Root/scripts/Makefile.headersinst

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
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# objhdr-y - Same as header-y but for generated files
7# genhdr-y - Same as objhdr-y but in a generated/ directory
8#
9# ==========================================================================
10
11# called may set destination dir (when installing to asm/)
12_dst := $(if $(dst),$(dst),$(obj))
13
14# generated header directory
15gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
16
17kbuild-file := $(srctree)/$(obj)/Kbuild
18include $(kbuild-file)
19
20_dst := $(if $(destination-y),$(destination-y),$(_dst))
21
22include scripts/Kbuild.include
23
24install := $(INSTALL_HDR_PATH)/$(_dst)
25
26header-y := $(sort $(header-y))
27subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
28header-y := $(filter-out %/, $(header-y))
29
30# files used to track state of install/check
31install-file := $(install)/.install
32check-file := $(install)/.check
33
34# generic-y list all files an architecture uses from asm-generic
35# Use this to build a list of headers which require a wrapper
36wrapper-files := $(filter $(header-y), $(generic-y))
37
38# all headers files for this dir
39header-y := $(filter-out $(generic-y), $(header-y))
40all-files := $(header-y) $(objhdr-y) $(genhdr-y) $(wrapper-files)
41input-files := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
42                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y)) \
43                 $(addprefix $(objtree)/$(gen)/,$(genhdr-y))
44output-files := $(addprefix $(install)/, $(all-files))
45
46# Work out what needs to be removed
47oldheaders := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
48unwanted := $(filter-out $(all-files),$(oldheaders))
49
50# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
51unwanted-file := $(addprefix $(install)/, $(unwanted))
52
53printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
54
55quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
56                            file$(if $(word 2, $(all-files)),s))
57      cmd_install = \
58        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
59        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
60        $(PERL) $< $(objtree)/$(gen) $(install) $(SRCARCH) $(genhdr-y); \
61        for F in $(wrapper-files); do \
62                echo "\#include <asm-generic/$$F>" > $(install)/$$F; \
63        done; \
64        touch $@
65
66quiet_cmd_remove = REMOVE $(unwanted)
67      cmd_remove = rm -f $(unwanted-file)
68
69quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
70# Headers list can be pretty long, xargs helps to avoid
71# the "Argument list too long" error.
72      cmd_check = for f in $(all-files); do \
73                  echo "$(install)/$${f}"; done \
74                  | xargs \
75                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
76              touch $@
77
78PHONY += __headersinst __headerscheck
79
80ifndef HDRCHECK
81# Rules for installing headers
82__headersinst: $(subdirs) $(install-file)
83    @:
84
85targets += $(install-file)
86$(install-file): scripts/headers_install.pl $(input-files) FORCE
87    $(if $(unwanted),$(call cmd,remove),)
88    $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
89    $(call if_changed,install)
90
91else
92__headerscheck: $(subdirs) $(check-file)
93    @:
94
95targets += $(check-file)
96$(check-file): scripts/headers_check.pl $(output-files) FORCE
97    $(call if_changed,check)
98
99endif
100
101# Recursion
102hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
103.PHONY: $(subdirs)
104$(subdirs):
105    $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
106
107targets := $(wildcard $(sort $(targets)))
108cmd_files := $(wildcard \
109             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
110
111ifneq ($(cmd_files),)
112    include $(cmd_files)
113endif
114
115.PHONY: $(PHONY)
116PHONY += FORCE
117FORCE: ;
118

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