There may be some features configure can not figure out
automatically, but needs to determine by the type of host the package
will run on. Usually configure can figure that out, but if it
prints a message saying it can not guess the host type, give it the
`--host=type' option. type can either be a short name
for the system type, such as `sun4', or a canonical name with three
fields:
cpu-company-system
See the file `config.sub' for the possible values of each field. If `config.sub' isn't included in this package, then this package doesn't need to know the host type.
If you are building compiler tools for cross-compiling, you can also use the `--target=type' option to select the type of system they will produce code for and the `--build=type' option to select the type of system on which you are compiling the package.