo " */"; \ 517 echo ""; \ 518 sed -ne $(sed-offsets) < $<; \ 519 echo ""; \ 520 echo "#endif" 521endef 522