FreeBSD ports awaiting for commit to ports tree:
sysutils/backuppc-devel - development version of sysutils/backuppc (4.0.0alpha2)
sysutils/p5-BackupPC-XS - XS Perl extension for BackupPC libraries (0.20)
net/rsync-bpc - Modified rsync that used as part of BackupPC (184.108.40.206)
Since it can take some time, impatients can use attached tar balls.
Also see notes about pool graphs patch:
This patch included in sysutils/backuppc-devel port.