深入理解 --deep 和 --with-bdeps 选项

[flyinflash]

`For a dependency aware version of --unmerge, use --depclean or --prune.`
`Also see --with-bdeps for behavior with respect to build time dependencies that are not strictly required.`


这两句实在无法理解……


请各位前辈多多指点，谢谢。