[mirror_ubuntu-jammy-kernel.git] / scripts / Makefile.lib

# SPDX-License-Identifier: GPL-2.0
# Backward compatibility
asflags-y  += $(EXTRA_AFLAGS)
ccflags-y  += $(EXTRA_CFLAGS)
cppflags-y += $(EXTRA_CPPFLAGS)
ldflags-y  += $(EXTRA_LDFLAGS)
ifneq ($(always),)
$(warning 'always' is deprecated. Please use 'always-y' instead)
always-y   += $(always)
endif
ifneq ($(hostprogs-y),)
$(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead)
hostprogs  += $(hostprogs-y)
endif
ifneq ($(hostprogs-m),)
$(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead)
hostprogs  += $(hostprogs-m)
endif

# flags that take effect in current and sub directories
KBUILD_AFLAGS += $(subdir-asflags-y)
KBUILD_CFLAGS += $(subdir-ccflags-y)

# Figure out what we need to build from the various variables
# ===========================================================================

# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))

# Libraries are always collected in one lib file.
# Filter out objects already built-in
lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))

# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m) \
			$(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))

# Handle objects in subdirs:
# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
#   foo/modules.order
# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
#
# Generate modules.order to determine modorder. Unfortunately, we don't have
# information about ordering between -y and -m subdirs. Just put -y's first.

ifdef need-modorder
obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
else
obj-m := $(filter-out %/, $(obj-m))
endif

ifdef need-builtin
obj-y		:= $(patsubst %/, %/built-in.a, $(obj-y))
else
obj-y		:= $(filter-out %/, $(obj-y))
endif

# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m))))
multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))
multi-used   := $(multi-used-y) $(multi-used-m)

# Replace multi-part objects by their individual parts,
# including built-in.a from subdirectories
real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))

always-y += $(always-m)

# hostprogs-always-y += foo
# ... is a shorthand for
# hostprogs += foo
# always-y  += foo
hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
always-y += $(hostprogs-always-y) $(hostprogs-always-m)

# userprogs-always-y is likewise.
userprogs += $(userprogs-always-y) $(userprogs-always-m)
always-y += $(userprogs-always-y) $(userprogs-always-m)

# DTB
# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
extra-y				+= $(dtb-y)
extra-$(CONFIG_OF_ALL_DTBS)	+= $(dtb-)

ifneq ($(CHECK_DTBS),)
extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y))
extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
endif

# Add subdir path

extra-y		:= $(addprefix $(obj)/,$(extra-y))
always-y	:= $(addprefix $(obj)/,$(always-y))
targets		:= $(addprefix $(obj)/,$(targets))
obj-m		:= $(addprefix $(obj)/,$(obj-m))
lib-y		:= $(addprefix $(obj)/,$(lib-y))
real-obj-y	:= $(addprefix $(obj)/,$(real-obj-y))
real-obj-m	:= $(addprefix $(obj)/,$(real-obj-m))
multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))

# Finds the multi-part object the current object will be linked into.
# If the object belongs to two or more multi-part objects, list them all.
modname-multi = $(sort $(foreach m,$(multi-used),\
		$(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=))))

__modname = $(if $(modname-multi),$(modname-multi),$(basetarget))

modname = $(subst $(space),:,$(__modname))
modfile = $(addprefix $(obj)/,$(__modname))

# target with $(obj)/ and its suffix stripped
target-stem = $(basename $(patsubst $(obj)/%,%,$@))

# These flags are needed for modversions and compiling, so we define them here
# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
# end up in (or would, if it gets compiled in)
name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
modname_flags  = -DKBUILD_MODNAME=$(call name-fix,$(modname))
modfile_flags  = -DKBUILD_MODFILE=$(call stringify,$(modfile))

_c_flags       = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
                     $(filter-out $(ccflags-remove-y), \
                         $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
                     $(CFLAGS_$(target-stem).o))
_a_flags       = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
                     $(filter-out $(asflags-remove-y), \
                         $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
                     $(AFLAGS_$(target-stem).o))
_cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)

#
# Enable gcov profiling flags for a file, directory or for all files depending
# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
# (in this order)
#
ifeq ($(CONFIG_GCOV_KERNEL),y)
_c_flags += $(if $(patsubst n%,, \
		$(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
		$(CFLAGS_GCOV))
endif

