安裝squashfs-lzma
LZMA is one of the best compression algorithms and Squashfs is one of the best compressed filesystems available nowadays. This project combined both to make something even better.
LZMA can compress much better then gzip, which was the only option in squashfs for years. Compressing to LZMA format is very slow, but this is not a problem as the squashfs filesystem needs to be compressed only once. Then it's only read million times; so what we care about is the speed of decompression. LZMA decompression is slower than gzip, but it's even very fast, about 10-20 MB/s on a 2GHz CPU.
解壓後直接make，但是安裝的時候碰到一個問題
-
/usr/bin/ld: mksquashfs.o: undefined reference to symbol 'log10@@GLIBC_2.0' -
/usr/bin/ld: note: 'log10@@GLIBC_2.0' is defined in DSO /lib/libm.so.6 so try andding it to the linker command line -
/lib/libm.so.6: could not read symbols: Invalid operation
這是由於編譯的時候沒有鏈接math庫。
追蹤溯源，找到了“squashfs3.2-r2/squashfs-tools”目錄下Makefile文件，在
mksquashfs: LDLIBS += -lpthread -lunlzma_r -llzma_r -lstdc++
後面加上 -lm
然後編譯，就通過了