@ifinfo
@format
START-INFO-DIR-ENTRY
-* Binutils: (binutils). The GNU binary utilities "ar", "ld", "copy",
+* Binutils:: The GNU binary utilities "ar", "ld", "objcopy",
"objdump", "nm", "size", "strip", and "ranlib".
END-INFO-DIR-ENTRY
@end format
@end ifinfo
@ifinfo
-Copyright @copyright{} 1991 Free Software Foundation, Inc.
+Copyright @copyright{} 1991, 1992, 1993 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
@synindex ky cp
@c
-@c This file documents the GNU binary utilities "ar", "ld", "copy", "objdump",
-@c "nm", "size", "strip", and "ranlib".
+@c This file documents the GNU binary utilities "ar", "ld", "objcopy",
+@c "objdump", "nm", "size", "strip", and "ranlib".
@c
-@c Copyright (C) 1991 Free Software Foundation, Inc.
+@c Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
@c
@c This text may be freely distributed under the terms of the GNU
@c General Public License.
@titlepage
@finalout
@title The GNU Binary Utilities
-@subtitle Version 1.97
+@subtitle Version 2.2
@sp 1
-@subtitle October 1991
+@subtitle May 1993
@author Roland H. Pesch
@author Cygnus Support
@page
@end tex
@vskip 0pt plus 1filll
-Copyright @copyright{} 1991 Free Software Foundation, Inc.
+Copyright @copyright{} 1991, 1992, 1993 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
@cindex version
This brief manual contains preliminary documentation for the GNU binary
-utilities (collectively version 1.97):
+utilities (collectively version 2.2):
@iftex
@table @code
@item ar
Create, modify, and extract from archives
-@item copy
+@item objcopy
Copy and translate object files
@item nm
@menu
* ar:: Create, modify, and extract from archives
-* copy:: Copy and translate object files
+* objcopy:: Copy and translate object files
* ld:(ld)Overview. Combine object and archive files
* nm:: List symbols from object files
* objdump:: Display information from object files
* ranlib:: Generate index to archive contents
* size:: List section sizes and total size
* strip:: Discard symbols
+* c++filt:: Filter to demangle encoded C++ symbols
* Index::
@end menu
-@node ar, copy, Top, Top
+@node ar, objcopy, Top, Top
@chapter ar
@kindex ar
@cindex archives
@cindex collections of files
@smallexample
- ar [-]@var{p}@var{mod} [ @var{membername} ] @var{archive} @var{files}@dots{}
- ar -M [ <mri-script ]
+ar [-]@var{p}@var{mod} [ @var{membername} ] @var{archive} @var{file}@dots{}
+ar -M [ <mri-script ]
@end smallexample
The GNU @code{ar} program creates, modifies, and extracts from
the original individual files (called @dfn{members} of the archive).
The original files' contents, mode (permissions), timestamp, owner, and
-group are preserved in the archive, and may be reconstituted on
+group are preserved in the archive, and can be restored on
extraction.
@cindex name length
GNU @code{ar} can maintain archives whose members have names of any
length; however, depending on how @code{ar} is configured on your
-system, a limit on member-name length may be imposed (for compatibility
-with archive formats maintained with other tools). If it exists, the
+system, a limit on member-name length may be imposed for compatibility
+with archive formats maintained with other tools. If it exists, the
limit is often 15 characters (typical of formats related to a.out) or 16
characters (typical of formats related to coff).
@section Controlling @code{ar} on the command line
@smallexample
- ar [-]@var{p}@var{mod} [ @var{membername} ] @var{archive} @var{files}@dots{}
+ar [-]@var{p}@var{mod} [ @var{membername} ] @var{archive} @var{file}@dots{}
@end smallexample
@cindex Unix compatibility, @code{ar}
(optionally accompanied by other keyletters specifying
@emph{modifiers}), and the archive name to act on.
-Most operations can also accept further @var{files} arguments,
+Most operations can also accept further @var{file} arguments,
specifying particular files to operate on.
