erc-coff-c++filt [ -_ | --strip-underscores ] [ -n | --no-strip-underscores ] [ -s format | --format=format ] [ --help ] [ --version ] [ symbol... ]
The C++ language provides function overloading, which means that you can write many functions with the same name (providing each takes parameters of different types). All C++ function names are encoded into a low-level assembly label (this process is known as mangling). The c++filt 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.
On some systems, both the C and C++ compilers put an underscore in front of every name. For example, the C name foo gets the low-level name _foo. This option removes the initial underscore. Whether c++filt removes the underscore by default is target dependent.
Do not remove the initial underscore.
nm can decode three different methods of mangling, used by different C++ compilers. The argument to this option selects which method it uses:
the one used by the compiler (the default method)
the one used by the Lucid compiler
the one specified by the C++ Annotated Reference Manual
Print a summary of the options to c++filt and exit.
Print the version number of c++filt and exit.