strip






strip − Discard symbols from object files.

strip [−F bfdname |−−target=bfdname]
      [−I bfdname |−−input−target=bfdname]
      [−O bfdname |−−output−target=bfdname]
      [−s|−−strip−all]
      [−S|−g|−d|−−strip−debug]
      [−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]
      [−−keep−file−symbols]
      [−−only−keep−debug]
      [−v |−−verbose] [−V|−−version]
      [−−help] [−−info]
      objfile...

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.



−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.











                             ‐2‐


−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.

−s

−−strip−all
    Remove all symbols.

−g

−S

−d

−−strip−debug
    Remove debugging symbols only.

−−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.

−p

−−preserve−dates
    Preserve the access and modification dates of the file.

−w

−−wildcard
    Permit regular expressions in symbolnames used in other









                             ‐3‐


    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".

−x

−−discard−all
    Remove non‐global symbols.

−X

−−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









                             ‐4‐


        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.

−V

−−version
    Show the version number for strip.

−v

−−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.










                             ‐5‐


the Info entries for binutils.

Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
2008, 2009, 2010, 2011 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".