c++filt - Demangle C++ and Java symbols.
[--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  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:
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. -p --no-params When demangling the name of a function, do not display the types of the functions 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:
c++filt can decode various methods of mangling, used by -->
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.
1. MS-DOS does not allow + characters in file names, so on MS-DOS this program is named c++filt.
the Info entries for binutils.
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