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84 lines
2.9 KiB
84 lines
2.9 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# ========================================================================== |
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# Installing headers |
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# |
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# All headers under include/uapi, include/generated/uapi, |
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# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are |
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# exported. |
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# They are preprocessed to remove __KERNEL__ section of the file. |
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# |
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# ========================================================================== |
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PHONY := __headers |
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__headers: |
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include $(srctree)/scripts/Kbuild.include |
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src := $(srctree)/$(obj) |
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gen := $(objtree)/$(subst include/,include/generated/,$(obj)) |
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dst := usr/include |
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-include $(src)/Kbuild |
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# $(filter %/, ...) is a workaround for GNU Make <= 4.2.1, where |
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# $(wildcard $(src)/*/) contains not only directories but also regular files. |
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src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/))) |
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gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/))) |
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all-subdirs := $(sort $(src-subdirs) $(gen-subdirs)) |
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src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h')) |
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src-headers := $(filter-out $(no-export-headers), $(src-headers)) |
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gen-headers := $(if $(gen-subdirs), $(shell cd $(gen) && find $(gen-subdirs) -name '*.h')) |
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gen-headers := $(filter-out $(no-export-headers), $(gen-headers)) |
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# If the same header is exported from source and generated directories, |
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# the former takes precedence, but this should be warned. |
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duplicated := $(filter $(gen-headers), $(src-headers)) |
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$(if $(duplicated), $(warning duplicated header export: $(duplicated))) |
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gen-headers := $(filter-out $(duplicated), $(gen-headers)) |
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# Add dst path prefix |
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all-subdirs := $(addprefix $(dst)/, $(all-subdirs)) |
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src-headers := $(addprefix $(dst)/, $(src-headers)) |
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gen-headers := $(addprefix $(dst)/, $(gen-headers)) |
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all-headers := $(src-headers) $(gen-headers) |
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# Work out what needs to be removed |
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old-subdirs := $(wildcard $(all-subdirs)) |
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old-headers := $(if $(old-subdirs),$(shell find $(old-subdirs) -name '*.h')) |
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unwanted := $(filter-out $(all-headers), $(old-headers)) |
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# Create directories |
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existing-dirs := $(sort $(dir $(old-headers))) |
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wanted-dirs := $(sort $(dir $(all-headers))) |
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new-dirs := $(filter-out $(existing-dirs), $(wanted-dirs)) |
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$(if $(new-dirs), $(shell mkdir -p $(new-dirs))) |
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# Rules |
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quiet_cmd_install = HDRINST $@ |
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cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@ |
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$(src-headers): $(dst)/%.h: $(src)/%.h $(srctree)/scripts/headers_install.sh FORCE |
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$(call if_changed,install) |
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$(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctree)/scripts/headers_install.sh FORCE |
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$(call if_changed,install) |
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quiet_cmd_remove = REMOVE $(unwanted) |
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cmd_remove = rm -f $(unwanted) |
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__headers: $(all-headers) |
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ifneq ($(unwanted),) |
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$(call cmd,remove) |
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endif |
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@: |
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existing-headers := $(filter $(old-headers), $(all-headers)) |
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-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd) |
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PHONY += FORCE |
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FORCE: |
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.PHONY: $(PHONY)
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