# ==========================================================================# Installing headers## All headers under include/uapi, include/generated/uapi,# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are# exported.# They are preprocessed to remove __KERNEL__ section of the file.## ========================================================================== # generated header directorygen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj))) # Kbuild file is optionalkbuild-file := $(srctree)/$(obj)/Kbuild-include $(kbuild-file) # called may set destination dir (when installing to asm/)_dst := $(if $(dst),$(dst),$(obj)) old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuildifneq ($(wildcard $(old-kbuild-file)),)include $(old-kbuild-file)endif include scripts/Kbuild.include installdir    := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst)) srcdir        := $(srctree)/$(obj)gendir        := $(objtree)/$(gen)subdirs       := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.))header-files  := $(notdir $(wildcard $(srcdir)/*.h))header-files  += $(notdir $(wildcard $(srcdir)/*.agh))header-files  := $(filter-out $(no-export-headers), $(header-files))genhdr-files  := $(notdir $(wildcard $(gendir)/*.h))genhdr-files  := $(filter-out $(header-files), $(genhdr-files)) # files used to track state of install/checkinstall-file  := $(installdir)/.installcheck-file    := $(installdir)/.check # generic-y list all files an architecture uses from asm-generic# Use this to build a list of headers which require a wrappergeneric-files := $(notdir $(wildcard $(srctree)/include/uapi/asm-generic/*.h))wrapper-files := $(filter $(generic-files), $(generic-y))wrapper-files := $(filter-out $(header-files), $(wrapper-files)) # all headers files for this dirall-files     := $(header-files) $(genhdr-files) $(wrapper-files)output-files  := $(addprefix $(installdir)/, $(all-files)) ifneq ($(mandatory-y),)missing       := $(filter-out $(all-files),$(mandatory-y))ifneq ($(missing),)$(error Some mandatory headers ($(missing)) are missing in $(obj))endifendif # Work out what needs to be removedoldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))unwanted      := $(filter-out $(all-files),$(oldheaders)) # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)unwanted-file := $(addprefix $(installdir)/, $(unwanted)) printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\                            file$(if $(word 2, $(all-files)),s))      cmd_install = \        $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \        $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \        for F in $(wrapper-files); do                                   \                echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \        done;                                                           \        touch $@ quiet_cmd_remove = REMOVE  $(unwanted)      cmd_remove = rm -f $(unwanted-file) quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)# Headers list can be pretty long, xargs helps to avoid# the "Argument list too long" error.      cmd_check = for f in $(all-files); do                          \                  echo "$(installdir)/$${f}"; done                      \                  | xargs                                            \                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \	          touch $@ PHONY += __headersinst __headerscheck ifndef HDRCHECK# Rules for installing headers__headersinst: $(subdirs) $(install-file)	@: targets += $(install-file)$(install-file): scripts/headers_install.sh \		 $(addprefix $(srcdir)/,$(header-files)) \		 $(addprefix $(gendir)/,$(genhdr-files)) FORCE	$(if $(unwanted),$(call cmd,remove),)	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))	$(call if_changed,install) else__headerscheck: $(subdirs) $(check-file)	@: targets += $(check-file)$(check-file): scripts/headers_check.pl $(output-files) FORCE	$(call if_changed,check) endif # Recursion.PHONY: $(subdirs)$(subdirs):	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@ targets := $(wildcard $(sort $(targets)))cmd_files := $(wildcard \             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) ifneq ($(cmd_files),)	include $(cmd_files)endif .PHONY: $(PHONY)PHONY += FORCEFORCE: ;