I want to install the GNU Octave optim package, but I keep receiving errors in the process. Apparently I need to install some other packages first, one of which is the general package. However, when I try to, I receive this error: octave:17> pkg install general-1.3.2.tar.gz make: /usr/bin/mkoctfile: Command not found make: *** [__exit__.oct] Error 127 'make' returned the following error: make: Entering directory `/tmp/oct-CGIPo9/general/src' /usr/bin/mkoctfile __exit__.cc make: Leaving directory `/tmp/oct-CGIPo9/general/src' error: called from `pkg>configure_make' in file /usr/share/octave/3.6.1/m/pkg/pkg.m near line 1391, column 9 error: called from: error: /usr/share/octave/3.6.1/m/pkg/pkg.m at line 834, column 5 error: /usr/share/octave/3.6.1/m/pkg/pkg.m at line 383, column 9