linux-kernel - Re: [PATCH] unicode: refactor the rule for regenerating utf8data.h

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Message-ID: <20190428174315.GC24089@mit.edu>
Date:   Sun, 28 Apr 2019 13:43:15 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Olaf Weber <olaf@....com>,
        Gabriel Krisman Bertazi <krisman@...labora.co.uk>,
        Gabriel Krisman Bertazi <krisman@...labora.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] unicode: refactor the rule for regenerating utf8data.h

Thanks, for the suggestion and the patch!  I agree it's much better
with your proposed change (and it gets mkutf8data out of your hair :-)

I did need to make one change to your patch in order for it to work
correctly with a build directory.  That is, to support

	make -O /build/ext4 REGENERATE_UTF8DATA=1 fs/unicode/

I'll apply it to the ext4 git tree with this change.

     	      	     	      	   - Ted

diff --git a/fs/unicode/Makefile b/fs/unicode/Makefile
index 1a109b7a1da9..45955264ac04 100644
--- a/fs/unicode/Makefile
+++ b/fs/unicode/Makefile
@@ -14,13 +14,13 @@ $(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 \
+		-a $(srctree)/$(src)/DerivedAge.txt \
+		-c $(srctree)/$(src)/DerivedCombiningClass.txt \
+		-p $(srctree)/$(src)/DerivedCoreProperties.txt \
+		-d $(srctree)/$(src)/UnicodeData.txt \
+		-f $(srctree)/$(src)/CaseFolding.txt \
+		-n $(srctree)/$(src)/NormalizationCorrections.txt \
+		-t $(srctree)/$(src)/NormalizationTest.txt \
 		-o $@
 
 $(obj)/utf8data.h: $(filter %.txt, $(cmd_utf8data)) $(obj)/mkutf8data FORCE