scripts/Makefile.lib - kernel/msm-5.4 - Gitiles

 # Backward compatibility
 asflags-y  += $(EXTRA_AFLAGS)
 ccflags-y  += $(EXTRA_CFLAGS)
 cppflags-y += $(EXTRA_CPPFLAGS)
 ldflags-y  += $(EXTRA_LDFLAGS)

 #
 # flags that take effect in sub directories
 export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
 export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(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)))


 # Handle objects in subdirs
 # ---------------------------------------------------------------------------
 # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
 #   and add the directory to the list of dirs to descend into: $(subdir-y)
 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
 #   and add the directory to the list of dirs to descend into: $(subdir-m)

 # Determine modorder.
 # Unfortunately, we don't have information about ordering between -y
 # and -m subdirs.  Just put -y's first.
 modorder	:= $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))

 __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y	+= $(__subdir-y)
 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
 subdir-m	+= $(__subdir-m)
 obj-y		:= $(patsubst %/, %/built-in.o, $(obj-y))
 obj-m		:= $(filter-out %/, $(obj-m))

 # Subdirectories we need to descend into

 subdir-ym	:= $(sort $(subdir-y) $(subdir-m))

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

 # Build list of the parts of our composite objects, our composite
 # objects depend on those (obviously)
 multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
 multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
 multi-objs   := $(multi-objs-y) $(multi-objs-m)

 # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
 # tell kbuild to descend
 subdir-obj-y := $(filter %/built-in.o, $(obj-y))

 # $(obj-dirs) is a list of directories that contain object files
 obj-dirs := $(dir $(multi-objs) $(obj-y))

 # Replace multi-part objects by their individual parts, look at local dir only
 real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
 real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))

 # Add subdir path

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

 # These flags are needed for modversions and compiling, so we define them here
 # already
 # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
 # end up in (or would, if it gets compiled in)
 # Note: Files that end up in two or more modules are compiled without the
 #       KBUILD_MODNAME definition. The reason is that any made-up name would
 #       differ in different configs.
 name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
 modname_flags  = $(if $(filter 1,$(words $(modname))),\
                  -DKBUILD_MODNAME=$(call name-fix,$(modname)))

 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
                  $(asflags-y) $(AFLAGS_$(basetarget).o)
 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))

 #
 # 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)
 _c_flags += $(if $(patsubst n%,, \
 		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
 		$(CFLAGS_KASAN))
 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)y), \
 	$(CFLAGS_KCOV))
 endif

 # If building the kernel in a separate objtree expand all occurrences
 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').

 ifeq ($(KBUILD_SRC),)
 __c_flags	= $(_c_flags)
 __a_flags	= $(_a_flags)
 __cpp_flags     = $(_cpp_flags)
 else

 # -I$(obj) locates generated .h files
 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
 #   and locates generated .h files
 # FIXME: Replace both with specific CFLAGS* statements in the makefiles
 __c_flags	= $(if $(obj),-I$(srctree)/$(src) -I$(obj)) \
 		  $(call flags,_c_flags)
 __a_flags	= $(call flags,_a_flags)
 __cpp_flags     = $(call flags,_cpp_flags)
 endif

 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 		 $(__c_flags) $(modkern_cflags)                           \
 		 $(basename_flags) $(modname_flags)

 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 		 $(__a_flags) $(modkern_aflags)

 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
 		 $(__cpp_flags)

 ld_flags       = $(LDFLAGS) $(ldflags-y)

 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
 		 -I$(srctree)/drivers/of/testcase-data                   \
 		 -undef -D__DTS__

 # Finds the multi-part object the current object will be linked into
 modname-multi = $(sort $(foreach m,$(multi-used),\
 		$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))

 # 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

 ifdef REGENERATE_PARSERS

 # GPERF
 # ---------------------------------------------------------------------------
 quiet_cmd_gperf = GPERF $@
       cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<

 .PRECIOUS: $(src)/%.hash.c_shipped
 $(src)/%.hash.c_shipped: $(src)/%.gperf
 	$(call cmd,gperf)

 # LEX
 # ---------------------------------------------------------------------------
 LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)

 quiet_cmd_flex = LEX     $@
       cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<

 .PRECIOUS: $(src)/%.lex.c_shipped
 $(src)/%.lex.c_shipped: $(src)/%.l
 	$(call cmd,flex)

 # YACC
 # ---------------------------------------------------------------------------
 YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)

 quiet_cmd_bison = YACC    $@
       cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<

