depends ncurses '--with-screen=ncursesw' &&

optional_depends pcre \
                 "--with-pcre=${INSTALL_ROOT}/usr" \
                 "--without-pcre" \
                 "to use system PCRE library" &&

optional_depends GNUPG \
                 "--enable-pgp-gpg" \
                 "--disable-pgp-gpg" \
                 "for PGP/GPG support" &&

optional_depends ispell \
                 "--with-ispell" \
                 "--without-ispell" \
                 "for spell checking support" &&

optional_depends metamail \
                 "--with-metamail" \
                 "--without-metamail" \
                 "to use viewer program for MIME articles" &&

optional_depends gsasl \
                 "--enable-gsasl" \
                 "--disable-gsasl" \
                 "for GNU SASL support" &&

optional_depends GETTEXT \
                 "--enable-nls --without-included-gettext" \
                 "--disable-nls" \
                 "for Native Language Support" &&

optional_depends icu "" "" "for Unicode support" &&

if ! is_depends_enabled ${SPELL} icu; then
  optional_depends libidn "" "" "for IDN support"
fi &&

optional_depends uudeview "" "" "for decoding and collecting multipart binary articles"