完整输出为

Trying libraries: crypt m resolv rt
 Library crypt is not needed, excluding it
 Library m is needed, can't exclude it (yet)
 Library resolv is needed, can't exclude it (yet)
 Library rt is not needed, excluding it
 Library m is needed, can't exclude it (yet)
 Library resolv is needed, can't exclude it (yet)
Final link with: m resolv

意思是需要这些库，其中包含了crypt,rt库
但无法包含m,resolv的库，所以链接了这两个文件，之后在/lib下把库拷贝进去就行了