#
# Enable address sanitizer flags for kernel except some files or directories
# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
#
ifeq ($(CONFIG_KASAN),y)
ifneq ($(CONFIG_KASAN_HW_TAGS),y)
_c_flags += $(if $(patsubst n%,, \
		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
		$(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
endif
endif

ifeq ($(CONFIG_UBSAN),y)
_c_flags += $(if $(patsubst n%,, \
		$(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
		$(CFLAGS_UBSAN))
endif

ifeq ($(CONFIG_KCOV),y)
_c_flags += $(if $(patsubst n%,, \
	$(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
	$(CFLAGS_KCOV))
endif

#
# Enable KCSAN flags except some files or directories we don't want to check
# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
#
ifeq ($(CONFIG_KCSAN),y)
_c_flags += $(if $(patsubst n%,, \
	$(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \
	$(CFLAGS_KCSAN))
endif

# $(srctree)/$(src) for including checkin headers from generated source files
# $(objtree)/$(obj) for including generated headers from checkin source files
ifeq ($(KBUILD_EXTMOD),)
ifdef building_out_of_srctree
_c_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
_a_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
endif
endif

part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
quiet_modtag = $(if $(part-of-module),[M],   )

modkern_cflags =                                          \
	$(if $(part-of-module),                           \
		$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))

modkern_aflags = $(if $(part-of-module),				\
			$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE),	\
			$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))

c_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
		 -include $(srctree)/include/linux/compiler_types.h       \
		 $(_c_flags) $(modkern_cflags)                           \
		 $(basename_flags) $(modname_flags)

a_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
		 $(_a_flags) $(modkern_aflags)

cpp_flags      = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
		 $(_cpp_flags)

ld_flags       = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))

DTC_INCLUDE    := $(srctree)/scripts/dtc/include-prefixes

dtc_cpp_flags  = -Wp,-MMD,$(depfile).pre.tmp -nostdinc                    \
		 $(addprefix -I,$(DTC_INCLUDE))                          \
		 -undef -D__DTS__

# Useful for describing the dependency of composite objects
# Usage:
#   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
define multi_depend
$(foreach m, $(notdir $1), \
	$(eval $(obj)/$m: \
	$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
endef

quiet_cmd_copy = COPY    $@
      cmd_copy = cp $< $@

# Shipped files
# ===========================================================================

quiet_cmd_shipped = SHIPPED $@
cmd_shipped = cat $< > $@

$(obj)/%: $(src)/%_shipped
	$(call cmd,shipped)

# Commands useful for building a boot image
# ===========================================================================
#
#	Use as following:
#
#	target: source(s) FORCE
#		$(if_changed,ld/objcopy/gzip)
#
#	and add target to extra-y so that we know we have to
#	read in the saved command line

# Linking
# ---------------------------------------------------------------------------

quiet_cmd_ld = LD      $@
      cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@

# Archive
# ---------------------------------------------------------------------------

quiet_cmd_ar = AR      $@
      cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs)

# Objcopy
# ---------------------------------------------------------------------------

quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@

# Gzip
# ---------------------------------------------------------------------------

quiet_cmd_gzip = GZIP    $@
      cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@

# DTC
# ---------------------------------------------------------------------------
DTC ?= $(objtree)/scripts/dtc/dtc
DTC_FLAGS += -Wno-interrupt_provider

# Disable noisy checks by default
ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
DTC_FLAGS += -Wno-unit_address_vs_reg \
	-Wno-unit_address_format \
	-Wno-avoid_unnecessary_addr_size \
	-Wno-alias_paths \
	-Wno-graph_child_address \
	-Wno-simple_bus_reg \
	-Wno-unique_unit_address \
	-Wno-pci_device_reg
endif

ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
DTC_FLAGS += -Wnode_name_chars_strict \
	-Wproperty_name_chars_strict \
	-Winterrupt_provider
endif

DTC_FLAGS += $(DTC_FLAGS_$(basetarget))

# Generate an assembly file to wrap the output of the device tree compiler
quiet_cmd_dt_S_dtb= DTB     $@
cmd_dt_S_dtb=						\
{							\
	echo '\#include <asm-generic/vmlinux.lds.h>'; 	\
	echo '.section .dtb.init.rodata,"a"';		\
	echo '.balign STRUCT_ALIGNMENT';		\
	echo '.global __dtb_$(subst -,_,$(*F))_begin';	\
	echo '__dtb_$(subst -,_,$(*F))_begin:';		\
	echo '.incbin "$<" ';				\
	echo '__dtb_$(subst -,_,$(*F))_end:';		\
	echo '.global __dtb_$(subst -,_,$(*F))_end';	\
	echo '.balign STRUCT_ALIGNMENT'; 		\
} > $@