GNU @code{ar} allows you to mix the operation code @var{p} and modifier
@item d
@cindex deleting from archive
@emph{Delete} modules from the archive. Specify the names of modules to
-be deleted as @var{files}; the archive is untouched if you
+be deleted as @var{file}@dots{}; the archive is untouched if you
specify no files to delete.
If you specify the @samp{v} modifier, @code{ar} lists each module
than one member.
If no modifiers are used with @code{m}, any members you name in the
-@var{files} arguments are moved to the @emph{end} of the archive;
+@var{file} arguments are moved to the @emph{end} of the archive;
you can use the @samp{a}, @samp{b}, or @samp{i} modifiers to move them to a
specified place instead.
output file. If the @samp{v} modifier is specified, show the member
name before copying its contents to standard output.
-If you specify no @var{files}, all the files in the archive are printed.
+If you specify no @var{file} arguments, all the files in the archive are
+printed.
@item q
@cindex quick append to archive
-@emph{Quick append}; add @var{files} to the end of @var{archive},
-without checking for replacement.
+@emph{Quick append}; add the files @var{file}@dots{} to the end of
+@var{archive}, without checking for replacement.
The modifiers @samp{a}, @samp{b}, and @samp{i} do @emph{not} affect this
operation; new members are always placed at the end of the archive.
@item r
@cindex replacement in archive
-Insert @var{files} into @var{archive} (with @emph{replacement}). This
-operation differs from @samp{q} in that any previously existing members
-are deleted if their names match those being added.
+Insert the files @var{file}@dots{} into @var{archive} (with
+@emph{replacement}). This operation differs from @samp{q} in that any
+previously existing members are deleted if their names match those being
+added.
-If one of the files named in @var{files} doesn't exist, @code{ar}
+If one of the files named in @var{file}@dots{} doesn't exist, @code{ar}
displays an error message, and leaves undisturbed any existing members
of the archive matching that name.
@item t
@cindex contents of archive
Display a @emph{table} listing the contents of @var{archive}, or those
-of the files listed in @var{files} that are present in the
+of the files listed in @var{file}@dots{} that are present in the
archive. Normally only the member name is shown; if you also want to
see the modes (permissions), timestamp, owner, group, and size, you can
request that by also specifying the @samp{v} modifier.
-If you do not specify any @var{files}, all files in the archive
+If you do not specify a @var{file}, all files in the archive
are listed.
@cindex repeated names in archive
@item x
@cindex extract from archive
-@emph{Extract} members (named @var{files}) from the archive. You can
+@emph{Extract} members (named @var{file}) from the archive. You can
use the @samp{v} modifier with this operation, to request that
@code{ar} list each name as it extracts it.
-If you do not specify any @var{files}, all files in the archive
+If you do not specify a @var{file}, all files in the archive
are extracted.
@end table
@item a
@cindex relative placement in archive
Add new files @emph{after} an existing member of the
-archive. If you use the modifier @code{a}, the name of an existing archive
+archive. If you use the modifier @samp{a}, the name of an existing archive
member must be present as the @var{membername} argument, before the
@var{archive} specification.
@item b
Add new files @emph{before} an existing member of the
-archive. If you use the modifier @code{b}, the name of an existing archive
+archive. If you use the modifier @samp{b}, the name of an existing archive
member must be present as the @var{membername} argument, before the
@var{archive} specification. (same as @samp{i}).
@item i
Insert new files @emph{before} an existing member of the
-archive. If you use the modifier @code{i}, the name of an existing archive
+archive. If you use the modifier @samp{i}, the name of an existing archive
member must be present as the @var{membername} argument, before the
@var{archive} specification. (same as @samp{b}).
@item u
@cindex updating an archive
-Normally, @code{ar r}@dots{} inserts all files
+Normally, @samp{ar r}@dots{} inserts all files
listed into the archive. If you would like to insert @emph{only} those
of the files you list that are newer than existing members of the same
names, use this modifier. The @samp{u} modifier is allowed only for the
This modifier requests the @emph{verbose} version of an operation. Many
operations display additional information, such as filenames processed,
when the modifier @samp{v} is appended.
