[petsc-dev] MUMPS and 64 bit indices

[Sean Farley]

Barry Smith writes:

>> On Dec 15, 2014, at 3:16 PM, Garth N. Wells <gnw20 at cam.ac.uk> wrote:
>> 
>> It's possible to configure PETSc with the options
>> 
>>   --with-64-bit-indices --download-mumps
>> 
>> and compile and run, but it doesn't look like the MUMPS interface supports 64 bit indices. Should the above combination throw an error at configure time?
>
>   Yes, there is commented code in the consistency check, I cannot remember why it was commented.
>
> #      if self.double and not self.scalartypes.precision.lower() == 'double':
> #        raise RuntimeError('Cannot use '+self.name+' withOUT double precision numbers, it is not coded for this capability')
> #      if not self.complex and self.scalartypes.scalartype.lower() == 'complex':
> #        raise RuntimeError('Cannot use '+self.name+' with complex numbers it is not coded for this capability')
> #      if self.libraryOptions.integerSize == 64 and self.requires32bitint:
> #        raise RuntimeError('Cannot use '+self.name+' with 64 bit integers, it is not coded for this capability')

I think that's from when I added patches to suitesparse, mumps, and
superlu for working with 64-bit ints. I wouldn't be surprised if
something wasn't working. I believe, to date, only Sherry has
incorporated my patches. That will learn me to try to contribute patches
to academics.