Root/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# 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# Headers list can be pretty long, xargs helps to avoid
58# the "Argument list too long" error.
59      cmd_check = for f in $(all-files); do \
60                  echo "$(install)/$${f}"; done \
61                  | xargs \
62                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
63              touch $@
64
65PHONY += __headersinst __headerscheck
66
67ifndef HDRCHECK
68# Rules for installing headers
69__headersinst: $(subdirs) $(install-file)
70    @:
71
72targets += $(install-file)
73$(install-file): scripts/headers_install.pl $(input-files) FORCE
74    $(if $(unwanted),$(call cmd,remove),)
75    $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
76    $(call if_changed,install)
77
78else
79__headerscheck: $(subdirs) $(check-file)
80    @:
81
82targets += $(check-file)
83$(check-file): scripts/headers_check.pl $(output-files) FORCE
84    $(call if_changed,check)
85
86endif
87
88# Recursion
89hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
90.PHONY: $(subdirs)
91$(subdirs):
92    $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
93
94targets := $(wildcard $(sort $(targets)))
95cmd_files := $(wildcard \
96             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
97
98ifneq ($(cmd_files),)
99    include $(cmd_files)
100endif
101
102.PHONY: $(PHONY)
103PHONY += FORCE
104FORCE: ;
105

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