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3 objcopy
*********

     objcopy [`-F' BFDNAME|`--target='BFDNAME]
             [`-I' BFDNAME|`--input-target='BFDNAME]
             [`-O' BFDNAME|`--output-target='BFDNAME]
             [`-B' BFDARCH|`--binary-architecture='BFDARCH]
             [`-S'|`--strip-all']
             [`-g'|`--strip-debug']
             [`-K' SYMBOLNAME|`--keep-symbol='SYMBOLNAME]
             [`-N' SYMBOLNAME|`--strip-symbol='SYMBOLNAME]
             [`--strip-unneeded-symbol='SYMBOLNAME]
             [`-G' SYMBOLNAME|`--keep-global-symbol='SYMBOLNAME]
             [`--localize-hidden']
             [`-L' SYMBOLNAME|`--localize-symbol='SYMBOLNAME]
             [`--globalize-symbol='SYMBOLNAME]
             [`-W' SYMBOLNAME|`--weaken-symbol='SYMBOLNAME]
             [`-w'|`--wildcard']
             [`-x'|`--discard-all']
             [`-X'|`--discard-locals']
             [`-b' BYTE|`--byte='BYTE]
             [`-i' [BREADTH]|`--interleave'[=BREADTH]]
             [`--interleave-width='WIDTH]
             [`-j' SECTIONPATTERN|`--only-section='SECTIONPATTERN]
             [`-R' SECTIONPATTERN|`--remove-section='SECTIONPATTERN]
             [`-p'|`--preserve-dates']
             [`-D'|`--enable-deterministic-archives']
             [`-U'|`--disable-deterministic-archives']
             [`--debugging']
             [`--gap-fill='VAL]
             [`--pad-to='ADDRESS]
             [`--set-start='VAL]
             [`--adjust-start='INCR]
             [`--change-addresses='INCR]
             [`--change-section-address' SECTIONPATTERN{=,+,-}VAL]
             [`--change-section-lma' SECTIONPATTERN{=,+,-}VAL]
             [`--change-section-vma' SECTIONPATTERN{=,+,-}VAL]
             [`--change-warnings'] [`--no-change-warnings']
             [`--set-section-flags' SECTIONPATTERN=FLAGS]
             [`--add-section' SECTIONNAME=FILENAME]
             [`--dump-section' SECTIONNAME=FILENAME]
             [`--rename-section' OLDNAME=NEWNAME[,FLAGS]]
             [`--long-section-names' {enable,disable,keep}]
             [`--change-leading-char'] [`--remove-leading-char']
             [`--reverse-bytes='NUM]
             [`--srec-len='IVAL] [`--srec-forceS3']
             [`--redefine-sym' OLD=NEW]
             [`--redefine-syms='FILENAME]
             [`--weaken']
             [`--keep-symbols='FILENAME]
             [`--strip-symbols='FILENAME]
             [`--strip-unneeded-symbols='FILENAME]
             [`--keep-global-symbols='FILENAME]
             [`--localize-symbols='FILENAME]
             [`--globalize-symbols='FILENAME]
             [`--weaken-symbols='FILENAME]
             [`--alt-machine-code='INDEX]
             [`--prefix-symbols='STRING]
             [`--prefix-sections='STRING]
             [`--prefix-alloc-sections='STRING]
             [`--add-gnu-debuglink='PATH-TO-FILE]
             [`--keep-file-symbols']
             [`--only-keep-debug']
             [`--strip-dwo']
             [`--extract-dwo']
             [`--extract-symbol']
             [`--writable-text']
             [`--readonly-text']
             [`--pure']
             [`--impure']
             [`--file-alignment='NUM]
             [`--heap='SIZE]
             [`--image-base='ADDRESS]
             [`--section-alignment='NUM]
             [`--stack='SIZE]
             [`--subsystem='WHICH:MAJOR.MINOR]
             [`--compress-debug-sections']
             [`--decompress-debug-sections']
             [`--dwarf-depth=N']
             [`--dwarf-start=N']
             [`-v'|`--verbose']
             [`-V'|`--version']
             [`--help'] [`--info']
             INFILE [OUTFILE]

   The GNU `objcopy' utility copies the contents of an object file to
another.  `objcopy' uses the GNU BFD Library to read and write the
object files.  It can write the destination object file in a format
different from that of the source object file.  The exact behavior of
`objcopy' is controlled by command-line options.  Note that `objcopy'
should be able to copy a fully linked file between any two formats.
However, copying a relocatable object file between any two formats may
not work as expected.

