kbuild: move kbuild syntax processing to scripts/Makefile.build

include $(kbuild-file)

include $(srctree)/scripts/Makefile.lib

# flags that take effect in current and sub directories

KBUILD_AFLAGS += $(subdir-asflags-y)

KBUILD_CFLAGS += $(subdir-ccflags-y)

KBUILD_RUSTFLAGS += $(subdir-rustflags-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

# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals

suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))

# List composite targets that are constructed by combining other targets

multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))

# List primitive targets that are compiled from source files

real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))

# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object

multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y)

multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m)

multi-obj-ym := $(multi-obj-y) $(multi-obj-m)

# Replace multi-part objects by their individual parts,

# including built-in.a from subdirectories

real-obj-y := $(call real-search, $(obj-y), .o, -objs -y)

real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -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)

# Add subdir path

ifneq ($(obj),.)

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-obj-m	:= $(addprefix $(obj)/, $(multi-obj-m))

subdir-ym	:= $(addprefix $(obj)/, $(subdir-ym))

endif

ifndef obj

$(warning kbuild: Makefile.build is included improperly)

endif

# SPDX-License-Identifier: GPL-2.0

# flags that take effect in current and sub directories

KBUILD_AFLAGS += $(subdir-asflags-y)

KBUILD_CFLAGS += $(subdir-ccflags-y)

KBUILD_RUSTFLAGS += $(subdir-rustflags-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

# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals

suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))

# List composite targets that are constructed by combining other targets

multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))

# List primitive targets that are compiled from source files

real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))

# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object

multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y)

multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m)

multi-obj-ym := $(multi-obj-y) $(multi-obj-m)

# Replace multi-part objects by their individual parts,

# including built-in.a from subdirectories

real-obj-y := $(call real-search, $(obj-y), .o, -objs -y)

real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -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)

# Add subdir path

ifneq ($(obj),.)

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-obj-m	:= $(addprefix $(obj)/, $(multi-obj-m))

subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))

endif

# 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-obj-ym),\