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