Makefile.headersinst

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    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: ;

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FreeBSD/Linux Kernel Cross Reference sys/scripts/Makefile.headersinst

FreeBSD/Linux Kernel Cross Reference
sys/scripts/Makefile.headersinst