PiCore 13.x Tree 2.1.0 extension:

Downloaded source from:
ftp://mama.indstate.edu/linux/tree/tree-2.1.0.tgz

* Install extensions:  compiletc squashfs-tools
* export CFLAGS="-march=armv6 -mfpu=vfp -mfloat-abi=hard -Os -pipe"

* sed -i -e 's/-O3//' -e 's/PREFIX=.*/PREFIX=\/tmp\/tree\/usr\/local/' Makefile

* make

* sudo make install
* split /tmp/tree into directories:  tree tree-doc

* sudo chown -R root:root tree*
* In each dir. run "find usr ! -type d | sed "s/^/\//g" > ../tree.tcz.list".
 - for dir in `find -maxdepth 1 -mindepth 1 -type d`; do cd $dir; find usr ! -type d | sed "s/^/\//g" > ../$dir.tcz.list; cd ..; done
* Make into extensions using mksquashfs. "mksquashfs tree tree.tcz
  "md5sum tree.tcz > tree.tcz.md5.txt" etc...
 - for dir in `find -maxdepth 1 -mindepth 1 -type d`; do mksquashfs $dir ${dir#./}.tcz; md5sum ${dir#./}.tcz > ${dir#./}.tcz.md5.txt; done

    No dependencies