$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
	$(call if_changed,dt_S_dtb)

quiet_cmd_dtc = DTC     $@
cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
	$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
		$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)

$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
	$(call if_changed_dep,dtc)

DT_CHECKER ?= dt-validate
DT_BINDING_DIR := Documentation/devicetree/bindings
# DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile
DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.json

quiet_cmd_dtb_check =	CHECK   $@
      cmd_dtb_check =	$(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@

define rule_dtc
	$(call cmd_and_fixdep,dtc)
	$(call cmd,dtb_check)
endef

$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
	$(call if_changed_rule,dtc,yaml)

dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)

# Bzip2
# ---------------------------------------------------------------------------

# Bzip2 and LZMA do not include size in file... so we have to fake that;
# append the size as a 32-bit littleendian number as gzip does.
size_append = printf $(shell						\
dec_size=0;								\
for F in $(real-prereqs); do					\
	fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F);	\
	dec_size=$$(expr $$dec_size + $$fsize);				\
done;									\
printf "%08x\n" $$dec_size |						\
	sed 's/\(..\)/\1 /g' | {					\
		read ch0 ch1 ch2 ch3;					\
		for ch in $$ch3 $$ch2 $$ch1 $$ch0; do			\
			printf '%s%03o' '\\' $$((0x$$ch)); 		\
		done;							\
	}								\
)

quiet_cmd_bzip2 = BZIP2   $@
      cmd_bzip2 = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@

# Lzma
# ---------------------------------------------------------------------------

quiet_cmd_lzma = LZMA    $@
      cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@

quiet_cmd_lzo = LZO     $@
      cmd_lzo = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@

quiet_cmd_lz4 = LZ4     $@
      cmd_lz4 = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \
                  $(size_append); } > $@

# U-Boot mkimage
# ---------------------------------------------------------------------------

MKIMAGE := $(srctree)/scripts/mkuboot.sh

# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
# the number of overrides in arch makefiles
UIMAGE_ARCH ?= $(SRCARCH)
UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
UIMAGE_OPTS-y ?=
UIMAGE_TYPE ?= kernel
UIMAGE_LOADADDR ?= arch_must_set_this
UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'

quiet_cmd_uimage = UIMAGE  $@
      cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
			-C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
			-T $(UIMAGE_TYPE) \
			-a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
			-n $(UIMAGE_NAME) -d $< $@

# XZ
# ---------------------------------------------------------------------------
# Use xzkern to compress the kernel image and xzmisc to compress other things.
#
# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
# of the kernel decompressor. A BCJ filter is used if it is available for
# the target architecture. xzkern also appends uncompressed size of the data
# using size_append. The .xz format has the size information available at
# the end of the file too, but it's in more complex format and it's good to
# avoid changing the part of the boot code that reads the uncompressed size.
# Note that the bytes added by size_append will make the xz tool think that
# the file is corrupt. This is expected.
#
# xzmisc doesn't use size_append, so it can be used to create normal .xz
# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
# big dictionary would increase the memory usage too much in the multi-call
# decompression mode. A BCJ filter isn't used either.
quiet_cmd_xzkern = XZKERN  $@
      cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \
                     $(size_append); } > $@

quiet_cmd_xzmisc = XZMISC  $@
      cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@

# ZSTD
# ---------------------------------------------------------------------------
# Appends the uncompressed size of the data using size_append. The .zst
# format has the size information available at the beginning of the file too,
# but it's in a more complex format and it's good to avoid changing the part
# of the boot code that reads the uncompressed size.
#
# Note that the bytes added by size_append will make the zstd tool think that
# the file is corrupt. This is expected.
#
# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of
# 128 MB. zstd22 is used for kernel compression because it is decompressed in a
# single pass, so zstd doesn't need to allocate a window buffer. When streaming
# decompression is used, like initramfs decompression, zstd22 should likely not
# be used because it would require zstd to allocate a 128 MB buffer.

quiet_cmd_zstd = ZSTD    $@
      cmd_zstd = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@

quiet_cmd_zstd22 = ZSTD22  $@
      cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@