+
+@item V
+This modifier shows the version number of @code{ar}.
@end table
@node ar-scripts, , ar-cmdline, ar
@item VERBOSE
Toggle an internal flag governing the output from @code{DIRECTORY}.
When the flag is on, @code{DIRECTORY} output matches output from
-@samp{ar -tv @dots{}}.
+@samp{ar -tv }@dots{}.
@item SAVE
Commit your changes to the current archive, and actually save it as a
@end table
-@node copy, nm, ar, Top
-@chapter copy
+@node objcopy, nm, ar, Top
+@chapter objcopy
@smallexample
-copy [ -F @var{format} | --format=@var{format} ]
- [ -I @var{format} | --input-format=@var{format} ]
- [ -O @var{format} | --output-format=@var{format} ]
- [ -S | --strip-all ] [ -g | --strip-debug ]
- [ -x | --discard-all ] [ -X | --discard-locals ]
- [ -v | --verbose ] [ -V | --version ]
- @var{infile} [@var{outfile}]
+objcopy [ -F @var{format} | --format=@var{format} ]
+ [ -I @var{format} | --input-format=@var{format} ]
+ [ -O @var{format} | --output-format=@var{format} ]
+ [ -S | --strip-all ] [ -g | --strip-debug ]
+ [ -x | --discard-all ] [ -X | --discard-locals ]
+ [ -v | --verbose ] [ -V | --version ]
+ @var{infile} [@var{outfile}]
@end smallexample
-The GNU @code{copy} utility copies the contents of an object file to
-another. @code{copy} uses the GNU BFD Library to read and write the
+The GNU @code{objcopy} utility copies the contents of an object file to
+another. @code{objcopy} uses the GNU BFD Library to read and write the
object files. It can write the destination object file in a format
different from that of the source object file. The exact behavior of
-@code{copy} is controlled by command-line options.
+@code{objcopy} is controlled by command-line options.
-@code{copy} creates temporary files to do its translations and
-deletes them afterward. @code{copy} uses BFD to do all its
+@code{objcopy} creates temporary files to do its translations and
+deletes them afterward. @code{objcopy} uses BFD to do all its
translation work; it knows about all the formats BFD knows about, and
thus is able to recognize most formats without being told explicitly.
@xref{BFD,,BFD,ld.info,Using LD, the GNU linker}.
@item @var{infile}
@itemx @var{outfile}
The source and output files respectively.
-If you do not specify @var{outfile}, @code{copy} creates a
+If you do not specify @var{outfile}, @code{objcopy} creates a
temporary file and destructively renames the result with
the name of the input file.
@item -I @var{format}
@itemx --input-format=@var{format}
-Treat the source file's object format as specified, rather than
+Consider the source file's object format to be @var{format}, rather than
attempting to deduce it.
@item -O @var{format}
@itemx --output-format=@var{format}
-Write the output file using the specified object format.
+Write the output file using the object format @var{format}.
@item -F @var{format}
@itemx --format=@var{format}
@item -V
@itemx --version
-Show version number.
+Show the version number of @code{objcopy}.
@item -v
@itemx --verbose
Verbose output: list all object files modified. In the case of
-archives, @samp{copy -V} lists all members of the archive.
+archives, @samp{objcopy -V} lists all members of the archive.
@end table
@iftex
@xref{Top,, Overview,, Using LD: the GNU linker}.
