endif

objtree := .

VPATH :=

ifeq ($(KBUILD_EXTMOD),)

ifdef building_out_of_srctree

VPATH := $(srctree)

endif

endif

export building_out_of_srctree srctree objtree VPATH

ifdef CONFIG_LTO_CLANG

ifdef CONFIG_LTO_CLANG_THIN

CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit

KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache

else

CC_FLAGS_LTO := -flto

endif

echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)

endef

$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)

$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)

$(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0)

$(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0)

$(version_h): FORCE

$(call filechk,version.h)

endif

ifneq ($(CHECK_DTBS),)

dtbs_prepare: dt_binding_check

dtbs_prepare: dt_binding_schemas

endif

dtbs_check: dtbs

$(Q)$(MAKE) $(build)=scripts/dtc

ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)

export CHECK_DT_BINDING=y

export CHECK_DTBS=y

endif

PHONY += dt_binding_check

dt_binding_check: scripts_dtc

PHONY += dt_binding_check dt_binding_schemas

dt_binding_check: dt_binding_schemas scripts_dtc

$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@

dt_binding_schemas:

$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings

PHONY += dt_compatible_check

dt_compatible_check: dt_binding_check

dt_compatible_check: dt_binding_schemas

$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@

# ---------------------------------------------------------------------------

# Directories & files removed with 'make clean'

CLEAN_FILES += vmlinux.symvers modules-only.symvers \

modules.builtin modules.builtin.modinfo modules.nsdeps \

compile_commands.json .thinlto-cache rust/test \

compile_commands.json rust/test \

rust-project.json .vmlinux.objs .vmlinux.export.c

# Directories & files removed with 'make mrproper'

# clean - Delete most, but leave enough to build external modules

#

clean: rm-files := $(CLEAN_FILES)

clean: private rm-files := $(CLEAN_FILES)

PHONY += archclean vmlinuxclean

# mrproper - Delete all generated files, including .config

#

mrproper: rm-files := $(wildcard $(MRPROPER_FILES))

mrproper: private rm-files := $(MRPROPER_FILES)

mrproper-dirs := $(addprefix _mrproper_,scripts)

PHONY += $(mrproper-dirs) mrproper

@echo ''

@$(if $(dtstree), \

echo 'Devicetree:'; \

echo '* dtbs - Build device tree blobs for enabled boards'; \

echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \

echo ' dt_binding_check - Validate device tree binding documents'; \

echo ' dtbs_check - Validate device tree source files';\

echo '* dtbs - Build device tree blobs for enabled boards'; \

echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \

echo ' dt_binding_check - Validate device tree binding documents and examples'; \

echo ' dt_binding_schema - Build processed device tree binding schemas'; \

echo ' dtbs_check - Validate device tree source files';\

echo '')

@echo 'Userspace tools targets:'

PHONY += compile_commands.json

clean-dirs := $(KBUILD_EXTMOD)

clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \

$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache

clean: private rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \

$(KBUILD_EXTMOD)/compile_commands.json

PHONY += prepare

# now expand this into a simple variable to reduce the cost of shell evaluations