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(binutils.info)c++filt

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

   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.

`-_'
`--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-new-abi'
          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.

     _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,

          c++filt SYMBOL

     may in a future release become

          c++filt OPTION SYMBOL

   ---------- Footnotes ----------

   (1) MS-DOS does not allow `+' characters in file names, so on MS-DOS
this program is named `cxxfilt'.