   `objcopy' creates temporary files to do its translations and deletes
them afterward.  `objcopy' uses BFD to do all its translation work; it
has access to all the formats described in BFD and thus is able to
recognize most formats without being told explicitly.  *Note BFD:
(ld.info)BFD.

   `objcopy' can be used to generate S-records by using an output
target of `srec' (e.g., use `-O srec').

   `objcopy' can be used to generate a raw binary file by using an
output target of `binary' (e.g., use `-O binary').  When `objcopy'
generates a raw binary file, it will essentially produce a memory dump
of the contents of the input object file.  All symbols and relocation
information will be discarded.  The memory dump will start at the load
address of the lowest section copied into the output file.

   When generating an S-record or a raw binary file, it may be helpful
to use `-S' to remove sections containing debugging information.  In
some cases `-R' will be useful to remove sections which contain
information that is not needed by the binary file.

   Note--`objcopy' is not able to change the endianness of its input
files.  If the input format has an endianness (some formats do not),
`objcopy' can only copy the inputs into file formats that have the same
endianness or which have no endianness (e.g., `srec').  (However, see
the `--reverse-bytes' option.)

`INFILE'
`OUTFILE'
     The input and output files, respectively.  If you do not specify
     OUTFILE, `objcopy' creates a temporary file and destructively
     renames the result with the name of INFILE.

`-I BFDNAME'
`--input-target=BFDNAME'
     Consider the source file's object format to be BFDNAME, rather than
     attempting to deduce it.  *Note Target Selection::, for more
     information.

`-O BFDNAME'
`--output-target=BFDNAME'
     Write the output file using the object format BFDNAME.  *Note
     Target Selection::, for more information.

`-F BFDNAME'
`--target=BFDNAME'
     Use BFDNAME as the object format for both the input and the output
     file; i.e., simply transfer data from source to destination with no
     translation.  *Note Target Selection::, for more information.

`-B BFDARCH'
`--binary-architecture=BFDARCH'
     Useful when transforming a architecture-less input file into an
     object file.  In this case the output architecture can be set to
     BFDARCH.  This option will be ignored if the input file has a
     known BFDARCH.  You can access this binary data inside a program
     by referencing the special symbols that are created by the
     conversion process.  These symbols are called
     _binary_OBJFILE_start, _binary_OBJFILE_end and
     _binary_OBJFILE_size.  e.g. you can transform a picture file into
     an object file and then access it in your code using these symbols.

`-j SECTIONPATTERN'
`--only-section=SECTIONPATTERN'
     Copy only the indicated sections from the input file to the output
     file.  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.

`-R SECTIONPATTERN'
`--remove-section=SECTIONPATTERN'
     Remove any section matching SECTIONPATTERN from the output file.
     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.  Using both the `-j'
     and `-R' options together results in undefined behaviour.

`-S'
`--strip-all'
     Do not copy relocation and symbol information from the source file.

`-g'
`--strip-debug'
     Do not copy debugging symbols or sections from the source file.

`--strip-unneeded'
     Strip 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'
     Do not copy symbol SYMBOLNAME from the source file.  This option
     may be given more than once.

`--strip-unneeded-symbol=SYMBOLNAME'
     Do not copy symbol SYMBOLNAME from the source file unless it is
     needed by a relocation.  This option may be given more than once.

`-G SYMBOLNAME'
`--keep-global-symbol=SYMBOLNAME'
     Keep only symbol SYMBOLNAME global.  Make all other symbols local
     to the file, so that they are not visible externally.  This option
     may be given more than once.

`--localize-hidden'
     In an ELF object, mark all symbols that have hidden or internal
     visibility as local.  This option applies on top of
     symbol-specific localization options such as `-L'.