# ASM offsets
# ---------------------------------------------------------------------------

# Default sed regexp - multiline due to syntax constraints
#
# Use [:space:] because LLVM's integrated assembler inserts <tab> around
# the .ascii directive whereas GCC keeps the <space> as-is.
define sed-offsets
	's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
	/^->/{s:->#\(.*\):/* \1 */:; \
	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
	s:->::; p;}'
endef

# Use filechk to avoid rebuilds when a header changes, but the resulting file
# does not
define filechk_offsets
	 echo "#ifndef $2"; \
	 echo "#define $2"; \
	 echo "/*"; \
	 echo " * DO NOT MODIFY."; \
	 echo " *"; \
	 echo " * This file was generated by Kbuild"; \
	 echo " */"; \
	 echo ""; \
	 sed -ne $(sed-offsets) < $<; \
	 echo ""; \
	 echo "#endif"
endef
Commit	Line	Data
b2441318	1	# SPDX-License-Identifier: GPL-2.0
f77bf014 SR	2	# Backward compatibility
	3	asflags-y += $(EXTRA_AFLAGS)
	4	ccflags-y += $(EXTRA_CFLAGS)
	5	cppflags-y += $(EXTRA_CPPFLAGS)
	6	ldflags-y += $(EXTRA_LDFLAGS)
59721d4e MY	7	ifneq ($(always),)
59721d4e MY	8	$(warning 'always' is deprecated. Please use 'always-y' instead)
5f2fb52f	9	always-y += $(always)
59721d4e MY	10	endif
	11	ifneq ($(hostprogs-y),)
	12	$(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead)
	13	hostprogs += $(hostprogs-y)
	14	endif
	15	ifneq ($(hostprogs-m),)
	16	$(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead)
	17	hostprogs += $(hostprogs-m)
	18	endif
f77bf014	19
8fdc3fbb	20	# flags that take effect in current and sub directories
4e13d47c MY	21	KBUILD_AFLAGS += $(subdir-asflags-y)
4e13d47c MY	22	KBUILD_CFLAGS += $(subdir-ccflags-y)
720097d8	23
1da177e4 LT	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
1da177e4 LT	29	obj-m := $(filter-out $(obj-y),$(obj-m))
	30
	31	# Libraries are always collected in one lib file.
	32	# Filter out objects already built-in
1da177e4 LT	33	lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
1da177e4 LT	34
0a8820e7 MY	35	# Subdirectories we need to descend into
	36	subdir-ym := $(sort $(subdir-y) $(subdir-m) \
	37	$(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
	38
b2c88554 MY	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
	47	ifdef need-modorder
	48	obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
	49	else
	50	obj-m := $(filter-out %/, $(obj-m))
	51	endif
	52
56d58936	53	ifdef need-builtin
f49821ee	54	obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
56d58936 MY	55	else
	56	obj-y := $(filter-out %/, $(obj-y))
	57	endif
1da177e4	58
33e84f2e MY	59	# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
	60	multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m))))
	61	multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))
1da177e4	62	multi-used := $(multi-used-y) $(multi-used-m)
1da177e4	63
f98fe47c MY	64	# Replace multi-part objects by their individual parts,
f98fe47c MY	65	# including built-in.a from subdirectories
33e84f2e MY	66	real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
33e84f2e MY	67	real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
1da177e4	68
5f2fb52f MY	69	always-y += $(always-m)
5f2fb52f MY	70
faabed29 MY	71	# hostprogs-always-y += foo
	72	# ... is a shorthand for
	73	# hostprogs += foo
	74	# always-y += foo
	75	hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
	76	always-y += $(hostprogs-always-y) $(hostprogs-always-m)
	77
	78	# userprogs-always-y is likewise.
	79	userprogs += $(userprogs-always-y) $(userprogs-always-m)
	80	always-y += $(userprogs-always-y) $(userprogs-always-m)
	81
7e7962dd MY	82	# DTB
	83	# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
	84	extra-y += $(dtb-y)
	85	extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
	86
4f0e3a57 RH	87	ifneq ($(CHECK_DTBS),)
	88	extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y))
	89	extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
	90	endif
	91
1da177e4 LT	92	# Add subdir path
	93
	94	extra-y := $(addprefix $(obj)/,$(extra-y))
5f2fb52f	95	always-y := $(addprefix $(obj)/,$(always-y))
1da177e4	96	targets := $(addprefix $(obj)/,$(targets))
