1 # SPDX-License-Identifier: GPL-2.0
2 # ============================================
3 # Installing headers
4 #
5 # All headers under include/uapi, include/gene
6 # arch/<arch>/include/uapi and arch/<arch>/inc
7 # exported.
8 # They are preprocessed to remove __KERNEL__ s
9 #
10 # ============================================
11
12 PHONY := __headers
13 __headers:
14
15 include $(srctree)/scripts/Kbuild.include
16
17 src := $(srctree)/$(obj)
18 gen := $(objtree)/$(subst include/,include/gen
19 dst := usr/include
20
21 -include $(src)/Kbuild
22
23 # $(filter %/, ...) is a workaround for GNU Ma
24 # $(wildcard $(src)/*/) contains not only dire
25 src-subdirs := $(patsubst $(src)/%/,%,$(filter
26 gen-subdirs := $(patsubst $(gen)/%/,%,$(filter
27 all-subdirs := $(sort $(src-subdirs) $(gen-sub
28
29 src-headers := $(if $(src-subdirs), $(shell cd
30 src-headers := $(filter-out $(no-export-header
31 gen-headers := $(if $(gen-subdirs), $(shell cd
32 gen-headers := $(filter-out $(no-export-header
33
34 # If the same header is exported from source a
35 # the former takes precedence, but this should
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
47 # Work out what needs to be removed
48 old-subdirs := $(wildcard $(all-subdirs))
49 old-headers := $(if $(old-subdirs),$(shell fin
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
62 $(src-headers): $(dst)/%.h: $(src)/%.h $(srctr
63 $(call if_changed,install)
64
65 $(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctr
66 $(call if_changed,install)
67
68 quiet_cmd_remove = REMOVE $(unwanted)
69 cmd_remove = rm -f $(unwanted)
70
71 __headers: $(all-headers)
72 ifneq ($(unwanted),)
73 $(call cmd,remove)
74 endif
75 @:
76
77 existing-headers := $(filter $(old-headers), $
78
79 -include $(foreach f,$(existing-headers),$(dir
80
81 PHONY += FORCE
82 FORCE:
83
84 .PHONY: $(PHONY)
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