Linux / Unix Command: c++filt

Command Library

NAME

c++filt - Demangle C++ and Java symbols.  

SYNOPSIS

c++filt [-_|--strip-underscores]
        [-j|--java]
        [-n|--no-strip-underscores]
        [-s format|--format=format]
        [--help]  [--version]  [symbol...]  

DESCRIPTION

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:

        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.  

OPTIONS

-_

--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.

-j

--java

Prints demangled names using Java syntax. The default is to use C++ syntax.

-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

hp

the one used by the HP compiler

edg

the one used by the EDG compiler

gnu-v3

the one used by the GNU compiler with the new ABI.

--help

Print a summary of the options to c++filt and exit.

--version

Print the version number of c++filt and exit.

 

SEE ALSO

the Info entries for binutils.  

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Important: Use the man command (% man) to see how a command is used on your particular computer.

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