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 # genhdr-y - Same as header-y but in a generated/ directory
8 # They are preprocessed to remove __KERNEL__ s <<
9 # 7 #
10 # ============================================ 8 # ==========================================================================
11 9
12 PHONY := __headers !! 10 # generated header directory
13 __headers: !! 11 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
14 12
15 include $(srctree)/scripts/Kbuild.include !! 13 kbuild-file := $(srctree)/$(obj)/Kbuild
>> 14 include $(kbuild-file)
16 15
17 src := $(srctree)/$(obj) !! 16 # called may set destination dir (when installing to asm/)
18 gen := $(objtree)/$(subst include/,include/gen !! 17 _dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj)))
19 dst := usr/include !! 18
20 !! 19 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
21 -include $(src)/Kbuild !! 20 ifneq ($(wildcard $(old-kbuild-file)),)
22 !! 21 include $(old-kbuild-file)
23 # $(filter %/, ...) is a workaround for GNU Ma !! 22 endif
24 # $(wildcard $(src)/*/) contains not only dire !! 23
25 src-subdirs := $(patsubst $(src)/%/,%,$(filter !! 24 include scripts/Kbuild.include
26 gen-subdirs := $(patsubst $(gen)/%/,%,$(filter !! 25
27 all-subdirs := $(sort $(src-subdirs) $(gen-sub !! 26 installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
28 !! 27
29 src-headers := $(if $(src-subdirs), $(shell cd !! 28 header-y := $(sort $(header-y))
30 src-headers := $(filter-out $(no-export-header !! 29 subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
31 gen-headers := $(if $(gen-subdirs), $(shell cd !! 30 header-y := $(filter-out %/, $(header-y))
32 gen-headers := $(filter-out $(no-export-header !! 31
33 !! 32 # files used to track state of install/check
34 # If the same header is exported from source a !! 33 install-file := $(installdir)/.install
35 # the former takes precedence, but this should !! 34 check-file := $(installdir)/.check
36 duplicated := $(filter $(gen-headers), $(src-h !! 35
37 $(if $(duplicated), $(warning duplicated heade !! 36 # generic-y list all files an architecture uses from asm-generic
38 !! 37 # Use this to build a list of headers which require a wrapper
39 gen-headers := $(filter-out $(duplicated), $(g !! 38 wrapper-files := $(filter $(header-y), $(generic-y))
40 !! 39
41 # Add dst path prefix !! 40 srcdir := $(srctree)/$(obj)
42 all-subdirs := $(addprefix $(dst)/, $(all-subd !! 41 gendir := $(objtree)/$(gen)
43 src-headers := $(addprefix $(dst)/, $(src-head !! 42
44 gen-headers := $(addprefix $(dst)/, $(gen-head !! 43 oldsrcdir := $(srctree)/$(subst /uapi,,$(obj))
45 all-headers := $(src-headers) $(gen-headers) !! 44
>> 45 # all headers files for this dir
>> 46 header-y := $(filter-out $(generic-y), $(header-y))
>> 47 all-files := $(header-y) $(genhdr-y) $(wrapper-files)
>> 48 output-files := $(addprefix $(installdir)/, $(all-files))
>> 49
>> 50 input-files1 := $(foreach hdr, $(header-y), \
>> 51 $(if $(wildcard $(srcdir)/$(hdr)), \
>> 52 $(wildcard $(srcdir)/$(hdr))) \
>> 53 )
>> 54 input-files1-name := $(notdir $(input-files1))
>> 55 input-files2 := $(foreach hdr, $(header-y), \
>> 56 $(if $(wildcard $(srcdir)/$(hdr)),, \
>> 57 $(if $(wildcard $(oldsrcdir)/$(hdr)), \
>> 58 $(wildcard $(oldsrcdir)/$(hdr)), \
>> 59 $(error Missing UAPI file $(srcdir)/$(hdr))) \
>> 60 ))
>> 61 input-files2-name := $(notdir $(input-files2))
>> 62 input-files3 := $(foreach hdr, $(genhdr-y), \
>> 63 $(if $(wildcard $(gendir)/$(hdr)), \
>> 64 $(wildcard $(gendir)/$(hdr)), \
>> 65 $(error Missing generated UAPI file $(gendir)/$(hdr)) \
>> 66 ))
>> 67 input-files3-name := $(notdir $(input-files3))
46 68
47 # Work out what needs to be removed 69 # Work out what needs to be removed
48 old-subdirs := $(wildcard $(all-subdirs)) !! 70 oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
49 old-headers := $(if $(old-subdirs),$(shell fin !! 71 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 72
62 $(src-headers): $(dst)/%.h: $(src)/%.h $(srctr !! 73 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
63 $(call if_changed,install) !! 74 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
64 75
65 $(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctr !! 76 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
66 $(call if_changed,install) !! 77
>> 78 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
>> 79 file$(if $(word 2, $(all-files)),s))
>> 80 cmd_install = \
>> 81 $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \
>> 82 $(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \
>> 83 $(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \
>> 84 for F in $(wrapper-files); do \
>> 85 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \
>> 86 done; \
>> 87 touch $@
67 88
68 quiet_cmd_remove = REMOVE $(unwanted) 89 quiet_cmd_remove = REMOVE $(unwanted)
69 cmd_remove = rm -f $(unwanted) !! 90 cmd_remove = rm -f $(unwanted-file)
70 91
71 __headers: $(all-headers) !! 92 quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
72 ifneq ($(unwanted),) !! 93 # Headers list can be pretty long, xargs helps to avoid
73 $(call cmd,remove) !! 94 # the "Argument list too long" error.
74 endif !! 95 cmd_check = for f in $(all-files); do \
>> 96 echo "$(installdir)/$${f}"; done \
>> 97 | xargs \
>> 98 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
>> 99 touch $@
>> 100
>> 101 PHONY += __headersinst __headerscheck
>> 102
>> 103 ifndef HDRCHECK
>> 104 # Rules for installing headers
>> 105 __headersinst: $(subdirs) $(install-file)
75 @: 106 @:
76 107
77 existing-headers := $(filter $(old-headers), $ !! 108 targets += $(install-file)
>> 109 $(install-file): scripts/headers_install.sh $(input-files1) $(input-files2) $(input-files3) FORCE
>> 110 $(if $(unwanted),$(call cmd,remove),)
>> 111 $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
>> 112 $(call if_changed,install)
78 113
79 -include $(foreach f,$(existing-headers),$(dir !! 114 else
>> 115 __headerscheck: $(subdirs) $(check-file)
>> 116 @:
80 117
81 PHONY += FORCE !! 118 targets += $(check-file)
82 FORCE: !! 119 $(check-file): scripts/headers_check.pl $(output-files) FORCE
>> 120 $(call if_changed,check)
>> 121
>> 122 endif
>> 123
>> 124 # Recursion
>> 125 .PHONY: $(subdirs)
>> 126 $(subdirs):
>> 127 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
>> 128
>> 129 targets := $(wildcard $(sort $(targets)))
>> 130 cmd_files := $(wildcard \
>> 131 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
>> 132
>> 133 ifneq ($(cmd_files),)
>> 134 include $(cmd_files)
>> 135 endif
83 136
84 .PHONY: $(PHONY) 137 .PHONY: $(PHONY)
>> 138 PHONY += FORCE
>> 139 FORCE: ;
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