config BR2_TARGET_ROOTFS_SQUASHFS
	bool "squashfs root filesystem"
	help
	  Build a squashfs root filesystem

if BR2_TARGET_ROOTFS_SQUASHFS

choice
	prompt "block size"
	default BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
	help
	  Data block size. Bigger values can improve
	  compression ratio.

	  If unsure, leave at 128k (default).

config BR2_TARGET_ROOTFS_SQUASHFS_BS_4K
	bool "4k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_8K
	bool "8k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_16K
	bool "16k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_32K
	bool "32k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_64K
	bool "64k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
	bool "128k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_256K
	bool "256k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_512K
	bool "512k"

config BR2_TARGET_ROOTFS_SQUASHFS_BS_1024K
	bool "1024k"

endchoice

config BR2_TARGET_ROOTFS_SQUASHFS_BS
	string
	default "4K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_4K
	default "8K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_8K
	default "16K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_16K
	default "32K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_32K
	default "64K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_64K
	default "128K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
	default "256K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_256K
	default "512K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_512K
	default "1024K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_1024K

config BR2_TARGET_ROOTFS_SQUASHFS_PAD
	bool "pad to a 4K boundary"
	default y # legacy was always ON
	help
	  Say 'y' here (the default) to pad the the filesystem image
	  to a 4K boundary. Say 'n' to disable padding.

choice
	prompt "Compression algorithm"
	default BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
	help
	  Select the squashfs compression algorithm to use when
	  generating the filesystem.

config BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
	bool "gzip"

config BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
	bool "lz4"

config BR2_TARGET_ROOTFS_SQUASHFS4_LZMA
	bool "lzma"

config BR2_TARGET_ROOTFS_SQUASHFS4_LZO
	bool "lzo"

config BR2_TARGET_ROOTFS_SQUASHFS4_XZ
	bool "xz"

config BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
	bool "zstd"

endchoice

config BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP
	bool "extreme compression when available"
	default y if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4  # legacy
	help
	  Use options to increase compression ration as much as
	  possible, like using architecture-specific options, at
	  the cost of time when assembling the filesystem image.

	  For example:
	   - with gzip and lzo, use -Xcompression-level 9
	   - with xz use arch-specific bcj (branch-call-jump) filters
	   - with zstd use -Xcompression-level 22
	   - and more

config BR2_TARGET_ROOTFS_SQUASHFS_COMP_OPTS
	string
	default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
	default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_LZO
	default "-Xhc" if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
	default "-Xbcj arm,armthumb" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_arm || BR_aarch64)
	default "-Xbcj powerpc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_powerpc || BR2_powerpc64)
	default "-Xbcj sparc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_sparc || BR2_sparc64)
	default "-Xbcj x86" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_i386 || BR2_x86_64)
	default "-Xcompression-level 22" if BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
	depends on BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP

endif