 .PRECIOUS: $(src)/%.tab.c_shipped
 $(src)/%.tab.c_shipped: $(src)/%.y
 	$(call cmd,bison)

 quiet_cmd_bison_h = YACC    $@
       cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<

 .PRECIOUS: $(src)/%.tab.h_shipped
 $(src)/%.tab.h_shipped: $(src)/%.y
 	$(call cmd,bison_h)

 endif

 # 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) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
 	       $(filter-out FORCE,$^) -o $@

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

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

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

 quiet_cmd_gzip = GZIP    $@
 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
 	(rm -f $@ ; false)

 # DTC
 # ---------------------------------------------------------------------------
 DTC ?= $(objtree)/scripts/dtc/dtc

 # Disable noisy checks by default
 ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
 DTC_FLAGS += -Wno-unit_address_vs_reg
 endif

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

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

 quiet_cmd_dtc = DTC     $@
 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 	$(DTC) -O dtb -o $@ -b 0 \
 		-i $(dir $<) $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)

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

 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 $1; do								\
 	fsize=$$(stat -c "%s" $$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 $(filter-out FORCE,$^) | \
 	bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)

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

 quiet_cmd_lzma = LZMA    $@
 cmd_lzma = (cat $(filter-out FORCE,$^) | \
 	lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)

 quiet_cmd_lzo = LZO     $@
 cmd_lzo = (cat $(filter-out FORCE,$^) | \
 	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)

 quiet_cmd_lz4 = LZ4     $@
 cmd_lz4 = (cat $(filter-out FORCE,$^) | \
 	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)

 # 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)'
 UIMAGE_IN ?= $<
 UIMAGE_OUT ?= $@

 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
       cmd_uimage = $(CONFIG_SHELL) $(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 $(UIMAGE_IN) $(UIMAGE_OUT)

 # 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 $(filter-out FORCE,$^) | \
 	sh $(srctree)/scripts/xz_wrap.sh && \
 	$(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)

 quiet_cmd_xzmisc = XZMISC  $@
 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
 	xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
 	(rm -f $@ ; false)
	# Backward compatibility
	asflags-y += $(EXTRA_AFLAGS)
	ccflags-y += $(EXTRA_CFLAGS)
	cppflags-y += $(EXTRA_CPPFLAGS)
	ldflags-y += $(EXTRA_LDFLAGS)

	#
	# flags that take effect in sub directories
	export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
	export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(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)))


	# Handle objects in subdirs
	# ---------------------------------------------------------------------------
	# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
	# and add the directory to the list of dirs to descend into: $(subdir-y)
	# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
	# and add the directory to the list of dirs to descend into: $(subdir-m)

	# Determine modorder.
	# Unfortunately, we don't have information about ordering between -y
	# and -m subdirs. Just put -y's first.
	modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))

	__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
	subdir-y += $(__subdir-y)
	__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
	subdir-m += $(__subdir-m)
	obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
	obj-m := $(filter-out %/, $(obj-m))

	# Subdirectories we need to descend into

	subdir-ym := $(sort $(subdir-y) $(subdir-m))

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

	# Build list of the parts of our composite objects, our composite
	# objects depend on those (obviously)
	multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
	multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
	multi-objs := $(multi-objs-y) $(multi-objs-m)

	# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
	# tell kbuild to descend
	subdir-obj-y := $(filter %/built-in.o, $(obj-y))

	# $(obj-dirs) is a list of directories that contain object files
	obj-dirs := $(dir $(multi-objs) $(obj-y))

	# Replace multi-part objects by their individual parts, look at local dir only
	real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
	real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))

	# Add subdir path

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

	# These flags are needed for modversions and compiling, so we define them here
	# already
	# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
	# end up in (or would, if it gets compiled in)
	# Note: Files that end up in two or more modules are compiled without the
	# KBUILD_MODNAME definition. The reason is that any made-up name would
	# differ in different configs.
	name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
	basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
	modname_flags = $(if $(filter 1,$(words $(modname))),\
	-DKBUILD_MODNAME=$(call name-fix,$(modname)))

	orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
	$(ccflags-y) $(CFLAGS_$(basetarget).o)
	_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
	orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
	$(asflags-y) $(AFLAGS_$(basetarget).o)
	_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
	_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))

	#
	# 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)
	_c_flags += $(if $(patsubst n%,, \
	$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
	$(CFLAGS_KASAN))
	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)y), \
	$(CFLAGS_KCOV))
	endif

	# If building the kernel in a separate objtree expand all occurrences
	# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').

	ifeq ($(KBUILD_SRC),)
	__c_flags = $(_c_flags)
	__a_flags = $(_a_flags)
	__cpp_flags = $(_cpp_flags)
	else

