我正在复制粘贴以下人的一部分ld
:-
-u symbol
--undefined=symbol
Force symbol to be entered in the output file as an undefined symbol. Doing this
may,for example, trigger linking of additional modules from standard libraries.
`-u' may be repeated with different option arguments to enter additional
undefined symbols.
如何实际使用此选项?就像我如何在我的源代码中触发附加模块的链接一样,这个选项什么时候真正有用?