# ========================================================================== # 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 # # ========================================================================== # generated header directory gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj))) kbuild-file := $(srctree)/$(obj)/Kbuild include $(kbuild-file) # called may set destination dir (when installing to asm/) _dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj))) 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-files1 := $(foreach hdr, $(header-y), \ $(if $(wildcard $(srcdir)/$(hdr)), \ $(wildcard $(srcdir)/$(hdr))) \ ) input-files1-name := $(notdir $(input-files1)) input-files2 := $(foreach hdr, $(header-y), \ $(if $(wildcard $(srcdir)/$(hdr)),, \ $(if $(wildcard $(oldsrcdir)/$(hdr)), \ $(wildcard $(oldsrcdir)/$(hdr)), \ $(error Missing UAPI file $(srcdir)/$(hdr))) \ )) input-files2-name := $(notdir $(input-files2)) input-files3 := $(foreach hdr, $(genhdr-y), \ $(if $(wildcard $(gendir)/$(hdr)), \ $(wildcard $(gendir)/$(hdr)), \ $(error Missing generated UAPI file $(gendir)/$(hdr)) \ )) input-files3-name := $(notdir $(input-files3)) # 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 = \ $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \ $(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \ $(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \ for F in $(wrapper-files); do \ echo "\#include " > $(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 $(input-files1) $(input-files2) $(input-files3) 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: ;