To build GNU CC as a cross-compiler, you start out by running `configure'. Use the `--target=target' to specify the target type. If `configure' was unable to correctly identify the system you are running on, also specify the `--build=build' option. For example, here is how to configure for a cross-compiler that produces code for an HP 68030 system running BSD on a system that `configure' can correctly identify:
./configure --target=m68k-hp-bsd4.3