1da177e4 LT	97	obj-m := $(addprefix $(obj)/,$(obj-m))
1da177e4 LT	98	lib-y := $(addprefix $(obj)/,$(lib-y))
f5f33681 MY	99	real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
f5f33681 MY	100	real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
1da177e4	101	multi-used-m := $(addprefix $(obj)/,$(multi-used-m))
1da177e4	102	subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
1da177e4	103
c0152e9a	104	# Finds the multi-part object the current object will be linked into.
1664a377 MY	105	# If the object belongs to two or more multi-part objects, list them all.
	106	modname-multi = $(sort $(foreach m,$(multi-used),\
	107	$(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=))))
c0152e9a	108
1664a377 MY	109	__modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
	110
	111	modname = $(subst $(space),:,$(__modname))
	112	modfile = $(addprefix $(obj)/,$(__modname))
c0152e9a	113
54b8ae66 MY	114	# target with $(obj)/ and its suffix stripped
	115	target-stem = $(basename $(patsubst $(obj)/%,%,$@))
	116
1da177e4	117	# These flags are needed for modversions and compiling, so we define them here
8fdc3fbb	118	# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
1da177e4	119	# end up in (or would, if it gets compiled in)
7e826c44	120	name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
b42841b7	121	basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
aeacb019	122	modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname))
1664a377	123	modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile))
1da177e4	124
15d5761a MY	125	_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
	126	$(filter-out $(ccflags-remove-y), \
	127	$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
	128	$(CFLAGS_$(target-stem).o))
	129	_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
	130	$(filter-out $(asflags-remove-y), \
	131	$(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
	132	$(AFLAGS_$(target-stem).o))
54b8ae66	133	_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
1da177e4	134
2521f2c2 PO	135	#
	136	# Enable gcov profiling flags for a file, directory or for all files depending
	137	# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
	138	# (in this order)
	139	#
	140	ifeq ($(CONFIG_GCOV_KERNEL),y)
	141	_c_flags += $(if $(patsubst n%,, \
	142	$(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
	143	$(CFLAGS_GCOV))
	144	endif
	145
0b24becc AR	146	#
	147	# Enable address sanitizer flags for kernel except some files or directories
	148	# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
	149	#
	150	ifeq ($(CONFIG_KASAN),y)
0fea6e9a	151	ifneq ($(CONFIG_KASAN_HW_TAGS),y)
0b24becc AR	152	_c_flags += $(if $(patsubst n%,, \
0b24becc AR	153	$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
0e410e15	154	$(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
0b24becc	155	endif
0fea6e9a	156	endif
0b24becc	157
c6d30853 AR	158	ifeq ($(CONFIG_UBSAN),y)
	159	_c_flags += $(if $(patsubst n%,, \
	160	$(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
	161	$(CFLAGS_UBSAN))
	162	endif
	163
5c9a8750 DV	164	ifeq ($(CONFIG_KCOV),y)
5c9a8750 DV	165	_c_flags += $(if $(patsubst n%,, \
a4691dea	166	$(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
5c9a8750 DV	167	$(CFLAGS_KCOV))
	168	endif
	169
dfd402a4 ME	170	#
	171	# Enable KCSAN flags except some files or directories we don't want to check
	172	# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
	173	#
	174	ifeq ($(CONFIG_KCSAN),y)
	175	_c_flags += $(if $(patsubst n%,, \
	176	$(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \
	177	$(CFLAGS_KCSAN))
	178	endif
5c9a8750	179
cdd750bf MY	180	# $(srctree)/$(src) for including checkin headers from generated source files
cdd750bf MY	181	# $(objtree)/$(obj) for including generated headers from checkin source files
58156ba4	182	ifeq ($(KBUILD_EXTMOD),)
051f278e	183	ifdef building_out_of_srctree
cdd750bf MY	184	_c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
	185	_a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
	186	_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
1da177e4	187	endif
