119 lines
3.2 KiB
Plaintext
119 lines
3.2 KiB
Plaintext
config BR2_TARGET_ROOTFS_SQUASHFS
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bool "squashfs root filesystem"
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help
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Build a squashfs root filesystem
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if BR2_TARGET_ROOTFS_SQUASHFS
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choice
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prompt "block size"
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default BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
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help
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Data block size. Bigger values can improve
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compression ratio.
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If unsure, leave at 128k (default).
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_4K
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bool "4k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_8K
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bool "8k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_16K
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bool "16k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_32K
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bool "32k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_64K
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bool "64k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
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bool "128k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_256K
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bool "256k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_512K
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bool "512k"
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config BR2_TARGET_ROOTFS_SQUASHFS_BS_1024K
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bool "1024k"
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endchoice
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config BR2_TARGET_ROOTFS_SQUASHFS_BS
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string
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default "4K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_4K
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default "8K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_8K
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default "16K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_16K
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default "32K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_32K
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default "64K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_64K
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default "128K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_128K
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default "256K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_256K
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default "512K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_512K
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default "1024K" if BR2_TARGET_ROOTFS_SQUASHFS_BS_1024K
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config BR2_TARGET_ROOTFS_SQUASHFS_PAD
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bool "pad to a 4K boundary"
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default y # legacy was always ON
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help
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Say 'y' here (the default) to pad the the filesystem image
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to a 4K boundary. Say 'n' to disable padding.
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choice
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prompt "Compression algorithm"
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default BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
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help
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Select the squashfs compression algorithm to use when
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generating the filesystem.
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config BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
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bool "gzip"
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config BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
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bool "lz4"
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config BR2_TARGET_ROOTFS_SQUASHFS4_LZMA
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bool "lzma"
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config BR2_TARGET_ROOTFS_SQUASHFS4_LZO
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bool "lzo"
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config BR2_TARGET_ROOTFS_SQUASHFS4_XZ
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bool "xz"
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config BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
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bool "zstd"
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endchoice
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config BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP
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bool "extreme compression when available"
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default y if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4 # legacy
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help
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Use options to increase compression ration as much as
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possible, like using architecture-specific options, at
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the cost of time when assembling the filesystem image.
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For example:
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- with gzip and lzo, use -Xcompression-level 9
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- with xz use arch-specific bcj (branch-call-jump) filters
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- with zstd use -Xcompression-level 22
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- and more
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config BR2_TARGET_ROOTFS_SQUASHFS_COMP_OPTS
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string
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default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
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default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_LZO
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default "-Xhc" if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
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default "-Xbcj arm,armthumb" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_arm || BR_aarch64)
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default "-Xbcj powerpc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_powerpc || BR2_powerpc64)
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default "-Xbcj sparc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_sparc || BR2_sparc64)
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default "-Xbcj x86" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_i386 || BR2_x86_64)
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default "-Xcompression-level 22" if BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
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depends on BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP
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endif
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