[petsc-dev] I am getting this error ...

Barry Smith bsmith at petsc.dev
Thu Nov 4 14:07:31 CDT 2021

  You have to pass in the flag to turn off the bitching about -gpu to the C preprocessor, not the C compiler.

nvc-Warning-The -gpu option has no effect unless a language-specific option to enable GPU code generation is used (e.g.: -acc, -mp=gpu, -stdpar, -cuda)
#include "confdefs.h"
#include "conffix.h"
#include <stdlib.h>

> On Nov 4, 2021, at 2:49 PM, Mark Adams <mfadams at lbl.gov> wrote:
> on Perlmutter with nvhpc:
>               Defined make macro "CPP" to "cc --use cpp32"
> Preprocessing source:
> #include "confdefs.h"
> #include "conffix.h"
> #include <stdlib.h>
> Executing: cc --use cpp32  -I/tmp/petsc-jV9U1b/config.setCompilers  /tmp/petsc-jV9U1b/config.setCompilers/conftest.c
> Possible ERROR while running preprocessor: exit code 1
> stderr:
> nvc-Error-Unknown switch: --use
> Source:
> <configure.log>

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