[petsc-users] --with-mpi=0

[Satish Balay]

Also we have:

include/petscsys.h:#  include <petsc/mpiuni/mpi.h>
src/sys/mpiuni/f90-mod/mpiunimod.F90:#include <petsc/mpiuni/mpif.h>

And avoid -Iprefix/include/petsc/mpiuni/

So I'm not sure if adding this in can cause grief (as it would be required for mpi.mod at this location).

I have changes for mpiuni.mod -> mpi.mod at:

https://gitlab.com/petsc/petsc/-/merge_requests/4662

[they are a bit hakey]

Satish



On Sat, 18 Dec 2021, Satish Balay via petsc-users wrote:

> On Sat, 18 Dec 2021, Barry Smith wrote:
> 
> > 
> >   It seems like this might be a good strategy, presumably the directory is already made to hold mpi.h for MPI uni
> > 
> > >  Perhaps its possible to change our installer to have mpiuni's mod file at  prefix/include/petsc/mpiuni/mpi.mod - [to enable reusing mpi.mod name ]
> 
> >>>
>         module petscmpi
> #include <petscconf.h>
> #include "petsc/finclude/petscsys.h"
> #if defined(PETSC_HAVE_MPIUNI)
>         use mpiuni
> #else
> #if defined(PETSC_HAVE_MPI_F90MODULE)
>         use mpi
> #else
> #include "mpif.h"
> #endif
> #endif
> <<<
> 
> There is also this use-case where there is no usable mpi.mod  - that petscmpi is currently
> handling... Not sure how to deal with that..
> 
> Satish
>