Dear Nick, I see, thank you so much. Best regards
2008-06-02 jian 发件人： Nick Clifton 发送时间： 2008-06-02 16:32:40 收件人： jian 抄送： bug-binutils 主题： Re: Ask for helping about LD linker Hi Jian, > But how to remove the unused functions in system library(maybe compile > the system library without --funciton-sections) when linking program. Short Answer: It cannot be done. Long Answer: If you are linking against a *shared* library then you will not be able to remove any functions in the shared library. (Nor would you want to - other programs may need those functions). If you are linking against a *static* system library (which has not been compiled with --ffunction-sections), then unused functions should not normally be copied into the executable. The exception is when an unused function is in the same object file inside the library as a used function (or used global symbol). Ie the linker only discards code at the object file level. If some part of an object file inside a static library is needed by the executable then the entire contents of that object file will be copies into the executable. Cheers Nick
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