ARPACK is a collection of Fortran77 subroutines designed to solve large scale eigenvalue problems.
On the HPC we have versions for all the compilers that we support: gnu,intel and pgi. To use the arpack library, you have to compile your source like,
g77 -o myprogram myprogram.f -L/opt/arpack/gnu -larpack
ifort -o myprogram myprogram.f -L/opt/arpack/intel -larpack
pg77 -o myprogram myprogram.f -L/opt/arpack/pgi -larpack
For more information on arpack, see the ARPACK home page.