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c++filt [`-_'|`--strip-underscores'] [`-j'|`--java'] [`-n'|`--no-strip-underscores'] [`-s' format|`--format='format] [`--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
(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.
-_
--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.
-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.
Warning:
c++filt
is a new utility, and the details of its user interface are subject to change in future releases. In particular, a command-line option may be required in the the future to decode a name passed as an argument on the command line; in other words,
c++filt symbolmay in a future release become
c++filt option symbol
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