depends perl &&
depends which &&

optional_depends openjade                 \
                 ""                       \
                 ""                       \
                 "to build documentation" &&

optional_depends linux-pam         \
                 "--with-pam=yes"  \
                 "--with-pam=no"   \
                 "for PAM support" &&

optional_depends libselinux           \
                 "--with-selinux=yes" \
                 "--with-selinux=no"  \
                 "for PAM support"    &&

optional_depends MAIL-TRANSPORT-AGENT \
                 ""                   \
                 "--without-sendmail" \
                 "for the e-mailing of reports"
