config BR2_TARGET_ROOTFS_INITRAMFS bool "initial RAM filesystem linked into linux kernel" depends on BR2_LINUX_KERNEL select BR2_TARGET_ROOTFS_CPIO help Integrate the root filesystem generated by Buildroot as an initramfs inside the kernel image. This integration will take place automatically. A rootfs.cpio file will be generated in the images/ directory. This is the archive that will be included in the kernel image. The default rootfs compression set in the kernel configuration is used, regardless of how buildroot's cpio archive is configured. Note that enabling initramfs together with another filesystem formats doesn't make sense: you would end up having two identical root filesystems, one embedded inside the kernel image, and one separately. comment "initramfs requires a Linux kernel to be built" depends on !BR2_LINUX_KERNEL