58156ba4	188	endif
1da177e4	189
eb27ea5c MY	190	part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
	191	quiet_modtag = $(if $(part-of-module),[M], )
	192
	193	modkern_cflags = \
	194	$(if $(part-of-module), \
	195	$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
1664a377	196	$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
eb27ea5c MY	197
	198	modkern_aflags = $(if $(part-of-module), \
	199	$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
	200	$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
	201
30a77297	202	c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
a95b37e2	203	-include $(srctree)/include/linux/compiler_types.h \
cdd750bf	204	$(_c_flags) $(modkern_cflags) \
b42841b7	205	$(basename_flags) $(modname_flags)
1da177e4	206
30a77297	207	a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
cdd750bf	208	$(_a_flags) $(modkern_aflags)
1da177e4	209
30a77297	210	cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
cdd750bf	211	$(_cpp_flags)
1da177e4	212
d503ac53	213	ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
1da177e4	214
50f9ddaf MY	215	DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
50f9ddaf MY	216
30a77297	217	dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \
50f9ddaf	218	$(addprefix -I,$(DTC_INCLUDE)) \
e570d7c1 SW	219	-undef -D__DTS__
e570d7c1 SW	220
c8589d1e MY	221	# Useful for describing the dependency of composite objects
	222	# Usage:
	223	# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
	224	define multi_depend
	225	$(foreach m, $(notdir $1), \
	226	$(eval $(obj)/$m: \
	227	$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
	228	endef
	229
dee9c0b5 MY	230	quiet_cmd_copy = COPY $@
	231	cmd_copy = cp $< $@
	232
1da177e4 LT	233	# Shipped files
	234	# ===========================================================================
	235
	236	quiet_cmd_shipped = SHIPPED $@
	237	cmd_shipped = cat $< > $@
	238
991d76c9	239	$(obj)/%: $(src)/%_shipped
1da177e4 LT	240	$(call cmd,shipped)
	241
	242	# Commands useful for building a boot image
	243	# ===========================================================================
38385f8f	244	#
1da177e4 LT	245	# Use as following:
	246	#
	247	# target: source(s) FORCE
	248	# $(if_changed,ld/objcopy/gzip)
	249	#
836caba7	250	# and add target to extra-y so that we know we have to
1da177e4 LT	251	# read in the saved command line
	252
	253	# Linking
	254	# ---------------------------------------------------------------------------
	255
	256	quiet_cmd_ld = LD $@
afa974b7	257	cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@
1da177e4	258
898f5a00 MY	259	# Archive
	260	# ---------------------------------------------------------------------------
	261
	262	quiet_cmd_ar = AR $@
13dc8c02	263	cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs)
898f5a00	264
1da177e4 LT	265	# Objcopy
	266	# ---------------------------------------------------------------------------
	267
	268	quiet_cmd_objcopy = OBJCOPY $@
	269	cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
	270
	271	# Gzip
	272	# ---------------------------------------------------------------------------
	273
	274	quiet_cmd_gzip = GZIP $@
e4a42c82	275	cmd_gzip = cat $(real-prereqs) \| $(KGZIP) -n -f -9 > $@
1da177e4	276
aab94339 DB	277	# DTC
aab94339 DB	278	# ---------------------------------------------------------------------------
6b22b3d1	279	DTC ?= $(objtree)/scripts/dtc/dtc
3eb619b2	280	DTC_FLAGS += -Wno-interrupt_provider
aab94339	281
bc553986	282	# Disable noisy checks by default
e27128db	283	ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
8654cb8d	284	DTC_FLAGS += -Wno-unit_address_vs_reg \
8654cb8d	285	-Wno-unit_address_format \
4fd98e37 RH	286	-Wno-avoid_unnecessary_addr_size \
4fd98e37 RH	287	-Wno-alias_paths \
74656b68	288	-Wno-graph_child_address \
70523a3c	289	-Wno-simple_bus_reg \
74656b68	290	-Wno-unique_unit_address \
8654cb8d	291	-Wno-pci_device_reg
bc553986 RH	292	endif
bc553986 RH	293
e27128db	294	ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
8654cb8d	295	DTC_FLAGS += -Wnode_name_chars_strict \
3eb619b2 RH	296	-Wproperty_name_chars_strict \
