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- 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
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