`-L SYMBOLNAME'
`--localize-symbol=SYMBOLNAME'
     Make symbol SYMBOLNAME local to the file, so that it is not
     visible externally.  This option may be given more than once.

`-W SYMBOLNAME'
`--weaken-symbol=SYMBOLNAME'
     Make symbol SYMBOLNAME weak. This option may be given more than
     once.

`--globalize-symbol=SYMBOLNAME'
     Give symbol SYMBOLNAME global scoping so that it is visible
     outside of the file in which it is defined.  This option may be
     given more than once.

`-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 -W !foo -W fo*

     would cause objcopy to weaken all symbols that start with "fo"
     except for the symbol "foo".

`-x'
`--discard-all'
     Do not copy non-global symbols from the source file.

`-X'
`--discard-locals'
     Do not copy compiler-generated local symbols.  (These usually
     start with `L' or `.'.)

`-b BYTE'
`--byte=BYTE'
     If interleaving has been enabled via the `--interleave' option
     then start the range of bytes to keep at the BYTEth byte.  BYTE
     can be in the range from 0 to BREADTH-1, where BREADTH is the
     value given by the `--interleave' option.

`-i [BREADTH]'
`--interleave[=BREADTH]'
     Only copy a range out of every BREADTH bytes.  (Header data is not
     affected).  Select which byte in the range begins the copy with
     the `--byte' option.  Select the width of the range with the
     `--interleave-width' option.

     This option is useful for creating files to program ROM.  It is
     typically used with an `srec' output target.  Note that `objcopy'
     will complain if you do not specify the `--byte' option as well.

     The default interleave breadth is 4, so with `--byte' set to 0,
     `objcopy' would copy the first byte out of every four bytes from
     the input to the output.

`--interleave-width=WIDTH'
     When used with the `--interleave' option, copy WIDTH bytes at a
     time.  The start of the range of bytes to be copied is set by the
     `--byte' option, and the extent of the range is set with the
     `--interleave' option.

     The default value for this option is 1.  The value of WIDTH plus
     the BYTE value set by the `--byte' option must not exceed the
     interleave breadth set by the `--interleave' option.

     This option can be used to create images for two 16-bit flashes
     interleaved in a 32-bit bus by passing `-b 0 -i 4
     --interleave-width=2' and `-b 2 -i 4 --interleave-width=2' to two
     `objcopy' commands.  If the input was '12345678' then the outputs
     would be '1256' and '3478' respectively.

`-p'
`--preserve-dates'
     Set the access and modification dates of the output file to be the
     same as those of the input 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'.

`--debugging'
     Convert debugging information, if possible.  This is not the
     default because only certain debugging formats are supported, and
     the conversion process can be time consuming.

`--gap-fill VAL'
     Fill gaps between sections with VAL.  This operation applies to
     the _load address_ (LMA) of the sections.  It is done by increasing
     the size of the section with the lower address, and filling in the
     extra space created with VAL.

`--pad-to ADDRESS'
     Pad the output file up to the load address ADDRESS.  This is done
     by increasing the size of the last section.  The extra space is
     filled in with the value specified by `--gap-fill' (default zero).

`--set-start VAL'
     Set the start address of the new file to VAL.  Not all object file
     formats support setting the start address.

`--change-start INCR'
`--adjust-start INCR'
     Change the start address by adding INCR.  Not all object file
     formats support setting the start address.

`--change-addresses INCR'
`--adjust-vma INCR'
     Change the VMA and LMA addresses of all sections, as well as the
     start address, by adding INCR.  Some object file formats do not
     permit section addresses to be changed arbitrarily.  Note that
     this does not relocate the sections; if the program expects
     sections to be loaded at a certain address, and this option is
     used to change the sections such that they are loaded at a
     different address, the program may fail.

`--change-section-address SECTIONPATTERN{=,+,-}VAL'
`--adjust-section-vma SECTIONPATTERN{=,+,-}VAL'
     Set or change both the VMA address and the LMA address of any
     section matching SECTIONPATTERN.  If `=' is used, the section
     address is set to VAL.  Otherwise, VAL is added to or subtracted
     from the section address.  See the comments under
     `--change-addresses', above. If SECTIONPATTERN does not match any
     sections in the input file, a warning will be issued, unless
     `--no-change-warnings' is used.