	# -I$(obj) locates generated .h files
	# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
	# and locates generated .h files
	# FIXME: Replace both with specific CFLAGS* statements in the makefiles
	__c_flags = $(if $(obj),-I$(srctree)/$(src) -I$(obj)) \
	$(call flags,_c_flags)
	__a_flags = $(call flags,_a_flags)
	__cpp_flags = $(call flags,_cpp_flags)
	endif

	c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
	$(__c_flags) $(modkern_cflags) \
	$(basename_flags) $(modname_flags)

	a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
	$(__a_flags) $(modkern_aflags)

	cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
	$(__cpp_flags)

	ld_flags = $(LDFLAGS) $(ldflags-y)

	dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
	-I$(srctree)/arch/$(SRCARCH)/boot/dts \
	-I$(srctree)/arch/$(SRCARCH)/boot/dts/include \
	-I$(srctree)/drivers/of/testcase-data \
	-undef -D__DTS__

	# Finds the multi-part object the current object will be linked into
	modname-multi = $(sort $(foreach m,$(multi-used),\
	$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))

	# 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

	ifdef REGENERATE_PARSERS

	# GPERF
	# ---------------------------------------------------------------------------
	quiet_cmd_gperf = GPERF $@
	cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<

	.PRECIOUS: $(src)/%.hash.c_shipped
	$(src)/%.hash.c_shipped: $(src)/%.gperf
	$(call cmd,gperf)

	# LEX
	# ---------------------------------------------------------------------------
	LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)

	quiet_cmd_flex = LEX $@
	cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<

	.PRECIOUS: $(src)/%.lex.c_shipped
	$(src)/%.lex.c_shipped: $(src)/%.l
	$(call cmd,flex)

	# YACC
	# ---------------------------------------------------------------------------
	YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)

	quiet_cmd_bison = YACC $@
	cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<

	.PRECIOUS: $(src)/%.tab.c_shipped
	$(src)/%.tab.c_shipped: $(src)/%.y
	$(call cmd,bison)

	quiet_cmd_bison_h = YACC $@
	cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<

	.PRECIOUS: $(src)/%.tab.h_shipped
	$(src)/%.tab.h_shipped: $(src)/%.y
	$(call cmd,bison_h)

	endif

	# 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) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
	$(filter-out FORCE,$^) -o $@

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

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

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

	quiet_cmd_gzip = GZIP $@
	cmd_gzip = (cat $(filter-out FORCE,$^) \| gzip -n -f -9 > $@) \|\| \
	(rm -f $@ ; false)

	# DTC
	# ---------------------------------------------------------------------------
	DTC ?= $(objtree)/scripts/dtc/dtc

	# Disable noisy checks by default
	ifeq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
	DTC_FLAGS += -Wno-unit_address_vs_reg
	endif

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

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

	quiet_cmd_dtc = DTC $@
	cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
	$(DTC) -O dtb -o $@ -b 0 \
	-i $(dir $<) $(DTC_FLAGS) \
	-d $(depfile).dtc.tmp $(dtc-tmp) ; \
	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)

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

	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 $1; do \
	fsize=$$(stat -c "%s" $$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 $(filter-out FORCE,$^) \| \
	bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ \|\| \
	(rm -f $@ ; false)

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

	quiet_cmd_lzma = LZMA $@
	cmd_lzma = (cat $(filter-out FORCE,$^) \| \
	lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ \|\| \
	(rm -f $@ ; false)

	quiet_cmd_lzo = LZO $@
	cmd_lzo = (cat $(filter-out FORCE,$^) \| \
	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ \|\| \
	(rm -f $@ ; false)

	quiet_cmd_lz4 = LZ4 $@
	cmd_lz4 = (cat $(filter-out FORCE,$^) \| \
	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ \|\| \
	(rm -f $@ ; false)

	# 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)'
	UIMAGE_IN ?= $<
	UIMAGE_OUT ?= $@

	quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT)
	cmd_uimage = $(CONFIG_SHELL) $(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 $(UIMAGE_IN) $(UIMAGE_OUT)

	# 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 $(filter-out FORCE,$^) \| \
	sh $(srctree)/scripts/xz_wrap.sh && \
	$(call size_append, $(filter-out FORCE,$^))) > $@ \|\| \
	(rm -f $@ ; false)

	quiet_cmd_xzmisc = XZMISC $@
	cmd_xzmisc = (cat $(filter-out FORCE,$^) \| \
	xz --check=crc32 --lzma2=dict=1MiB) > $@ \|\| \
	(rm -f $@ ; false)