3eb619b2 RH	297	-Winterrupt_provider
bc553986 RH	298	endif
bc553986 RH	299
331f7416 FR	300	DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
331f7416 FR	301
aab94339	302	# Generate an assembly file to wrap the output of the device tree compiler
1c00a47e	303	quiet_cmd_dt_S_dtb= DTB $@
aab94339	304	cmd_dt_S_dtb= \
b79c6aa6	305	{ \
aab94339 DB	306	echo '\#include <asm-generic/vmlinux.lds.h>'; \
	307	echo '.section .dtb.init.rodata,"a"'; \
	308	echo '.balign STRUCT_ALIGNMENT'; \
55fe6da9 JH	309	echo '.global __dtb_$(subst -,_,$(*F))_begin'; \
55fe6da9 JH	310	echo '__dtb_$(subst -,_,$(*F))_begin:'; \
aab94339	311	echo '.incbin "$<" '; \
55fe6da9 JH	312	echo '__dtb_$(subst -,_,$(*F))_end:'; \
55fe6da9 JH	313	echo '.global __dtb_$(subst -,_,$(*F))_end'; \
aab94339	314	echo '.balign STRUCT_ALIGNMENT'; \
b79c6aa6	315	} > $@
aab94339	316
a7f92419 MY	317	$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
a7f92419 MY	318	$(call if_changed,dt_S_dtb)
aab94339 DB	319
aab94339 DB	320	quiet_cmd_dtc = DTC $@
dd7699e3	321	cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
78046fab	322	$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
50f9ddaf	323	$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
b0a4d8b3 IC	324	-d $(depfile).dtc.tmp $(dtc-tmp) ; \
b0a4d8b3 IC	325	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
1da177e4	326
b8fc5b21	327	$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
78046fab	328	$(call if_changed_dep,dtc)
4f0e3a57 RH	329
	330	DT_CHECKER ?= dt-validate
	331	DT_BINDING_DIR := Documentation/devicetree/bindings
2ba06cd8	332	# DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile
b8a49399	333	DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
4f0e3a57 RH	334
4f0e3a57 RH	335	quiet_cmd_dtb_check = CHECK $@
fd63fab4	336	cmd_dtb_check = $(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@
4f0e3a57	337
7a049605	338	define rule_dtc
78046fab	339	$(call cmd_and_fixdep,dtc)
f5688663	340	$(call cmd,dtb_check)
4f0e3a57 RH	341	endef
	342
	343	$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
3d4b2238	344	$(call if_changed_rule,dtc,yaml)
90b335fb	345
b0a4d8b3	346	dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
22435f38	347
bc22c17e AK	348	# Bzip2
	349	# ---------------------------------------------------------------------------
	350
d3dd3b5a PA	351	# Bzip2 and LZMA do not include size in file... so we have to fake that;
d3dd3b5a PA	352	# append the size as a 32-bit littleendian number as gzip does.
4a2ff67c	353	size_append = printf $(shell \
d3dd3b5a	354	dec_size=0; \
afa974b7	355	for F in $(real-prereqs); do \
a670b0b4	356	fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
d3dd3b5a PA	357	dec_size=$$(expr $$dec_size + $$fsize); \
d3dd3b5a PA	358	done; \
1373411a JN	359	printf "%08x\n" $$dec_size \| \
	360	sed 's/\(..\)/\1 /g' \| { \
	361	read ch0 ch1 ch2 ch3; \
	362	for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
	363	printf '%s%03o' '\\' $$((0x$$ch)); \
	364	done; \
	365	} \
d3dd3b5a PA	366	)
	367
	368	quiet_cmd_bzip2 = BZIP2 $@
e4a42c82	369	cmd_bzip2 = { cat $(real-prereqs) \| $(KBZIP2) -9; $(size_append); } > $@
bc22c17e AK	370
	371	# Lzma
	372	# ---------------------------------------------------------------------------
	373
	374	quiet_cmd_lzma = LZMA $@
8dfb61dc	375	cmd_lzma = { cat $(real-prereqs) \| $(LZMA) -9; $(size_append); } > $@
7dd65feb	376
2d74b2c6	377	quiet_cmd_lzo = LZO $@
e4a42c82	378	cmd_lzo = { cat $(real-prereqs) \| $(KLZOP) -9; $(size_append); } > $@
d61931d8	379
e76e1fdf	380	quiet_cmd_lz4 = LZ4 $@
8dfb61dc	381	cmd_lz4 = { cat $(real-prereqs) \| $(LZ4) -l -c1 stdin stdout; \
b79c6aa6	382	$(size_append); } > $@
e76e1fdf	383
e3393645 SW	384	# U-Boot mkimage
	385	# ---------------------------------------------------------------------------
	386
	387	MKIMAGE := $(srctree)/scripts/mkuboot.sh
	388
	389	# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
	390	# the number of overrides in arch makefiles
	391	UIMAGE_ARCH ?= $(SRCARCH)
	392	UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
	393	UIMAGE_OPTS-y ?=
	394	UIMAGE_TYPE ?= kernel
	395	UIMAGE_LOADADDR ?= arch_must_set_this
