[petsc-users] Configure error with PETSc 3.17.4 on Ubuntu 22.04

[David Knezevic]

Regarding 1.: We're using --download-mumps, so this is the mumps that was
installed during config. There was no mumps build prior to that. Does that
change anything?

Regarding 2.: We need --with-clanguage=cxx since we're also using an
external C++ library (libMesh). We've been using --with-clanguage=cxx in
PETSc with libMesh for years...



On Fri, Aug 12, 2022 at 1:24 PM Matthew Knepley <knepley at gmail.com> wrote:

> On Fri, Aug 12, 2022 at 1:14 PM David Knezevic via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
>> I get a configure error when building PETSc 3.17.4 on Ubuntu 22.04. The
>> configure.log is attached.
>>
>> This error seems to only occur when we use --with-clanguage=cxx. We need
>> to use that object when building with complex numbers.
>>
>> Guidance on how to resolve this would be most appreciated.
>>
>
> 1. I think your existing MUMPS build is incompatible (but it is hard for
> us to tell). Remove it
>
>   rm -rf $PETSC_DIR/$PETSC_ARCH/externalpackages/git.mumps
>
> and reconfigure
>
> 2. You can also use C99 for complex numbers, but your application code
> might already be using C++.
>
>   Thanks,
>
>      Matt
>
>
>> Thanks,
>> David
>>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
> https://www.cse.buffalo.edu/~knepley/
> <http://www.cse.buffalo.edu/~knepley/>
>
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