The ScaLAPACK (Scalable LAPACK) is a linear algebra library for parallel computers. Routines are available to solve the linear system A*x=b, or to find the matrix eigensystem, for a variety of matrix types.
Example command
pgf77 source_file.f -Mscalapack
The -Mscalapack optiuon causes the following libraries, all of which are installed in /usr/common/pgi/linux86/5.2/lib, to be linked in to your executable: