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:
c++filt symbol
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.
-_
--strip-underscores
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.
-n
--no-strip-underscores
Do not remove the initial underscore.
-s format
--format=format
GNU nm can decode three different methods of mangling, used by
different C++ compilers. The argument to this option selects which
method it uses:
gnu
the one used by the GNU compiler (the default method)
lucid
the one used by the Lucid compiler
arm
the one specified by the C++ Annotated Reference Manual
--help
Print a summary of the options to c++filt and exit.
--version
Print the version number of c++filt and exit.
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,