depends  bison  &&
depends  flex   &&
depends  perl   &&
depends  g++    &&

optional_depends  graphviz                \
                  ""                      \
                  ""                      \
                  "for graphical charts"  &&

optional_depends  texlive                                               \
                  ""                                                  \
                  ""                                                  \
                  "for generating LaTeX, Postscript, and PDF output"  &&

optional_depends  qt4                   \
                  "--with-doxywizard"   \
                  ""                    \
                  "for DoxyWizard GUI"  &&
optional_depends  POSTSCRIPT-INTERPRETER \
                  ""                                          \
                  ""                                          \
                  "for generating Postscript and PDF output"
