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 # genhdr-y  - Same as objhdr-y but in a generated/ directory
   8 #
   9 # ==========================================================================
  10
  11 # called may set destination dir (when installing to asm/)
  12 _dst := $(if $(dst),$(dst),$(obj))
  13
  14 # generated header directory
  15 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  16
  17 kbuild-file := $(srctree)/$(obj)/Kbuild
  18 include $(kbuild-file)
  19
  20 _dst := $(if $(destination-y),$(destination-y),$(_dst))
  21
  22 include scripts/Kbuild.include
  23
  24 install       := $(INSTALL_HDR_PATH)/$(_dst)
  25
  26 header-y      := $(sort $(header-y))
  27 subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
  28 header-y      := $(filter-out %/, $(header-y))
  29
  30 # files used to track state of install/check
  31 install-file  := $(install)/.install
  32 check-file    := $(install)/.check
  33
  34 # generic-y list all files an architecture uses from asm-generic
  35 # Use this to build a list of headers which require a wrapper
  36 wrapper-files := $(filter $(header-y), $(generic-y))
  37
  38 # all headers files for this dir
  39 header-y      := $(filter-out $(generic-y), $(header-y))
  40 all-files     := $(header-y) $(objhdr-y) $(genhdr-y) $(wrapper-files)
  41 input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
  42                  $(addprefix $(objtree)/$(obj)/,$(objhdr-y)) \
  43                  $(addprefix $(objtree)/$(gen)/,$(genhdr-y))
  44 output-files  := $(addprefix $(install)/, $(all-files))
  45
  46 # Work out what needs to be removed
  47 oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
  48 unwanted      := $(filter-out $(all-files),$(oldheaders))
  49
  50 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  51 unwanted-file := $(addprefix $(install)/, $(unwanted))
  52
  53 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  54
  55 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  56                             file$(if $(word 2, $(all-files)),s))
  57       cmd_install = \
  58         $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
  59         $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
  60         $(PERL) $< $(objtree)/$(gen) $(install) $(SRCARCH) $(genhdr-y); \
  61         for F in $(wrapper-files); do                                   \
  62                 echo "\#include <asm-generic/$$F>" > $(install)/$$F;    \
  63         done;                                                           \
  64         touch $@
  65
  66 quiet_cmd_remove = REMOVE  $(unwanted)
  67       cmd_remove = rm -f $(unwanted-file)
  68
  69 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  70 # Headers list can be pretty long, xargs helps to avoid
  71 # the "Argument list too long" error.
  72       cmd_check = for f in $(all-files); do                          \
  73                   echo "$(install)/$${f}"; done                      \
  74                   | xargs                                            \
  75                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  76                   touch $@
  77
  78 PHONY += __headersinst __headerscheck
  79
  80 ifndef HDRCHECK
  81 # Rules for installing headers
  82 __headersinst: $(subdirs) $(install-file)
  83         @:
  84
  85 targets += $(install-file)
  86 $(install-file): scripts/headers_install.pl $(input-files) FORCE
  87         $(if $(unwanted),$(call cmd,remove),)
  88         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
  89         $(call if_changed,install)
  90
  91 else
  92 __headerscheck: $(subdirs) $(check-file)
  93         @:
  94
  95 targets += $(check-file)
  96 $(check-file): scripts/headers_check.pl $(output-files) FORCE
  97         $(call if_changed,check)
  98
  99 endif
 100
 101 # Recursion
 102 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 103 .PHONY: $(subdirs)
 104 $(subdirs):
 105         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
 106
 107 targets := $(wildcard $(sort $(targets)))
 108 cmd_files := $(wildcard \
 109              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 110
 111 ifneq ($(cmd_files),)
 112         include $(cmd_files)
 113 endif
 114
 115 .PHONY: $(PHONY)
 116 PHONY += FORCE
 117 FORCE: ;