This is actually a library dependency on glibc.
The linux libraries were compiled under a newer version of Ubuntu.
You can compile the WFDB Software package (library/applications) using the instructions described in:
http://physionet.org/physiotools/wfdb-linux-quick-start.shtmlOnce the compilation is successful, you can change the MATLAB Toolbox configuration to point to the system wide installation of WFDB, create a symlink to
{wfdb-app-toolbox}/mcode/nativelibs/custom/, and modify the WFDBLOADLIB file:
http://physionet.org/physiotools/matlab/wfdb-app-matlab/html/wfdbloadlib.mBy changing its WFDB_CUSTOMLIB to 1.
Alternatively, you can just overwrite all the binaries and library files in {wfdb-app-toolbox}/mcode/nativelibs/linux/ ) with the ones that you have build for your system.
-Ikaro