@end iftex
-@node nm, objdump, copy, Top
+@node nm, objdump, objcopy, Top
@chapter nm
@cindex symbols
@kindex nm
@smallexample
- nm [ -a | --debug-syms ] [ -g | --extern-only ]
- [ -s | --print-armap ] [ -o | --print-file-name ]
- [ -n | --numeric-sort ] [ -p | --no-sort ]
- [ -r | --reverse-sort ] [ -u | --undefined-only ]
- [ --target @var{bfdname} ]
- [ @var{objfiles}@dots{} ]
+nm [ -a | --debug-syms ] [ -g | --extern-only ]
+ [ -s | --print-armap ] [ -A | -o | --print-file-name ]
+ [ -n | -v | --numeric-sort ] [ -p | --no-sort ]
+ [ -r | --reverse-sort ] [ -u | --undefined-only ]
+ [ -t @var{radix} | --radix=@var{radix} ] [ -P | --portability ]
+ [ --target=@var{bfdname} ] [ -f @var{format} | --format=@var{format} ]
+ [ -V | --version ] [ @var{objfile}@dots{} ]
@end smallexample
-GNU @code{nm} lists the symbols from object files @var{objfiles}.
+GNU @code{nm} lists the symbols from object files @var{objfile}@dots{}.
+If no object files are listed as arguments, @code{nm} assumes
+@file{a.out}.
+
+For each symbol, @code{nm} shows:
+
+@itemize @bullet
+@item
+The symbol value, in the radix selected by options (see below), or
+hexadecimal by default.
+
+@item
+The symbol type. At least the following types are used; others are, as
+well, depending on the object file format. If lowercase, the symbol is
+local; if uppercase, the symbol is global (external).
+
+@c Some more detail on exactly what these symbol types are used for
+@c would be nice.
+@table @code
+@item A
+Absolute.
+
+@item B
+BSS (uninitialized data).
+
+@item C
+Common.
+
+@item D
+Initialized data.
+
+@item I
+Indirect reference.
+
+@item T
+Text (program code).
+
+@item U
+Undefined.
+@end table
+
+@item
+The symbol name.
+@end itemize
The long and short forms of options, shown here as alternatives, are
equivalent.
@table @code
-@item @var{objfiles}@dots{}
-@kindex a.out
-Object files whose symbols are to be listed. If no object files are
-listed as arguments, @code{nm} assumes @samp{a.out}.
+@item -A
+@itemx -o
+@itemx --print-file-name
+@cindex input file name
+@cindex file name
+@cindex source file name
+Precede each symbol by the name of the input file (or archive element)
+in which it was found, rather than identifying the input file once only,
+before all of its symbols.
@item -a
@itemx --debug-syms
@cindex debugging symbols
-Display debugger-only symbols; normally these are not listed.
+Display all symbols, even debugger-only symbols; normally these are not
+listed.
+
+@item -f @var{format}
+@itemx --format=@var{format}
+Use the output format @var{format}, which can be @code{bsd},
+@code{sysv}, or @code{posix}. The default is @code{bsd}.
+Only the first character of @var{format} is significant, it can be
+either upper or lower case.
@item -g
@itemx --extern-only
@item -p
@itemx --no-sort
@cindex sorting symbols
-Don't bother to sort the symbols in any order; just print them in the
-order encountered.
+Don't bother to sort the symbols in any order; print them in the order
+encountered.
+
+@item -P
+@itemx --portability
+Use the POSIX.2 standard output format instead of the default format.
+Equivalent to @samp{-f posix}.
@item -n
+@itemx -v
@itemx --numeric-sort
-Sort symbols numerically by their addresses, not alphabetically by their
-names.
+Sort symbols numerically by their addresses, rather than alphabetically
+by their names.
@item -s
@itemx --print-armap
@cindex symbol index, listing
When listing symbols from archive members, include the index: a mapping
-(stored in the archive by @code{ar} or @code{ranlib}) of what modules
-contain definitions for what names.
-
-@item -o
-@itemx --print-file-name
-@cindex input file name
-@cindex file name
-@cindex source file name
-Precede each symbol by the name of the input file where it was found,
-rather than identifying the input file once only before all of its
-symbols.
+(stored in the archive by @code{ar} or @code{ranlib}) of which modules
+contain definitions for which names.
@item -r
@itemx --reverse-sort
-Reverse the sense of the sort (whether numeric or alphabetic); let the
+Reverse the order of the sort (whether numeric or alphabetic); let the
last come first.
