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