how to test lapack

[Matyas]

Hi All,

In order to test reimplementations of some lapack functions,
it would be very helpful if I could easily replace lapack
used by octave.  (Since I have an algorithm using said
lapack functions with testing/timing already written as
M-files.)

I tried specifying the lapack.so file with --with-lapack
during configure but the resulting octave still appears to
get lapack from somewhere else (that is my changes to lapack
do not take effect).

If there are any other suggestions on how to go about this,
I will be glad to listen.

I tried one more thing: to use the mex command to compile
my function written in fortran.  The mex command did not
produce an error, but execution complained that it could
not load it.

Thanks!
Matyas