FreeBSD91 9.1-RELEASE-p13 and Percona XtraDB 5.6.16-64.1

hi can anyone tell me why? What is the problem…???
FreeBSD FreeBSD91 9.1-RELEASE-p13 FreeBSD 9.1-RELEASE-p13 #0
2014-05-30 08:50:57 2044 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.16-64.1 started; log sequence number 1626067
2014-05-30 08:50:57 2044 [ERROR] /usr/local/libexec/mysqld: unknown variable ‘wsrep_provider=/usr/local/lib/libgalera_smm.so’
2014-05-30 08:50:57 2044 [ERROR] Aborting
My my.cnf is standard:

[mysql]
port = 3306
socket = /var/db/mysql/mysql.sock
[mysqld]
user = mysql
default-storage-engine = InnoDB
socket = /var/db/mysql/mysql.sock
pid-file = /var/db/mysql/mysql.pid
datadir = /var/db/mysql/mysql/
log-bin = /var/db/mysql/mysql-bin
expire-logs-days = 14
sync-binlog = 1
log-error = /var/db/mysql/mysql-error.log
log-queries-not-using-indexes = 1
slow-query-log = 1
slow-query-log-file = /var/db/mysql/mysql-slow.log
wsrep_provider=/usr/local/lib/libgalera_smm.so
wsrep_cluster_name=xdb
wsrep_cluster_address=gcomm://
wsrep_slave_threads=4
wsrep_sst_method=mysqldump # default is mysqldump, mysqldump/rsync/xtrabackup
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
ls -al /usr/local/lib/libgalera_smm.so
-r–r–r– 1 root wheel 23672582 May 30 08:26 /usr/local/lib/libgalera_smm.so
Thx in advance
jonny

Looks like you are not using Percona XtraDB Cluster binaries, but normal Percona Server ones.
Here you can find sources for PXC package:
http://www.percona.com/downloads/Percona-XtraDB-Cluster-56/LATEST/
Let us know if building for FreeBSD works for you.