[petsc-users] Could not find a CXX preprocessor on Catalina

[Balay, Satish]

Yes - this is a link time option - and somehow your build of mpich is
using at compile/preprocess time.

You can try rebuilding this mpich - or use --download-mpich with petsc configure

Satish

On Wed, 4 Dec 2019, Alexander Lindsay wrote:

> Is this regarded as failing just because of the unused option warning? The
> `mpicxx` wrapper specifies `-Wl,-flat_namespace` which is indeed going to
> be unused during preprocessing...
> 
> On Wed, Dec 4, 2019 at 11:40 AM Alexander Lindsay <alexlindsay239 at gmail.com>
> wrote:
> 
> > I'm currently unable to build superlu_dist during configuration because of
> > "Could not find a CXX preprocessor". From configure.log it looks like CXXPP
> > is getting deleted after errors executing `mpicxx -E` and then `mpicxx
> > --use cpp32`. Attached is configure.log.
> >
>