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

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