| 1 | # ========================================================================== |
| 2 | # Installing headers |
| 3 | # |
| 4 | # All headers under include/uapi, include/generated/uapi, |
| 5 | # arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are |
| 6 | # exported. |
| 7 | # They are preprocessed to remove __KERNEL__ section of the file. |
| 8 | # |
| 9 | # ========================================================================== |
| 10 | |
| 11 | PHONY := __headers |
| 12 | __headers: |
| 13 | |
| 14 | include scripts/Kbuild.include |
| 15 | |
| 16 | srcdir := $(srctree)/$(obj) |
| 17 | subdirs := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.)) |
| 18 | # caller may set destination dir (when installing to asm/) |
| 19 | _dst := $(if $(dst),$(dst),$(obj)) |
| 20 | |
| 21 | # Recursion |
| 22 | __headers: $(subdirs) |
| 23 | |
| 24 | .PHONY: $(subdirs) |
| 25 | $(subdirs): |
| 26 | $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@ |
| 27 | |
| 28 | # Skip header install/check for include/uapi and arch/$(hdr-arch)/include/uapi. |
| 29 | # We have only sub-directories there. |
| 30 | skip-inst := $(if $(filter %/uapi,$(obj)),1) |
| 31 | |
| 32 | ifeq ($(skip-inst),) |
| 33 | |
| 34 | # generated header directory |
| 35 | gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj))) |
| 36 | |
| 37 | # Kbuild file is optional |
| 38 | kbuild-file := $(srctree)/$(obj)/Kbuild |
| 39 | -include $(kbuild-file) |
| 40 | |
| 41 | old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild |
| 42 | ifneq ($(wildcard $(old-kbuild-file)),) |
| 43 | include $(old-kbuild-file) |
| 44 | endif |
| 45 | |
| 46 | installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst)) |
| 47 | |
| 48 | gendir := $(objtree)/$(gen) |
| 49 | header-files := $(notdir $(wildcard $(srcdir)/*.h)) |
| 50 | header-files += $(notdir $(wildcard $(srcdir)/*.agh)) |
| 51 | header-files := $(filter-out $(no-export-headers), $(header-files)) |
| 52 | genhdr-files := $(notdir $(wildcard $(gendir)/*.h)) |
| 53 | genhdr-files := $(filter-out $(header-files), $(genhdr-files)) |
| 54 | |
| 55 | # files used to track state of install/check |
| 56 | install-file := $(installdir)/.install |
| 57 | check-file := $(installdir)/.check |
| 58 | |
| 59 | # generic-y list all files an architecture uses from asm-generic |
| 60 | # Use this to build a list of headers which require a wrapper |
| 61 | generic-files := $(notdir $(wildcard $(srctree)/include/uapi/asm-generic/*.h)) |
| 62 | wrapper-files := $(filter $(generic-files), $(generic-y)) |
| 63 | wrapper-files := $(filter-out $(header-files), $(wrapper-files)) |
| 64 | |
| 65 | # all headers files for this dir |
| 66 | all-files := $(header-files) $(genhdr-files) $(wrapper-files) |
| 67 | output-files := $(addprefix $(installdir)/, $(all-files)) |
| 68 | |
| 69 | ifneq ($(mandatory-y),) |
| 70 | missing := $(filter-out $(all-files),$(mandatory-y)) |
| 71 | ifneq ($(missing),) |
| 72 | $(error Some mandatory headers ($(missing)) are missing in $(obj)) |
| 73 | endif |
| 74 | endif |
| 75 | |
| 76 | # Work out what needs to be removed |
| 77 | oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) |
| 78 | unwanted := $(filter-out $(all-files),$(oldheaders)) |
| 79 | |
| 80 | # Prefix unwanted with full paths to $(INSTALL_HDR_PATH) |
| 81 | unwanted-file := $(addprefix $(installdir)/, $(unwanted)) |
| 82 | |
| 83 | printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) |
| 84 | |
| 85 | quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\ |
| 86 | file$(if $(word 2, $(all-files)),s)) |
| 87 | cmd_install = \ |
| 88 | $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \ |
| 89 | $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \ |
| 90 | for F in $(wrapper-files); do \ |
| 91 | echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \ |
| 92 | done; \ |
| 93 | touch $@ |
| 94 | |
| 95 | quiet_cmd_remove = REMOVE $(unwanted) |
| 96 | cmd_remove = rm -f $(unwanted-file) |
| 97 | |
| 98 | quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files) |
| 99 | # Headers list can be pretty long, xargs helps to avoid |
| 100 | # the "Argument list too long" error. |
| 101 | cmd_check = for f in $(all-files); do \ |
| 102 | echo "$(installdir)/$${f}"; done \ |
| 103 | | xargs \ |
| 104 | $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \ |
| 105 | touch $@ |
| 106 | |
| 107 | ifndef HDRCHECK |
| 108 | # Rules for installing headers |
| 109 | __headers: $(install-file) |
| 110 | @: |
| 111 | |
| 112 | targets += $(install-file) |
| 113 | $(install-file): scripts/headers_install.sh \ |
| 114 | $(addprefix $(srcdir)/,$(header-files)) \ |
| 115 | $(addprefix $(gendir)/,$(genhdr-files)) FORCE |
| 116 | $(if $(unwanted),$(call cmd,remove),) |
| 117 | $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@))) |
| 118 | $(call if_changed,install) |
| 119 | |
| 120 | else |
| 121 | __headers: $(check-file) |
| 122 | @: |
| 123 | |
| 124 | targets += $(check-file) |
| 125 | $(check-file): scripts/headers_check.pl $(output-files) FORCE |
| 126 | $(call if_changed,check) |
| 127 | |
| 128 | endif |
| 129 | |
| 130 | targets := $(wildcard $(sort $(targets))) |
| 131 | cmd_files := $(wildcard \ |
| 132 | $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| 133 | |
| 134 | ifneq ($(cmd_files),) |
| 135 | include $(cmd_files) |
| 136 | endif |
| 137 | |
| 138 | endif # skip-inst |
| 139 | |
| 140 | .PHONY: $(PHONY) |
| 141 | PHONY += FORCE |
| 142 | FORCE: ; |