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# unifdef-y - Same as header-y. Obsolete
7# objhdr-y  - Same as header-y but for generated files
8#
9# ==========================================================================
10
11# called may set destination dir (when installing to asm/)
12_dst := $(if $(dst),$(dst),$(obj))
13
14kbuild-file := $(srctree)/$(obj)/Kbuild
15include $(kbuild-file)
16
17include scripts/Kbuild.include
18
19install       := $(INSTALL_HDR_PATH)/$(_dst)
20
21header-y      := $(sort $(header-y) $(unifdef-y))
22subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
23header-y      := $(filter-out %/, $(header-y))
24
25# files used to track state of install/check
26install-file  := $(install)/.install
27check-file    := $(install)/.check
28
29# all headers files for this dir
30all-files     := $(header-y) $(objhdr-y)
31input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
32                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y))
33output-files  := $(addprefix $(install)/, $(all-files))
34
35# Work out what needs to be removed
36oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
37unwanted      := $(filter-out $(all-files),$(oldheaders))
38
39# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
40unwanted-file := $(addprefix $(install)/, $(unwanted))
41
42printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
43
44quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
45                            file$(if $(word 2, $(all-files)),s))
46      cmd_install = \
47        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
48        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
49        touch $@
50
51quiet_cmd_remove = REMOVE  $(unwanted)
52      cmd_remove = rm -f $(unwanted-file)
53
54quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
55      cmd_check = $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH) \
56                  $(addprefix $(install)/, $(all-files));           \
57	          touch $@
58
59PHONY += __headersinst __headerscheck
60
61ifndef HDRCHECK
62# Rules for installing headers
63__headersinst: $(subdirs) $(install-file)
64	@:
65
66targets += $(install-file)
67$(install-file): scripts/headers_install.pl $(input-files) FORCE
68	$(if $(unwanted),$(call cmd,remove),)
69	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
70	$(call if_changed,install)
71
72else
73__headerscheck: $(subdirs) $(check-file)
74	@:
75
76targets += $(check-file)
77$(check-file): scripts/headers_check.pl $(output-files) FORCE
78	$(call if_changed,check)
79
80endif
81
82# Recursion
83hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
84.PHONY: $(subdirs)
85$(subdirs):
86	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
87
88targets := $(wildcard $(sort $(targets)))
89cmd_files := $(wildcard \
90             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
91
92ifneq ($(cmd_files),)
93	include $(cmd_files)
94endif
95
96.PHONY: $(PHONY)
97PHONY += FORCE
98FORCE: ;
99