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# called may set destination dir (when installing to asm/)
11_dst := $(or $(destination-y),$(dst),$(obj))
12
13# generated header directory
14gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
15
16kbuild-file := $(srctree)/$(obj)/Kbuild
17include $(kbuild-file)
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		   $(or \
52			$(wildcard $(srcdir)/$(hdr)), \
53			$(wildcard $(oldsrcdir)/$(hdr)), \
54			$(error Missing UAPI file $(srcdir)/$(hdr)) \
55		   )) \
56		 $(foreach hdr, $(genhdr-y), \
57		   $(or \
58			$(wildcard $(gendir)/$(hdr)), \
59			$(error Missing generated UAPI file $(gendir)/$(hdr)) \
60		   ))
61
62# Work out what needs to be removed
63oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
64unwanted      := $(filter-out $(all-files),$(oldheaders))
65
66# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
67unwanted-file := $(addprefix $(installdir)/, $(unwanted))
68
69printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
70
71quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
72                            file$(if $(word 2, $(all-files)),s))
73      cmd_install = \
74        $(PERL) $< $(installdir) $(SRCARCH) $(input-files); \
75        for F in $(wrapper-files); do                                   \
76                echo "\#include <asm-generic/$$F>" > $(installdir)/$$F;    \
77        done;                                                           \
78        touch $@
79
80quiet_cmd_remove = REMOVE  $(unwanted)
81      cmd_remove = rm -f $(unwanted-file)
82
83quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
84# Headers list can be pretty long, xargs helps to avoid
85# the "Argument list too long" error.
86      cmd_check = for f in $(all-files); do                          \
87                  echo "$(installdir)/$${f}"; done                      \
88                  | xargs                                            \
89                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
90	          touch $@
91
92PHONY += __headersinst __headerscheck
93
94ifndef HDRCHECK
95# Rules for installing headers
96__headersinst: $(subdirs) $(install-file)
97	@:
98
99targets += $(install-file)
100$(install-file): scripts/headers_install.pl $(input-files) FORCE
101	$(if $(unwanted),$(call cmd,remove),)
102	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
103	$(call if_changed,install)
104
105else
106__headerscheck: $(subdirs) $(check-file)
107	@:
108
109targets += $(check-file)
110$(check-file): scripts/headers_check.pl $(output-files) FORCE
111	$(call if_changed,check)
112
113endif
114
115# Recursion
116hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
117.PHONY: $(subdirs)
118$(subdirs):
119	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
120
121targets := $(wildcard $(sort $(targets)))
122cmd_files := $(wildcard \
123             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
124
125ifneq ($(cmd_files),)
126	include $(cmd_files)
127endif
128
129.PHONY: $(PHONY)
130PHONY += FORCE
131FORCE: ;
132