depends  g++       &&
depends  autoconf  &&
depends  automake  &&
depends  jpeg      &&
depends  tiff      &&
depends  libpng    &&
depends  zlib      &&

optional_depends  "X11-LIBS"  "--with-opengl=opengl"  "--disable-opengl"  "for gui support"       &&
optional_depends  "cups"      ""                      ""                  "for printing support"

