strip
Discard symbols from object files.
Synopsis
strip
[-F bfdname
|--target=bfdname]
[-I bfdname
|--input-target=bfdname]
[-O bfdname
|--output-target=bfdname]
[-s|--strip-all]
[-S|-g|-d|--strip-debug]
[--strip-dwo]
[-K symbolname
|--keep-symbol=symbolname]
[-N symbolname
|--strip-symbol=symbolname]
[-w|--wildcard]
[-x|--discard-all]
[-X |--discard-locals]
[-R sectionname
|--remove-section=sectionname]
[-o file]
[-p|--preserve-dates]
[-D|--enable-deterministic-archives]
[-U|--disable-deterministic-archives]
[--keep-file-symbols]
[--only-keep-debug]
[-v |--verbose]
[-V|--version]
[--help] [--info]
objfile...
add an example, a script, a trick and tips
examples
description
GNU
strip discards all symbols from object files
objfile. The list of object files may include
archives. At least one object file must be given.
strip
modifies the files named in its argument, rather than
writing modified copies under different names.
options
-F
bfdname
--target=bfdname
Treat the original
objfile as a file with the object code format
bfdname, and rewrite it in the same format.
--help
Show a summary of the options
to strip and exit.
--info
Display a list showing all
architectures and object formats available.
-I bfdname
--input-target=bfdname
Treat the original
objfile as a file with the object code format
bfdname.
-O bfdname
--output-target=bfdname
Replace objfile with a
file in the output format bfdname.
-R
sectionname
--remove-section=sectionname
Remove any section named
sectionname from the output file. This option may be
given more than once. Note that using this option
inappropriately may make the output file unusable.
--strip-all
Remove all symbols.
--strip-debug
Remove debugging symbols
only.
--strip-dwo
Remove the contents of all
DWARF .dwo sections, leaving the remaining
debugging sections and all symbols intact. See the
description of this option in the objcopy section for
more information.
--strip-unneeded
Remove all symbols that are not
needed for relocation processing.
-K
symbolname
--keep-symbol=symbolname
When stripping symbols, keep
symbol symbolname even if it would normally be
stripped. This option may be given more than once.
-N
symbolname
--strip-symbol=symbolname
Remove symbol symbolname
from the source file. This option may be given more than
once, and may be combined with strip options other than
-K.
-o file
Put the stripped output in
file, rather than replacing the existing file. When
this argument is used, only one objfile argument may
be specified.
--preserve-dates
Preserve the access and
modification dates of the file.
--enable-deterministic-archives
Operate in deterministic
mode. When copying archive members and writing the archive
index, use zero for UIDs, GIDs, timestamps, and use
consistent file modes for all files.
If
binutils was configured with
--enable-deterministic-archives,
then this mode is on by default. It can be disabled with the
-U option, below.
--disable-deterministic-archives
Do not operate in
deterministic mode. This is the inverse of the
-D option, above: when copying archive members
and writing the archive index, use their actual
UID , GID , timestamp, and
file mode values.
This is the
default unless binutils was configured with
--enable-deterministic-archives.
--wildcard
Permit regular expressions in
symbolnames used in other command line options. The
question mark (?), asterisk (*), backslash (\) and square
brackets ([]) operators can be used anywhere in the symbol
name. If the first character of the symbol name is the
exclamation point (!) then the sense of the switch is
reversed for that symbol. For example:
-w -K !foo -K fo*
would cause
strip to only keep symbols that start with the letters
"fo", but to discard the symbol
"foo".
--discard-all
Remove non-global symbols.
--discard-locals
Remove compiler-generated local
symbols. (These usually start with L or
..)
--keep-file-symbols
When stripping a file, perhaps
with --strip-debug or
--strip-unneeded, retain any
symbols specifying source file names, which would otherwise
get stripped.
--only-keep-debug
Strip a file, removing contents
of any sections that would not be stripped by
--strip-debug and leaving the
debugging sections intact. In ELF files, this
preserves all note sections in the output.
The intention
is that this option will be used in conjunction with
--add-gnu-debuglink to create
a two part executable. One a stripped binary which will
occupy less space in RAM and in a
distribution and the second a debugging information file
which is only needed if debugging abilities are required.
The suggested procedure to create these files is as follows:
1.<Link the executable as normal. Assuming that is is
called>
"foo"
then...
1.<Run "objcopy
--only-keep-debug foo foo.dbg"
to>
create a file containing the
debugging info.
1.<Run "objcopy
--strip-debug foo" to create
a>
stripped executable.
1.<Run "objcopy
--add-gnu-debuglink=foo.dbg
foo">
to add a link to the debugging
info into the stripped executable.
Note---the
choice of ".dbg" as an extension for the
debug info file is arbitrary. Also the
"--only-keep-debug"
step is optional. You could instead do this:
1.<Link the executable as normal.>
1.<Copy "foo" to "foo.full">
1.<Run "strip --strip-debug
foo">
1.<Run "objcopy
--add-gnu-debuglink=foo.full
foo">
i.e., the file
pointed to by the
--add-gnu-debuglink can be
the full executable. It does not have to be a file created
by the --only-keep-debug
switch.
Note---this
switch is only intended for use on fully linked files. It
does not make sense to use it on object files where the
debugging information may be incomplete. Besides the
gnu_debuglink feature currently only supports the presence
of one filename containing debugging information, not
multiple filenames on a one-per-object-file basis.
--version
Show the version number for
strip.
--verbose
Verbose output: list all object
files modified. In the case of archives, strip
-v lists all members of the archive.
@file
Read command-line options from
file. The options read are inserted in place of the
original @file option. If file does not exist,
or cannot be read, then the option will be treated
literally, and not removed.
Options in
file are separated by whitespace. A whitespace
character may be included in an option by surrounding the
entire option in either single or double quotes. Any
character (including a backslash) may be included by
prefixing the character to be included with a backslash. The
file may itself contain additional @file
options; any such options will be processed recursively.
copyright
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
2010, 2011, 2012, 2013 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free
Documentation License, Version 1.3 or any later version published
by the Free Software Foundation; with no Invariant Sections, with
no Front-Cover Texts, and with no Back-Cover Texts. A copy of the
license is included in the section entitled " GNU
Free Documentation License".
see also
the Info
entries for binutils.