`--change-section-lma SECTIONPATTERN{=,+,-}VAL'
     Set or change the LMA address of any sections matching
     SECTIONPATTERN.  The LMA address is the address where the section
     will be loaded into memory at program load time.  Normally this is
     the same as the VMA address, which is the address of the section
     at program run time, but on some systems, especially those where a
     program is held in ROM, the two can be different.  If `=' is used,
     the section address is set to VAL.  Otherwise, VAL is added to or
     subtracted from the section address.  See the comments under
     `--change-addresses', above.  If SECTIONPATTERN does not match any
     sections in the input file, a warning will be issued, unless
     `--no-change-warnings' is used.

`--change-section-vma SECTIONPATTERN{=,+,-}VAL'
     Set or change the VMA address of any section matching
     SECTIONPATTERN.  The VMA address is the address where the section
     will be located once the program has started executing.  Normally
     this is the same as the LMA address, which is the address where
     the section will be loaded into memory, but on some systems,
     especially those where a program is held in ROM, the two can be
     different.  If `=' is used, the section address is set to VAL.
     Otherwise, VAL is added to or subtracted from the section address.
     See the comments under `--change-addresses', above.  If
     SECTIONPATTERN does not match any sections in the input file, a
     warning will be issued, unless `--no-change-warnings' is used.

`--change-warnings'
`--adjust-warnings'
     If `--change-section-address' or `--change-section-lma' or
     `--change-section-vma' is used, and the section pattern does not
     match any sections, issue a warning.  This is the default.

`--no-change-warnings'
`--no-adjust-warnings'
     Do not issue a warning if `--change-section-address' or
     `--adjust-section-lma' or `--adjust-section-vma' is used, even if
     the section pattern does not match any sections.

`--set-section-flags SECTIONPATTERN=FLAGS'
     Set the flags for any sections matching SECTIONPATTERN.  The FLAGS
     argument is a comma separated string of flag names.  The
     recognized names are `alloc', `contents', `load', `noload',
     `readonly', `code', `data', `rom', `share', and `debug'.  You can
     set the `contents' flag for a section which does not have
     contents, but it is not meaningful to clear the `contents' flag of
     a section which does have contents-just remove the section
     instead.  Not all flags are meaningful for all object file formats.

`--add-section SECTIONNAME=FILENAME'
     Add a new section named SECTIONNAME while copying the file.  The
     contents of the new section are taken from the file FILENAME.  The
     size of the section will be the size of the file.  This option only
     works on file formats which can support sections with arbitrary
     names.  Note - it may be necessary to use the `--set-section-flags'
     option to set the attributes of the newly created section.

`--dump-section SECTIONNAME=FILENAME'
     Place the contents of section named SECTIONNAME into the file
     FILENAME, overwriting any contents that may have been there
     previously.  This option is the inverse of `--add-section'.  This
     option is similar to the `--only-section' option except that it
     does not create a formatted file, it just dumps the contents as
     raw binary data, without applying any relocations.  The option can
     be specified more than once.

`--rename-section OLDNAME=NEWNAME[,FLAGS]'
     Rename a section from OLDNAME to NEWNAME, optionally changing the
     section's flags to FLAGS in the process.  This has the advantage
     over usng a linker script to perform the rename in that the output
     stays as an object file and does not become a linked executable.

     This option is particularly helpful when the input format is
     binary, since this will always create a section called .data.  If
     for example, you wanted instead to create a section called .rodata
     containing binary data you could use the following command line to
     achieve it:

            objcopy -I binary -O <output_format> -B <architecture> \
             --rename-section .data=.rodata,alloc,load,readonly,data,contents \
             <input_binary_file> <output_object_file>

`--long-section-names {enable,disable,keep}'
     Controls the handling of long section names when processing `COFF'
     and `PE-COFF' object formats.  The default behaviour, `keep', is
     to preserve long section names if any are present in the input
     file.  The `enable' and `disable' options forcibly enable or
     disable the use of long section names in the output object; when
     `disable' is in effect, any long section names in the input object
     will be truncated.  The `enable' option will only emit long
     section names if any are present in the inputs; this is mostly the
     same as `keep', but it is left undefined whether the `enable'
     option might force the creation of an empty string table in the
     output file.

