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...

[kl522]

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

Then it is obvious your version of source code is faulty.

If you check careful, my source compilation also compiles another program called 'ver'. This is a program which verifies version matching. If there is a version mismatch, compilation of 'ver' will not pass.