Target Selection

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Target selection

A target is an object file format. A given target may be supported for multiple architectures (see 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’.

objdump target

Ways to specify:

command line option: ‘-b’ or‘--target’
environment variable GNUTARGET
deduced from the input file

objcopy and strip input target

Ways to specify:

command line options, -I, --input-target, -F, or --target
environment variable, GNUTARGET
deduced from the input file

objcopy and strip output target

Ways to specify:

command line options, -O, --output-target, -F, or --target
the input target (see objcopy and strip input Target)
environment variable, GNUTARGET
deduced from the input file

nm, size, and strings target

Ways to specify:

command line option, --target
environment variable GNUTARGET
deduced from the input file

Linker input target

Ways to specify:

command line option, -b or --format (see Command line options in Using ld)
script command, TARGET (see Commands dealing with object file formats in Using ld)
environment variable, GNUTARGET (see Environment variables in Using ld)
the default target of the selected linker emulation (see Linker emulation selection).

Linker output target

Ways to specify:

command line option, -oformat (see Command line options in Using ld)
script command, OUTPUT_FORMAT (see Commands dealing with object file formats in Using ld)
the linker input target (see Linker input target)

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