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# objhdr-y  - Same as header-y but for generated files
  7# genhdr-y  - Same as objhdr-y but in a generated directory
  8#
  9# ==========================================================================
 10
 11# called may set destination dir (when installing to asm/)
 12_dst := $(if $(dst),$(dst),$(obj))
 13
 14# generated header directory
 15gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
 16
 17kbuild-file := $(srctree)/$(obj)/Kbuild
 18include $(kbuild-file)
 19
 20_dst := $(if $(destination-y),$(destination-y),$(_dst))
 21
 22include scripts/Kbuild.include
 23
 24install       := $(INSTALL_HDR_PATH)/$(_dst)
 25
 26header-y      := $(sort $(header-y))
 27subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
 28header-y      := $(filter-out %/, $(header-y))
 29
 30# files used to track state of install/check
 31install-file  := $(install)/.install
 32check-file    := $(install)/.check
 33
 34# generic-y list all files an architecture uses from asm-generic
 35# Use this to build a list of headers which require a wrapper
 36wrapper-files := $(filter $(header-y), $(generic-y))
 37
 38# all headers files for this dir
 39header-y      := $(filter-out $(generic-y), $(header-y))
 40all-files     := $(header-y) $(objhdr-y) $(genhdr-y) $(wrapper-files)
 41input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
 42                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y)) \
 43                 $(addprefix $(objtree)/$(gen)/,$(genhdr-y))
 44output-files  := $(addprefix $(install)/, $(all-files))
 45
 46# Work out what needs to be removed
 47oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
 48unwanted      := $(filter-out $(all-files),$(oldheaders))
 49
 50# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
 51unwanted-file := $(addprefix $(install)/, $(unwanted))
 52
 53printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
 54
 55quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
 56                            file$(if $(word 2, $(all-files)),s))
 57      cmd_install = \
 58        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
 59        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
 60        $(PERL) $< $(objtree)/$(gen) $(install) $(SRCARCH) $(genhdr-y); \
 61        for F in $(wrapper-files); do                                   \
 62                echo "\#include <asm-generic/$$F>" > $(install)/$$F;    \
 63        done;                                                           \
 64        touch $@
 65
 66quiet_cmd_remove = REMOVE  $(unwanted)
 67      cmd_remove = rm -f $(unwanted-file)
 68
 69quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
 70# Headers list can be pretty long, xargs helps to avoid
 71# the "Argument list too long" error.
 72      cmd_check = for f in $(all-files); do                          \
 73                  echo "$(install)/$${f}"; done                      \
 74                  | xargs                                            \
 75                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
 76	          touch $@
 77
 78PHONY += __headersinst __headerscheck
 79
 80ifndef HDRCHECK
 81# Rules for installing headers
 82__headersinst: $(subdirs) $(install-file)
 83	@:
 84
 85targets += $(install-file)
 86$(install-file): scripts/headers_install.pl $(input-files) FORCE
 87	$(if $(unwanted),$(call cmd,remove),)
 88	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
 89	$(call if_changed,install)
 90
 91else
 92__headerscheck: $(subdirs) $(check-file)
 93	@:
 94
 95targets += $(check-file)
 96$(check-file): scripts/headers_check.pl $(output-files) FORCE
 97	$(call if_changed,check)
 98
 99endif
100
101# Recursion
102hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
103.PHONY: $(subdirs)
104$(subdirs):
105	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
106
107targets := $(wildcard $(sort $(targets)))
108cmd_files := $(wildcard \
109             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
110
111ifneq ($(cmd_files),)
112	include $(cmd_files)
113endif
114
115.PHONY: $(PHONY)
116PHONY += FORCE
117FORCE: ;