depends -sub CXX gcc  &&
depends  zlib  &&
depends  bzip2  &&
depends  curl  &&
depends  wget  &&
depends  pkgconfig  &&

optional_depends  gtk+2  '--with-gui'  '--without-gui'  'for GUI'  &&
optional_depends  db  '--with-libdb'  '--without-libdb'  'for jigdo-file cache'

.