CPIO Kernel Image Build Order for initramfs

(Forgive me if this list isn't for questions, please direct me to the right place. This is my first message to the list)

I want to build full executable images, with the rootfs built into the kernel without compression, so I'm using CPIO. But, buildroot doesn't seem to like this when starting from a clean slate.

It wants to build the kernel before the image, but if I do that, I get this error.

make[4]: *** No rule to make target '../../images/rootfs.cpio', needed by 'usr/initramfs_inc_data'. Stop.

Right now, my process is: touch an empty images/rootfs.cpio file, compile, touch the kernel config, recompile and this works but it's yucky.

What is the "right" answer?

Charles

Hi Charles,

Quoted 8 lines · Charles Lohr

(Forgive me if this list isn't for questions, please direct me to the right
place. This is my first message to the list)

I want to build full executable images, with the rootfs built into the kernel without compression, so I'm using CPIO. But, buildroot doesn't seem
to like this when starting from a clean slate.

You can enable this under 'Filesystem images' -> 'Initial RAM filesystem linked into Linux kernel' (BR2_TARGET_ROOTFS_INITRAMFS). This will execute the steps you now perform manually.

Quoted 12 lines

It wants to build the kernel before the image, but if I do that, I get this
error.

make[4]: *** No rule to make target '../../images/rootfs.cpio', needed by
'usr/initramfs_inc_data'. Stop.

Right now, my process is: touch an empty images/rootfs.cpio file, compile,
touch the kernel config, recompile and this works but it's yucky.

Quoted 3 lines

What is the "right" answer?

Charles

Kind regards,
Andreas