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 # genhdr-y  - Same as header-y but in a generated/ directory
   7 #
   8 # ==========================================================================
   9
  10 # generated header directory
  11 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  12
  13 kbuild-file := $(srctree)/$(obj)/Kbuild
  14 include $(kbuild-file)
  15
  16 # called may set destination dir (when installing to asm/)
  17 _dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj)))
  18
  19 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
  20 ifneq ($(wildcard $(old-kbuild-file)),)
  21 include $(old-kbuild-file)
  22 endif
  23
  24 include scripts/Kbuild.include
  25
  26 installdir    := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
  27
  28 header-y      := $(sort $(header-y))
  29 subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
  30 header-y      := $(filter-out %/, $(header-y))
  31
  32 # files used to track state of install/check
  33 install-file  := $(installdir)/.install
  34 check-file    := $(installdir)/.check
  35
  36 # generic-y list all files an architecture uses from asm-generic
  37 # Use this to build a list of headers which require a wrapper
  38 wrapper-files := $(filter $(header-y), $(generic-y))
  39
  40 srcdir        := $(srctree)/$(obj)
  41 gendir        := $(objtree)/$(gen)
  42
  43 oldsrcdir     := $(srctree)/$(subst /uapi,,$(obj))
  44
  45 # all headers files for this dir
  46 header-y      := $(filter-out $(generic-y), $(header-y))
  47 all-files     := $(header-y) $(genhdr-y) $(wrapper-files)
  48 output-files  := $(addprefix $(installdir)/, $(all-files))
  49
  50 input-files1  := $(foreach hdr, $(header-y), \
  51                    $(if $(wildcard $(srcdir)/$(hdr)), \
  52                         $(wildcard $(srcdir)/$(hdr))) \
  53                    )
  54 input-files1-name := $(notdir $(input-files1))
  55 input-files2  := $(foreach hdr, $(header-y), \
  56                    $(if  $(wildcard $(srcdir)/$(hdr)),, \
  57                         $(if $(wildcard $(oldsrcdir)/$(hdr)), \
  58                                 $(wildcard $(oldsrcdir)/$(hdr)), \
  59                                 $(error Missing UAPI file $(srcdir)/$(hdr))) \
  60                    ))
  61 input-files2-name := $(notdir $(input-files2))
  62 input-files3  := $(foreach hdr, $(genhdr-y), \
  63                    $(if $(wildcard $(gendir)/$(hdr)), \
  64                         $(wildcard $(gendir)/$(hdr)), \
  65                         $(error Missing generated UAPI file $(gendir)/$(hdr)) \
  66                    ))
  67 input-files3-name := $(notdir $(input-files3))
  68
  69 # Work out what needs to be removed
  70 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  71 unwanted      := $(filter-out $(all-files),$(oldheaders))
  72
  73 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  74 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  75
  76 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  77
  78 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  79                             file$(if $(word 2, $(all-files)),s))
  80       cmd_install = \
  81         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \
  82         $(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \
  83         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \
  84         for F in $(wrapper-files); do                                   \
  85                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
  86         done;                                                           \
  87         touch $@
  88
  89 quiet_cmd_remove = REMOVE  $(unwanted)
  90       cmd_remove = rm -f $(unwanted-file)
  91
  92 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  93 # Headers list can be pretty long, xargs helps to avoid
  94 # the "Argument list too long" error.
  95       cmd_check = for f in $(all-files); do                          \
  96                   echo "$(installdir)/$${f}"; done                      \
  97                   | xargs                                            \
  98                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  99                   touch $@
 100
 101 PHONY += __headersinst __headerscheck
 102
 103 ifndef HDRCHECK
 104 # Rules for installing headers
 105 __headersinst: $(subdirs) $(install-file)
 106         @:
 107
 108 targets += $(install-file)
 109 $(install-file): scripts/headers_install.sh $(input-files1) $(input-files2) $(input-files3) FORCE
 110         $(if $(unwanted),$(call cmd,remove),)
 111         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 112         $(call if_changed,install)
 113
 114 else
 115 __headerscheck: $(subdirs) $(check-file)
 116         @:
 117
 118 targets += $(check-file)
 119 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 120         $(call if_changed,check)
 121
 122 endif
 123
 124 # Recursion
 125 .PHONY: $(subdirs)
 126 $(subdirs):
 127         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
 128
 129 targets := $(wildcard $(sort $(targets)))
 130 cmd_files := $(wildcard \
 131              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 132
 133 ifneq ($(cmd_files),)
 134         include $(cmd_files)
 135 endif
 136
 137 .PHONY: $(PHONY)
 138 PHONY += FORCE
 139 FORCE: ;