c++filt(1)
NAME
c++filt - Demangle C++ and Java symbols.
SYNOPSIS
- c++filt [-_|--strip-underscores]
- [-j|--java] [-n|--no-strip-underscores] [-p|--no-params] [-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 lowlevel 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.
- -p
--no-params - When demangling the name of a function, do not display the types of the function's parameters.
- -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.
FOOTNOTES
- 1. MS-DOS does not allow "+" characters in file names, so on MS-DOS
- this program is named c++filt.
SEE ALSO
the Info entries for binutils.
COPYRIGHT
Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
2003 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 1.1 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''.