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.\" ========================================================================
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.\" ========================================================================
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.\"
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.\"
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.IX Title "C++FILT 1"
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.IX Title "C++FILT 1"
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.TH C++FILT 1 "2008-05-06" "binutils-2.18.50" "GNU Development Tools"
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.TH C++FILT 1 "2008-05-06" "binutils-2.18.50" "GNU Development Tools"
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.SH "NAME"
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.SH "NAME"
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cxxfilt \- Demangle C++ and Java symbols.
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cxxfilt \- Demangle C++ and Java symbols.
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.SH "SYNOPSIS"
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.IX Header "SYNOPSIS"
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c++filt [\fB\-_\fR|\fB\-\-strip\-underscores\fR]
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c++filt [\fB\-_\fR|\fB\-\-strip\-underscores\fR]
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[\fB\-n\fR|\fB\-\-no\-strip\-underscores\fR]
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[\fB\-n\fR|\fB\-\-no\-strip\-underscores\fR]
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[\fB\-p\fR|\fB\-\-no\-params\fR]
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[\fB\-p\fR|\fB\-\-no\-params\fR]
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[\fB\-t\fR|\fB\-\-types\fR]
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[\fB\-t\fR|\fB\-\-types\fR]
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[\fB\-i\fR|\fB\-\-no\-verbose\fR]
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[\fB\-i\fR|\fB\-\-no\-verbose\fR]
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[\fB\-s\fR \fIformat\fR|\fB\-\-format=\fR\fIformat\fR]
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[\fB\-s\fR \fIformat\fR|\fB\-\-format=\fR\fIformat\fR]
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[\fB\-\-help\fR] [\fB\-\-version\fR] [\fIsymbol\fR...]
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[\fB\-\-help\fR] [\fB\-\-version\fR] [\fIsymbol\fR...]
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.SH "DESCRIPTION"
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \*(C+ and Java languages provide function overloading, which means
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The \*(C+ and Java languages provide function overloading, which means
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that you can write many functions with the same name, providing that
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that you can write many functions with the same name, providing that
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each function takes parameters of different types. In order to be
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each function takes parameters of different types. In order to be
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able to distinguish these similarly named functions \*(C+ and Java
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able to distinguish these similarly named functions \*(C+ and Java
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encode them into a low-level assembler name which uniquely identifies
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encode them into a low-level assembler name which uniquely identifies
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each different version. This process is known as \fImangling\fR. The
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each different version. This process is known as \fImangling\fR. The
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\&\fBc++filt\fR
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\&\fBc++filt\fR
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[1]
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[1]
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program does the inverse mapping: it decodes (\fIdemangles\fR) low-level
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program does the inverse mapping: it decodes (\fIdemangles\fR) low-level
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names into user-level names so that they can be read.
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names into user-level names so that they can be read.
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.PP
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.PP
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Every alphanumeric word (consisting of letters, digits, underscores,
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Every alphanumeric word (consisting of letters, digits, underscores,
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dollars, or periods) seen in the input is a potential mangled name.
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dollars, or periods) seen in the input is a potential mangled name.
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If the name decodes into a \*(C+ name, the \*(C+ name replaces the
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If the name decodes into a \*(C+ name, the \*(C+ name replaces the
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low-level name in the output, otherwise the original word is output.
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low-level name in the output, otherwise the original word is output.
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In this way you can pass an entire assembler source file, containing
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In this way you can pass an entire assembler source file, containing
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mangled names, through \fBc++filt\fR and see the same source file
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mangled names, through \fBc++filt\fR and see the same source file
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containing demangled names.
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containing demangled names.
