buildroot

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 needs a Linux kernel to be built"

    depends on !BR2_LINUX_KERNEL