-A     Write the full pathname or library name of an object on each line.

-e     Write only external (global) and static symbol information.

-f     Produce full output. Write redundant symbols ( .text, .data, and .bss), normally suppressed.

-g     Write only external (global) symbol information.

-o     Write numeric values in octal (equivalent to -t o).

-P     Write information in a portable output format, as specified in the STDOUT section.

-t  format
       Write  each  numeric  value  in  the specified format. The format shall be dependent on the single
       character used as the format option-argument:

d
       The offset is written in decimal    (default).

o
       The offset is written in octal.

x
       The offset is written in hexadecimal.

-u     Write only undefined symbols.

-v     Sort output by value instead of alphabetically.

-x     Write numeric values in hexadecimal (equivalent to -t x).