list symbols from object files

-C
--demangle[=style]
    Decode  (demangle)  low-level  symbol  names  into  user-level  names.   Besides removing any initial
    underscore prepended by the system, this makes C++ function names readable. Different compilers  have
    different  mangling  styles.  The  optional  demangling  style  argument  can  be  used  to choose an
    appropriate demangling style for your compiler.