-@item --target @var{bfdname}
-@c @item --target
+@item -t @var{radix}
+@itemx --radix=@var{radix}
+Use @var{radix} as the radix for printing the symbol values. It must be
+@samp{d} for decimal, @samp{o} for octal, or @samp{x} for hexadecimal.
+
+@item --target=@var{bfdname}
@cindex object code format
Specify an object code format other than your system's default format.
@xref{objdump}, for information on listing available formats.
-@c FIXME what *does* --target/no arg do?
@item -u
@itemx --undefined-only
@cindex undefined symbols
Display only undefined symbols (those external to each object file).
+@item -V
+@itemx --version
+Show the version number of @code{nm}.
@end table
@node objdump, ranlib, nm, Top
@kindex objdump
@smallexample
- objdump [ -a ] [ -b @var{bfdname} ] [ -d ] [ -f ]
- [ -h | --header ] [ -i ] [ -j @var{section} ] [ -l ]
- [ -m @var{machine} ] [ -r | --reloc ] [ -s ]
- [ --stabs ] [ -t | --syms ] [ -x ]
- @var{objfiles}@dots{}
+objdump [ -a ] [ -b @var{bfdname} ] [ -d ] [ -f ]
+ [ -h | --header ] [ -i ] [ -j @var{section} ] [ -l ]
+ [ -m @var{machine} ] [ -r | --reloc ] [ -s ]
+ [ --stabs ] [ -t | --syms ] [ -x ]
+ @var{objfile}@dots{}
@end smallexample
@code{objdump} displays information about one or more object files.
equivalent.
@table @code
-@item @var{objfiles}@dots{}
+@item @var{objfile}@dots{}
The object files to be examined. When you specify archives,
@code{objdump} shows information on each of the member object files.
@item -a
@c print_arelt_descr
@cindex archive headers
-If any files from @var{objfiles} are archives, display the archive
+If any of the @var{objfile} files are archives, display the archive
header information (in a format similar to @samp{ls -l}). Besides the
information you could list with @samp{ar tv}, @samp{objdump -a} shows
the object file format of each archive member.
@c suggest longname --target or --format or --bfd
@item -b @var{bfdname}
@cindex object code format
-You can specify a particular object-code format for your object files as
-@var{bfdname}. This may not be necessary; @var{objdump} can
-automatically recognize many formats. For example,
+Specify that the object-code format for the object files is
+@var{bfdname}. This option may not be necessary; @var{objdump} can
+automatically recognize many formats.
+
+For example,
@example
objdump -b oasys -m vax -h fu.o
@end example
@noindent
-Displays summary information from the section headers (@samp{-h}) of
-@file{fu.o}, which is explicitly identified (@samp{-m}) as a Vax object
+displays summary information from the section headers (@samp{-h}) of
+@file{fu.o}, which is explicitly identified (@samp{-m}) as a VAX object
file in the format produced by Oasys compilers. You can list the
formats available with the @samp{-i} option.
@cindex disassembling object code
@cindex machine instructions
Disassemble. Display the assembler mnemonics for the machine
-instructions from @var{objfiles}.
+instructions from @var{objfile}.
@item -f
@cindex object file header
File header. Display summary information from the overall header of
-each file in @var{objfiles}.
+each of the @var{objfile} files.
@item -h
@itemx --header
@cindex architectures available
@cindex object formats available
Display a list showing all architectures and object formats available
-for specification with @code{-b} or @code{-m}.
+for specification with @samp{-b} or @samp{-m}.
@c suggest longname --section
@item -j @var{name}
@cindex section information
-Display information only for section @var{name}
+Display information only for section @var{name}.
@c suggest longname --label or --linespec
@item -l
@c suggest longname --architecture
@item -m @var{machine}
@cindex architecture
-Specify the object files @var{objfiles} are for architecture
+Specify that the object files @var{objfile} are for architecture
@var{machine}. You can list available architectures using the @samp{-i}
option.
