Usage:
   emerge [ options ] [ action ] [ ebuildfile | tbz2file | dependency ] [ ... ]
   emerge [ options ] [ action ] < system | world >
   emerge < --sync | --metadata | --info >
   emerge --resume [ --pretend | --ask | --skipfirst ]
   emerge --help [ system | world | config | --sync ]
Options: -[abBcCdDefgGhikKlnNoOpqPsStuvV] [--oneshot] [--newuse] [--noconfmem]
                                          [ --color < y | n >  ] [ --columns ]
                                                                 [--nospinner]
                                          [ --deep  ] [--with-bdeps < y | n > ]
Actions: [ --clean | --depclean | --prune | --regen | --search | --unmerge ]


   For more help try 'emerge --help' or consult the man page.