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 $(dst),$(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 # all headers files for this dir
  44 header-y      := $(filter-out $(generic-y), $(header-y))
  45 all-files     := $(header-y) $(genhdr-y) $(wrapper-files)
  46 output-files  := $(addprefix $(installdir)/, $(all-files))
  47
  48 # Check that all expected files exist
  49 $(foreach hdr, $(header-y), \
  50   $(if $(wildcard $(srcdir)/$(hdr)),, \
  51        $(error Missing UAPI file $(srcdir)/$(hdr)) \
  52    ))
  53 $(foreach hdr, $(genhdr-y), \
  54   $(if  $(wildcard $(gendir)/$(hdr)),, \
  55        $(error Missing generated UAPI file $(gendir)/$(hdr)) \
  56   ))
  57
  58 # Work out what needs to be removed
  59 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  60 unwanted      := $(filter-out $(all-files),$(oldheaders))
  61
  62 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  63 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  64
  65 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  66
  67 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  68                             file$(if $(word 2, $(all-files)),s))
  69       cmd_install = \
  70         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-y); \
  71         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-y); \
  72         for F in $(wrapper-files); do                                   \
  73                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
  74         done;                                                           \
  75         touch $@
  76
  77 quiet_cmd_remove = REMOVE  $(unwanted)
  78       cmd_remove = rm -f $(unwanted-file)
  79
  80 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  81 # Headers list can be pretty long, xargs helps to avoid
  82 # the "Argument list too long" error.
  83       cmd_check = for f in $(all-files); do                          \
  84                   echo "$(installdir)/$${f}"; done                      \
  85                   | xargs                                            \
  86                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
  87                   touch $@
  88
  89 PHONY += __headersinst __headerscheck
  90
  91 ifndef HDRCHECK
  92 # Rules for installing headers
  93 __headersinst: $(subdirs) $(install-file)
  94         @:
  95
  96 targets += $(install-file)
  97 $(install-file): scripts/headers_install.sh \
  98                  $(addprefix $(srcdir)/,$(header-y)) \
  99                  $(addprefix $(gendir)/,$(genhdr-y)) FORCE
 100         $(if $(unwanted),$(call cmd,remove),)
 101         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 102         $(call if_changed,install)
 103
 104 else
 105 __headerscheck: $(subdirs) $(check-file)
 106         @:
 107
 108 targets += $(check-file)
 109 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 110         $(call if_changed,check)
 111
 112 endif
 113
 114 # Recursion
 115 .PHONY: $(subdirs)
 116 $(subdirs):
 117         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
 118
 119 targets := $(wildcard $(sort $(targets)))
 120 cmd_files := $(wildcard \
 121              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 122
 123 ifneq ($(cmd_files),)
 124         include $(cmd_files)
 125 endif
 126
 127 .PHONY: $(PHONY)
 128 PHONY += FORCE
 129 FORCE: ;