But at the same time it
seems that openssl enabled by default at least if the bacula
can find headers and libraries
# ./configure --prefix=/opt/bacula-7.4.0
--with-postgresql=/usr/pgsql-9.4/ --with-mysql --enable-acl
--with-tcp-wrappers --with-sqlite3
...
Large file support: yes
Bacula conio support: yes -ltinfo
readline support: no
TCP Wrappers support: yes -lwrap
TLS support: yes
Encryption support: yes
ZLIB support: yes
LZO support: yes
So I think you should
use option --with-openssl only if you have installed openssl
from source