@cindex symbol index
@smallexample
- ranlib @var{archive}
+ranlib [-vV] @var{archive}
@end smallexample
-@code{ranlib} generates an index to the contents of an archive, and
+@code{ranlib} generates an index to the contents of an archive and
stores it in the archive. The index lists each symbol defined by a
member of an archive that is a relocatable object file.
You may use @samp{nm -s} or @samp{nm --print-armap} to list this index.
-An archive with such an index speeds up linking to the library, and
+An archive with such an index speeds up linking to the library and
allows routines in the library to call each other without regard to
their placement in the archive.
@code{ranlib} is completely equivalent to executing @samp{ar -s}.
@xref{ar}.
+@table @code
+@item -v
+@itemx -V
+Show the version number of @code{ranlib}.
+@end table
+
@node size, strip, ranlib, Top
@chapter size
@cindex section sizes
@smallexample
- size [ -A | -B | --format @var{compatibility} ]
- [ --help ] [ -d | -o | -x | --radix @var{number} ]
- [ --target @var{bfdname} ] [ -V | --version ]
- @var{objfiles}@dots{}
+size [ -A | -B | --format=@var{compatibility} ]
+ [ --help ] [ -d | -o | -x | --radix=@var{number} ]
+ [ --target=@var{bfdname} ] [ -V | --version ]
+ @var{objfile}@dots{}
@end smallexample
The GNU @code{size} utility lists the section sizes---and the total
-size---for each of the object files @var{objfiles} in its argument list.
-By default, one line of output is generated for each object file or each
-module in an archive.
+size---for each of the object or archive files @var{objfile} in its
+argument list. By default, one line of output is generated for each
+object file or each module in an archive.
The command line options have the following meanings:
@table @code
-@item @var{objfiles}@dots{}
+@item @var{objfile}@dots{}
The object files to be examined.
@item -A
@itemx -B
-@itemx --format @var{compatibility}
+@itemx --format=@var{compatibility}
@cindex size display format
Using one of these options, you can choose whether the output from GNU
@code{size} resembles output from System V @code{size} (using @samp{-A},
-or @samp{--format sysv}), or Berkeley @code{size} (using @samp{-B}, or
-@samp{--format berkeley}). The default is the one-line format similar to
+or @samp{--format=sysv}), or Berkeley @code{size} (using @samp{-B}, or
+@samp{--format=berkeley}). The default is the one-line format similar to
Berkeley's.
@c Bonus for doc-source readers: you can also say --format=strange (or
@c anything else that starts with 's') for sysv, and --format=boring (or
Here is an example of the Berkeley (default) format of output from
@code{size}:
@smallexample
- eg$ size --format Berkeley ranlib size
+size --format Berkeley ranlib size
text data bss dec hex filename
294880 81920 11592 388392 5ed28 ranlib
294880 81920 11888 388688 5ee50 size
This is the same data, but displayed closer to System V conventions:
@smallexample
- eg$ size --format SysV ranlib size
+size --format SysV ranlib size
ranlib :
section size addr
.text 294880 8192
@item -d
@itemx -o
@itemx -x
-@itemx --radix @var{number}
+@itemx --radix=@var{number}
@cindex size number format
@cindex radix for section sizes
Using one of these options, you can control whether the size of each
-section is given in decimal (@samp{-d}, or @samp{--radix 10}); octal
-(@samp{-o}, or @samp{--radix 8}); or hexadecimal (@samp{-x}, or
-@samp{--radix 16}). In @samp{--radix @var{number}}, only the three
+section is given in decimal (@samp{-d}, or @samp{--radix=10}); octal
+(@samp{-o}, or @samp{--radix=8}); or hexadecimal (@samp{-x}, or
+@samp{--radix=16}). In @samp{--radix=@var{number}}, only the three
values (8, 10, 16) are supported. The total size is always given in two
radices; decimal and hexadecimal for @samp{-d} or @samp{-x} output, or
octal and hexadecimal if you're using @samp{-o}.
