ARMv7 Linux + Rust doesn't boot when compiling with only LLVM=1

Hello all,

I have the following problem: https://gitlab.postmarketos.org/postmarketOS/pmbootstrap/-/issues/2635

In short, what is happening is the following:

- The kernel boots and outputs via UART when I build the kernel with the following:

make LLVM=1 ARCH="$arm" CC="${CC:-gcc}"

- The kernel doesn't boot and there is no output via UART when I build the kernel with the following:

make LLVM=1 ARCH="$arm"

The only difference being: CC="${CC:-gcc}". Is this expected? I think this was present in the Linux kernel ever since Rust was enabled for ARMv7, and I never encountered it because postmarketOS was originally building the first way.

Thanks,

Rudraksha