c++filt [-_|--strip-underscores] [-j|--java] [-n|--no-strip-underscores] [-p|--no-params] [-s format|--format=format] [--help] [--version] [symbol...]
The C++ and Java languages provides function overloading, which means that you can write many functions with the same name (providing each takes parameters of different types). All C++ and Java function names are encoded into a low-level assembly label (this process is known as mangling). The c++filt 1 program does the inverse mapping: it decodes (demangles) low-level names into user-level names so that the linker can keep these overloaded functions from clashing.
Every alphanumeric word (consisting of letters, digits, underscores, dollars, or periods) seen in the input is a potential label. If the label decodes into a C++ name, the C++ name replaces the low-level name in the output.
You can use c++filt to decipher individual symbols:
If no symbol arguments are given, c++filt reads symbol names from the standard input and writes the demangled names to the standard output. All results are printed on the standard output.
foogets the low-level name
_foo. This option removes the initial underscore. Whether c++filt removes the underscore by default is target dependent.
Warning: c++filt is a new utility, and the details of its user interface are subject to change in future releases. In particular, a command-line option may be required in the the future to decode a name passed as an argument on the command line; in other words,c++filt symbol
may in a future release becomec++filt option symbol
 MS-DOS does not allow + characters in file names, so on MS-DOS this program is named CXXFILT.