	396	UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
	397	UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
e3393645	398
786ac51a	399	quiet_cmd_uimage = UIMAGE $@
858805b3	400	cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
e3393645 SW	401	-C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
	402	-T $(UIMAGE_TYPE) \
	403	-a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
786ac51a	404	-n $(UIMAGE_NAME) -d $< $@
e3393645	405
24fa0402 LC	406	# XZ
	407	# ---------------------------------------------------------------------------
	408	# Use xzkern to compress the kernel image and xzmisc to compress other things.
	409	#
	410	# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
	411	# of the kernel decompressor. A BCJ filter is used if it is available for
	412	# the target architecture. xzkern also appends uncompressed size of the data
	413	# using size_append. The .xz format has the size information available at
	414	# the end of the file too, but it's in more complex format and it's good to
	415	# avoid changing the part of the boot code that reads the uncompressed size.
	416	# Note that the bytes added by size_append will make the xz tool think that
	417	# the file is corrupt. This is expected.
	418	#
	419	# xzmisc doesn't use size_append, so it can be used to create normal .xz
	420	# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
	421	# big dictionary would increase the memory usage too much in the multi-call
	422	# decompression mode. A BCJ filter isn't used either.
	423	quiet_cmd_xzkern = XZKERN $@
b956c7a6	424	cmd_xzkern = { cat $(real-prereqs) \| sh $(srctree)/scripts/xz_wrap.sh; \
b79c6aa6	425	$(size_append); } > $@
24fa0402 LC	426
24fa0402 LC	427	quiet_cmd_xzmisc = XZMISC $@
8dfb61dc	428	cmd_xzmisc = cat $(real-prereqs) \| $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
ebf003f0	429
48f7ddf7 NT	430	# ZSTD
	431	# ---------------------------------------------------------------------------
	432	# Appends the uncompressed size of the data using size_append. The .zst
	433	# format has the size information available at the beginning of the file too,
	434	# but it's in a more complex format and it's good to avoid changing the part
	435	# of the boot code that reads the uncompressed size.
	436	#
	437	# Note that the bytes added by size_append will make the zstd tool think that
	438	# the file is corrupt. This is expected.
	439	#
	440	# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of
	441	# 128 MB. zstd22 is used for kernel compression because it is decompressed in a
	442	# single pass, so zstd doesn't need to allocate a window buffer. When streaming
	443	# decompression is used, like initramfs decompression, zstd22 should likely not
	444	# be used because it would require zstd to allocate a 128 MB buffer.
	445
	446	quiet_cmd_zstd = ZSTD $@
	447	cmd_zstd = { cat $(real-prereqs) \| $(ZSTD) -19; $(size_append); } > $@
	448
	449	quiet_cmd_zstd22 = ZSTD22 $@
	450	cmd_zstd22 = { cat $(real-prereqs) \| $(ZSTD) -22 --ultra; $(size_append); } > $@
	451
ebf003f0 MK	452	# ASM offsets
	453	# ---------------------------------------------------------------------------
	454
	455	# Default sed regexp - multiline due to syntax constraints
cf0c3e68 JH	456	#
	457	# Use [:space:] because LLVM's integrated assembler inserts <tab> around
	458	# the .ascii directive whereas GCC keeps the <space> as-is.
ebf003f0	459	define sed-offsets
cf0c3e68 JH	460	's:^[[:space:]]\.ascii[[:space:]]"\(.\)".:\1:; \
cf0c3e68 JH	461	/^->/{s:->#\(.\):/ \1 */:; \
ebf003f0	462	s:^->\([^ ]\) [\$$#]\([^ ]\) \(.\):#define \1 \2 /* \3 */:; \
cf0c3e68	463	s:->::; p;}'
ebf003f0 MK	464	endef
	465
	466	# Use filechk to avoid rebuilds when a header changes, but the resulting file
	467	# does not
	468	define filechk_offsets
ebf003f0 MK	469	echo "#ifndef $2"; \
	470	echo "#define $2"; \
	471	echo "/*"; \
	472	echo " * DO NOT MODIFY."; \
	473	echo " *"; \
	474	echo " * This file was generated by Kbuild"; \
	475	echo " */"; \
	476	echo ""; \
43fee2b2	477	sed -ne $(sed-offsets) < $<; \
ebf003f0	478	echo ""; \
ad774086	479	echo "#endif"
ebf003f0	480	endef