depends -sub CXX gcc && depends zlib && depends libtommath "--with-system-tommath" && optional_depends bzip2 "--enable-bzip2" \ "--disable-bzip2" \ "for bzip2 support" && optional_depends gmp "--enable-dsig" \ "--disable-dsig" \ "for digital signature support" && optional_depends ncurses '--enable-clamdtop' \ '--disable-clamdtop' \ 'build clamdtop' && optional_depends llvm '' '' 'JIT support in engine' && optional_depends SYSTEM-LOGGER "" "" "to log activity" && optional_depends SSL '' '' 'SSL crypto support'