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   1 # ==========================================================================
   2 # Installing headers
   3 #
   4 # header-y files will be installed verbatim
   5 # unifdef-y are the files where unifdef will be run before installing files
   6 # objhdr-y are generated files that will be installed verbatim
   7 #
   8 # ==========================================================================
   9
  10 UNIFDEF := scripts/unifdef -U__KERNEL__
  11
  12 # Eliminate the contents of (and inclusions of) compiler.h
  13 HDRSED  := sed  -e "s/ inline / __inline__ /g" \
  14                 -e "s/[[:space:]]__user[[:space:]]\{1,\}/ /g" \
  15                 -e "s/(__user[[:space:]]\{1,\}/ (/g" \
  16                 -e "s/[[:space:]]__force[[:space:]]\{1,\}/ /g" \
  17                 -e "s/(__force[[:space:]]\{1,\}/ (/g" \
  18                 -e "s/[[:space:]]__iomem[[:space:]]\{1,\}/ /g" \
  19                 -e "s/(__iomem[[:space:]]\{1,\}/ (/g" \
  20                 -e "s/[[:space:]]__attribute_const__[[:space:]]\{1,\}/\ /g" \
  21                 -e "s/[[:space:]]__attribute_const__$$//" \
  22                 -e "/^\#include <linux\/compiler.h>/d"
  23
  24 _dst := $(if $(dst),$(dst),$(obj))
  25
  26 kbuild-file := $(srctree)/$(obj)/Kbuild
  27 include $(kbuild-file)
  28
  29 include scripts/Kbuild.include
  30
  31 # If this is include/asm-$(ARCH) then override $(_dst) so that
  32 # we install to include/asm directly.
  33 # Unless $(BIASMDIR) is set, in which case we're probably doing
  34 # a 'headers_install_all' build and we should keep the -$(ARCH)
  35 # in the directory name.
  36 ifeq ($(obj),include/asm-$(ARCH)$(BIASMDIR))
  37      _dst := include/asm
  38 endif
  39
  40 header-y        := $(sort $(header-y) $(unifdef-y))
  41 subdir-y        := $(patsubst %/,%,$(filter %/, $(header-y)))
  42 header-y        := $(filter-out %/, $(header-y))
  43
  44 # stamp files for header checks
  45 check-y         := $(patsubst %,.check.%,$(header-y) $(objhdr-y))
  46
  47 # Work out what needs to be removed
  48 oldheaders      := $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$(wildcard $(INSTALL_HDR_PATH)/$(_dst)/*.h))
  49 unwanted        := $(filter-out $(header-y) $(objhdr-y),$(oldheaders))
  50
  51 oldcheckstamps  := $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$(wildcard $(INSTALL_HDR_PATH)/$(_dst)/.check.*.h))
  52 unwanted        += $(filter-out $(check-y),$(oldcheckstamps))
  53
  54 # Prefix them all with full paths to $(INSTALL_HDR_PATH)
  55 header-y        := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(header-y))
  56 objhdr-y        := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(objhdr-y))
  57 check-y         := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(check-y))
  58
  59 quiet_cmd_o_hdr_install   = INSTALL $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  60       cmd_o_hdr_install   = cp $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,$(objtree)/$(obj)/%,$@) \
  61                             $(INSTALL_HDR_PATH)/$(_dst)
  62
  63 quiet_cmd_unifdef         = UNIFDEF $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  64       cmd_unifdef         = $(UNIFDEF) $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,$(srctree)/$(obj)/%,$@) \
  65                                    | $(HDRSED) > $@ || :
  66
  67 quiet_cmd_check           = CHECK   $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/.check.%,$(_dst)/%,$@)
  68       cmd_check           = $(CONFIG_SHELL) $(srctree)/scripts/hdrcheck.sh \
  69                               $(INSTALL_HDR_PATH)/include $(subst /.check.,/,$@) $@
  70
  71 quiet_cmd_remove          = REMOVE  $(_dst)/$@
  72       cmd_remove          = rm -f $(INSTALL_HDR_PATH)/$(_dst)/$@
  73
  74 quiet_cmd_mkdir           = MKDIR   $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  75       cmd_mkdir           = mkdir -p $@
  76
  77 .PHONY: __headersinst __headerscheck
  78
  79 ifdef HDRCHECK
  80 __headerscheck: $(subdir-y) $(check-y)
  81         @true
  82
  83 $(check-y) : $(INSTALL_HDR_PATH)/$(_dst)/.check.%.h : $(INSTALL_HDR_PATH)/$(_dst)/%.h
  84         $(call cmd,check)
  85
  86 # Other dependencies for $(check-y)
  87 include /dev/null $(wildcard $(check-y))
  88
  89 # ... but leave $(check-y) as .PHONY for now until those deps are actually correct.
  90 .PHONY: $(check-y)
  91
  92 else
  93 # Rules for installing headers
  94 __headersinst: $(subdir-y) $(header-y) $(objhdr-y)
  95         @true
  96
  97 $(objhdr-y) $(subdir-y) $(header-y): | $(INSTALL_HDR_PATH)/$(_dst) $(unwanted)
  98
  99 $(INSTALL_HDR_PATH)/$(_dst):
 100         $(call cmd,mkdir)
 101
 102 .PHONY: $(unwanted)
 103 $(unwanted):
 104         $(call cmd,remove)
 105
 106 $(objhdr-y): $(INSTALL_HDR_PATH)/$(_dst)/%.h: $(objtree)/$(obj)/%.h $(kbuild-file)
 107         $(call cmd,o_hdr_install)
 108
 109 $(header-y): $(INSTALL_HDR_PATH)/$(_dst)/%.h: $(srctree)/$(obj)/%.h $(kbuild-file)
 110         $(call cmd,unifdef)
 111
 112 endif
 113
 114 hdrinst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 115
 116 # Recursion
 117 .PHONY: $(subdir-y)
 118 $(subdir-y):
 119         $(Q)$(MAKE) $(hdrinst)=$(obj)/$@ dst=$(_dst)/$@ rel=../$(rel)