1 # SPDX-License-Identifier: GPL-2.0
2 # ==========================================================================
5 # All headers under include/uapi, include/generated/uapi,
6 # arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
8 # They are preprocessed to remove __KERNEL__ section of the file.
10 # ==========================================================================
15 include scripts/Kbuild.include
17 srcdir := $(srctree)/$(obj)
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
23 subdirs := $(patsubst $(srcdir)/%/,%,\
24 $(filter-out $(srcdir)/,\
25 $(sort $(dir $(wildcard $(srcdir)/*/)))))
32 $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@
34 # Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi.
35 # We have only sub-directories there.
36 skip-inst := $(if $(filter %/uapi,$(obj)),1)
40 # Kbuild file is optional
41 kbuild-file := $(srctree)/$(obj)/Kbuild
42 -include $(kbuild-file)
44 installdir := $(INSTALL_HDR_PATH)/$(dst)
45 gendir := $(objtree)/$(subst include/,include/generated/,$(obj))
46 header-files := $(notdir $(wildcard $(srcdir)/*.h))
47 header-files := $(filter-out $(no-export-headers), $(header-files))
48 genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
49 genhdr-files := $(filter-out $(header-files), $(genhdr-files))
51 # files used to track state of install/check
52 install-file := $(installdir)/.install
53 check-file := $(installdir)/.check
55 # all headers files for this dir
56 all-files := $(header-files) $(genhdr-files)
57 output-files := $(addprefix $(installdir)/, $(all-files))
59 # Work out what needs to be removed
60 oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
61 unwanted := $(filter-out $(all-files),$(oldheaders))
63 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
64 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
66 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
68 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
69 file$(if $(word 2, $(all-files)),s))
71 $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
72 $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
75 quiet_cmd_remove = REMOVE $(unwanted)
76 cmd_remove = rm -f $(unwanted-file)
78 quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
79 # Headers list can be pretty long, xargs helps to avoid
80 # the "Argument list too long" error.
81 cmd_check = for f in $(all-files); do \
82 echo "$(installdir)/$${f}"; done \
84 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
88 # Rules for installing headers
89 __headers: $(install-file)
92 targets += $(install-file)
93 $(install-file): scripts/headers_install.sh \
94 $(addprefix $(srcdir)/,$(header-files)) \
95 $(addprefix $(gendir)/,$(genhdr-files)) FORCE
96 $(if $(unwanted),$(call cmd,remove),)
97 $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
98 $(call if_changed,install)
101 __headers: $(check-file)
104 targets += $(check-file)
105 $(check-file): scripts/headers_check.pl $(output-files) FORCE
106 $(call if_changed,check)
110 cmd_files := $(wildcard \
111 $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
113 ifneq ($(cmd_files),)