Mysqltest Unknown system variable, failed: 1193

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Hi,=20

I'm beginner to try to fix a mysql bug by myself,=20
but i got a trouble that "mysqltest: set debug_sync=3D 'RESET'' failed: =
1193: Unknown system
variable 'debug_sync'"

I also read the URL
http://forge.mysql.com/wiki/MySQL_Internals_Test_Synchroniza tion#Test_Syn=
chronization
But it cannot work.

I've also tried the configure option - '--enable-debug-sync',
but it cannot work with message - ' configure: WARNING: unrecognized=20
options: --enable-debug-sync '.

I've also tried configure option - '--with-debug=3Dfull',
it can configure and no-warring message.
When i completed total install operation,
it still cannot support the system variable - DEBUG_SYNC.

I tried use the url -=20
'http://forge.mysql.com/wiki/MySQL_Internals_Test_Synchroniz ation#Debug_S=
ync_Implementation'
and tried other related webpage, but it still cannot work.

I not found the file - include/have_debug_sync.inc,
so i build it myself - reference older version.
It still cannot work.

I guess that mysql don't support the system variable - 'DEBUG_SYNC',
but i'm not sure that thinking is correct.



[MYSQL VERSION: 5.4, 6.0]
OS: Ubuntu: 9.04
Source file:=20
http://downloads.mysql.com/archives/mysql-6.0/mysql-6.0.0-al pha.tar.gz
http://downloads.mysql.com/archives/mysql-5.4/mysql-5.4.0-be ta.tar.gz


[Install Configure]
../configure --prefix=3D/usr/local/mysql --enable-debug-sync ( with =
warring message )
../configure --prefix=3D/usr/local/mysql --with-debug=3Dfull ( i use )

[Install Operation]
make
make install
cp support-files/my-medium.cnf /etc/my.cnf
cd /usr/local/mysql
chown -R mysql .
chgrp -R mysql .=20
bin/mysql_install_db --user=3Droot
chown -R root .
chown -R mysql var
bin/mysqld_safe --user=3Dmysql &

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Could someone know that?
Could you help me?
Thank you very much.



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