optional_depends openldap   \
         '--enable-nuauth'  \
         '--disable-nuauth' \
         'To build the authentication daemon' &&
optional_depends linux-pam     \
         '--enable-pam-nufw'   \
         '--disable-pam-nufw'  \
         'To enable PAM authentication'       &&
optional_depends postgresql    \
         '' \
         '' \
         'Enable logging to postgresql?'      &&
optional_depends MYSQL         \
         '' \
         '' \
         'Enable logging to mysql?'           &&
depends iptables                              &&
depends gnutls                                &&
depends cyrus-sasl                            &&
depends glib                                  &&
depends libgcrypt

.