cxxfilt - Demangle C++ and Java symbols.
c++filt [-_|--strip-underscore]
 [-n|--no-strip-underscore]
 [-p|--no-params]
 [-t|--types]
 [-i|--no-verbose]
 [-s format|--format=format]
 [--help] [--version] [symbol...]
The C++ and Java languages provide function overloading, which means that you
  can write many functions with the same name, providing that each function
  takes parameters of different types. In order to be able to distinguish these
  similarly named functions C++ and Java encode them into a low-level assembler
  name which uniquely identifies each different version. 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
  they can be read.
Every alphanumeric word (consisting of letters, digits,
    underscores, dollars, or periods) seen in the input is a potential mangled
    name. If the name decodes into a C++ name, the C++ name replaces the
    low-level name in the output, otherwise the original word is output. In this
    way you can pass an entire assembler source file, containing mangled names,
    through c++filt and see the same source file containing demangled
    names.
You can also use c++filt to decipher individual symbols by
    passing them on the command line:
        c++filt <symbol>
If no symbol arguments are given, c++filt reads
    symbol names from the standard input instead. All the results are printed on
    the standard output. The difference between reading names from the command
    line versus reading names from the standard input is that command line
    arguments are expected to be just mangled names and no checking is performed
    to separate them from surrounding text. Thus for example:
        c++filt -n _Z1fv
will work and demangle the name to "f()" whereas:
        c++filt -n _Z1fv,
will not work. (Note the extra comma at the end of the mangled
    name which makes it invalid). This command however will work:
        echo _Z1fv, | c++filt -n
and will display "f(),", i.e., the demangled name
    followed by a trailing comma. This behaviour is because when the names are
    read from the standard input it is expected that they might be part of an
    assembler source file where there might be extra, extraneous characters
    trailing after a mangled name. For example:
            .type   _Z1fv, @function
  - -_
- --strip-underscore
- 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-underscore
- Do not remove the initial underscore.
- -p
- --no-params
- When demangling the name of a function, do not display the types of the
      function's parameters.
- -t
- --types
- Attempt to demangle types as well as function names. This is disabled by
      default since mangled types are normally only used internally in the
      compiler, and they can be confused with non-mangled names. For example, a
      function called "a" treated as a mangled type name would be
      demangled to "signed char".
- -i
- --no-verbose
- Do not include implementation details (if any) in the demangled
    output.
- -s format
- --format=format
- c++filt can decode various methods of mangling, used by different
      compilers. The argument to this option selects which method it uses:
  - "auto"
- Automatic selection based on executable (the default method)
- "gnu"
- the one used by the GNU C++ compiler (g++)
- "lucid"
- the one used by the Lucid compiler (lcc)
- "arm"
- the one specified by the C++ Annotated Reference Manual
- "hp"
- the one used by the HP compiler (aCC)
- "edg"
- the one used by the EDG compiler
- "gnu-v3"
- the one used by the GNU C++ compiler (g++) with the V3 ABI.
- "java"
- the one used by the GNU Java compiler (gcj)
- "gnat"
- the one used by the GNU Ada compiler (GNAT).
 
  - --help
- Print a summary of the options to c++filt and exit.
- --version
- Print the version number of c++filt and exit.
- @file
- Read command-line options from file. The options read are inserted
      in place of the original @file option. If file does not
      exist, or cannot be read, then the option will be treated literally, and
      not removed.
    Options in file are separated by whitespace. A
        whitespace character may be included in an option by surrounding the
        entire option in either single or double quotes. Any character
        (including a backslash) may be included by prefixing the character to be
        included with a backslash. The file may itself contain additional
        @file options; any such options will be processed
      recursively. 
  - 1.
- MS-DOS does not allow "+" characters in
      file names, so on MS-DOS this program is named CXXFILT.
the Info entries for binutils.
Copyright (c) 1991-2018 Free Software Foundation, Inc.Permission is granted to copy, distribute and/or modify this
    document under the terms of the GNU Free Documentation License, Version 1.3
    or any later version published by the Free Software Foundation; with no
    Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts.
    A copy of the license is included in the section entitled "GNU Free
    Documentation License".