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image.mk: use XZ bcj architecture filter if available

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xz supports using an architecture specific BCJ filter, use that one to
save us a couple kB while producing squashfs filesystems (mimics the
Linux kernel).

Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 35097
This commit is contained in:
Florian Fainelli 2013-01-11 16:44:26 +00:00
parent 27828be83a
commit ce5dd3b9e2
1 changed files with 4 additions and 1 deletions
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5
include/image.mk
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@ -50,7 +50,10 @@ ifeq ($(CONFIG_SQUASHFS_LZMA),y)
SQUASHFSCOMP := lzma $(LZMA_XZ_OPTIONS)
endif
ifeq ($(CONFIG_SQUASHFS_XZ),y)
SQUASHFSCOMP := xz $(LZMA_XZ_OPTIONS)
ifneq ($(filter arm x86 powerpc sparc,$(LINUX_KARCH)),)
BCJ_FILTER:=-Xbcj $(LINUX_KARCH)
endif
SQUASHFSCOMP := xz $(LZMA_XZ_OPTIONS) $(BCJ_FILTER)
endif
JFFS2_BLOCKSIZE ?= 64k 128k