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 conventianl way to do so is to surround the code with ifdef REGENERATE_*. For example, - 7373f4f83c71 ("kbuild: add implicit rules for parser generation") - 6aaf49b495b4 ("crypto: arm,arm64 - Fix random regeneration of S_shipped") I rewrote the rule in a more kbuild'ish style. It works like this: $ make REGENERATE_UTF8DATA=1 fs/unicode/ [ snip ] HOSTCC fs/unicode/mkutf8data GEN fs/unicode/utf8data.h CC fs/unicode/utf8-norm.o CC fs/unicode/utf8-core.o AR fs/unicode/built-in.a Also, I added utf8data.h to .gitignore and dontdiff. Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> --- Documentation/dontdiff | 1 + fs/unicode/.gitignore | 1 + fs/unicode/Makefile | 37 +++++++++++++++++++++++++----------- fs/unicode/README.utf8data | 10 +++++----- {scripts => fs/unicode}/mkutf8data.c | 0 scripts/Makefile | 1 - 6 files changed, 33 insertions(+), 17 deletions(-) create mode 100644 fs/unicode/.gitignore rename {scripts => fs/unicode}/mkutf8data.c (100%) diff --git a/Documentation/dontdiff b/Documentation/dontdiff index ef25a06..bc353ad 100644 --- a/Documentation/dontdiff +++ b/Documentation/dontdiff @@ -176,6 +176,7 @@ mkprep mkregtable mktables mktree +mkutf8data modpost modules.builtin modules.order diff --git a/fs/unicode/.gitignore b/fs/unicode/.gitignore new file mode 100644 index 0000000..44811fc --- /dev/null +++ b/fs/unicode/.gitignore @@ -0,0 +1 @@ +mkutf8data diff --git a/fs/unicode/Makefile b/fs/unicode/Makefile index 671d31f..1a109b7 100644 --- a/fs/unicode/Makefile +++ b/fs/unicode/Makefile @@ -5,15 +5,30 @@ obj-$(CONFIG_UNICODE_NORMALIZATION_SELFTEST) += utf8-selftest.o unicode-y := utf8-norm.o utf8-core.o -# This rule is not invoked during the kernel compilation. It is used to -# regenerate the utf8data.h header file. -utf8data.h.new: *.txt $(objdir)/scripts/mkutf8data - $(objdir)/scripts/mkutf8data \ - -a DerivedAge.txt \ - -c DerivedCombiningClass.txt \ - -p DerivedCoreProperties.txt \ - -d UnicodeData.txt \ - -f CaseFolding.txt \ - -n NormalizationCorrections.txt \ - -t NormalizationTest.txt \ + +# To regenerate utf8data.h, run the following in the top directory: +# $ make REGENERATE_UTF8DATA=1 fs/unicode/ +ifdef REGENERATE_UTF8DATA + +$(obj)/utf8-norm.o: $(obj)/utf8data.h + +quiet_cmd_utf8data = GEN $@ + cmd_utf8data = $(obj)/mkutf8data \ + -a $(src)/DerivedAge.txt \ + -c $(src)/DerivedCombiningClass.txt \ + -p $(src)/DerivedCoreProperties.txt \ + -d $(src)/UnicodeData.txt \ + -f $(src)/CaseFolding.txt \ + -n $(src)/NormalizationCorrections.txt \ + -t $(src)/NormalizationTest.txt \ -o $@ + +$(obj)/utf8data.h: $(filter %.txt, $(cmd_utf8data)) $(obj)/mkutf8data FORCE + $(call if_changed,utf8data) + +always += utf8data.h +no-clean-files += utf8data.h + +endif + +hostprogs-y += mkutf8data diff --git a/fs/unicode/README.utf8data b/fs/unicode/README.utf8data index eeb7561..155d56e 100644 --- a/fs/unicode/README.utf8data +++ b/fs/unicode/README.utf8data @@ -41,15 +41,15 @@ released version of the UCD can be found here: http://www.unicode.org/Public/UCD/latest/ -To build the utf8data.h file, from a kernel tree that has been built, -cd to this directory (fs/unicode) and run this command: +To regenerate utf8data.h in the build process, pass REGENERATE_UTF8DATA=1 +from the command line. The easiest command to update it is this: - make C=../.. objdir=../.. utf8data.h.new + make REGENERATE_UTF8DATA=1 fs/unicode/ -After sanity checking the newly generated utf8data.h.new file (the +After sanity checking the newly generated utf8data.h file (the version generated from the 12.1.0 UCD should be 4,109 lines long, and have a total size of 324k) and/or comparing it with the older version -of utf8data.h, rename it to utf8data.h. +of utf8data.h, check it in. If you are a kernel developer updating to a newer version of the Unicode Character Database, please update this README.utf8data file diff --git a/scripts/mkutf8data.c b/fs/unicode/mkutf8data.c similarity index 100% rename from scripts/mkutf8data.c rename to fs/unicode/mkutf8data.c diff --git a/scripts/Makefile b/scripts/Makefile index b87e3e0..9d442ee 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -20,7 +20,6 @@ hostprogs-$(CONFIG_ASN1) += asn1_compiler hostprogs-$(CONFIG_MODULE_SIG) += sign-file hostprogs-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert hostprogs-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert -hostprogs-$(CONFIG_UNICODE) += mkutf8data HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include -- 2.7.4