For each Cpu your toolchain supports, you must create a file called target/h/make/make.CpuTool. The easiest starting point is by copying installDir/target/h/make/make.Cpugnu and overriding macros for your particular toolchain. At the end of this chapter is a version of make.PPC604diab that has been tested with Tornado 2.0. In it you will find comments about what kinds of changes were made.