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.PP
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.PP
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You can also use \fBc++filt\fR to decipher individual symbols by
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You can also use \fBc++filt\fR to decipher individual symbols by
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passing them on the command line:
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passing them on the command line:
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.PP
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.PP
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.Vb 1
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.Vb 1
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\& c++filt <symbol>
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\& c++filt <symbol>
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.Ve
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.Ve
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.PP
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.PP
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If no \fIsymbol\fR arguments are given, \fBc++filt\fR reads symbol
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If no \fIsymbol\fR arguments are given, \fBc++filt\fR reads symbol
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names from the standard input instead. All the results are printed on
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names from the standard input instead. All the results are printed on
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the standard output. The difference between reading names from the
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the standard output. The difference between reading names from the
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command line versus reading names from the standard input is that
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command line versus reading names from the standard input is that
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command line arguments are expected to be just mangled names and no
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command line arguments are expected to be just mangled names and no
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checking is performed to separate them from surrounding text. Thus
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checking is performed to separate them from surrounding text. Thus
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for example:
|
for example:
|
.PP
|
.PP
|
.Vb 1
|
.Vb 1
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\& c++filt -n _Z1fv
|
\& c++filt -n _Z1fv
|
.Ve
|
.Ve
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.PP
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.PP
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will work and demangle the name to \*(L"f()\*(R" whereas:
|
will work and demangle the name to \*(L"f()\*(R" whereas:
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.PP
|
.PP
|
.Vb 1
|
.Vb 1
|
\& c++filt -n _Z1fv,
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\& c++filt -n _Z1fv,
|
.Ve
|
.Ve
|
.PP
|
.PP
|
will not work. (Note the extra comma at the end of the mangled
|
will not work. (Note the extra comma at the end of the mangled
|
name which makes it invalid). This command however will work:
|
name which makes it invalid). This command however will work:
|
.PP
|
.PP
|
.Vb 1
|
.Vb 1
|
\& echo _Z1fv, | c++filt -n
|
\& echo _Z1fv, | c++filt -n
|
.Ve
|
.Ve
|
.PP
|
.PP
|
and will display \*(L"f(),\*(R", i.e., the demangled name followed by a
|
and will display \*(L"f(),\*(R", i.e., the demangled name followed by a
|
trailing comma. This behaviour is because when the names are read
|
trailing comma. This behaviour is because when the names are read
|
from the standard input it is expected that they might be part of an
|
from the standard input it is expected that they might be part of an
|
assembler source file where there might be extra, extraneous
|
assembler source file where there might be extra, extraneous
|
characters trailing after a mangled name. For example:
|
characters trailing after a mangled name. For example:
|
.PP
|
.PP
|
.Vb 1
|
.Vb 1
|
\& .type _Z1fv, @function
|
\& .type _Z1fv, @function
|
.Ve
|
.Ve
|
.SH "OPTIONS"
|
.SH "OPTIONS"
|
.IX Header "OPTIONS"
|
.IX Header "OPTIONS"
|
.IP "\fB\-_\fR" 4
|
.IP "\fB\-_\fR" 4
|
.IX Item "-_"
|
.IX Item "-_"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-strip\-underscores\fR" 4
|
.IP "\fB\-\-strip\-underscores\fR" 4
|
.IX Item "--strip-underscores"
|
.IX Item "--strip-underscores"
|
.PD
|
.PD
|
On some systems, both the C and \*(C+ compilers put an underscore in front
|
On some systems, both the C and \*(C+ compilers put an underscore in front
|
of every name. For example, the C name \f(CW\*(C`foo\*(C'\fR gets the low-level
|
of every name. For example, the C name \f(CW\*(C`foo\*(C'\fR gets the low-level
|
name \f(CW\*(C`_foo\*(C'\fR. This option removes the initial underscore. Whether
|
name \f(CW\*(C`_foo\*(C'\fR. This option removes the initial underscore. Whether
|
\&\fBc++filt\fR removes the underscore by default is target dependent.
|
\&\fBc++filt\fR removes the underscore by default is target dependent.
|
.IP "\fB\-j\fR" 4
|
.IP "\fB\-j\fR" 4
|
.IX Item "-j"
|
.IX Item "-j"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-java\fR" 4
|
.IP "\fB\-\-java\fR" 4
|
.IX Item "--java"
|
.IX Item "--java"
|
.PD
|
.PD
|
Prints demangled names using Java syntax. The default is to use \*(C+
|
Prints demangled names using Java syntax. The default is to use \*(C+
|
syntax.
|
syntax.
|
.IP "\fB\-n\fR" 4
|
.IP "\fB\-n\fR" 4
|
.IX Item "-n"
|
.IX Item "-n"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-no\-strip\-underscores\fR" 4
|
.IP "\fB\-\-no\-strip\-underscores\fR" 4
|
.IX Item "--no-strip-underscores"
|
.IX Item "--no-strip-underscores"
|
.PD
|
.PD
|
Do not remove the initial underscore.
|
Do not remove the initial underscore.
|
.IP "\fB\-p\fR" 4
|
.IP "\fB\-p\fR" 4
|
.IX Item "-p"
|
.IX Item "-p"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-no\-params\fR" 4
|
.IP "\fB\-\-no\-params\fR" 4
|
.IX Item "--no-params"
|
.IX Item "--no-params"
|
.PD
|
.PD
|
When demangling the name of a function, do not display the types of
|
When demangling the name of a function, do not display the types of
|
the function's parameters.
|
the function's parameters.
