fusecompress on knoppix-data.img?

[dinosoep]

this is my make output:

cc -I./libau -O -Wall    c2tmac.c   -o c2tmac
rm -f aufs.5
./c2tmac > aufs.5
awk '{ \
		gsub(/\140[^\047]*\047/, "\\[oq]&\\[cq]"); \
		gsub(/\\\[oq\]\140/, "\\[oq]"); \
		gsub(/\047\\\[cq\]/, "\\[cq]"); \
		gsub(/\047/, "\\[aq]"); \
		print; \
	}' aufs.in.5 >> aufs.5
chmod a-w aufs.5
cc -I./libau -O -Wall   -c -o proc_mnt.o proc_mnt.c
ar rv libautil.a proc_mnt.o
ar: creating libautil.a
a - proc_mnt.o
cc -I./libau -O -Wall   -c -o br.o br.c
ar rv libautil.a br.o
a - br.o
cc -I./libau -O -Wall   -c -o plink.o plink.c
ar rv libautil.a plink.o
a - plink.o
cc -I./libau -O -Wall   -c -o mtab.o mtab.c
ar rv libautil.a mtab.o
a - mtab.o
cc -I./libau -O -Wall   -c -o auplink.o auplink.c
cc -static -s  auplink.o  -L. -lautil -o auplink
cc -I./libau -O -Wall   -c -o mount.aufs.o mount.aufs.c
cc -static -s  mount.aufs.o  -L. -lautil -o mount.aufs
cc -I./libau -O -Wall    c2sh.c   -o c2sh
rm -f etc_default_aufs
echo '# aufs variables for shell scripts' > etc_default_aufs
./c2sh >> etc_default_aufs
echo >> etc_default_aufs
sed -e '0,/^$/d' aufs.shlib >> etc_default_aufs
make -C libau all
make[1]: Entering directory `/home/knoppix/aufs2.1-tools/libau'
cc -I./libau -O -Wall -fPIC -DNDEBUG -D_REENTRANT -I.   -c -o libau.o libau.c
cc -I./libau -O -Wall -fPIC -DNDEBUG -D_REENTRANT -I.   -c -o rdu_lib.o rdu_lib.c
cc -I./libau -O -Wall -fPIC -DNDEBUG -D_REENTRANT -I.   -c -o rdu.o rdu.c
ln -sf rdu.c rdu64.c
cc -I./libau -O -Wall -DRdu64 -fPIC -DNDEBUG -D_REENTRANT -I.   -c -o rdu64.o rdu64.c
cc -I./libau -O -Wall -fPIC -DNDEBUG -D_REENTRANT -I.   -c -o pathconf.o pathconf.c
cc --shared -Wl,-soname,libau.so.2  \
		-o libau.so.2.3 libau.o rdu_lib.o rdu.o rdu64.o pathconf.o -ldl -lpthread
ln -sf libau.so.2.3 libau.so.2
ln -sf libau.so.2 libau.so
make[1]: Leaving directory `/home/knoppix/aufs2.1-tools/libau'
ln -sf ./libau/libau*.so .
rm c2tmac c2sh

as you can see, no errors at all.
only mount.aufs gets made, umount.aufs doesn't...