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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
12PHONY := __headers
13__headers:
14
15include scripts/Kbuild.include
16
17srcdir := $(srctree)/$(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.
23subdirs := $(patsubst $(srcdir)/%/,%,\
24 $(filter-out $(srcdir)/,\
25 $(sort $(dir $(wildcard $(srcdir)/*/)))))
26
27# Recursion
28__headers: $(subdirs)
29
30PHONY += $(subdirs)
31$(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.
36skip-inst := $(if $(filter %/uapi,$(obj)),1)
37
38ifeq ($(skip-inst),)
39
40# Kbuild file is optional
41kbuild-file := $(srctree)/$(obj)/Kbuild
42-include $(kbuild-file)
43
44installdir := $(INSTALL_HDR_PATH)/$(dst)
45gendir := $(objtree)/$(subst include/,include/generated/,$(obj))
46header-files := $(notdir $(wildcard $(srcdir)/*.h))
47header-files += $(notdir $(wildcard $(srcdir)/*.agh))
48header-files := $(filter-out $(no-export-headers), $(header-files))
49genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
50genhdr-files := $(filter-out $(header-files), $(genhdr-files))
51
52# files used to track state of install/check
53install-file := $(installdir)/.install
54check-file := $(installdir)/.check
55
56# all headers files for this dir
57all-files := $(header-files) $(genhdr-files)
58output-files := $(addprefix $(installdir)/, $(all-files))
59
60ifneq ($(mandatory-y),)
61missing := $(filter-out $(all-files),$(mandatory-y))
62ifneq ($(missing),)
63$(error Some mandatory headers ($(missing)) are missing in $(obj))
64endif
65endif
66
67# Work out what needs to be removed
68oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
69unwanted := $(filter-out $(all-files),$(oldheaders))
70
71# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
72unwanted-file := $(addprefix $(installdir)/, $(unwanted))
73
74printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
75
76quiet_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
83quiet_cmd_remove = REMOVE $(unwanted)
84 cmd_remove = rm -f $(unwanted-file)
85
86quiet_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
95ifndef HDRCHECK
96# Rules for installing headers
97__headers: $(install-file)
98 @:
99
100targets += $(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
108else
109__headers: $(check-file)
110 @:
111
112targets += $(check-file)
113$(check-file): scripts/headers_check.pl $(output-files) FORCE
114 $(call if_changed,check)
115
116endif
117
118cmd_files := $(wildcard \
119 $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
120
121ifneq ($(cmd_files),)
122 include $(cmd_files)
123endif
124
125endif # skip-inst
126
127PHONY += FORCE
128FORCE: ;
129
130.PHONY: $(PHONY)
1# ==========================================================================
2# Installing headers
3#
4# header-y - list files to be installed. They are preprocessed
5# to remove __KERNEL__ section of the file
6# genhdr-y - Same as header-y but in a generated directory
7#
8# ==========================================================================
9
10# generated header directory
11gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
12
13kbuild-file := $(srctree)/$(obj)/Kbuild
14include $(kbuild-file)
15
16# called may set destination dir (when installing to asm/)
17_dst := $(if $(destination-y),$(destination-y),$(if $(dst),$(dst),$(obj)))
18
19old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
20ifneq ($(wildcard $(old-kbuild-file)),)
21include $(old-kbuild-file)
22endif
23
24include scripts/Kbuild.include
25
26installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
27
28header-y := $(sort $(header-y))
29subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
30header-y := $(filter-out %/, $(header-y))
31
32# files used to track state of install/check
33install-file := $(installdir)/.install
34check-file := $(installdir)/.check
35
36# generic-y list all files an architecture uses from asm-generic
37# Use this to build a list of headers which require a wrapper
38wrapper-files := $(filter $(header-y), $(generic-y))
39
40srcdir := $(srctree)/$(obj)
41gendir := $(objtree)/$(gen)
42
43oldsrcdir := $(srctree)/$(subst /uapi,,$(obj))
44
45# all headers files for this dir
46header-y := $(filter-out $(generic-y), $(header-y))
47all-files := $(header-y) $(genhdr-y) $(wrapper-files)
48output-files := $(addprefix $(installdir)/, $(all-files))
49
50input-files1 := $(foreach hdr, $(header-y), \
51 $(if $(wildcard $(srcdir)/$(hdr)), \
52 $(wildcard $(srcdir)/$(hdr))) \
53 )
54input-files1-name := $(notdir $(input-files1))
55input-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 ))
61input-files2-name := $(notdir $(input-files2))
62input-files3 := $(foreach hdr, $(genhdr-y), \
63 $(if $(wildcard $(gendir)/$(hdr)), \
64 $(wildcard $(gendir)/$(hdr)), \
65 $(error Missing generated UAPI file $(gendir)/$(hdr)) \
66 ))
67input-files3-name := $(notdir $(input-files3))
68
69# Work out what needs to be removed
70oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
71unwanted := $(filter-out $(all-files),$(oldheaders))
72
73# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
74unwanted-file := $(addprefix $(installdir)/, $(unwanted))
75
76printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
77
78quiet_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)/$$F; \
86 done; \
87 touch $@
88
89quiet_cmd_remove = REMOVE $(unwanted)
90 cmd_remove = rm -f $(unwanted-file)
91
92quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
93# Headers list can be pretty long, xargs helps to avoid
94# the "Argument list too long" error.
95 cmd_check = for f in $(all-files); do \
96 echo "$(installdir)/$${f}"; done \
97 | xargs \
98 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
99 touch $@
100
101PHONY += __headersinst __headerscheck
102
103ifndef HDRCHECK
104# Rules for installing headers
105__headersinst: $(subdirs) $(install-file)
106 @:
107
108targets += $(install-file)
109$(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)
113
114else
115__headerscheck: $(subdirs) $(check-file)
116 @:
117
118targets += $(check-file)
119$(check-file): scripts/headers_check.pl $(output-files) FORCE
120 $(call if_changed,check)
121
122endif
123
124# Recursion
125.PHONY: $(subdirs)
126$(subdirs):
127 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
128
129targets := $(wildcard $(sort $(targets)))
130cmd_files := $(wildcard \
131 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
132
133ifneq ($(cmd_files),)
134 include $(cmd_files)
135endif
136
137.PHONY: $(PHONY)
138PHONY += FORCE
139FORCE: ;