|
.IP "\fB\-t\fR" 4
|
.IP "\fB\-t\fR" 4
|
.IX Item "-t"
|
.IX Item "-t"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-types\fR" 4
|
.IP "\fB\-\-types\fR" 4
|
.IX Item "--types"
|
.IX Item "--types"
|
.PD
|
.PD
|
Attempt to demangle types as well as function names. This is disabled
|
Attempt to demangle types as well as function names. This is disabled
|
by default since mangled types are normally only used internally in
|
by default since mangled types are normally only used internally in
|
the compiler, and they can be confused with non-mangled names. For example,
|
the compiler, and they can be confused with non-mangled names. For example,
|
a function called \*(L"a\*(R" treated as a mangled type name would be
|
a function called \*(L"a\*(R" treated as a mangled type name would be
|
demangled to \*(L"signed char\*(R".
|
demangled to \*(L"signed char\*(R".
|
.IP "\fB\-i\fR" 4
|
.IP "\fB\-i\fR" 4
|
.IX Item "-i"
|
.IX Item "-i"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-no\-verbose\fR" 4
|
.IP "\fB\-\-no\-verbose\fR" 4
|
.IX Item "--no-verbose"
|
.IX Item "--no-verbose"
|
.PD
|
.PD
|
Do not include implementation details (if any) in the demangled
|
Do not include implementation details (if any) in the demangled
|
output.
|
output.
|
.IP "\fB\-s\fR \fIformat\fR" 4
|
.IP "\fB\-s\fR \fIformat\fR" 4
|
.IX Item "-s format"
|
.IX Item "-s format"
|
.PD 0
|
.PD 0
|
.IP "\fB\-\-format=\fR\fIformat\fR" 4
|
.IP "\fB\-\-format=\fR\fIformat\fR" 4
|
.IX Item "--format=format"
|
.IX Item "--format=format"
|
.PD
|
.PD
|
\&\fBc++filt\fR can decode various methods of mangling, used by
|
\&\fBc++filt\fR can decode various methods of mangling, used by
|
different compilers. The argument to this option selects which
|
different compilers. The argument to this option selects which
|
method it uses:
|
method it uses:
|
.RS 4
|
.RS 4
|
.ie n .IP """auto""" 4
|
.ie n .IP """auto""" 4
|
.el .IP "\f(CWauto\fR" 4
|
.el .IP "\f(CWauto\fR" 4
|
.IX Item "auto"
|
.IX Item "auto"
|
Automatic selection based on executable (the default method)
|
Automatic selection based on executable (the default method)
|
.ie n .IP """gnu""" 4
|
.ie n .IP """gnu""" 4
|
.el .IP "\f(CWgnu\fR" 4
|
.el .IP "\f(CWgnu\fR" 4
|
.IX Item "gnu"
|
.IX Item "gnu"
|
the one used by the \s-1GNU\s0 \*(C+ compiler (g++)
|
the one used by the \s-1GNU\s0 \*(C+ compiler (g++)
|
.ie n .IP """lucid""" 4
|
.ie n .IP """lucid""" 4
|
.el .IP "\f(CWlucid\fR" 4
|
.el .IP "\f(CWlucid\fR" 4
|
.IX Item "lucid"
|
.IX Item "lucid"
|
the one used by the Lucid compiler (lcc)
|
the one used by the Lucid compiler (lcc)
|
.ie n .IP """arm""" 4
|
.ie n .IP """arm""" 4
|
.el .IP "\f(CWarm\fR" 4
|
.el .IP "\f(CWarm\fR" 4
|
.IX Item "arm"
|
.IX Item "arm"
|
the one specified by the \*(C+ Annotated Reference Manual
|
the one specified by the \*(C+ Annotated Reference Manual
|
.ie n .IP """hp""" 4
|
.ie n .IP """hp""" 4
|
.el .IP "\f(CWhp\fR" 4
|
.el .IP "\f(CWhp\fR" 4
|
.IX Item "hp"
|
.IX Item "hp"
|
the one used by the \s-1HP\s0 compiler (aCC)
|
the one used by the \s-1HP\s0 compiler (aCC)
|
.ie n .IP """edg""" 4
|
.ie n .IP """edg""" 4
|
.el .IP "\f(CWedg\fR" 4
|
.el .IP "\f(CWedg\fR" 4
|
.IX Item "edg"
|
.IX Item "edg"
|
the one used by the \s-1EDG\s0 compiler
|
the one used by the \s-1EDG\s0 compiler
|
.ie n .IP """gnu\-v3""" 4
|
.ie n .IP """gnu\-v3""" 4
|
.el .IP "\f(CWgnu\-v3\fR" 4
|
.el .IP "\f(CWgnu\-v3\fR" 4
|
.IX Item "gnu-v3"
|
.IX Item "gnu-v3"
|
the one used by the \s-1GNU\s0 \*(C+ compiler (g++) with the V3 \s-1ABI\s0.
