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)/$@
34 # Skip header install/check for include/uapi and arch/$(hdr-arch)/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 += $(notdir $(wildcard $(srcdir)/*.agh))
48 header-files := $(filter-out $(no-export-headers), $(header-files))
49 genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
50 genhdr-files := $(filter-out $(header-files), $(genhdr-files))
52 # files used to track state of install/check
53 install-file := $(installdir)/.install
54 check-file := $(installdir)/.check
56 # all headers files for this dir
57 all-files := $(header-files) $(genhdr-files)
58 output-files := $(addprefix $(installdir)/, $(all-files))
60 ifneq ($(mandatory-y),)
61 missing := $(filter-out $(all-files),$(mandatory-y))
63 $(error Some mandatory headers ($(missing)) are missing in $(obj))
67 # Work out what needs to be removed
68 oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
69 unwanted := $(filter-out $(all-files),$(oldheaders))
71 # Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
72 unwanted-file := $(addprefix $(installdir)/, $(unwanted))
74 printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
76 quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
77 file$(if $(word 2, $(all-files)),s))
79 $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
80 $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
83 quiet_cmd_remove = REMOVE $(unwanted)
84 cmd_remove = rm -f $(unwanted-file)
86 quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
87 # Headers list can be pretty long, xargs helps to avoid
88 # the "Argument list too long" error.
89 cmd_check = for f in $(all-files); do \
90 echo "$(installdir)/$${f}"; done \
92 $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
96 # Rules for installing headers
97 __headers: $(install-file)
100 targets += $(install-file)
101 $(install-file): scripts/headers_install.sh \
102 $(addprefix $(srcdir)/,$(header-files)) \
103 $(addprefix $(gendir)/,$(genhdr-files)) FORCE
104 $(if $(unwanted),$(call cmd,remove),)
105 $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
106 $(call if_changed,install)
109 __headers: $(check-file)
112 targets += $(check-file)
113 $(check-file): scripts/headers_check.pl $(output-files) FORCE
114 $(call if_changed,check)
118 targets := $(wildcard $(sort $(targets)))
119 cmd_files := $(wildcard \
120 $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
122 ifneq ($(cmd_files),)