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scripts/mkutf8data is used only when regenerating utf8data.h, which never happens in the normal kernel build. However, it is irrespectively built if CONFIG_UNICODE is enabled. Moreover, there is no good reason for it to reside in the scripts/ directory since it is only used in fs/unicode/. Hence, move it from scripts/ to fs/unicode/. In some cases, we bypass build artifacts in the normal build. The conventional way to do so is to surround the code with ifdef REGENERATE_*. For example, -7373f4f83c("kbuild: add implicit rules for parser generation") -6aaf49b495("crypto: arm,arm64 - Fix random regeneration of S_shipped") I rewrote the rule in a more kbuild'ish style. In the normal build, utf8data.h is just shipped from the check-in file. $ make [ snip ] SHIPPED fs/unicode/utf8data.h CC fs/unicode/utf8-norm.o CC fs/unicode/utf8-core.o CC fs/unicode/utf8-selftest.o AR fs/unicode/built-in.a If you want to generate utf8data.h based on UCD, put *.txt files into fs/unicode/, then pass REGENERATE_UTF8DATA=1 from the command line. The mkutf8data tool will be automatically compiled to generate the utf8data.h from the *.txt files. $ make REGENERATE_UTF8DATA=1 [ snip ] HOSTCC fs/unicode/mkutf8data GEN fs/unicode/utf8data.h CC fs/unicode/utf8-norm.o CC fs/unicode/utf8-core.o CC fs/unicode/utf8-selftest.o AR fs/unicode/built-in.a I renamed the check-in utf8data.h to utf8data.h_shipped so that this will work for the out-of-tree build. You can update it based on the latest UCD like this: $ make REGENERATE_UTF8DATA=1 fs/unicode/ $ cp fs/unicode/utf8data.h fs/unicode/utf8data.h_shipped Also, I added entries to .gitignore and dontdiff. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
39 lines
1.0 KiB
Makefile
39 lines
1.0 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_UNICODE) += unicode.o
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obj-$(CONFIG_UNICODE_NORMALIZATION_SELFTEST) += utf8-selftest.o
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unicode-y := utf8-norm.o utf8-core.o
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$(obj)/utf8-norm.o: $(obj)/utf8data.h
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# In the normal build, the checked-in utf8data.h is just shipped.
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#
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# To generate utf8data.h from UCD, put *.txt files in this directory
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# and pass REGENERATE_UTF8DATA=1 from the command line.
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ifdef REGENERATE_UTF8DATA
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quiet_cmd_utf8data = GEN $@
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cmd_utf8data = $< \
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-a $(srctree)/$(src)/DerivedAge.txt \
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-c $(srctree)/$(src)/DerivedCombiningClass.txt \
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-p $(srctree)/$(src)/DerivedCoreProperties.txt \
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-d $(srctree)/$(src)/UnicodeData.txt \
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-f $(srctree)/$(src)/CaseFolding.txt \
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-n $(srctree)/$(src)/NormalizationCorrections.txt \
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-t $(srctree)/$(src)/NormalizationTest.txt \
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-o $@
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$(obj)/utf8data.h: $(obj)/mkutf8data $(filter %.txt, $(cmd_utf8data)) FORCE
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$(call if_changed,utf8data)
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else
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$(obj)/utf8data.h: $(src)/utf8data.h_shipped FORCE
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$(call if_changed,shipped)
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endif
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targets += utf8data.h
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hostprogs-y += mkutf8data
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