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