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c++filt [ -_ | --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.
GNU `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 GNU 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.
*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,
may in a future release become
c++filt OPTION SYMBOL
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