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Linux/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 $(destination-y),$(destination-y),$(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 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-files1  := $(foreach hdr, $(header-y), \
 51                    $(if $(wildcard $(srcdir)/$(hdr)), \
 52                         $(wildcard $(srcdir)/$(hdr))) \
 53                    )
 54 input-files1-name := $(notdir $(input-files1))
 55 input-files2  := $(foreach hdr, $(header-y), \
 56                    $(if  $(wildcard $(srcdir)/$(hdr)),, \
 57                         $(if $(wildcard $(oldsrcdir)/$(hdr)), \
 58                                 $(wildcard $(oldsrcdir)/$(hdr)), \
 59                                 $(error Missing UAPI file $(srcdir)/$(hdr))) \
 60                    ))
 61 input-files2-name := $(notdir $(input-files2))
 62 input-files3  := $(foreach hdr, $(genhdr-y), \
 63                    $(if $(wildcard $(gendir)/$(hdr)), \
 64                         $(wildcard $(gendir)/$(hdr)), \
 65                         $(error Missing generated UAPI file $(gendir)/$(hdr)) \
 66                    ))
 67 input-files3-name := $(notdir $(input-files3))
 68 
 69 # Work out what needs to be removed
 70 oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
 71 unwanted      := $(filter-out $(all-files),$(oldheaders))
 72 
 73 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
 74 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
 75 
 76 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
 77 
 78 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
 79                             file$(if $(word 2, $(all-files)),s))
 80       cmd_install = \
 81         $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \
 82         $(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \
 83         $(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \
 84         for F in $(wrapper-files); do                                   \
 85                 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
 86         done;                                                           \
 87         touch $@
 88 
 89 quiet_cmd_remove = REMOVE  $(unwanted)
 90       cmd_remove = rm -f $(unwanted-file)
 91 
 92 quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
 93 # Headers list can be pretty long, xargs helps to avoid
 94 # the "Argument list too long" error.
 95       cmd_check = for f in $(all-files); do                          \
 96                   echo "$(installdir)/$${f}"; done                      \
 97                   | xargs                                            \
 98                   $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
 99                   touch $@
100 
101 PHONY += __headersinst __headerscheck
102 
103 ifndef HDRCHECK
104 # Rules for installing headers
105 __headersinst: $(subdirs) $(install-file)
106         @:
107 
108 targets += $(install-file)
109 $(install-file): scripts/headers_install.sh $(input-files1) $(input-files2) $(input-files3) FORCE
110         $(if $(unwanted),$(call cmd,remove),)
111         $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
112         $(call if_changed,install)
113 
114 else
115 __headerscheck: $(subdirs) $(check-file)
116         @:
117 
118 targets += $(check-file)
119 $(check-file): scripts/headers_check.pl $(output-files) FORCE
120         $(call if_changed,check)
121 
122 endif
123 
124 # Recursion
125 .PHONY: $(subdirs)
126 $(subdirs):
127         $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
128 
129 targets := $(wildcard $(sort $(targets)))
130 cmd_files := $(wildcard \
131              $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
132 
133 ifneq ($(cmd_files),)
134         include $(cmd_files)
135 endif
136 
137 .PHONY: $(PHONY)
138 PHONY += FORCE
139 FORCE: ;

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