Root/scripts/Makefile.headersinst

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-files := $(foreach hdr, $(header-y), \
51           $(if $(wildcard $(srcdir)/$(hdr)), \
52            $(wildcard $(srcdir)/$(hdr)), \
53            $(if $(wildcard $(oldsrcdir)/$(hdr)), \
54                $(wildcard $(oldsrcdir)/$(hdr)), \
55                $(error Missing UAPI file $(srcdir)/$(hdr))) \
56           )) \
57         $(foreach hdr, $(genhdr-y), \
58           $(if $(wildcard $(gendir)/$(hdr)), \
59            $(wildcard $(gendir)/$(hdr)), \
60            $(error Missing generated UAPI file $(gendir)/$(hdr)) \
61           ))
62
63# Work out what needs to be removed
64oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
65unwanted := $(filter-out $(all-files),$(oldheaders))
66
67# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
68unwanted-file := $(addprefix $(installdir)/, $(unwanted))
69
70printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
71
72quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
73                            file$(if $(word 2, $(all-files)),s))
74      cmd_install = \
75        $(PERL) $< $(installdir) $(SRCARCH) $(input-files); \
76        for F in $(wrapper-files); do \
77                echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \
78        done; \
79        touch $@
80
81quiet_cmd_remove = REMOVE $(unwanted)
82      cmd_remove = rm -f $(unwanted-file)
83
84quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
85# Headers list can be pretty long, xargs helps to avoid
86# the "Argument list too long" error.
87      cmd_check = for f in $(all-files); do \
88                  echo "$(installdir)/$${f}"; done \
89                  | xargs \
90                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
91              touch $@
92
93PHONY += __headersinst __headerscheck
94
95ifndef HDRCHECK
96# Rules for installing headers
97__headersinst: $(subdirs) $(install-file)
98    @:
99
100targets += $(install-file)
101$(install-file): scripts/headers_install.pl $(input-files) FORCE
102    $(if $(unwanted),$(call cmd,remove),)
103    $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
104    $(call if_changed,install)
105
106else
107__headerscheck: $(subdirs) $(check-file)
108    @:
109
110targets += $(check-file)
111$(check-file): scripts/headers_check.pl $(output-files) FORCE
112    $(call if_changed,check)
113
114endif
115
116# Recursion
117hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
118.PHONY: $(subdirs)
119$(subdirs):
120    $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
121
122targets := $(wildcard $(sort $(targets)))
123cmd_files := $(wildcard \
124             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
125
126ifneq ($(cmd_files),)
127    include $(cmd_files)
128endif
129
130.PHONY: $(PHONY)
131PHONY += FORCE
132FORCE: ;
133

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