|
the one used by the \s-1GNU\s0 \*(C+ compiler (g++) with the V3 \s-1ABI\s0.
|
.ie n .IP """java""" 4
|
.ie n .IP """java""" 4
|
.el .IP "\f(CWjava\fR" 4
|
.el .IP "\f(CWjava\fR" 4
|
.IX Item "java"
|
.IX Item "java"
|
the one used by the \s-1GNU\s0 Java compiler (gcj)
|
the one used by the \s-1GNU\s0 Java compiler (gcj)
|
.ie n .IP """gnat""" 4
|
.ie n .IP """gnat""" 4
|
.el .IP "\f(CWgnat\fR" 4
|
.el .IP "\f(CWgnat\fR" 4
|
.IX Item "gnat"
|
.IX Item "gnat"
|
the one used by the \s-1GNU\s0 Ada compiler (\s-1GNAT\s0).
|
the one used by the \s-1GNU\s0 Ada compiler (\s-1GNAT\s0).
|
.RE
|
.RE
|
.RS 4
|
.RS 4
|
.RE
|
.RE
|
.IP "\fB\-\-help\fR" 4
|
.IP "\fB\-\-help\fR" 4
|
.IX Item "--help"
|
.IX Item "--help"
|
Print a summary of the options to \fBc++filt\fR and exit.
|
Print a summary of the options to \fBc++filt\fR and exit.
|
.IP "\fB\-\-version\fR" 4
|
.IP "\fB\-\-version\fR" 4
|
.IX Item "--version"
|
.IX Item "--version"
|
Print the version number of \fBc++filt\fR and exit.
|
Print the version number of \fBc++filt\fR and exit.
|
.IP "\fB@\fR\fIfile\fR" 4
|
.IP "\fB@\fR\fIfile\fR" 4
|
.IX Item "@file"
|
.IX Item "@file"
|
Read command-line options from \fIfile\fR. The options read are
|
Read command-line options from \fIfile\fR. The options read are
|
inserted in place of the original @\fIfile\fR option. If \fIfile\fR
|
inserted in place of the original @\fIfile\fR option. If \fIfile\fR
|
does not exist, or cannot be read, then the option will be treated
|
does not exist, or cannot be read, then the option will be treated
|
literally, and not removed.
|
literally, and not removed.
|
.Sp
|
.Sp
|
Options in \fIfile\fR are separated by whitespace. A whitespace
|
Options in \fIfile\fR are separated by whitespace. A whitespace
|
character may be included in an option by surrounding the entire
|
character may be included in an option by surrounding the entire
|
option in either single or double quotes. Any character (including a
|
option in either single or double quotes. Any character (including a
|
backslash) may be included by prefixing the character to be included
|
backslash) may be included by prefixing the character to be included
|
with a backslash. The \fIfile\fR may itself contain additional
|
with a backslash. The \fIfile\fR may itself contain additional
|
@\fIfile\fR options; any such options will be processed recursively.
|
@\fIfile\fR options; any such options will be processed recursively.
|
.SH "FOOTNOTES"
|
.SH "FOOTNOTES"
|
.IX Header "FOOTNOTES"
|
.IX Header "FOOTNOTES"
|
.IP "1." 4
|
.IP "1." 4
|
MS-DOS does not allow \f(CW\*(C`+\*(C'\fR characters in file names, so on
|
MS-DOS does not allow \f(CW\*(C`+\*(C'\fR characters in file names, so on
|
MS-DOS this program is named \fB\s-1CXXFILT\s0\fR.
|
MS-DOS this program is named \fB\s-1CXXFILT\s0\fR.
|
.SH "SEE ALSO"
|
.SH "SEE ALSO"
|
.IX Header "SEE ALSO"
|
.IX Header "SEE ALSO"
|
the Info entries for \fIbinutils\fR.
|
the Info entries for \fIbinutils\fR.
|
.SH "COPYRIGHT"
|
.SH "COPYRIGHT"
|
.IX Header "COPYRIGHT"
|
.IX Header "COPYRIGHT"
|
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
|
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
|
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
|
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
|
.PP
|
.PP
|
Permission is granted to copy, distribute and/or modify this document
|
Permission is granted to copy, distribute and/or modify this document
|
under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.2
|
under the terms of the \s-1GNU\s0 Free Documentation License, Version 1.2
|
or any later version published by the Free Software Foundation;
|
or any later version published by the Free Software Foundation;
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
Back-Cover Texts. A copy of the license is included in the
|
Back-Cover Texts. A copy of the license is included in the
|
section entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R".
|
section entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R".
|
|
|
