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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 install := $(INSTALL_HDR_PATH)/$(_dst)
  41
  42 header-y        := $(sort $(header-y) $(unifdef-y))
  43 subdir-y        := $(patsubst %/,%,$(filter %/, $(header-y)))
  44 header-y        := $(filter-out %/, $(header-y))
  45
  46 # stamp files for header checks
  47 check-y         := $(patsubst %,.check.%,$(header-y) $(objhdr-y))
  48
  49 # Work out what needs to be removed
  50 oldheaders      := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
  51 unwanted        := $(filter-out $(header-y) $(objhdr-y),$(oldheaders))
  52
  53 oldcheckstamps  := $(patsubst $(install)/%,%,$(wildcard $(install)/.check.*.h))
  54 unwanted        += $(filter-out $(check-y),$(oldcheckstamps))
  55
  56 # Prefix them all with full paths to $(INSTALL_HDR_PATH)
  57 header-y        := $(patsubst %,$(install)/%,$(header-y))
  58 objhdr-y        := $(patsubst %,$(install)/%,$(objhdr-y))
  59 check-y         := $(patsubst %,$(install)/%,$(check-y))
  60
  61 quiet_cmd_o_hdr_install = INSTALL $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  62       cmd_o_hdr_install = cp $(patsubst $(install)/%,$(objtree)/$(obj)/%,$@) \
  63                              $(install)
  64
  65 quiet_cmd_unifdef = UNIFDEF $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  66       cmd_unifdef = $(UNIFDEF) $(patsubst $(install)/%,$(srctree)/$(obj)/%,$@)\
  67                                | $(HDRSED) > $@ || :
  68
  69 quiet_cmd_check = CHECK   $(patsubst $(install)/.check.%,$(_dst)/%,$@)
  70       cmd_check = $(CONFIG_SHELL) $(srctree)/scripts/hdrcheck.sh \
  71                   $(INSTALL_HDR_PATH)/include $(subst /.check.,/,$@) $@
  72
  73 quiet_cmd_remove = REMOVE  $(_dst)/$@
  74       cmd_remove = rm -f $(install)/$@
  75
  76 quiet_cmd_mkdir  = MKDIR   $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
  77       cmd_mkdir  = mkdir -p $@
  78
  79 .PHONY: __headersinst __headerscheck
  80
  81 ifdef HDRCHECK
  82 __headerscheck: $(subdir-y) $(check-y)
  83         @true
  84
  85 $(check-y) : $(install)/.check.%.h : $(install)/%.h
  86         $(call cmd,check)
  87
  88 # Other dependencies for $(check-y)
  89 include /dev/null $(wildcard $(check-y))
  90
  91 # but leave $(check-y) as .PHONY for now until those
  92 # deps are actually correct.
  93 .PHONY: $(check-y)
  94
  95 else
  96 # Rules for installing headers
  97 __headersinst: $(subdir-y) $(header-y) $(objhdr-y)
  98         @true
  99
 100 $(objhdr-y) $(subdir-y) $(header-y): | $(install) $(unwanted)
 101
 102 $(install):
 103         $(call cmd,mkdir)
 104
 105 # Rules for removing unwanted header files
 106 .PHONY: $(unwanted)
 107 $(unwanted):
 108         $(call cmd,remove)
 109
 110 # Install generated files
 111 $(objhdr-y): $(install)/%.h: $(objtree)/$(obj)/%.h $(kbuild-file)
 112         $(call cmd,o_hdr_install)
 113
 114 # Unifdef header files and install them
 115 $(header-y): $(install)/%.h: $(srctree)/$(obj)/%.h $(kbuild-file)
 116         $(call cmd,unifdef)
 117
 118 endif
 119
 120 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 121
 122 # Recursion
 123 .PHONY: $(subdir-y)
 124 $(subdir-y):
 125         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@