当创建共享文件时，ld链接器从静态库中删除一个对象文件。

I have a number of static libraries which I link together into one shared library. One of them, say libUsefulFunc.a contains an object file usefulFunc.o with a function, usefulFunc() that is only used from another static library, let's say usingFunc(), residing in usingFunc.c hosted in libUsingFunc.a I have a number of static libraries which I lin