[petsc-users] Strange compiling error in DMPlexDistribute after updating PETSc to V3.11.0

[Balay, Satish]

A complete simple code showing this error would be useful.

wrt 'Error: Non-variable expression in variable definition context' google gives:

https://www.queryxchange.com/q/27_45961166/non-variable-expression-in-variable-definition-context-compilation-error/

But I don't see an expression in the code snippet here..

There must be some difference between your usage of this function vs the petsc example..

Satish

On Fri, 5 Apr 2019, Danyang Su via petsc-users wrote:

> Hi Satish,
> 
> Because of the intent(out) declaration, I use a temporary solution that
> passing a PetscSF type variable to DMPlexDistribute instead of passing
> PETSC_NULL_SF. But I am still confused how the example works without problem.
> 
> Thanks,
> 
> Danyang
> 
> On 2019-04-05 2:00 p.m., Balay, Satish wrote:
> > Ah - the message about distributed_dm - not PETSC_NULL_SF. So I'm off base
> > here..
> >
> > Satish
> >
> >
> > On Fri, 5 Apr 2019, Balay, Satish via petsc-users wrote:
> >
> >> A fortran interface definition was added in petsc-3.11 so the compile now
> >> checks if its used correctly.
> >>
> >> http://bitbucket.org/petsc/petsc/commits/fdb49207a8b58c421782c7e45b1394c0a6567048
> >>
> >> +          PetscSF, intent(out) :: sf
> >>
> >> So this should be inout?
> >>
> >> [All auto-generated stubs don't quantify intent()]
> >>
> >> Satish
> >>
> >> On Fri, 5 Apr 2019, Danyang Su via petsc-users wrote:
> >>
> >>> Hi All,
> >>>
> >>> I got a strange error in calling DMPlexDistribute after updating PETSc to
> >>> V3.11.0. There sounds no change in the interface of DMPlexDistribute as
> >>> documented in
> >>>
> >>> https://www.mcs.anl.gov/petsc/petsc-3.10/docs/manualpages/DMPLEX/DMPlexDistribute.html#DMPlexDistribute
> >>>
> >>> https://www.mcs.anl.gov/petsc/petsc-3.11/docs/manualpages/DMPLEX/DMPlexDistribute.html#DMPlexDistribute
> >>>
> >>> The code section is shown below.
> >>>
> >>>        !c distribute mesh over processes
> >>>        call
> >>> DMPlexDistribute(dm,stencil_width,PETSC_NULL_SF,distributed_dm,ierr)
> >>>
> >>> When I use PETSc V3.10 and earlier versions, it works fine. After updating
> >>> to
> >>> latest PETSc V3.11.0, I got the following error during compiling
> >>>
> >>>       call
> >>> DMPlexDistribute(dm,stencil_width,PETSC_NULL_SF,distributed_dm,ierr)
> >>>                                                                      1
> >>> Error: Non-variable expression in variable definition context (actual
> >>> argument
> >>> to INTENT = OUT/INOUT) at (1)
> >>> /home/dsu/Soft/PETSc/petsc-3.11.0/linux-gnu-opt/lib/petsc/conf/petscrules:31:
> >>> recipe for target '../../solver/solver_ddmethod.o' failed
> >>>
> >>> The fortran example
> >>> /home/dsu/Soft/PETSc/petsc-3.11.0/src/dm/label/examples/tutorials/ex1f90.F90
> >>> which also uses DMPlexDistribute can be compiled without problem. Is there
> >>> any
> >>> updates in the compiler flags I need to change?
> >>>
> >>> Thanks,
> >>>
> >>> Danyang
> >>>
> >>>
> >>>
>