1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # ============================================ 2 # ==========================================================================
3 # Installing headers 3 # Installing headers
4 # 4 #
5 # All headers under include/uapi, include/gene 5 # All headers under include/uapi, include/generated/uapi,
6 # arch/<arch>/include/uapi and arch/<arch>/inc 6 # arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
7 # exported. 7 # exported.
8 # They are preprocessed to remove __KERNEL__ s 8 # They are preprocessed to remove __KERNEL__ section of the file.
9 # 9 #
10 # ============================================ 10 # ==========================================================================
11 11
12 PHONY := __headers 12 PHONY := __headers
13 __headers: 13 __headers:
14 14
15 include $(srctree)/scripts/Kbuild.include !! 15 include scripts/Kbuild.include
16 16
17 src := $(srctree)/$(obj) !! 17 srcdir := $(srctree)/$(obj)
18 gen := $(objtree)/$(subst include/,include/gen !! 18
19 dst := usr/include !! 19 # When make is run under a fakechroot environment, the function
20 !! 20 # $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular
21 -include $(src)/Kbuild !! 21 # files. So, we are using a combination of sort/dir/wildcard which works
22 !! 22 # with fakechroot.
23 # $(filter %/, ...) is a workaround for GNU Ma !! 23 subdirs := $(patsubst $(srcdir)/%/,%,\
24 # $(wildcard $(src)/*/) contains not only dire !! 24 $(filter-out $(srcdir)/,\
25 src-subdirs := $(patsubst $(src)/%/,%,$(filter !! 25 $(sort $(dir $(wildcard $(srcdir)/*/)))))
26 gen-subdirs := $(patsubst $(gen)/%/,%,$(filter !! 26
27 all-subdirs := $(sort $(src-subdirs) $(gen-sub !! 27 # Recursion
28 !! 28 __headers: $(subdirs)
29 src-headers := $(if $(src-subdirs), $(shell cd !! 29
30 src-headers := $(filter-out $(no-export-header !! 30 PHONY += $(subdirs)
31 gen-headers := $(if $(gen-subdirs), $(shell cd !! 31 $(subdirs):
32 gen-headers := $(filter-out $(no-export-header !! 32 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@
33 !! 33
34 # If the same header is exported from source a !! 34 # Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi.
35 # the former takes precedence, but this should !! 35 # We have only sub-directories there.
36 duplicated := $(filter $(gen-headers), $(src-h !! 36 skip-inst := $(if $(filter %/uapi,$(obj)),1)
37 $(if $(duplicated), $(warning duplicated heade !! 37
38 !! 38 ifeq ($(skip-inst),)
39 gen-headers := $(filter-out $(duplicated), $(g !! 39
40 !! 40 # Kbuild file is optional
41 # Add dst path prefix !! 41 kbuild-file := $(srctree)/$(obj)/Kbuild
42 all-subdirs := $(addprefix $(dst)/, $(all-subd !! 42 -include $(kbuild-file)
43 src-headers := $(addprefix $(dst)/, $(src-head !! 43
44 gen-headers := $(addprefix $(dst)/, $(gen-head !! 44 installdir := $(INSTALL_HDR_PATH)/$(dst)
45 all-headers := $(src-headers) $(gen-headers) !! 45 gendir := $(objtree)/$(subst include/,include/generated/,$(obj))
>> 46 header-files := $(notdir $(wildcard $(srcdir)/*.h))
>> 47 header-files += $(notdir $(wildcard $(srcdir)/*.agh))
>> 48 header-files := $(filter-out $(no-export-headers), $(header-files))
>> 49 genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
>> 50 genhdr-files := $(filter-out $(header-files), $(genhdr-files))
>> 51
>> 52 # files used to track state of install/check
>> 53 install-file := $(installdir)/.install
>> 54 check-file := $(installdir)/.check
>> 55
>> 56 # all headers files for this dir
>> 57 all-files := $(header-files) $(genhdr-files)
>> 58 output-files := $(addprefix $(installdir)/, $(all-files))
>> 59
>> 60 ifneq ($(mandatory-y),)
>> 61 missing := $(filter-out $(all-files),$(mandatory-y))
>> 62 ifneq ($(missing),)
>> 63 $(error Some mandatory headers ($(missing)) are missing in $(obj))
>> 64 endif
>> 65 endif
46 66
47 # Work out what needs to be removed 67 # Work out what needs to be removed
48 old-subdirs := $(wildcard $(all-subdirs)) !! 68 oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
49 old-headers := $(if $(old-subdirs),$(shell fin !! 69 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 70
62 $(src-headers): $(dst)/%.h: $(src)/%.h $(srctr !! 71 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
63 $(call if_changed,install) !! 72 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
64 73
65 $(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctr !! 74 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
66 $(call if_changed,install) !! 75
>> 76 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
>> 77 file$(if $(word 2, $(all-files)),s))
>> 78 cmd_install = \
>> 79 $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
>> 80 $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
>> 81 touch $@
67 82
68 quiet_cmd_remove = REMOVE $(unwanted) 83 quiet_cmd_remove = REMOVE $(unwanted)
69 cmd_remove = rm -f $(unwanted) !! 84 cmd_remove = rm -f $(unwanted-file)
70 85
71 __headers: $(all-headers) !! 86 quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
72 ifneq ($(unwanted),) !! 87 # Headers list can be pretty long, xargs helps to avoid
73 $(call cmd,remove) !! 88 # the "Argument list too long" error.
74 endif !! 89 cmd_check = for f in $(all-files); do \
>> 90 echo "$(installdir)/$${f}"; done \
>> 91 | xargs \
>> 92 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
>> 93 touch $@
>> 94
>> 95 ifndef HDRCHECK
>> 96 # Rules for installing headers
>> 97 __headers: $(install-file)
>> 98 @:
>> 99
>> 100 targets += $(install-file)
>> 101 $(install-file): scripts/headers_install.sh \
>> 102 $(addprefix $(srcdir)/,$(header-files)) \
>> 103 $(addprefix $(gendir)/,$(genhdr-files)) FORCE
>> 104 $(if $(unwanted),$(call cmd,remove),)
>> 105 $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
>> 106 $(call if_changed,install)
>> 107
>> 108 else
>> 109 __headers: $(check-file)
75 @: 110 @:
76 111
77 existing-headers := $(filter $(old-headers), $ !! 112 targets += $(check-file)
>> 113 $(check-file): scripts/headers_check.pl $(output-files) FORCE
>> 114 $(call if_changed,check)
>> 115
>> 116 endif
>> 117
>> 118 cmd_files := $(wildcard \
>> 119 $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
>> 120
>> 121 ifneq ($(cmd_files),)
>> 122 include $(cmd_files)
>> 123 endif
78 124
79 -include $(foreach f,$(existing-headers),$(dir !! 125 endif # skip-inst
80 126
81 PHONY += FORCE 127 PHONY += FORCE
82 FORCE: !! 128 FORCE: ;
83 129
84 .PHONY: $(PHONY) 130 .PHONY: $(PHONY)
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