| 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 | |
| 12 | PHONY := __headers |
| 13 | __headers: |
| 14 | |
| 15 | include scripts/Kbuild.include |
| 16 | |
| 17 | srcdir := $(srctree)/$(obj) |
| 18 | |
| 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 |
| 22 | # with fakechroot. |
| 23 | subdirs := $(patsubst $(srcdir)/%/,%,\ |
| 24 | $(filter-out $(srcdir)/,\ |
| 25 | $(sort $(dir $(wildcard $(srcdir)/*/))))) |
| 26 | |
| 27 | # Recursion |
| 28 | __headers: $(subdirs) |
| 29 | |
| 30 | PHONY += $(subdirs) |
| 31 | $(subdirs): |
| 32 | $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@ |
| 33 | |
| 34 | # Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi. |
| 35 | # We have only sub-directories there. |
| 36 | skip-inst := $(if $(filter %/uapi,$(obj)),1) |
| 37 | |
| 38 | ifeq ($(skip-inst),) |
| 39 | |
| 40 | # Kbuild file is optional |
| 41 | kbuild-file := $(srctree)/$(obj)/Kbuild |
| 42 | -include $(kbuild-file) |
| 43 | |
| 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)) |
| 50 | |
| 51 | # files used to track state of install/check |
| 52 | install-file := $(installdir)/.install |
| 53 | check-file := $(installdir)/.check |
| 54 | |
| 55 | # all headers files for this dir |
| 56 | all-files := $(header-files) $(genhdr-files) |
| 57 | output-files := $(addprefix $(installdir)/, $(all-files)) |
| 58 | |
| 59 | # Work out what needs to be removed |
| 60 | oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) |
| 61 | unwanted := $(filter-out $(all-files),$(oldheaders)) |
| 62 | |
| 63 | # Prefix unwanted with full paths to $(INSTALL_HDR_PATH) |
| 64 | unwanted-file := $(addprefix $(installdir)/, $(unwanted)) |
| 65 | |
| 66 | printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) |
| 67 | |
| 68 | quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\ |
| 69 | file$(if $(word 2, $(all-files)),s)) |
| 70 | cmd_install = \ |
| 71 | $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \ |
| 72 | $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \ |
| 73 | touch $@ |
| 74 | |
| 75 | quiet_cmd_remove = REMOVE $(unwanted) |
| 76 | cmd_remove = rm -f $(unwanted-file) |
| 77 | |
| 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 \ |
| 83 | | xargs \ |
| 84 | $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \ |
| 85 | touch $@ |
| 86 | |
| 87 | ifndef HDRCHECK |
| 88 | # Rules for installing headers |
| 89 | __headers: $(install-file) |
| 90 | @: |
| 91 | |
| 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) |
| 99 | |
| 100 | else |
| 101 | __headers: $(check-file) |
| 102 | @: |
| 103 | |
| 104 | targets += $(check-file) |
| 105 | $(check-file): scripts/headers_check.pl $(output-files) FORCE |
| 106 | $(call if_changed,check) |
| 107 | |
| 108 | endif |
| 109 | |
| 110 | cmd_files := $(wildcard \ |
| 111 | $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) |
| 112 | |
| 113 | ifneq ($(cmd_files),) |
| 114 | include $(cmd_files) |
| 115 | endif |
| 116 | |
| 117 | endif # skip-inst |
| 118 | |
| 119 | PHONY += FORCE |
| 120 | FORCE: ; |
| 121 | |
| 122 | .PHONY: $(PHONY) |