`--change-leading-char'
     Some object file formats use special characters at the start of
     symbols.  The most common such character is underscore, which
     compilers often add before every symbol.  This option tells
     `objcopy' to change the leading character of every symbol when it
     converts between object file formats.  If the object file formats
     use the same leading character, this option has no effect.
     Otherwise, it will add a character, or remove a character, or
     change a character, as appropriate.

`--remove-leading-char'
     If the first character of a global symbol is a special symbol
     leading character used by the object file format, remove the
     character.  The most common symbol leading character is
     underscore.  This option will remove a leading underscore from all
     global symbols.  This can be useful if you want to link together
     objects of different file formats with different conventions for
     symbol names.  This is different from `--change-leading-char'
     because it always changes the symbol name when appropriate,
     regardless of the object file format of the output file.

`--reverse-bytes=NUM'
     Reverse the bytes in a section with output contents.  A section
     length must be evenly divisible by the value given in order for
     the swap to be able to take place. Reversing takes place before
     the interleaving is performed.

     This option is used typically in generating ROM images for
     problematic target systems.  For example, on some target boards,
     the 32-bit words fetched from 8-bit ROMs are re-assembled in
     little-endian byte order regardless of the CPU byte order.
     Depending on the programming model, the endianness of the ROM may
     need to be modified.

     Consider a simple file with a section containing the following
     eight bytes:  `12345678'.

     Using `--reverse-bytes=2' for the above example, the bytes in the
     output file would be ordered `21436587'.

     Using `--reverse-bytes=4' for the above example, the bytes in the
     output file would be ordered `43218765'.

     By using `--reverse-bytes=2' for the above example, followed by
     `--reverse-bytes=4' on the output file, the bytes in the second
     output file would be ordered `34127856'.

`--srec-len=IVAL'
     Meaningful only for srec output.  Set the maximum length of the
     Srecords being produced to IVAL.  This length covers both address,
     data and crc fields.

`--srec-forceS3'
     Meaningful only for srec output.  Avoid generation of S1/S2
     records, creating S3-only record format.

`--redefine-sym OLD=NEW'
     Change the name of a symbol OLD, to NEW.  This can be useful when
     one is trying link two things together for which you have no
     source, and there are name collisions.

`--redefine-syms=FILENAME'
     Apply `--redefine-sym' to each symbol pair "OLD NEW" listed in the
     file FILENAME.  FILENAME is simply a flat file, with one symbol
     pair per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

`--weaken'
     Change all global symbols in the file to be weak.  This can be
     useful when building an object which will be linked against other
     objects using the `-R' option to the linker.  This option is only
     effective when using an object file format which supports weak
     symbols.

`--keep-symbols=FILENAME'
     Apply `--keep-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name
     per line.  Line comments may be introduced by the hash character.
     This option may be given more than once.

`--strip-symbols=FILENAME'
     Apply `--strip-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name
     per line.  Line comments may be introduced by the hash character.
     This option may be given more than once.

`--strip-unneeded-symbols=FILENAME'
     Apply `--strip-unneeded-symbol' option to each symbol listed in
     the file FILENAME.  FILENAME is simply a flat file, with one
     symbol name per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

`--keep-global-symbols=FILENAME'
     Apply `--keep-global-symbol' option to each symbol listed in the
     file FILENAME.  FILENAME is simply a flat file, with one symbol
     name per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

`--localize-symbols=FILENAME'
     Apply `--localize-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name
     per line.  Line comments may be introduced by the hash character.
     This option may be given more than once.

`--globalize-symbols=FILENAME'
     Apply `--globalize-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name
     per line.  Line comments may be introduced by the hash character.
     This option may be given more than once.

`--weaken-symbols=FILENAME'
     Apply `--weaken-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name
     per line.  Line comments may be introduced by the hash character.
     This option may be given more than once.

`--alt-machine-code=INDEX'
     If the output architecture has alternate machine codes, use the
     INDEXth code instead of the default one.  This is useful in case a
     machine is assigned an official code and the tool-chain adopts the
     new code, but other applications still depend on the original code
     being used.  For ELF based architectures if the INDEX alternative
     does not exist then the value is treated as an absolute number to
     be stored in the e_machine field of the ELF header.

