if [[ "$MPOP_TLS" == "gnutls" ]]; then
  depends "gnutls" "--with-tls=gnutls"
elif [[ "$MPOP_TLS" == "openssl" ]]; then
  depends "SSL" "--with-tls=openssl"
fi                                                       &&

optional_depends gettext \
                 "--enable-nls" \
                 "--disable-nls" \
                 "for Native Language Support" &&

optional_depends libsecret \
                 "--with-libsecret" \
                 "--without-libsecret" \
                 "for GNOME password management support" &&

optional_depends "libidn"                                \
                 "--with-libidn"                         \
                 "--without-libidn"                      \
                 "For internationalized domain names."   &&
optional_depends "gsasl"                                 \
                 "--with-libgsasl"                       \
                 "--without-libgsasl"                    \
                 "For more authentication methods."

.