optional_depends Linux-PAM "--with-pam" "" "for PAM support"
optional_depends openssl   "--with-tls" "" "for SSL/TLS support"

optional_depends %MYSQL \
                 "--with-mysql" \
                 "--without-mysql" \
                 "for MySQL user auth"

optional_depends postgresql \
                 "--with-pgsql" \
                 "--without-pgsql" \
                 "for PostgreSQL user auth"

optional_depends openldap \
                 "--with-ldap" \
                 "--without-ldap" \
                 "for LDAP auth"
