[petsc-dev] forget about libmpiuni completely

Barry Smith bsmith at mcs.anl.gov
Wed Feb 17 16:54:57 CST 2010

    We want both the transparency and simplicity to the user PLUS a  
common way of handling things in PETSc to reduce the learning curve of  
PETSc developers and PETSc maintenance.

     Each "special case" in PETSc is a flaw in our design, and an  
admission we made a mistake or didn't really know how to do things.  
Currently the MPIuni stuff is a bit of special case.


On Feb 17, 2010, at 4:48 PM, Matthew Knepley wrote:

> On Wed, Feb 17, 2010 at 2:44 PM, Lisandro Dalcin <dalcinl at gmail.com>  
> wrote:
> On 17 February 2010 12:00, Matthew Knepley <knepley at gmail.com> wrote:
> > I am for a separate mpiuni that get downloaded. I think this makes  
> more
> > sense with
> > our other packages concepts, and is more modular. We can reuse so  
> much more
> > of
> > configure as well.
> I still fail to see the pros of having a separate mpiuni.
> I think you have to put on user's side when taking a decision about
> this. Are FINAL USERS going to have any benefits for having mpiuni as
> a separate download and having to pass a separate library in when
> invoking the  linker? If a user wants no-MPI, Is there any other
> They do not pass anything. The beauty of the Petsc build.
> fake-mpi alternative supported in PETSc? If the answer is no, so then
> why bother people with a separate download?
> They do not even have to download it. They specify the same option  
> as before.
> From a user perspective, it does not change. From a Petsc and  
> library developer,
> it is better.
>     Matt
> --
> Lisandro Dalcin
> ---------------
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