scripts/Makefile.headersinst

   1 # ==========================================================================
   2 # Installing headers
   3 #
   4 # All headers under include/uapi, include/generated/uapi,
   5 # arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
   6 # exported.
   7 # They are preprocessed to remove __KERNEL__ section of the file.
   8 #
   9 # ==========================================================================
  10
  11 # generated header directory
  12 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  13
  14 # Kbuild file is optional
  15 kbuild-file := $(srctree)/$(obj)/Kbuild
  16 -include $(kbuild-file)
  17
  18 # called may set destination dir (when installing to asm/)
  19 _dst := $(if $(dst),$(dst),$(obj))
  20
  21 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
  22 ifneq ($(wildcard $(old-kbuild-file)),)
  23 include $(old-kbuild-file)
  24 endif
  25
  26 include scripts/Kbuild.include
  27
  28 installdir    := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
  29
  30 srcdir        := $(srctree)/$(obj)
  31 gendir        := $(objtree)/$(gen)
  32 subdirs       := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.))
  33 header-files  := $(notdir $(wildcard $(srcdir)/*.h))
  34 header-files  += $(notdir $(wildcard $(srcdir)/*.agh))
  35 header-files  := $(filter-out $(no-export-headers), $(header-files))
  36 genhdr-files  := $(notdir $(wildcard $(gendir)/*.h))
  37 genhdr-files  := $(filter-out $(header-files), $(genhdr-files))
  38
  39 # files used to track state of install/check
  40 install-file  := $(installdir)/.install
  41 check-file    := $(installdir)/.check
  42
  43 # generic-y list all files an architecture uses from asm-generic
  44 # Use this to build a list of headers which require a wrapper
  45 generic-files := $(notdir $(wildcard $(srctree)/include/uapi/asm-generic/*.h))
  46 wrapper-files := $(filter $(generic-files), $(generic-y))
  47 wrapper-files := $(filter-out $(header-files), $(wrapper-files))
  48
  49 # all headers files for this dir
  50 all-files     := $(header-files) $(genhdr-files) $(wrapper-files)
  51 output-files  := $(addprefix $(installdir)/, $(all-files))
  52
  53 ifneq ($(mandatory-y),)
  54 missing       := $(filter-out $(all-files),$(mandatory-y))
  55 ifneq ($(missing),)
  56 $(error Some mandatory headers ($(missing)) are missing in $(obj))
  57 endif
  58 endif
  59
  60 # Work out what needs to be removed
  61 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  62 unwanted      := $(filter-out $(all-files),$(oldheaders))
  63
  64 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  65 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  66
  67 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  68
  69 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  70                             file$(if $(word 2, $(all-files)),s))
  71       cmd_install = \
  72         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
  73         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
  74         for F in $(wrapper-files); do                                   \
  75                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
  76         done;                                                           \
  77         touch $@
  78
  79 quiet_cmd_remove = REMOVE  $(unwanted)
  80       cmd_remove = rm -f $(unwanted-file)
  81
  82 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  83 # Headers list can be pretty long, xargs helps to avoid
  84 # the "Argument list too long" error.
  85       cmd_check = for f in $(all-files); do                          \
  86                   echo "$(installdir)/$${f}"; done                      \
  87                   | xargs                                            \
  88                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  89                   touch $@
  90
  91 PHONY += __headersinst __headerscheck
  92
  93 ifndef HDRCHECK
  94 # Rules for installing headers
  95 __headersinst: $(subdirs) $(install-file)
  96         @:
  97
  98 targets += $(install-file)
  99 $(install-file): scripts/headers_install.sh \
 100                  $(addprefix $(srcdir)/,$(header-files)) \
 101                  $(addprefix $(gendir)/,$(genhdr-files)) FORCE
 102         $(if $(unwanted),$(call cmd,remove),)
 103         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 104         $(call if_changed,install)
 105
 106 else
 107 __headerscheck: $(subdirs) $(check-file)
 108         @:
 109
 110 targets += $(check-file)
 111 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 112         $(call if_changed,check)
 113
 114 endif
 115
 116 # Recursion
 117 .PHONY: $(subdirs)
 118 $(subdirs):
 119         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
 120
 121 targets := $(wildcard $(sort $(targets)))
 122 cmd_files := $(wildcard \
 123              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 124
 125 ifneq ($(cmd_files),)
 126         include $(cmd_files)
 127 endif
 128
 129 .PHONY: $(PHONY)
 130 PHONY += FORCE
 131 FORCE: ;