[petsc-users] Build error: vecimpl.h:124:98: error: expected declaration specifiers or '...' before string constant

[Zongze Yang]

No, it doesn't. It has the same problem. I just `make clean` and the
`make`. Do I need to reconfigure?

Best wishes,
Zongze


On Tue, 18 Apr 2023 at 21:09, Satish Balay <balay at mcs.anl.gov> wrote:

> Does this change work?
>
> diff --git a/include/petsc/private/vecimpl.h
> b/include/petsc/private/vecimpl.h
> index dd75dbbc00b..168540b546e 100644
> --- a/include/petsc/private/vecimpl.h
> +++ b/include/petsc/private/vecimpl.h
> @@ -110,7 +110,7 @@ struct _VecOps {
>    PetscErrorCode (*setvaluescoo)(Vec, const PetscScalar[], InsertMode);
>  };
>
> -#if defined(offsetof) && (defined(__cplusplus) || (PETSC_C_VERSION >= 11))
> +#if defined(offsetof) && (defined(__cplusplus) || (PETSC_C_VERSION >= 17))
>    #if (PETSC_C_VERSION >= 11) && (PETSC_C_VERSION < 23)
>      // static_assert() is a keyword since C23, before that defined as
> macro in assert.h
>      #include <assert.h>
>
>
> Satish
>
> On Tue, 18 Apr 2023, Zongze Yang wrote:
>
> > Hi, I am building petsc using gcc at 9.5.0, and found the following error:
> >
> > ```
> > In file included from /usr/include/alloca.h:25,
> >                  from /usr/include/stdlib.h:497,
> >                  from
> > /home/lrtfm/opt/firedrake/complex-int32/petsc/include/petscsys.h:1395,
> >                  from
> > /home/lrtfm/opt/firedrake/complex-int32/petsc/include/petscsf.h:7,
> >                  from
> >
> /home/lrtfm/opt/firedrake/complex-int32/petsc/src/vec/is/sf/interface/vscat.c:1:
> >
> /home/lrtfm/opt/firedrake/complex-int32/petsc/include/petsc/private/vecimpl.h:124:15:
> > error: expected declaration specifiers or '...' before
> '__builtin_offsetof'
> >   124 | static_assert(offsetof(struct _VecOps, loadnative) == sizeof(void
> > (*)(void)) * VECOP_LOADNATIVE, "");
> >       |               ^~~~~~~~
> > In file included from
> >
> /home/lrtfm/opt/firedrake/complex-int32/petsc/src/vec/is/sf/interface/vscat.c:7:
> >
> /home/lrtfm/opt/firedrake/complex-int32/petsc/include/petsc/private/vecimpl.h:124:98:
> > error: expected declaration specifiers or '...' before string constant
> >   124 | static_assert(offsetof(struct _VecOps, loadnative) == sizeof(void
> > (*)(void)) * VECOP_LOADNATIVE, "");
> >       |
> >                              ^~
> > ```
> >
> > Could someone give me some hints to fix it? The configure.log and
> make.log
> > are attached.
> >
> >
> > Best wishes,
> > Zongze
> >
>
>
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