Building and cross-compiling kernel source on Mac OS

Hi, I have a Mac Book Pro with macOS High Sierra 10.13.x installed (with Mac OS Extended (Journaled, Encrypted)). I also have the Xcode installed so I can compile a C program using gcc. Now, I wanted to build linux kernel code (cross compile for arm or risc-v) on Mac OS. I know this is possible, but I am not familiar with the steps. If somebody have the step by step guide, please share. If this works, then I don't need to use Virtual Box inside MAC to build the kernel code. Thanks, Pintu