depends  atk     &&
depends  cairo   &&
depends  glib2   &&
depends  gtk+2   &&
depends  libpng  &&
depends  pango   &&

optional_depends  "xfig"                          \
                  ""                              \
                  ""                              \
                  "XFig, is recommended for enhancing the output of chemtool, and for creation of 2D diagrams and schematics in general"