[petsc-dev] Problem with the reorganization of complex with clang

[Matthew Knepley]

I am going to try just including petscsys.h and see if it works.

  Thanks,

     Matt

On Thu, May 13, 2021 at 6:23 PM Satish Balay <balay at mcs.anl.gov> wrote:

> This gets the build going...
>
> diff --git a/src/sys/dll/cxx/demangle.cxx b/src/sys/dll/cxx/demangle.cxx
> index 31810ea15f..793a97d285 100644
> --- a/src/sys/dll/cxx/demangle.cxx
> +++ b/src/sys/dll/cxx/demangle.cxx
> @@ -1,3 +1,4 @@
> +#define PETSC_SKIP_COMPLEX
>  #include <petsc/private/petscimpl.h>
>
>  #ifdef PETSC_HAVE_CXXABI_H
>
> Satish
>
> On Thu, 13 May 2021, Satish Balay wrote:
>
> > >         CXX arch-ci-linux-clang-avx/obj/sys/dll/cxx/demangle.o
> >
> > It is built with a c++ compiler - so __cplusplus should be defined.
> [PETSC_HAVE_CXXABI is not defined]
> >
> > Do you need to build this sourcefile file in a clanguage=C build?
> >
> > I'm not sure if a c++/complex build  is checked with this compiler.
> >
> > [eventhough its clang build - I see the compiler is using system
> incldues aka from gcc-4.8.5 - so perhaps some things don't work?]
> >
> > One option is to add the following to this sourcefile:
> >
> > #define PETSC_SKIP_COMPLEX
> >
> > Satish
> >
> >
> > On Thu, 13 May 2021, Matthew Knepley wrote:
> >
> > > In this CI run (linux-clang-avg):
> > >
> > >   https://gitlab.com/petsc/petsc/-/jobs/1260342204
> > >
> > > The compile fails building a C++ file, demangle.cxx. It fails at the
> first
> > > line,
> > > including <petsc/private/petscimpl.h>, down in petscsystypes.h. It
> bombs
> > > during the definition of complex because it looks like the compiler is
> not
> > > defining __cplusplus, and thus takes the wrong branch. Is this what is
> > > happening?
> > > I cannot access this machine.
> > >
> > >   Thanks,
> > >
> > >       Matt
> > >
> > >
> >
> >
>
>

-- 
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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