c++filt

c++filt ? demangle C++ symbols

c++filt

[?_|??strip-underscores] [?s {gnu,lucid,arm} | ??format={gnu,lucid,arm}] [??help] [??version] [symbol...]

The C++ language provides function overloading, which means that you can write many functions with the same name (providing each takes parameters of different types). All C++ 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 by specifying these symbols on the command line.

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 leading underscore.

?s {gnu,lucid,arm}

??format={gnu,lucid,arm}

GNU nm can decode three different methods of mangling, used by different C++ compilers. This option selects which method it uses: the one used by the GNU compiler, the one used by the Lucid compiler, or the one specified by the C++ Annotated Reference Manual. The default is the GNU style.

??help

Print a summary of the options to c++filt and exit.

??version

Print the version number of c++filt and exit.

‘binutils’ entry in info; The GNU Binary Utilities, Roland H. Pesch (June 1993).

Copyright (c) 1993 Free Software Foundation, Inc.

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