`--writable-text'
     Mark the output text as writable.  This option isn't meaningful
     for all object file formats.

`--readonly-text'
     Make the output text write protected.  This option isn't
     meaningful for all object file formats.

`--pure'
     Mark the output file as demand paged.  This option isn't
     meaningful for all object file formats.

`--impure'
     Mark the output file as impure.  This option isn't meaningful for
     all object file formats.

`--prefix-symbols=STRING'
     Prefix all symbols in the output file with STRING.

`--prefix-sections=STRING'
     Prefix all section names in the output file with STRING.

`--prefix-alloc-sections=STRING'
     Prefix all the names of all allocated sections in the output file
     with STRING.

`--add-gnu-debuglink=PATH-TO-FILE'
     Creates a .gnu_debuglink section which contains a reference to
     PATH-TO-FILE and adds it to the output file.

`--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 `objcopy --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.

`--strip-dwo'
     Remove the contents of all DWARF .dwo sections, leaving the
     remaining debugging sections and all symbols intact.  This option
     is intended for use by the compiler as part of the `-gsplit-dwarf'
     option, which splits debug information between the .o file and a
     separate .dwo file.  The compiler generates all debug information
     in the same file, then uses the `--extract-dwo' option to copy the
     .dwo sections to the .dwo file, then the `--strip-dwo' option to
     remove those sections from the original .o file.

`--extract-dwo'
     Extract the contents of all DWARF .dwo sections.  See the
     `--strip-dwo' option for more information.

`--file-alignment NUM'
     Specify the file alignment.  Sections in the file will always
     begin at file offsets which are multiples of this number.  This
     defaults to 512.  [This option is specific to PE targets.]

`--heap RESERVE'
`--heap RESERVE,COMMIT'
     Specify the number of bytes of memory to reserve (and optionally
     commit) to be used as heap for this program.  [This option is
     specific to PE targets.]

`--image-base VALUE'
     Use VALUE as the base address of your program or dll.  This is the
     lowest memory location that will be used when your program or dll
     is loaded.  To reduce the need to relocate and improve performance
     of your dlls, each should have a unique base address and not
     overlap any other dlls.  The default is 0x400000 for executables,
     and 0x10000000 for dlls.  [This option is specific to PE targets.]

`--section-alignment NUM'
     Sets the section alignment.  Sections in memory will always begin
     at addresses which are a multiple of this number.  Defaults to
     0x1000.  [This option is specific to PE targets.]

`--stack RESERVE'
`--stack RESERVE,COMMIT'
     Specify the number of bytes of memory to reserve (and optionally
     commit) to be used as stack for this program.  [This option is
     specific to PE targets.]

`--subsystem WHICH'
`--subsystem WHICH:MAJOR'
`--subsystem WHICH:MAJOR.MINOR'
     Specifies the subsystem under which your program will execute.  The
     legal values for WHICH are `native', `windows', `console',
     `posix', `efi-app', `efi-bsd', `efi-rtd', `sal-rtd', and `xbox'.
     You may optionally set the subsystem version also.  Numeric values
     are also accepted for WHICH.  [This option is specific to PE
     targets.]

`--extract-symbol'
     Keep the file's section flags and symbols but remove all section
     data.  Specifically, the option:

        * removes the contents of all sections;

        * sets the size of every section to zero; and

        * sets the file's start address to zero.

     This option is used to build a `.sym' file for a VxWorks kernel.
     It can also be a useful way of reducing the size of a
     `--just-symbols' linker input file.

`--compress-debug-sections'
     Compress DWARF debug sections using zlib.

`--decompress-debug-sections'
     Decompress DWARF debug sections using zlib.

`-V'
`--version'
     Show the version number of `objcopy'.

`-v'
`--verbose'
     Verbose output: list all object files modified.  In the case of
     archives, `objcopy -V' lists all members of the archive.

`--help'
     Show a summary of the options to `objcopy'.

`--info'
     Display a list showing all architectures and object formats
     available.


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