1 # SPDX-License-Identifier: GPL-2.0 <<
2 # ============================================ 1 # ==========================================================================
3 # Installing headers 2 # Installing headers
4 # 3 #
5 # All headers under include/uapi, include/gene !! 4 # header-y - list files to be installed. They are preprocessed
6 # arch/<arch>/include/uapi and arch/<arch>/inc !! 5 # to remove __KERNEL__ section of the file
7 # exported. !! 6 # unifdef-y - Same as header-y. Obsolete
8 # They are preprocessed to remove __KERNEL__ s !! 7 # objhdr-y - Same as header-y but for generated files
9 # 8 #
10 # ============================================ 9 # ==========================================================================
11 10
12 PHONY := __headers !! 11 # called may set destination dir (when installing to asm/)
13 __headers: !! 12 _dst := $(if $(dst),$(dst),$(obj))
14 13
15 include $(srctree)/scripts/Kbuild.include !! 14 kbuild-file := $(srctree)/$(obj)/Kbuild
>> 15 include $(kbuild-file)
16 16
17 src := $(srctree)/$(obj) !! 17 _dst := $(if $(destination-y),$(destination-y),$(_dst))
18 gen := $(objtree)/$(subst include/,include/gen !! 18
19 dst := usr/include !! 19 include scripts/Kbuild.include
20 !! 20
21 -include $(src)/Kbuild !! 21 install := $(INSTALL_HDR_PATH)/$(_dst)
22 !! 22
23 # $(filter %/, ...) is a workaround for GNU Ma !! 23 header-y := $(sort $(header-y) $(unifdef-y))
24 # $(wildcard $(src)/*/) contains not only dire !! 24 subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
25 src-subdirs := $(patsubst $(src)/%/,%,$(filter !! 25 header-y := $(filter-out %/, $(header-y))
26 gen-subdirs := $(patsubst $(gen)/%/,%,$(filter !! 26
27 all-subdirs := $(sort $(src-subdirs) $(gen-sub !! 27 # files used to track state of install/check
28 !! 28 install-file := $(install)/.install
29 src-headers := $(if $(src-subdirs), $(shell cd !! 29 check-file := $(install)/.check
30 src-headers := $(filter-out $(no-export-header !! 30
31 gen-headers := $(if $(gen-subdirs), $(shell cd !! 31 # all headers files for this dir
32 gen-headers := $(filter-out $(no-export-header !! 32 all-files := $(header-y) $(objhdr-y)
33 !! 33 input-files := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
34 # If the same header is exported from source a !! 34 $(addprefix $(objtree)/$(obj)/,$(objhdr-y))
35 # the former takes precedence, but this should !! 35 output-files := $(addprefix $(install)/, $(all-files))
36 duplicated := $(filter $(gen-headers), $(src-h <<
37 $(if $(duplicated), $(warning duplicated heade <<
38 <<
39 gen-headers := $(filter-out $(duplicated), $(g <<
40 <<
41 # Add dst path prefix <<
42 all-subdirs := $(addprefix $(dst)/, $(all-subd <<
43 src-headers := $(addprefix $(dst)/, $(src-head <<
44 gen-headers := $(addprefix $(dst)/, $(gen-head <<
45 all-headers := $(src-headers) $(gen-headers) <<
46 36
47 # Work out what needs to be removed 37 # Work out what needs to be removed
48 old-subdirs := $(wildcard $(all-subdirs)) !! 38 oldheaders := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
49 old-headers := $(if $(old-subdirs),$(shell fin !! 39 unwanted := $(filter-out $(all-files),$(oldheaders))
50 unwanted := $(filter-out $(all-headers), $( <<
51 <<
52 # Create directories <<
53 existing-dirs := $(sort $(dir $(old-headers))) <<
54 wanted-dirs := $(sort $(dir $(all-headers))) <<
55 new-dirs := $(filter-out $(existing-dirs) <<
56 $(if $(new-dirs), $(shell mkdir -p $(new-dirs) <<
57 <<
58 # Rules <<
59 quiet_cmd_install = HDRINST $@ <<
60 cmd_install = $(CONFIG_SHELL) $(srctree) <<
61 40
62 $(src-headers): $(dst)/%.h: $(src)/%.h $(srctr !! 41 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
63 $(call if_changed,install) !! 42 unwanted-file := $(addprefix $(install)/, $(unwanted))
64 43
65 $(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctr !! 44 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
66 $(call if_changed,install) !! 45
>> 46 quiet_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 $@
67 52
68 quiet_cmd_remove = REMOVE $(unwanted) 53 quiet_cmd_remove = REMOVE $(unwanted)
69 cmd_remove = rm -f $(unwanted) !! 54 cmd_remove = rm -f $(unwanted-file)
70 55
71 __headers: $(all-headers) !! 56 quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
72 ifneq ($(unwanted),) !! 57 # Headers list can be pretty long, xargs helps to avoid
73 $(call cmd,remove) !! 58 # the "Argument list too long" error.
74 endif !! 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
>> 65 PHONY += __headersinst __headerscheck
>> 66
>> 67 ifndef HDRCHECK
>> 68 # Rules for installing headers
>> 69 __headersinst: $(subdirs) $(install-file)
75 @: 70 @:
76 71
77 existing-headers := $(filter $(old-headers), $ !! 72 targets += $(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)
78 77
79 -include $(foreach f,$(existing-headers),$(dir !! 78 else
>> 79 __headerscheck: $(subdirs) $(check-file)
>> 80 @:
80 81
81 PHONY += FORCE !! 82 targets += $(check-file)
82 FORCE: !! 83 $(check-file): scripts/headers_check.pl $(output-files) FORCE
>> 84 $(call if_changed,check)
>> 85
>> 86 endif
>> 87
>> 88 # Recursion
>> 89 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
>> 90 .PHONY: $(subdirs)
>> 91 $(subdirs):
>> 92 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
>> 93
>> 94 targets := $(wildcard $(sort $(targets)))
>> 95 cmd_files := $(wildcard \
>> 96 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
>> 97
>> 98 ifneq ($(cmd_files),)
>> 99 include $(cmd_files)
>> 100 endif
83 101
84 .PHONY: $(PHONY) 102 .PHONY: $(PHONY)
>> 103 PHONY += FORCE
>> 104 FORCE: ;
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