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