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1 | # SPDX-License-Identifier: GPL-2.0 | |
2 | # ========================================================================== | |
3 | # Installing headers | |
4 | # | |
5 | # All headers under include/uapi, include/generated/uapi, | |
6 | # arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are | |
7 | # exported. | |
8 | # They are preprocessed to remove __KERNEL__ section of the file. | |
9 | # | |
10 | # ========================================================================== | |
11 | ||
12 | PHONY := __headers | |
13 | __headers: | |
14 | ||
15 | include scripts/Kbuild.include | |
16 | ||
17 | srcdir := $(srctree)/$(obj) | |
18 | ||
19 | # When make is run under a fakechroot environment, the function | |
20 | # $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular | |
21 | # files. So, we are using a combination of sort/dir/wildcard which works | |
22 | # with fakechroot. | |
23 | subdirs := $(patsubst $(srcdir)/%/,%,\ | |
24 | $(filter-out $(srcdir)/,\ | |
25 | $(sort $(dir $(wildcard $(srcdir)/*/))))) | |
26 | ||
27 | # Recursion | |
28 | __headers: $(subdirs) | |
29 | ||
30 | PHONY += $(subdirs) | |
31 | $(subdirs): | |
32 | $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@ | |
33 | ||
34 | # Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi. | |
35 | # We have only sub-directories there. | |
36 | skip-inst := $(if $(filter %/uapi,$(obj)),1) | |
37 | ||
38 | ifeq ($(skip-inst),) | |
39 | ||
40 | # Kbuild file is optional | |
41 | kbuild-file := $(srctree)/$(obj)/Kbuild | |
42 | -include $(kbuild-file) | |
43 | ||
44 | installdir := $(INSTALL_HDR_PATH)/$(dst) | |
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 | |
66 | ||
67 | # Work out what needs to be removed | |
68 | oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) | |
69 | unwanted := $(filter-out $(all-files),$(oldheaders)) | |
70 | ||
71 | # Prefix unwanted with full paths to $(INSTALL_HDR_PATH) | |
72 | unwanted-file := $(addprefix $(installdir)/, $(unwanted)) | |
73 | ||
74 | printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) | |
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 $@ | |
82 | ||
83 | quiet_cmd_remove = REMOVE $(unwanted) | |
84 | cmd_remove = rm -f $(unwanted-file) | |
85 | ||
86 | quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files) | |
87 | # Headers list can be pretty long, xargs helps to avoid | |
88 | # the "Argument list too long" error. | |
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) | |
110 | @: | |
111 | ||
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 | |
124 | ||
125 | endif # skip-inst | |
126 | ||
127 | PHONY += FORCE | |
128 | FORCE: ; | |
129 | ||
130 | .PHONY: $(PHONY) |