-@item --target @var{bfdname}
+@item --target=@var{bfdname}
@cindex object code format
-You can specify a particular object-code format for @var{objfiles} as
-@var{bfdname}. This may not be necessary; @var{size} can
+Specify that the object-code format for @var{objfile} is
+@var{bfdname}. This option may not be necessary; @code{size} can
automatically recognize many formats. @xref{objdump}, for information
on listing available formats.
@item -V
@itemx --version
-Display version number information on @code{size} itself.
-
+Display the version number of @code{size}.
@end table
-@node strip, Index, size, Top
+@node strip, c++filt, size, Top
@chapter strip
@kindex strip
@cindex symbols, discarding
@smallexample
-strip [-F @var{format} | --format=@var{format} ]
- [-I @var{format} | --input-format=@var{format} ]
- [-O @var{format} | --output-format=@var{format} ]
+strip [ -F @var{format} | --format=@var{format} | --target=@var{format} ]
+ [ -I @var{format} | --input-format=@var{format} ]
+ [ -O @var{format} | --output-format=@var{format} ]
+ [ -s | --strip-all ] [ -S | -g | --strip-debug ]
+ [ -x | --discard-all ] [ -X | --discard-locals ]
[ -v | --verbose ] [ -V | --version ]
- @var{objfiles}@dots{}
+ @var{objfile}@dots{}
@end smallexample
GNU @code{strip} discards all symbols from object files
-@var{objfiles}. The list of object files may include archives.
+@var{objfile}. The list of object files may include archives.
@code{strip} will not execute unless at least one object file is listed.
-@quotation
-@emph{WARNING:} @code{strip} modifies the files named in its argument,
+@code{strip} modifies the files named in its argument,
rather than writing modified copies under different names.
-@end quotation
@table @code
@item -I @var{format}
@itemx --input-format=@var{format}
-Treat the original @var{objfiles} as files with the specified object
-code format.
+Treat the original @var{objfile} as a file with the object
+code format @var{format}.
@item -O @var{format}
@itemx --output-format=@var{format}
-Replace @var{objfiles} with files in the output format specified.
+Replace @var{objfile} with a file in the output format @var{format}.
@item -F @var{format}
@itemx --format=@var{format}
-Treat the original @var{objfiles} as files with the specified object
-code format, and rewrite them in the same format.
+@itemx --target=@var{format}
+Treat the original @var{objfile} as a file with the object
+code format @var{format}, and rewrite it in the same format.
+
+@item -s
+@itemx --strip-all
+Remove all symbols.
@item -g
@itemx -S
@item -X
@itemx --discard-locals
Remove compiler-generated local symbols.
-(These usually start with @code{L} or @code{.}.)
+(These usually start with @samp{L} or @samp{.}.)
@item -V
@itemx --version
-Show version number.
+Show the version number for @code{strip}.
@item -v
@itemx --verbose
Verbose output: list all object files modified. In the case of
-archives, @samp{strip -V} lists all members of the archive.
+archives, @samp{strip -v} lists all members of the archive.
@end table
-@node Index, , strip, Top
+@node c++filt, Index, strip, Top
+@chapter c++filt
+
+@kindex c++filt
+@cindex demangling C++ symbols
+
+The C++ language provides function overloading, which means that
+you can write many function with the same name (but taking
+different kinds of parameters). So that the linker can keep these
+overloaded functions from clashing, all C++ function names are
+encoded (``mangled'') into a funny-looking low-level assembly label.
+The @code{c++filt} program does the inverse mapping: It decodes
+(``demangles'') low-level names into user-level names.
+
+When you use @code{c++filt} as a filter (which is usually the case),
+it reads from standard input. 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 will replace the low-level name in the output.
+
+A typical use of @code{c++filt} is to pipe the output of @code{nm}
+though it.
+
+Note that on some systems, both the C and C++ compilers put an
+underscore in front of every name. (I.e. the C name @code{foo} gets the
+low-level name @code{_foo}.) On such systems, @code{c++filt} removes
+any initial underscore of a potential label.
+
+@node Index, , c++filt, Top
@unnumbered Index
@printindex cp
projects / binutils.git / blobdiff