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
  18 # When make is run under a fakechroot environment, the function
  19 # $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular
  20 # files. So, we are using a combination of sort/dir/wildcard which works
  21 # with fakechroot.
  22 subdirs       := $(patsubst $(srcdir)/%/,%,\
  23                  $(filter-out $(srcdir)/,\
  24                  $(sort $(dir $(wildcard $(srcdir)/*/)))))
  25
  26 # caller may set destination dir (when installing to asm/)
  27 _dst          := $(if $(dst),$(dst),$(obj))
  28
  29 # Recursion
  30 __headers: $(subdirs)
  31
  32 .PHONY: $(subdirs)
  33 $(subdirs):
  34         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
  35
  36 # Skip header install/check for include/uapi and arch/$(hdr-arch)/include/uapi.
  37 # We have only sub-directories there.
  38 skip-inst := $(if $(filter %/uapi,$(obj)),1)
  39
  40 ifeq ($(skip-inst),)
  41
  42 # generated header directory
  43 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
  44
  45 # Kbuild file is optional
  46 kbuild-file := $(srctree)/$(obj)/Kbuild
  47 -include $(kbuild-file)
  48
  49 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
  50 ifneq ($(wildcard $(old-kbuild-file)),)
  51 include $(old-kbuild-file)
  52 endif
  53
  54 installdir    := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
  55
  56 gendir        := $(objtree)/$(gen)
  57 header-files  := $(notdir $(wildcard $(srcdir)/*.h))
  58 header-files  += $(notdir $(wildcard $(srcdir)/*.agh))
  59 header-files  := $(filter-out $(no-export-headers), $(header-files))
  60 genhdr-files  := $(notdir $(wildcard $(gendir)/*.h))
  61 genhdr-files  := $(filter-out $(header-files), $(genhdr-files))
  62
  63 # files used to track state of install/check
  64 install-file  := $(installdir)/.install
  65 check-file    := $(installdir)/.check
  66
  67 # generic-y list all files an architecture uses from asm-generic
  68 # Use this to build a list of headers which require a wrapper
  69 generic-files := $(notdir $(wildcard $(srctree)/include/uapi/asm-generic/*.h))
  70 wrapper-files := $(filter $(generic-files), $(generic-y))
  71 wrapper-files := $(filter-out $(header-files), $(wrapper-files))
  72
  73 # all headers files for this dir
  74 all-files     := $(header-files) $(genhdr-files) $(wrapper-files)
  75 output-files  := $(addprefix $(installdir)/, $(all-files))
  76
  77 ifneq ($(mandatory-y),)
  78 missing       := $(filter-out $(all-files),$(mandatory-y))
  79 ifneq ($(missing),)
  80 $(error Some mandatory headers ($(missing)) are missing in $(obj))
  81 endif
  82 endif
  83
  84 # Work out what needs to be removed
  85 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
  86 unwanted      := $(filter-out $(all-files),$(oldheaders))
  87
  88 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
  89 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
  90
  91 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
  92
  93 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
  94                             file$(if $(word 2, $(all-files)),s))
  95       cmd_install = \
  96         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
  97         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
  98         for F in $(wrapper-files); do                                   \
  99                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
 100         done;                                                           \
 101         touch $@
 102
 103 quiet_cmd_remove = REMOVE  $(unwanted)
 104       cmd_remove = rm -f $(unwanted-file)
 105
 106 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
 107 # Headers list can be pretty long, xargs helps to avoid
 108 # the "Argument list too long" error.
 109       cmd_check = for f in $(all-files); do                          \
 110                   echo "$(installdir)/$${f}"; done                      \
 111                   | xargs                                            \
 112                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
 113                   touch $@
 114
 115 ifndef HDRCHECK
 116 # Rules for installing headers
 117 __headers: $(install-file)
 118         @:
 119
 120 targets += $(install-file)
 121 $(install-file): scripts/headers_install.sh \
 122                  $(addprefix $(srcdir)/,$(header-files)) \
 123                  $(addprefix $(gendir)/,$(genhdr-files)) FORCE
 124         $(if $(unwanted),$(call cmd,remove),)
 125         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 126         $(call if_changed,install)
 127
 128 else
 129 __headers: $(check-file)
 130         @:
 131
 132 targets += $(check-file)
 133 $(check-file): scripts/headers_check.pl $(output-files) FORCE
 134         $(call if_changed,check)
 135
 136 endif
 137
 138 targets := $(wildcard $(sort $(targets)))
 139 cmd_files := $(wildcard \
 140              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 141
 142 ifneq ($(cmd_files),)
 143         include $(cmd_files)
 144 endif
 145
 146 endif # skip-inst
 147
 148 .PHONY: $(PHONY)
 149 PHONY += FORCE
 150 FORCE: ;