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
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.
foogets the low-level name
_foo. This option removes the initial underscore. Whether
c++filtremoves the underscore by default is target dependent.
nmcan decode three different methods of mangling, used by different C++ compilers. The argument to this option selects which method it uses:
c++filtis 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
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