Basic implementation of 'make headers_install'

depend dep:

	@echo '*** Warning: make $@ is unnecessary now.'

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

# Kernel headers

INSTALL_HDR_PATH=$(MODLIB)/abi

export INSTALL_HDR_PATH

PHONY += headers_install

headers_install: include/linux/version.h

	$(Q)unifdef -Ux /dev/null

	$(Q)rm -rf $(INSTALL_HDR_PATH)/include

	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include

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

# Modules

	@echo  '  cscope	  - Generate cscope index'

	@echo  '  kernelrelease	  - Output the release version string'

	@echo  '  kernelversion	  - Output the version stored in Makefile'

	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'

	@echo  '                    (default: /lib/modules/$$VERSION/abi)'

	@echo  ''

	@echo  'Static analysers'

	@echo  '  checkstack      - Generate a list of stack hogs'

# ==========================================================================

# Installing headers

#

# header-y files will be installed verbatim

# unifdef-y are the files where unifdef will be run before installing files

# objhdr-y are generated files that will be installed verbatim

#

# ==========================================================================

UNIFDEF := unifdef -U__KERNEL__

# Eliminate the contents of (and inclusions of) compiler.h

HDRSED  := sed 	-e "s/ inline / __inline__ /g" \

		-e "s/[[:space:]]__user[[:space:]]\+/ /g" \

		-e "s/(__user[[:space:]]\+/ (/g" \

		-e "s/[[:space:]]__force[[:space:]]\+/ /g" \

		-e "s/(__force[[:space:]]\+/ (/g" \

		-e "s/[[:space:]]__iomem[[:space:]]\+/ /g" \

		-e "s/(__iomem[[:space:]]\+/ (/g" \

		-e "s/[[:space:]]__attribute_const__[[:space:]]\+/\ /g" \

		-e "s/[[:space:]]__attribute_const__$$//" \

		-e "/^\#include <linux\/compiler.h>/d"

_dst := $(if $(dst),$(dst),$(obj))

.PHONY: __headersinst

__headersinst:

ifeq (,$(patsubst include/asm/%,,$(obj)/))

# For producing the generated stuff in include/asm for biarch builds, include

# both sets of Kbuild files; we'll generate anything which is mentioned in

# _either_ arch, and recurse into subdirectories which are mentioned in either

# arch. Since some directories may exist in one but not the other, we must

# use '-include'.

GENASM := 1

archasm	   := $(subst include/asm,asm-$(ARCH),$(obj))

altarchasm := $(subst include/asm,asm-$(ALTARCH),$(obj))

-include $(srctree)/include/$(archasm)/Kbuild

-include $(srctree)/include/$(altarchasm)/Kbuild

else

include $(srctree)/$(obj)/Kbuild

endif

include scripts/Kbuild.include

# If this is include/asm-$(ARCH) and there's no $(ALTARCH), then

# override $(_dst) so that we install to include/asm directly.

ifeq ($(obj)$(ALTARCH),include/asm-$(ARCH))

     _dst := include/asm

endif

header-y	:= $(sort $(header-y))

unifdef-y	:= $(sort $(unifdef-y))

subdir-y	:= $(patsubst %/,%,$(filter %/, $(header-y)))

header-y	:= $(filter-out %/, $(header-y))

header-y	:= $(filter-out $(unifdef-y),$(header-y))

ifdef ALTARCH

ifeq ($(obj),include/asm-$(ARCH))

altarch-y	:= altarch-dir

endif

endif

# Make the definitions visible for recursive make invocations

export ALTARCH

export ARCHDEF

export ALTARCHDEF

quiet_cmd_o_hdr_install   = INSTALL $(_dst)/$@

      cmd_o_hdr_install   = cp $(objtree)/$(obj)/$@ $(INSTALL_HDR_PATH)/$(_dst)

quiet_cmd_headers_install = INSTALL $(_dst)/$@

      cmd_headers_install = $(HDRSED) $(srctree)/$(obj)/$@		\

			    > $(INSTALL_HDR_PATH)/$(_dst)/$@

quiet_cmd_unifdef	  = UNIFDEF $(_dst)/$@

      cmd_unifdef	  = $(UNIFDEF) $(srctree)/$(obj)/$@ | $(HDRSED)	\

                            > $(INSTALL_HDR_PATH)/$(_dst)/$@ || :

quiet_cmd_mkdir		  = MKDIR   $@

      cmd_mkdir		  = mkdir -p $(INSTALL_HDR_PATH)/$@

quiet_cmd_gen		  = GEN     $(_dst)/$@

      cmd_gen		  = \

STUBDEF=__ASM_STUB_`echo $@ | tr a-z. A-Z_`;				\

(echo "/* File autogenerated by 'make headers_install' */" ;		\

echo "\#ifndef $$STUBDEF" ;						\

echo "\#define $$STUBDEF" ;						\

echo "\# if $(ARCHDEF)" ;						\

if [ -r $(srctree)/include/$(archasm)/$@ ]; then			\

	echo "\#  include <$(archasm)/$@>" ;				\

else									\

	echo "\#  error $(archasm)/$@ does not exist in"		\

			"the $(ARCH) architecture" ;			\

fi ;									\

echo "\# elif $(ALTARCHDEF)" ;						\

if [ -r $(srctree)/include/$(altarchasm)/$@ ]; then			\

	echo "\#  include <$(altarchasm)/$@>" ;				\

else									\

	echo "\#  error $(altarchasm)/$@ does not exist in"		\

			"the $(ALTARCH) architecture" ;			\

fi ;									\

echo "\# else" ;							\

echo "\#  warning This machine appears to be"				\

		 "neither $(ARCH) nor $(ALTARCH)." ;			\

echo "\# endif" ;							\

echo "\#endif /* $$STUBDEF */" ;					\

) > $(INSTALL_HDR_PATH)/$(_dst)/$@

__headersinst: $(subdir-y) $(header-y) $(unifdef-y) $(altarch-y) $(objhdr-y)

.PHONY: $(header-y) $(unifdef-y) $(subdir-y)

# Rules for installing headers

$(objhdr-y) $(subdir-y) $(header-y) $(unifdef-y): $(_dst)

.PHONY: $(_dst)

$(_dst):

	$(call cmd,mkdir)

ifdef GENASM

$(objhdr-y) $(header-y) $(unifdef-y):

	$(call cmd,gen)

else

$(objhdr-y):

	$(call cmd,o_hdr_install)

$(header-y):

	$(call cmd,headers_install)

$(unifdef-y):

	$(call cmd,unifdef)

endif

hdrinst := -rR -f $(srctree)/scripts/Makefile.headersinst obj

.PHONY: altarch-dir

altarch-dir:

	$(Q)$(MAKE) $(hdrinst)=include/asm-$(ALTARCH) dst=include/asm-$(ALTARCH)

	$(Q)$(MAKE) $(hdrinst)=include/asm dst=include/asm

# Recursion

$(subdir-y):

	$(Q)$(MAKE) $(hdrinst)=$(obj)/$@ dst=$(_dst)/$@ rel=../$(rel)