1 # ==========================================================================
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
8 # ==========================================================================
10 # generated header directory
11 gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
13 kbuild-file := $(srctree)/$(obj)/Kbuild
14 include $(kbuild-file)
16 # called may set destination dir (when installing to asm/)
17 _dst := $(or $(destination-y),$(dst),$(obj))
19 old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
20 ifneq ($(wildcard $(old-kbuild-file)),)
21 include $(old-kbuild-file)
24 include scripts/Kbuild.include
26 installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
28 header-y := $(sort $(header-y))
29 subdirs := $(patsubst %/,%,$(filter %/, $(header-y)))
30 header-y := $(filter-out %/, $(header-y))
32 # files used to track state of install/check
33 install-file := $(installdir)/.install
34 check-file := $(installdir)/.check
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
38 wrapper-files := $(filter $(header-y), $(generic-y))
40 srcdir := $(srctree)/$(obj)
41 gendir := $(objtree)/$(gen)
43 oldsrcdir := $(srctree)/$(subst /uapi,,$(obj))
45 # all headers files for this dir
46 header-y := $(filter-out $(generic-y), $(header-y))
47 all-files := $(header-y) $(genhdr-y) $(wrapper-files)
48 output-files := $(addprefix $(installdir)/, $(all-files))
50 input-files := $(foreach hdr, $(header-y), \
52 $(wildcard $(srcdir)/$(hdr)), \
53 $(wildcard $(oldsrcdir)/$(hdr)), \
54 $(error Missing UAPI file $(srcdir)/$(hdr)) \
56 $(foreach hdr, $(genhdr-y), \
58 $(wildcard $(gendir)/$(hdr)), \
59 $(error Missing generated UAPI file $(gendir)/$(hdr)) \
62 # Work out what needs to be removed
63 oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
64 unwanted := $(filter-out $(all-files),$(oldheaders))
66 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
67 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
69 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
71 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
72 file$(if $(word 2, $(all-files)),s))
74 $(PERL) $< $(installdir) $(SRCARCH) $(input-files); \
75 for F in $(wrapper-files); do \
76 echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \
80 quiet_cmd_remove = REMOVE $(unwanted)
81 cmd_remove = rm -f $(unwanted-file)
83 quiet_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 \
89 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
92 PHONY += __headersinst __headerscheck
95 # Rules for installing headers
96 __headersinst: $(subdirs) $(install-file)
99 targets += $(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)
106 __headerscheck: $(subdirs) $(check-file)
109 targets += $(check-file)
110 $(check-file): scripts/headers_check.pl $(output-files) FORCE
111 $(call if_changed,check)
116 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
119 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
121 targets := $(wildcard $(sort $(targets)))
122 cmd_files := $(wildcard \
123 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
125 ifneq ($(cmd_files),)