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STRIP(1)		     GNU Development Tools		      STRIP(1)

NAME
       strip - discard symbols and other data 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]
	     [-M|--merge-notes][--no-merge-notes]
	     [-N symbolname |--strip-symbol=symbolname]
	     [-w|--wildcard]
	     [-x|--discard-all]	[-X |--discard-locals]
	     [-R sectionname |--remove-section=sectionname]
	     [--keep-section=sectionpattern]
	     [--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...

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, 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'.

       --keep-section=sectionpattern
	   When	removing sections from the output file,	keep sections that
	   match sectionpattern.

       --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
       --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	unless stripping debug or DWO
	   information.

       -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.

       -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.

       --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 it 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.

       -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.

SEE ALSO
       the Info	entries	for binutils.

COPYRIGHT
       Copyright (c) 1991-2020 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".

binutils-2.34			  2021-03-01			      STRIP(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COPYRIGHT

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