Pan ruochen <panruochen@xxxxxxxxx> writes: > I found weak symbols wouldn't be overriden by the strong symbols with > same names. This case, involving shared libraries, actually has nothing to do with either gcc or the binutils. It's the dynamic linker that matters here, and that is part of the C library. You didn't say, but I'm guessing that you are using GNU/Linux and glibc. By default, the glibc dynamic linker uses the first definition it finds even if it is weak. That is because overriding a weak symbol is rare, and would require the dynamic linker to search all the remaining shared libraries. You can get the behaviour you want by defining the environment variable LD_DYNAMIC_WEAK. Ian
