optional_depends "xaw3d"                               \
                 ""                                    \
                 ""                                    \
                 "for fancy 3D-style scroll bars"      &&

optional_depends "imlib"                               \
                 ""                                    \
                 ""                                    \
                 "lets Emacs use its own color allocation functions" &&

optional_depends "libpng"                              \
                 ""                                    \
                 ""                                    \
                 "for PNG format support"              &&
                 
optional_depends "zlib"                                \
                 ""                                    \
                 ""                                    \
                 "for PNG format support"              &&
                 
optional_depends "jpeg"                                \
                 ""                                    \
                 ""                                    \
                 "for JPEG format support"             &&
                 
optional_depends "tiff"                                \
                 ""                                    \
                 ""                                    \
                 "for TIFF format support"             &&
                 
optional_depends "libungif"                            \
                 ""                                    \
                 ""                                    \
                 "for GIF format support"
