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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 install := $(INSTALL_HDR_PATH)/$(_dst)
  32
  33 header-y        := $(sort $(header-y) $(unifdef-y))
  34 subdir-y        := $(patsubst %/,%,$(filter %/, $(header-y)))
  35 header-y        := $(filter-out %/, $(header-y))
  36
  37 # stamp files for header checks
  38 check-y         := $(patsubst %,.check.%,$(header-y) $(objhdr-y))
  39
  40 # Work out what needs to be removed
  41 oldheaders      := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
  42 unwanted        := $(filter-out $(header-y) $(objhdr-y),$(oldheaders))
  43
  44 oldcheckstamps  := $(patsubst $(install)/%,%,$(wildcard $(install)/.check.*.h))
  45 unwanted        += $(filter-out $(check-y),$(oldcheckstamps))
  46
  47 # Prefix them all with full paths to $(INSTALL_HDR_PATH)
  48 header-y        := $(patsubst %,$(install)/%,$(header-y))
  49 objhdr-y        := $(patsubst %,$(install)/%,$(objhdr-y))
  50 check-y         := $(patsubst %,$(install)/%,$(check-y))
  51
  52 quiet_cmd_o_hdr_install = INSTALL $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  53       cmd_o_hdr_install = cp $(patsubst $(install)/%,$(objtree)/$(obj)/%,$@) \
  54                              $(install)
  55
  56 quiet_cmd_unifdef = UNIFDEF $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  57       cmd_unifdef = $(UNIFDEF) $(patsubst $(install)/%,$(srctree)/$(obj)/%,$@)\
  58                                | $(HDRSED) > $@ || :
  59
  60 quiet_cmd_check = CHECK   $(patsubst $(install)/.check.%,$(_dst)/%,$@)
  61       cmd_check = $(CONFIG_SHELL) $(srctree)/scripts/hdrcheck.sh \
  62                   $(INSTALL_HDR_PATH)/include $(subst /.check.,/,$@) $@
  63
  64 quiet_cmd_remove = REMOVE  $(_dst)/$@
  65       cmd_remove = rm -f $(install)/$@
  66
  67 quiet_cmd_mkdir  = MKDIR   $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  68       cmd_mkdir  = mkdir -p $@
  69
  70 .PHONY: __headersinst __headerscheck
  71
  72 ifdef HDRCHECK
  73 __headerscheck: $(subdir-y) $(check-y)
  74         @true
  75
  76 $(check-y) : $(install)/.check.%.h : $(install)/%.h
  77         $(call cmd,check)
  78
  79 # Other dependencies for $(check-y)
  80 include /dev/null $(wildcard $(check-y))
  81
  82 # but leave $(check-y) as .PHONY for now until those
  83 # deps are actually correct.
  84 .PHONY: $(check-y)
  85
  86 else
  87 # Rules for installing headers
  88 __headersinst: $(subdir-y) $(header-y) $(objhdr-y)
  89         @true
  90
  91 $(objhdr-y) $(subdir-y) $(header-y): | $(install) $(unwanted)
  92
  93 $(install):
  94         $(call cmd,mkdir)
  95
  96 # Rules for removing unwanted header files
  97 .PHONY: $(unwanted)
  98 $(unwanted):
  99         $(call cmd,remove)
 100
 101 # Install generated files
 102 $(objhdr-y): $(install)/%.h: $(objtree)/$(obj)/%.h $(kbuild-file)
 103         $(call cmd,o_hdr_install)
 104
 105 # Unifdef header files and install them
 106 $(header-y): $(install)/%.h: $(srctree)/$(obj)/%.h $(kbuild-file)
 107         $(call cmd,unifdef)
 108
 109 endif
 110
 111 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 112
 113 # Recursion
 114 .PHONY: $(subdir-y)
 115 $(subdir-y):
 116         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@