C++FILT(1) GNU Development Tools 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 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
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C++FILT(1) GNU Development Tools C++FILT(1)
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 CXXFILT.
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C++FILT(1) GNU Development Tools C++FILT(1)SEE ALSO
the Info entries for binutils.
COPYRIGHT
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 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''.
binutils-050707 2011-08-18 3
