Could you provide the commands for building rootfs.cpio?

[Champollion9012]

As the title,
Could you provide any commands or scripts for building rootfs.cpio?
And I suggest you can add the debug information when compiling.

[bsauce]

I build my rootfs.cpio long long ago, as one rootfs.cpio can be used in all kernel bzImage.
So you can refer to this article.
https://www.zachpfeffer.com/single-post/build-the-linux-kernel-and-busybox-and-run-on-qemu