1d5b36bfa4
Devices with large amounts of flash but operating in connectivity- constrained areas can benefit from using uncompressed images as this allows delta updates using binary diff algorithms. Connectivity-constrained areas in this context are defined as areas where the connection is very slow, unstable, etcetera, where it is difficult to transfer data in large scale. Add a "none" option to the compression menu and map it to the mksquashfs -no-compression flag to enable this feature. Disable the ability to select extreme compression in this case as that makes absolutely no sense combined with no compression. Signed-off-by: John Ernberg <john.ernberg@actia.se> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
40 lines
1.2 KiB
Makefile
40 lines
1.2 KiB
Makefile
################################################################################
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#
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# Build the squashfs root filesystem image
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#
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################################################################################
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ROOTFS_SQUASHFS_DEPENDENCIES = host-squashfs
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ROOTFS_SQUASHFS_ARGS = \
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-noappend \
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-processors $(PARALLEL_JOBS) \
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-b $(call qstrip,$(BR2_TARGET_ROOTFS_SQUASHFS_BS)) \
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$(call qstrip,$(BR2_TARGET_ROOTFS_SQUASHFS_COMP_OPTS))
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ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS_PAD),)
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ROOTFS_SQUASHFS_ARGS += -nopad
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endif
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ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZ4),y)
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ROOTFS_SQUASHFS_ARGS += -comp lz4
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else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZO),y)
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ROOTFS_SQUASHFS_ARGS += -comp lzo
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else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZMA),y)
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ROOTFS_SQUASHFS_ARGS += -comp lzma
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else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_XZ),y)
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ROOTFS_SQUASHFS_ARGS += -comp xz
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else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD),y)
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ROOTFS_SQUASHFS_ARGS += -comp zstd
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else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_NONE),y)
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ROOTFS_SQUASHFS_ARGS += -no-compression
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else
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ROOTFS_SQUASHFS_ARGS += -comp gzip
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endif
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define ROOTFS_SQUASHFS_CMD
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$(HOST_DIR)/bin/mksquashfs $(TARGET_DIR) $@ $(ROOTFS_SQUASHFS_ARGS)
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endef
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$(eval $(rootfs))
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