if [[ -n $NEON_XML ]]; then
  depends $NEON_XML "--with-${NEON_XML}"
fi &&

optional_depends zlib \
                 "--with-zlib" \
                 "--without-zlib" \
                 "for zlib support" &&

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

case $NEON_SSL in
  none) OPTS="--without-ssl $OPTS"
  ;;
  openssl) depends SSL "--with-ssl=openssl"
  ;;
  gnutls) depends gnutls "--with-ssl=gnutls"
  ;;
esac &&

optional_depends ca-certificates \
                 "--with-ca-bundle=$INSTALL_ROOT/etc/ssl/certs/ca-certificates.crt" \
                 "--without-ca-bundle" \
                 "to use specified filename of an SSL CA root bundle" &&

optional_depends krb5 \
                 "--with-gssapi" \
                 "--without-gssapi" \
                 "for GSSAPI support" &&

optional_depends libproxy \
                 "--with-libproxy" \
                 "--without-libproxy" \
                 "for libproxy support"

.