[petsc-users] Trouble configuring PETSc with serial MUMPS (no MPI)

[Satish Balay]

you need the additional option -with-mumps-serial=1

For example - check config/examples/arch-ci-linux-cuda-uni-pkgs.py

Satish

On Fri, 11 Apr 2025, salvador wrote:

> Dear PETSc team,
> 
> I'm trying to compile PETSc with *MUMPS* in *serial mode* (without MPI), and
> I’ve encountered an issue during the |./configure| step.
> 
> Here is the command I'm using:
> 
> ./configure \
>   --with-cc=gcc \
>   --with-cxx=g++ \
>   --with-fc=gfortran \
>   --with-mpi=0 \
>   --with-scalar-type=complex \
>   --with-petsc-arch=arch-linus-c-opt-complex \
>   --with-blaslapack=1 \
>   --with-mumps=1 \
>   --with-scalapack=0
> 
> However, I get the following error:
> 
> *********************************************************************************************
>            UNABLE to CONFIGURE with GIVEN OPTIONS (see configure.log for
> details):
> ---------------------------------------------------------------------------------------------
>   Package mumps requested but dependency scalapack not requested.
>   Perhaps you want --download-scalapack or 
> --with-scalapack-dir=directory or
>   --with-scalapack-lib=libraries and --with-scalapack-include=directory
> *********************************************************************************************
> 
> My understanding is that *MUMPS can be used in serial* (according to its
> documentation), but PETSc seems to expect *ScaLAPACK* as a dependency even
> without MPI.
> 
>  *
> 
>    Is it possible to use MUMPS in PETSc *without MPI and without
>    ScaLAPACK*?
> 
>  *
> 
>    If not, is there a way to enable serial MUMPS with PETSc?
> 
> Any guidance would be appreciated.
> 
> Best regards,
> /Salvador
> /
> 
>