[petsc-users] build pets with 64 bit indices

[hexioafeng]

Dear PETSc developers,

I use PETSc and SLEPC to solve generalized eigen problems. When solving an interval eigen problem with matrix size about 5 million,  i got the error message: "product of two integer xx xx overflow, you must ./configure PETSc with --with-64-bit-indices for the case you are running".

I use some prebuilt third-party packages when building PETSc, namely OpenBLAS, METIS, ParMETIS and SCALAPACK. I wonder should i also use 64-bit prebuilt packages when configure PETSc with the --with-64-bit-indices flag? How about the MUMPS and MPI? Do i have to also use the b4-bit version?

Look forward for your reply, thanks.

Xiaofeng
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