config BR2_TARGET_ROOTFS_TAR bool "tar the root filesystem" default y help Build a tar archive of the root filesystem choice prompt "Compression method" default BR2_TARGET_ROOTFS_TAR_NONE depends on BR2_TARGET_ROOTFS_TAR help Select compressor for tar archive of the root filesystem config BR2_TARGET_ROOTFS_TAR_NONE bool "no compression" help Do not compress the tarball. config BR2_TARGET_ROOTFS_TAR_GZIP bool "gzip" help Do compress the tarball with gzip. config BR2_TARGET_ROOTFS_TAR_BZIP2 bool "bzip2" help Do compress the tarball with bzip2. config BR2_TARGET_ROOTFS_TAR_LZ4 bool "lz4" help Do compress the tarball with lz4. config BR2_TARGET_ROOTFS_TAR_LZMA bool "lzma" help Do compress the tarball with lzma. config BR2_TARGET_ROOTFS_TAR_LZO bool "lzo" help Do compress the tarball with lzop. config BR2_TARGET_ROOTFS_TAR_XZ bool "xz" help Do compress the tarball with xz. endchoice config BR2_TARGET_ROOTFS_TAR_OPTIONS string "other random options to pass to tar" depends on BR2_TARGET_ROOTFS_TAR default "" help Any other flags you want to pass to tar Refer to tar --help for details