initramfs-tools needs tighter busybox dependency

[Nolan Eakins]

About a couple months ago on a fairly fresh 64 bit Raspbian install I added the armhf repository and installed the 32 bit libc to run 32 bit programs. This pulled in a 32 bit Busybox. I did not notice until I did an upgrade (Jan 2023) with a new kernel needing a new initramfs. I ran mkinitramfs like I've ione prior but the kernel would fail to use it.

Took awhile but I found out the initramfs that was generated had a 32 bit busybox with none of the linked libraries included. That's why it failed. initramfs-tools thought it would be happy with busybox:armhf.

I tried the busybox-static:aarch64 to many errors about run-init arguments. I finally tried building an initramfs while busybox:aarch64 was installed to much success.

My fix to all this would be explicitly making initramfs-tools depend on the busybox for the system's arch.

Apologies for the lack of logs. They were typical errors from Linux not having a root FS.