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 PHONY := __headers
  12 __headers:
  13
  14 include scripts/Kbuild.include
  15
  16 srcdir        := $(srctree)/$(obj)
  17 subdirs       := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.))
  18 # caller may set destination dir (when installing to asm/)
  19 _dst          := $(if $(dst),$(dst),$(obj))
  20
  21 # Recursion
  22 __headers: $(subdirs)
  23
  24 .PHONY: $(subdirs)
  25 $(subdirs):
  26         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
  27
  28 # Skip header install/check for include/uapi and arch/$(hdr-arch)/include/uapi.
  29 # We have only sub-directories there.
  30 skip-inst := $(if $(filter %/uapi,$(obj)),1)
  31
  32 ifeq ($(skip-inst),)
  33
  34 # generated header directory
  35 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  36
  37 # Kbuild file is optional
  38 kbuild-file := $(srctree)/$(obj)/Kbuild
  39 -include $(kbuild-file)
  40
  41 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
  42 ifneq ($(wildcard $(old-kbuild-file)),)
  43 include $(old-kbuild-file)
  44 endif
  45
  46 installdir    := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
  47
  48 gendir        := $(objtree)/$(gen)
  49 header-files  := $(notdir $(wildcard $(srcdir)/*.h))
  50 header-files  += $(notdir $(wildcard $(srcdir)/*.agh))
  51 header-files  := $(filter-out $(no-export-headers), $(header-files))
  52 genhdr-files  := $(notdir $(wildcard $(gendir)/*.h))
  53 genhdr-files  := $(filter-out $(header-files), $(genhdr-files))
  54
  55 # files used to track state of install/check
  56 install-file  := $(installdir)/.install
  57 check-file    := $(installdir)/.check
  58
  59 # generic-y list all files an architecture uses from asm-generic
  60 # Use this to build a list of headers which require a wrapper
  61 generic-files := $(notdir $(wildcard $(srctree)/include/uapi/asm-generic/*.h))
  62 wrapper-files := $(filter $(generic-files), $(generic-y))
  63 wrapper-files := $(filter-out $(header-files), $(wrapper-files))
  64
  65 # all headers files for this dir
  66 all-files     := $(header-files) $(genhdr-files) $(wrapper-files)
  67 output-files  := $(addprefix $(installdir)/, $(all-files))
  68
  69 ifneq ($(mandatory-y),)
  70 missing       := $(filter-out $(all-files),$(mandatory-y))
  71 ifneq ($(missing),)
  72 $(error Some mandatory headers ($(missing)) are missing in $(obj))
  73 endif
  74 endif
  75
  76 # Work out what needs to be removed
  77 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  78 unwanted      := $(filter-out $(all-files),$(oldheaders))
  79
  80 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  81 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  82
  83 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  84
  85 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  86                             file$(if $(word 2, $(all-files)),s))
  87       cmd_install = \
  88         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
  89         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
  90         for F in $(wrapper-files); do                                   \
  91                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
  92         done;                                                           \
  93         touch $@
  94
  95 quiet_cmd_remove = REMOVE  $(unwanted)
  96       cmd_remove = rm -f $(unwanted-file)
  97
  98 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
  99 # Headers list can be pretty long, xargs helps to avoid
 100 # the "Argument list too long" error.
 101       cmd_check = for f in $(all-files); do                          \
 102                   echo "$(installdir)/$${f}"; done                      \
 103                   | xargs                                            \
 104                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
 105                   touch $@
 106
 107 ifndef HDRCHECK
 108 # Rules for installing headers
 109 __headers: $(install-file)
 110         @:
 111
 112 targets += $(install-file)
 113 $(install-file): scripts/headers_install.sh \
 114                  $(addprefix $(srcdir)/,$(header-files)) \
 115                  $(addprefix $(gendir)/,$(genhdr-files)) FORCE
 116         $(if $(unwanted),$(call cmd,remove),)
 117         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 118         $(call if_changed,install)
 119
 120 else
 121 __headers: $(check-file)
 122         @:
 123
 124 targets += $(check-file)
 125 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 126         $(call if_changed,check)
 127
 128 endif
 129
 130 targets := $(wildcard $(sort $(targets)))
 131 cmd_files := $(wildcard \
 132              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 133
 134 ifneq ($(cmd_files),)
 135         include $(cmd_files)
 136 endif
 137
 138 endif # skip-inst
 139
 140 .PHONY: $(PHONY)
 141 PHONY += FORCE
 142 FORCE: ;