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Since commitd5470d1443("kbuild: re-implement Makefile.headersinst without recursion"), headers_install emits an ugly warning. $ make headers_install [ snip ] UPD include/generated/uapi/linux/version.h find: ‘./include/uapi/Kbuild’: No such file or directory HDRINST usr/include/video/uvesafb.h ... This happens for GNU Make <= 4.2.1 When I wrote that commit, I missed this warning because I was using the state-of-the-art Make version compiled from the git tree. $(wildcard $(src)/*/) is intended to match to only existing directories since it has a trailing slash, but actually matches to regular files too. (include/uapi/Kbuild in this case) This is a bug of GNU Make, and was fixed by: | commit b7acb10e86dc8f5fdf2a2bbd87e1059c315e31d6 | Author: spagoveanu@gmail.com <spagoveanu@gmail.com> | Date: Wed Jun 20 02:03:48 2018 +0300 | | * src/dir.c: Preserve glob d_type field We need to cater to old Make versions. Add '$(filter %/,...) to filter out the regular files. Fixes:d5470d1443("kbuild: re-implement Makefile.headersinst without recursion") Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
103 lines
3.2 KiB
Makefile
103 lines
3.2 KiB
Makefile
# 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 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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ifndef HDRCHECK
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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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else
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quiet_cmd_check = HDRCHK $<
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cmd_check = $(PERL) $(srctree)/scripts/headers_check.pl $(dst) $(SRCARCH) $<; touch $@
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check-files := $(addsuffix .chk, $(all-headers))
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$(check-files): $(dst)/%.chk : $(dst)/% $(srctree)/scripts/headers_check.pl
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$(call cmd,check)
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__headers: $(check-files)
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@:
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endif
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PHONY += FORCE
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FORCE:
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.PHONY: $(PHONY)
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