tce-load -i compiletc liblzma-dev lzo-dev zstd-dev liblz4-dev

wget https://github.com/plougher/squashfs-tools/archive/refs/tags/4.6.1.tar.gz

cd squashfs-tools-4.6.1

patch -Np2 -i ../squashfs-tools_block_size.patch

cd squashfs-tools

Edit Makefile
XZ_SUPPORT = 1
LZO_SUPPORT = 1
LZ4_SUPPORT = 1
ZSTD_SUPPORT = 1
#XATTR_SUPPORT = 1
CFLAGS ?=

make CC="gcc -flto -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" CXX="g++ -flto -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -fno-exceptions -fno-rtti" [0m 40.20s]

sudo make CC="gcc -flto -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" CXX="g++ -flto -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -fno-exceptions -fno-rtti" install