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

Satish Balay balay at mcs.anl.gov
Thu May 13 16:15:14 CDT 2021

>         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:



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

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