| 1 | # ========================================================================== |
| 2 | # Installing headers |
| 3 | # |
| 4 | # header-y - list files to be installed. They are preprocessed |
| 5 | # to remove __KERNEL__ section of the file |
| 6 | # genhdr-y - Same as header-y but in a generated/ directory |
| 7 | # |
| 8 | # ========================================================================== |
| 9 | |
| 10 | # called may set destination dir (when installing to asm/) |
| 11 | _dst := $(or $(destination-y),$(dst),$(obj)) |
| 12 | |
| 13 | # generated header directory |
| 14 | gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj))) |
| 15 | |
| 16 | kbuild-file := $(srctree)/$(obj)/Kbuild |
| 17 | include $(kbuild-file) |
| 18 | |
| 19 | old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild |
| 20 | ifneq ($(wildcard $(old-kbuild-file)),) |
| 21 | include $(old-kbuild-file) |
| 22 | endif |
| 23 | |
| 24 | include scripts/Kbuild.include |
| 25 | |
| 26 | installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst)) |
| 27 | |
| 28 | header-y := $(sort $(header-y)) |
| 29 | subdirs := $(patsubst %/,%,$(filter %/, $(header-y))) |
| 30 | header-y := $(filter-out %/, $(header-y)) |
| 31 | |
| 32 | # files used to track state of install/check |
| 33 | install-file := $(installdir)/.install |
| 34 | check-file := $(installdir)/.check |
| 35 | |
| 36 | # generic-y list all files an architecture uses from asm-generic |
| 37 | # Use this to build a list of headers which require a wrapper |
| 38 | wrapper-files := $(filter $(header-y), $(generic-y)) |
| 39 | |
| 40 | srcdir := $(srctree)/$(obj) |
| 41 | gendir := $(objtree)/$(gen) |
| 42 | |
| 43 | oldsrcdir := $(srctree)/$(subst /uapi,,$(obj)) |
| 44 | |
| 45 | # all headers files for this dir |
| 46 | header-y := $(filter-out $(generic-y), $(header-y)) |
| 47 | all-files := $(header-y) $(genhdr-y) $(wrapper-files) |
| 48 | output-files := $(addprefix $(installdir)/, $(all-files)) |
| 49 | |
| 50 | input-files := $(foreach hdr, $(header-y), \ |
| 51 | $(or \ |
| 52 | $(wildcard $(srcdir)/$(hdr)), \ |
| 53 | $(wildcard $(oldsrcdir)/$(hdr)), \ |
| 54 | $(error Missing UAPI file $(srcdir)/$(hdr)) \ |
| 55 | )) \ |
| 56 | $(foreach hdr, $(genhdr-y), \ |
| 57 | $(or \ |
| 58 | $(wildcard $(gendir)/$(hdr)), \ |
| 59 | $(error Missing generated UAPI file $(gendir)/$(hdr)) \ |
| 60 | )) |
| 61 | |
| 62 | # Work out what needs to be removed |
| 63 | oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) |
| 64 | unwanted := $(filter-out $(all-files),$(oldheaders)) |
| 65 | |
| 66 | # Prefix unwanted with full paths to $(INSTALL_HDR_PATH) |
| 67 | unwanted-file := $(addprefix $(installdir)/, $(unwanted)) |
| 68 | |
| 69 | printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) |
| 70 | |
| 71 | quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\ |
| 72 | file$(if $(word 2, $(all-files)),s)) |
| 73 | cmd_install = \ |
| 74 | $(PERL) $< $(installdir) $(SRCARCH) $(input-files); \ |
| 75 | for F in $(wrapper-files); do \ |
| 76 | echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \ |
| 77 | done; \ |
| 78 | touch $@ |
| 79 | |
| 80 | quiet_cmd_remove = REMOVE $(unwanted) |
| 81 | cmd_remove = rm -f $(unwanted-file) |
| 82 | |
| 83 | quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files) |
| 84 | # Headers list can be pretty long, xargs helps to avoid |
| 85 | # the "Argument list too long" error. |
| 86 | cmd_check = for f in $(all-files); do \ |
| 87 | echo "$(installdir)/$${f}"; done \ |
| 88 | | xargs \ |
| 89 | $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \ |
| 90 | touch $@ |
| 91 | |
| 92 | PHONY += __headersinst __headerscheck |
| 93 | |
| 94 | ifndef HDRCHECK |
| 95 | # Rules for installing headers |
| 96 | __headersinst: $(subdirs) $(install-file) |
| 97 | @: |
| 98 | |
| 99 | targets += $(install-file) |
| 100 | $(install-file): scripts/headers_install.pl $(input-files) FORCE |
| 101 | $(if $(unwanted),$(call cmd,remove),) |
| 102 | $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@))) |
| 103 | $(call if_changed,install) |
| 104 | |
| 105 | else |
| 106 | __headerscheck: $(subdirs) $(check-file) |
| 107 | @: |
| 108 | |
| 109 | targets += $(check-file) |
| 110 | $(check-file): scripts/headers_check.pl $(output-files) FORCE |
| 111 | $(call if_changed,check) |
| 112 | |
| 113 | endif |
| 114 | |
| 115 | # Recursion |
| 116 | hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj |
| 117 | .PHONY: $(subdirs) |
| 118 | $(subdirs): |
| 119 | $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@ |
| 120 | |
| 121 | targets := $(wildcard $(sort $(targets))) |
| 122 | cmd_files := $(wildcard \ |
| 123 | $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
| 124 | |
| 125 | ifneq ($(cmd_files),) |
| 126 | include $(cmd_files) |
| 127 | endif |
| 128 | |
| 129 | .PHONY: $(PHONY) |
| 130 | PHONY += FORCE |
| 131 | FORCE: ; |