UDF Regular Expressions for maria db

I've already asked here http://stackoverflow.com/questions/6659030/udf-regular-expreissions-for-maria-db

I've found this really good user defined functions ( http://www.mysqludf.org/lib_mysqludf_preg/index.php ) for using regular expressions in mysql However when trying to instal I get can't find mysql library

====== OUTPUT =====
checking for mysqlbin... dirname: missing operand
Try `dirname --help' for more information.
checking for mysql_config... no
no
configure: error: "Can't find mysql library"
====================

The site says

>>If mysql is an unusual place, you might need to add --with-mysql=<mysql directory>/bin/mysql_config

I can't find mysql_config, searching for mysql shows these directories

/var/log/mysql
/var/lib/mysql
/var/lib/mysql/mysql
/usr/share/mysql
/usr/lib/mysql
/etc/mysql/

I am using ubuntu lucid lynx, any sugestions would be greatly appreciated, thank