1# SPDX-License-Identifier: GPL-2.0
 2# ==========================================================================
 3# Installing headers
 4#
 5# All headers under include/uapi, include/generated/uapi,
 6# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
 7# exported.
 8# They are preprocessed to remove __KERNEL__ section of the file.
 9#
10# ==========================================================================
11
12PHONY := __headers
13__headers:
14
15include $(srctree)/scripts/Kbuild.include
16
17src := $(srctree)/$(obj)
18gen := $(objtree)/$(subst include/,include/generated/,$(obj))
19dst := usr/include
20
21-include $(src)/Kbuild
22
23# $(filter %/, ...) is a workaround for GNU Make <= 4.2.1, where
24# $(wildcard $(src)/*/) contains not only directories but also regular files.
25src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/)))
26gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/)))
27all-subdirs := $(sort $(src-subdirs) $(gen-subdirs))
28
29src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h'))
30src-headers := $(filter-out $(no-export-headers), $(src-headers))
31gen-headers := $(if $(gen-subdirs), $(shell cd $(gen) && find $(gen-subdirs) -name '*.h'))
32gen-headers := $(filter-out $(no-export-headers), $(gen-headers))
33
34# If the same header is exported from source and generated directories,
35# the former takes precedence, but this should be warned.
36duplicated := $(filter $(gen-headers), $(src-headers))
37$(if $(duplicated), $(warning duplicated header export: $(duplicated)))
38
39gen-headers := $(filter-out $(duplicated), $(gen-headers))
40
41# Add dst path prefix
42all-subdirs := $(addprefix $(dst)/, $(all-subdirs))
43src-headers := $(addprefix $(dst)/, $(src-headers))
44gen-headers := $(addprefix $(dst)/, $(gen-headers))
45all-headers := $(src-headers) $(gen-headers)
46
47# Work out what needs to be removed
48old-subdirs := $(wildcard $(all-subdirs))
49old-headers := $(if $(old-subdirs),$(shell find $(old-subdirs) -name '*.h'))
50unwanted    := $(filter-out $(all-headers), $(old-headers))
51
52# Create directories
53existing-dirs := $(sort $(dir $(old-headers)))
54wanted-dirs   := $(sort $(dir $(all-headers)))
55new-dirs      := $(filter-out $(existing-dirs), $(wanted-dirs))
56$(if $(new-dirs), $(shell mkdir -p $(new-dirs)))
57
58# Rules
 
 
 
59quiet_cmd_install = HDRINST $@
60      cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@
61
62$(src-headers): $(dst)/%.h: $(src)/%.h $(srctree)/scripts/headers_install.sh FORCE
63	$(call if_changed,install)
64
65$(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctree)/scripts/headers_install.sh FORCE
66	$(call if_changed,install)
67
68quiet_cmd_remove = REMOVE  $(unwanted)
69      cmd_remove = rm -f $(unwanted)
70
71__headers: $(all-headers)
72ifneq ($(unwanted),)
73	$(call cmd,remove)
74endif
75	@:
76
77existing-headers := $(filter $(old-headers), $(all-headers))
78
79-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
80
81PHONY += FORCE
82FORCE:
83
84.PHONY: $(PHONY)

  1# SPDX-License-Identifier: GPL-2.0
  2# ==========================================================================
  3# Installing headers
  4#
  5# All headers under include/uapi, include/generated/uapi,
  6# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
  7# exported.
  8# They are preprocessed to remove __KERNEL__ section of the file.
  9#
 10# ==========================================================================
 11
 12PHONY := __headers
 13__headers:
 14
 15include scripts/Kbuild.include
 16
 17src := $(srctree)/$(obj)
 18gen := $(objtree)/$(subst include/,include/generated/,$(obj))
 19dst := usr/include
 20
 21-include $(src)/Kbuild
 22
 23# $(filter %/, ...) is a workaround for GNU Make <= 4.2.1, where
 24# $(wildcard $(src)/*/) contains not only directories but also regular files.
 25src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/)))
 26gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/)))
 27all-subdirs := $(sort $(src-subdirs) $(gen-subdirs))
 28
 29src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h'))
 30src-headers := $(filter-out $(no-export-headers), $(src-headers))
 31gen-headers := $(if $(gen-subdirs), $(shell cd $(gen) && find $(gen-subdirs) -name '*.h'))
 32gen-headers := $(filter-out $(no-export-headers), $(gen-headers))
 33
 34# If the same header is exported from source and generated directories,
 35# the former takes precedence, but this should be warned.
 36duplicated := $(filter $(gen-headers), $(src-headers))
 37$(if $(duplicated), $(warning duplicated header export: $(duplicated)))
 38
 39gen-headers := $(filter-out $(duplicated), $(gen-headers))
 40
 41# Add dst path prefix
 42all-subdirs := $(addprefix $(dst)/, $(all-subdirs))
 43src-headers := $(addprefix $(dst)/, $(src-headers))
 44gen-headers := $(addprefix $(dst)/, $(gen-headers))
 45all-headers := $(src-headers) $(gen-headers)
 46
 47# Work out what needs to be removed
 48old-subdirs := $(wildcard $(all-subdirs))
 49old-headers := $(if $(old-subdirs),$(shell find $(old-subdirs) -name '*.h'))
 50unwanted    := $(filter-out $(all-headers), $(old-headers))
 51
 52# Create directories
 53existing-dirs := $(sort $(dir $(old-headers)))
 54wanted-dirs   := $(sort $(dir $(all-headers)))
 55new-dirs      := $(filter-out $(existing-dirs), $(wanted-dirs))
 56$(if $(new-dirs), $(shell mkdir -p $(new-dirs)))
 57
 58# Rules
 59
 60ifndef HDRCHECK
 61
 62quiet_cmd_install = HDRINST $@
 63      cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@
 64
 65$(src-headers): $(dst)/%.h: $(src)/%.h $(srctree)/scripts/headers_install.sh FORCE
 66	$(call if_changed,install)
 67
 68$(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctree)/scripts/headers_install.sh FORCE
 69	$(call if_changed,install)
 70
 71quiet_cmd_remove = REMOVE  $(unwanted)
 72      cmd_remove = rm -f $(unwanted)
 73
 74__headers: $(all-headers)
 75ifneq ($(unwanted),)
 76	$(call cmd,remove)
 77endif
 78	@:
 79
 80existing-headers := $(filter $(old-headers), $(all-headers))
 81
 82-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd)
 83
 84else
 85
 86quiet_cmd_check = HDRCHK  $<
 87      cmd_check = $(PERL) $(srctree)/scripts/headers_check.pl $(dst) $(SRCARCH) $<; touch $@
 88
 89check-files := $(addsuffix .chk, $(all-headers))
 90
 91$(check-files): $(dst)/%.chk : $(dst)/% $(srctree)/scripts/headers_check.pl
 92	$(call cmd,check)
 93
 94__headers: $(check-files)
 95	@:
 96
 97endif
 98
 99PHONY += FORCE
100FORCE:
101
102.PHONY: $(PHONY)