cannot find -lvl

[seipak]

when I "$make " under the path "../DaLI/octave/ "
the make error comes like,
"
CFLAGS="-g -DHAVE_PTHREADS=0" mkoctfile --mex -g -I.. -lm -lceigs -larpack -lcxsparse -lumfpack -lfftw3 -lvl dali_compute.c ../dali.c ../dali_mesh.c
/usr/bin/ld: cannot find -lvl
collect2: error: ld returned 1 exit status
Makefile:22: recipe for target 'dali_compute.mex' failed
make: *** [dali_compute.mex] Error 1
"
Could please tell me what the lvl package is ?
Because I could google any information about -lvl.

[cool-demo]

So do I.
/usr/bin/ld: cannot find -lvl
What is lvl?