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]
      [−−strip−dwo]
      [−K symbolname|−−keep−symbol=symbolname]
      [−M|−−merge−notes][−−no−merge−notes]
      [−N symbolname |−−strip−symbol=symbolname]
      [−w|−−wildcard]
      [−x|−−discard−all] [−X |−−discard−locals]
      [−R sectionname |−−remove−section=sectionname]
      [−−remove−relocations=sectionpattern]
      [−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...

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










                             ‐2‐


−−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, in addition to whatever sections would otherwise
    be removed.  This option may be given more than once.
    Note that using this option inappropriately may make the
    output file unusable.  The wildcard character * may be
    given at the end of sectionname.  If so, then any
    section starting with sectionname will be removed.

    If the first character of sectionpattern is the
    exclamation point (!) then matching sections will not be
    removed even if an earlier use of −−remove−section on
    the same command line would otherwise remove it.  For
    example:

              −−remove−section=.text.* −−remove−section=!.text.foo

    will remove all sections matching the pattern ’.text.*’,
    but will not remove the section ’.text.foo’.

−−remove−relocations=sectionpattern
    Remove relocations from the output file for any section
    matching sectionpattern.  This option may be given more
    than once.  Note that using this option inappropriately
    may make the output file unusable.  Wildcard characters
    are accepted in sectionpattern.  For example:

              −−remove−relocations=.text.*

    will remove the relocations for all sections matching
    the patter ’.text.*’.

    If the first character of sectionpattern is the
    exclamation point (!) then matching sections will not
    have their relocation removed even if an earlier use of
    −−remove−relocations on the same command line would
    otherwise cause the relocations to be removed.  For
    example:

              −−remove−relocations=.text.* −−remove−relocations=!.text.foo

    will remove all relocations for sections matching the
    pattern ’.text.*’, but will not remove relocations for
    the section ’.text.foo’.

−s











                             ‐3‐


−−strip−all
    Remove all symbols.

−g

−S

−d

−−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.

−M

−−merge−notes

−−no−merge−notes
    For ELF files, attempt (or do not attempt) to reduce the
    size of any SHT_NOTE type sections by removing duplicate
    notes.  The default is to attempt this reduction.

−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.









                             ‐4‐


−D

−−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.

−U

−−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.

−w

−−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".

−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.









                             ‐5‐


−−only−keep−debug
    Strip a file, emptying the contents of any sections that
    would not be stripped by −−strip−debug and leaving the
    debugging sections intact.  In ELF files, this preserves
    all the note sections in the output as well.

    Note − the section headers of the stripped sections are
    preserved, including their sizes, but the contents of
    the section are discarded.  The section headers are
    preserved so that other tools can match up the debuginfo
    file with the real executable, even if that executable
    has been relocated to a different address space.

    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









                             ‐6‐


        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.

the Info entries for binutils.

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of the license is included in the section entitled "GNU Free
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