[petsc-users] 64 bit integers

Jed Brown jedbrown at mcs.anl.gov
Fri Aug 17 09:43:11 CDT 2012

On Fri, Aug 17, 2012 at 9:40 AM, Michele Rosso <mrosso at uci.edu> wrote:

> I want to build my application with 64 bit integer support
> because of the size of the problem I am working on.
> I compiled petsc with the option  *--with-64-bit-indices=1*.
> In my Fortran code some petsc vectors are initialize by taking
> values from Fortran arrays.
> I used PetscInt indexes to reference both petsc and fortran vectors.
> It used to work with 32 bit indexes.
> Will it still be the case for the 64 bit case?

As long as you use PetscInt for every integer that you pass to and from
PETSc, it will work automatically.
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