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

# Installing headers

#

# header-y - list files to be installed. They are preprocessed

# to remove __KERNEL__ section of the file

# genhdr-y - Same as header-y but in a generated/ directory

#

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

# called may set destination dir (when installing to asm/)

_dst := $(or $(destination-y),$(dst),$(obj))

# generated header directory

gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))

kbuild-file := $(srctree)/$(obj)/Kbuild

include $(kbuild-file)

old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild

ifneq ($(wildcard $(old-kbuild-file)),)

include $(old-kbuild-file)

endif

include scripts/Kbuild.include

installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))

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

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

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

# files used to track state of install/check

install-file := $(installdir)/.install

check-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 wrapper

wrapper-files := $(filter $(header-y), $(generic-y))

srcdir := $(srctree)/$(obj)

gendir := $(objtree)/$(gen)

oldsrcdir := $(srctree)/$(subst /uapi,,$(obj))

# all headers files for this dir

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

all-files := $(header-y) $(genhdr-y) $(wrapper-files)

output-files := $(addprefix $(installdir)/, $(all-files))

input-files := $(foreach hdr, $(header-y), \

$(or \

$(wildcard $(srcdir)/$(hdr)), \

$(wildcard $(oldsrcdir)/$(hdr)), \

$(error Missing UAPI file $(srcdir)/$(hdr)) \

)) \

$(foreach hdr, $(genhdr-y), \

$(or \

$(wildcard $(gendir)/$(hdr)), \

$(error Missing generated UAPI file $(gendir)/$(hdr)) \

))

# Work out what needs to be removed

oldheaders := $(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 = \

$(PERL) $< $(installdir) $(SRCARCH) $(input-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.pl $(input-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

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

.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 += FORCE

FORCE: ;