Dear all: I downloaded the Octave 2.9.12 source and ran the 'configure' shell script only to find some libraries concerning sparse matrices (UMFPACK, CHOLMOD, etc.) were missing. So I googled their names, obtained their codes and compiled them. Now the library files are at hand but I'v no idea how can I let Octave find them and link with them?? I've tried many times but no progress was made. Without those libraries Octave misfunctions on some of my program!