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File: binutils.info,  Node: strip,  Next: c++filt,  Prev: strings,  Up: Top

8 strip
*******

     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.  *Note Target
     Selection::, for more information.

`--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.  *Note Target Selection::, for more information.

`-O BFDNAME'
`--output-target=BFDNAME'
     Replace OBJFILE with a file in the output format BFDNAME.  *Note
     Target Selection::, for more information.

`-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 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...

       2. Run `objcopy --only-keep-debug foo foo.dbg' to create a file
          containing the debugging info.

       3. Run `objcopy --strip-debug foo' to create a stripped
          executable.

       4. 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.

       2. Copy `foo' to `foo.full'

       3. Run `strip --strip-debug foo'

       4. 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.