anchor.diff:      --with-system-glm \
       --with-system-mdds \
       --with-system-redland \
  +    --with-system-libabw \
       --with-system-libwps \
       --with-system-libwpg \
       --with-system-libwpd \
  +    --with-system-libcdr \
       --with-system-libcmis \
  +    --with-system-libebook \
       --with-system-libmwaw \
       --with-system-libetonyek \
       --with-system-libvisio \
  
positive.code:     --with-system-clucene \
      --with-system-vigra \
      --with-system-hunspell \
  "
  
  do_configure() {
  
negative.code:     clucene-core \
      vigra \
      hunspell \
      mythes \
  "
  
  # necessary to let the call for python-config succeed
  