1# ========================================================================== 2# Installing headers 3# 4# header-y - list files to be installed. They are preprocessed 5# to remove __KERNEL__ section of the file 6# genhdr-y - Same as header-y but in a generated/ directory 7# 8# ========================================================================== 9 10# generated header directory 11gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj))) 12 13kbuild-file := $(srctree)/$(obj)/Kbuild 14include $(kbuild-file) 15 16# called may set destination dir (when installing to asm/) 17_dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj))) 18 19old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild 20ifneq ($(wildcard $(old-kbuild-file)),) 21include $(old-kbuild-file) 22endif 23 24include scripts/Kbuild.include 25 26installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst)) 27 28header-y := $(sort $(header-y)) 29subdirs := $(patsubst %/,%,$(filter %/, $(header-y))) 30header-y := $(filter-out %/, $(header-y)) 31 32# files used to track state of install/check 33install-file := $(installdir)/.install 34check-file := $(installdir)/.check 35 36# generic-y list all files an architecture uses from asm-generic 37# Use this to build a list of headers which require a wrapper 38wrapper-files := $(filter $(header-y), $(generic-y)) 39 40srcdir := $(srctree)/$(obj) 41gendir := $(objtree)/$(gen) 42 43oldsrcdir := $(srctree)/$(subst /uapi,,$(obj)) 44 45# all headers files for this dir 46header-y := $(filter-out $(generic-y), $(header-y)) 47all-files := $(header-y) $(genhdr-y) $(wrapper-files) 48output-files := $(addprefix $(installdir)/, $(all-files)) 49 50input-files1 := $(foreach hdr, $(header-y), \ 51 $(if $(wildcard $(srcdir)/$(hdr)), \ 52 $(wildcard $(srcdir)/$(hdr))) \ 53 ) 54input-files1-name := $(notdir $(input-files1)) 55input-files2 := $(foreach hdr, $(header-y), \ 56 $(if $(wildcard $(srcdir)/$(hdr)),, \ 57 $(if $(wildcard $(oldsrcdir)/$(hdr)), \ 58 $(wildcard $(oldsrcdir)/$(hdr)), \ 59 $(error Missing UAPI file $(srcdir)/$(hdr))) \ 60 )) 61input-files2-name := $(notdir $(input-files2)) 62input-files3 := $(foreach hdr, $(genhdr-y), \ 63 $(if $(wildcard $(gendir)/$(hdr)), \ 64 $(wildcard $(gendir)/$(hdr)), \ 65 $(error Missing generated UAPI file $(gendir)/$(hdr)) \ 66 )) 67input-files3-name := $(notdir $(input-files3)) 68 69# Work out what needs to be removed 70oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) 71unwanted := $(filter-out $(all-files),$(oldheaders)) 72 73# Prefix unwanted with full paths to $(INSTALL_HDR_PATH) 74unwanted-file := $(addprefix $(installdir)/, $(unwanted)) 75 76printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) 77 78quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\ 79 file$(if $(word 2, $(all-files)),s)) 80 cmd_install = \ 81 $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \ 82 $(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \ 83 $(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \ 84 for F in $(wrapper-files); do \ 85 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \ 86 done; \ 87 touch $@ 88 89quiet_cmd_remove = REMOVE $(unwanted) 90 cmd_remove = rm -f $(unwanted-file) 91 92quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files) 93# Headers list can be pretty long, xargs helps to avoid 94# the "Argument list too long" error. 95 cmd_check = for f in $(all-files); do \ 96 echo "$(installdir)/$${f}"; done \ 97 | xargs \ 98 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \ 99 touch $@ 100 101PHONY += __headersinst __headerscheck 102 103ifndef HDRCHECK 104# Rules for installing headers 105__headersinst: $(subdirs) $(install-file) 106 @: 107 108targets += $(install-file) 109$(install-file): scripts/headers_install.sh $(input-files1) $(input-files2) $(input-files3) FORCE 110 $(if $(unwanted),$(call cmd,remove),) 111 $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@))) 112 $(call if_changed,install) 113 114else 115__headerscheck: $(subdirs) $(check-file) 116 @: 117 118targets += $(check-file) 119$(check-file): scripts/headers_check.pl $(output-files) FORCE 120 $(call if_changed,check) 121 122endif 123 124# Recursion 125hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 126.PHONY: $(subdirs) 127$(subdirs): 128 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@ 129 130targets := $(wildcard $(sort $(targets))) 131cmd_files := $(wildcard \ 132 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 133 134ifneq ($(cmd_files),) 135 include $(cmd_files) 136endif 137 138.PHONY: $(PHONY) 139PHONY += FORCE 140FORCE: ; 141