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 # called may set destination dir (when installing to asm/)
  11 _dst := $(or $(destination-y),$(dst),$(obj))
  12
  13 # generated header directory
  14 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  15
  16 kbuild-file := $(srctree)/$(obj)/Kbuild
  17 include $(kbuild-file)
  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-files   := $(foreach hdr, $(header-y), \
  51                    $(or \
  52                         $(wildcard $(srcdir)/$(hdr)), \
  53                         $(wildcard $(oldsrcdir)/$(hdr)), \
  54                         $(error Missing UAPI file $(srcdir)/$(hdr)) \
  55                    )) \
  56                  $(foreach hdr, $(genhdr-y), \
  57                    $(or \
  58                         $(wildcard $(gendir)/$(hdr)), \
  59                         $(error Missing generated UAPI file $(gendir)/$(hdr)) \
  60                    ))
  61
  62 # Work out what needs to be removed
  63 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  64 unwanted      := $(filter-out $(all-files),$(oldheaders))
  65
  66 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  67 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  68
  69 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  70
  71 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  72                             file$(if $(word 2, $(all-files)),s))
  73       cmd_install = \
  74         $(PERL) $< $(installdir) $(SRCARCH) $(input-files); \
  75         for F in $(wrapper-files); do                                   \
  76                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
  77         done;                                                           \
  78         touch $@
  79
  80 quiet_cmd_remove = REMOVE  $(unwanted)
  81       cmd_remove = rm -f $(unwanted-file)
  82
  83 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  84 # Headers list can be pretty long, xargs helps to avoid
  85 # the "Argument list too long" error.
  86       cmd_check = for f in $(all-files); do                          \
  87                   echo "$(installdir)/$${f}"; done                      \
  88                   | xargs                                            \
  89                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  90                   touch $@
  91
  92 PHONY += __headersinst __headerscheck
  93
  94 ifndef HDRCHECK
  95 # Rules for installing headers
  96 __headersinst: $(subdirs) $(install-file)
  97         @:
  98
  99 targets += $(install-file)
 100 $(install-file): scripts/headers_install.pl $(input-files) FORCE
 101         $(if $(unwanted),$(call cmd,remove),)
 102         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 103         $(call if_changed,install)
 104
 105 else
 106 __headerscheck: $(subdirs) $(check-file)
 107         @:
 108
 109 targets += $(check-file)
 110 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 111         $(call if_changed,check)
 112
 113 endif
 114
 115 # Recursion
 116 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 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: ;