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
17_dst := $(if $(destination-y),$(destination-y),$(_dst))
18
19include scripts/Kbuild.include
20
21install       := $(INSTALL_HDR_PATH)/$(_dst)
22
23header-y      := $(sort $(header-y) $(unifdef-y))
24subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
25header-y      := $(filter-out %/, $(header-y))
26
27# files used to track state of install/check
28install-file  := $(install)/.install
29check-file    := $(install)/.check
30
31# all headers files for this dir
32all-files     := $(header-y) $(objhdr-y)
33input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
34                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y))
35output-files  := $(addprefix $(install)/, $(all-files))
36
37# Work out what needs to be removed
38oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
39unwanted      := $(filter-out $(all-files),$(oldheaders))
40
41# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
42unwanted-file := $(addprefix $(install)/, $(unwanted))
43
44printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
45
46quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
47                            file$(if $(word 2, $(all-files)),s))
48      cmd_install = \
49        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
50        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
51        touch $@
52
53quiet_cmd_remove = REMOVE  $(unwanted)
54      cmd_remove = rm -f $(unwanted-file)
55
56quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
57      cmd_check = $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH) \
58                  $(addprefix $(install)/, $(all-files));           \
59	          touch $@
60
61PHONY += __headersinst __headerscheck
62
63ifndef HDRCHECK
64# Rules for installing headers
65__headersinst: $(subdirs) $(install-file)
66	@:
67
68targets += $(install-file)
69$(install-file): scripts/headers_install.pl $(input-files) FORCE
70	$(if $(unwanted),$(call cmd,remove),)
71	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
72	$(call if_changed,install)
73
74else
75__headerscheck: $(subdirs) $(check-file)
76	@:
77
78targets += $(check-file)
79$(check-file): scripts/headers_check.pl $(output-files) FORCE
80	$(call if_changed,check)
81
82endif
83
84# Recursion
85hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
86.PHONY: $(subdirs)
87$(subdirs):
88	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
89
90targets := $(wildcard $(sort $(targets)))
91cmd_files := $(wildcard \
92             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
93
94ifneq ($(cmd_files),)
95	include $(cmd_files)
96endif
97
98.PHONY: $(PHONY)
99PHONY += FORCE
100FORCE: ;
101