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(binutils.info)Target Selection

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Target Selection
================

   A "target" is an object file format.  A given target may be
supported for multiple architectures (Note: Architecture Selection).
A target selection may also have variations for different operating
systems or architectures.

   The command to list valid target values is `objdump -i' (the first
column of output contains the relevant information).

   Some sample values are: `a.out-hp300bsd', `ecoff-littlemips',
`a.out-sunos-big'.

   You can also specify a target using a configuration triplet.  This is
the same sort of name that is passed to `configure' to specify a
target.  When you use a configuration triplet as an argument, it must be
fully canonicalized.  You can see the canonical version of a triplet by
running the shell script `config.sub' which is included with the
sources.

   Some sample configuration triplets are: `m68k-hp-bsd',
`mips-dec-ultrix', `sparc-sun-sunos'.

`objdump' Target
----------------

   Ways to specify:

  1. command line option: `-b' or `--target'

  2. environment variable `GNUTARGET'

  3. deduced from the input file

`objcopy' and `strip' Input Target
----------------------------------

   Ways to specify:

  1. command line options: `-I' or `--input-target', or `-F' or
     `--target'

  2. environment variable `GNUTARGET'

  3. deduced from the input file

`objcopy' and `strip' Output Target
-----------------------------------

   Ways to specify:

  1. command line options: `-O' or `--output-target', or `-F' or
     `--target'

  2. the input target (see "`objcopy' and `strip' Input Target" above)

  3. environment variable `GNUTARGET'

  4. deduced from the input file

`nm', `size', and `strings' Target
----------------------------------

   Ways to specify:

  1. command line option: `--target'

  2. environment variable `GNUTARGET'

  3. deduced from the input file

Linker Input Target
-------------------

   Ways to specify:

  1. command line option: `-b' or `--format' (*note Options:
     (ld.info)Options.)

  2. script command `TARGET' (Note: Option Commands
     Commands.)

  3. environment variable `GNUTARGET' (*note Environment:
     (ld.info)Environment.)

  4. the default target of the selected linker emulation (Note: Linker
     Emulation Selection)

Linker Output Target
--------------------

   Ways to specify:

  1. command line option: `-oformat' (Note: Options.)

  2. script command `OUTPUT_FORMAT' (*note Option Commands:
     (ld.info)Option Commands.)

  3. the linker input target (see "Linker Input Target" above)