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

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