autoconf: System Type

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1 16.7 Specifying the System Type
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1 There may be some features `configure' cannot figure out automatically,
1 but needs to determine by the type of machine the package will run on.
1 Usually, assuming the package is built to be run on the _same_
1 architectures, `configure' can figure that out, but if it prints a
1 message saying it cannot guess the machine type, give it the
1 `--build=TYPE' option.  TYPE can either be a short name for the system
1 type, such as `sun4', or a canonical name which has the form:
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1      CPU-COMPANY-SYSTEM
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1 where SYSTEM can have one of these forms:
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1      OS
1      KERNEL-OS
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1    See the file `config.sub' for the possible values of each field.  If
1 `config.sub' isn't included in this package, then this package doesn't
1 need to know the machine type.
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1    If you are _building_ compiler tools for cross-compiling, you should
1 use the option `--target=TYPE' to select the type of system they will
1 produce code for.
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1    If you want to _use_ a cross compiler, that generates code for a
1 platform different from the build platform, you should specify the
1 "host" platform (i.e., that on which the generated programs will
1 eventually be run) with `--host=TYPE'.
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