LXR linux/scripts/Makefile.headersinst

   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# unifdef-y - Same as header-y. Obsolete
   7# objhdr-y  - Same as header-y but for generated files
   8#
   9# ==========================================================================
  10
  11# called may set destination dir (when installing to asm/)
  12_dst := $(if $(dst),$(dst),$(obj))
  13
  14kbuild-file := $(srctree)/$(obj)/Kbuild
  15include $(kbuild-file)
  16
  17_dst := $(if $(destination-y),$(destination-y),$(_dst))
  18
  19include scripts/Kbuild.include
  20
  21install       := $(INSTALL_HDR_PATH)/$(_dst)
  22
  23header-y      := $(sort $(header-y) $(unifdef-y))
  24subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
  25header-y      := $(filter-out %/, $(header-y))
  26
  27# files used to track state of install/check
  28install-file  := $(install)/.install
  29check-file    := $(install)/.check
  30
  31# all headers files for this dir
  32all-files     := $(header-y) $(objhdr-y)
  33input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
  34                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y))
  35output-files  := $(addprefix $(install)/, $(all-files))
  36
  37# Work out what needs to be removed
  38oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
  39unwanted      := $(filter-out $(all-files),$(oldheaders))
  40
  41# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  42unwanted-file := $(addprefix $(install)/, $(unwanted))
  43
  44printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  45
  46quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  47                            file$(if $(word 2, $(all-files)),s))
  48      cmd_install = \
  49        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
  50        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
  51        touch $@
  52
  53quiet_cmd_remove = REMOVE  $(unwanted)
  54      cmd_remove = rm -f $(unwanted-file)
  55
  56quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  57# Headers list can be pretty long, xargs helps to avoid
  58# the "Argument list too long" error.
  59      cmd_check = for f in $(all-files); do                          \
  60                  echo "$(install)/$${f}"; done                      \
  61                  | xargs                                            \
  62                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  63                  touch $@
  64
  65PHONY += __headersinst __headerscheck
  66
  67ifndef HDRCHECK
  68# Rules for installing headers
  69__headersinst: $(subdirs) $(install-file)
  70        @:
  71
  72targets += $(install-file)
  73$(install-file): scripts/headers_install.pl $(input-files) FORCE
  74        $(if $(unwanted),$(call cmd,remove),)
  75        $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
  76        $(call if_changed,install)
  77
  78else
  79__headerscheck: $(subdirs) $(check-file)
  80        @:
  81
  82targets += $(check-file)
  83$(check-file): scripts/headers_check.pl $(output-files) FORCE
  84        $(call if_changed,check)
  85
  86endif
  87
  88# Recursion
  89hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  90.PHONY: $(subdirs)
  91$(subdirs):
  92        $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
  93
  94targets := $(wildcard $(sort $(targets)))
  95cmd_files := $(wildcard \
  96             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  97
  98ifneq ($(cmd_files),)
  99        include $(cmd_files)
 100endif
 101
 102.PHONY: $(PHONY)
 103PHONY += FORCE
 104FORCE: ;
 105