<div dir="ltr">I can't claim to speak for Jose, but I had asked him this same question about a year ago, and IIRC he had said that the default algorithm in SlepC (KrylovSchur) is equivalent or better then Arpack.<div><br>
</div><div>Looking through my email this is what I did to get arpack working (I never used it because I switched to KrylovSchur). Can't guarantee it will work for you - </div><div><br></div><div><p class="">> I was able to install ARPACK & link it with
SLEPC on FC15 using gcc/g++/gfortran The
issues were -</p><p class=""></p>
<p class="">> 1) I needed
to change a function declaration in Arpack. This was holding up the
linking. The function was etime in
second.f</p>
<p class="">> 2) I need to
compile ARPACK with -fno-underscoring to make sure that the C code (SlepC)
links with the Fortran code</p>
<p class="">> 3) I needed
to compile additional object files by doing make all in the LAPACK/BLAS
directory that came with ARPACK to make sure that the examples ran.</p>
<p class="">> 4) To link it
with SlepC I needed to create position independent code using the -fPIC flag on
the compiler</p>
<p class="">> 5) I needed
to install PETSC and SlepC with OpenMPI to be able to use Parpack. I needed to set the LD_LIBRARY_PATH to the
directory where the openmpi compilers were located so that SlepC could find
them.</p>
<p class="">> </p>
<p class=""><br></p><div style>-Nachiket</div></div></div>