Compilation of deal.II fails due to conversion error from std::complex<double> to double

[develo...@googlemail.com]

Hei,

I'm currently trying to compile deal.II on my local machine, but encounter the following compilation error:

[  0%] Built target expand_instantiations_exe
[  0%] Built target doxygen_headers
[  0%] Built target object_arborx_inst
[  0%] Built target object_arborx_debug
[  4%] Built target object_numerics_inst
Consolidate compiler generated dependencies of target object_numerics_debug
[  4%] Building CXX object source/numerics/CMakeFiles/object_numerics_debug.dir/unity_0.cc.o
In file included from /home/user/Downloads/git-files/dealii/build/source/numerics/unity_0.cc:5:
In file included from /home/user/Downloads/git-files/dealii/source/numerics/data_out.cc:16:
In file included from /home/user/Downloads/git-files/dealii/include/deal.II/base/work_stream.h:20:
In file included from /home/user/Downloads/git-files/dealii/build/include/deal.II/base/config.h:584:
/home/user/Downloads/git-files/dealii/include/deal.II/base/numbers.h:533:12: warning: explicit comparison with NaN in fast floating point mode [-Wtautological-constant-compare]
    return std::isnan(x);
           ^~~~~~~~~~~~~
In file included from /home/user/Downloads/git-files/dealii/build/source/numerics/unity_0.cc:10:
In file included from /home/user/Downloads/git-files/dealii/source/numerics/dof_output_operator.cc:23:
In file included from /home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_block_vector.h:27:
In file included from /home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_vector.h:29:
/home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_vector_base.h:1324:55: error: no matching constructor for initialization of 'boost::serialization::array_wrapper<const double>'
    boost::serialization::array_wrapper<const double> wrapper(
                                                      ^
/media/storage/local_opt/boost/include/boost/serialization/array_wrapper.hpp:46:5: note: candidate constructor not viable: no known conversion from 'const PetscScalar *' (aka 'const complex<double> *') to 'const double *' for 1st argument
    array_wrapper(T * t, std::size_t s) :
    ^
/media/storage/local_opt/boost/include/boost/serialization/array_wrapper.hpp:41:5: note: candidate constructor not viable: requires single argument 'rhs', but 2 arguments were provided
    array_wrapper(const array_wrapper & rhs) :
    ^
In file included from /home/user/Downloads/git-files/dealii/build/source/numerics/unity_0.cc:10:
In file included from /home/user/Downloads/git-files/dealii/source/numerics/dof_output_operator.cc:23:
In file included from /home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_block_vector.h:27:
In file included from /home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_vector.h:29:
/home/user/Downloads/git-files/dealii/include/deal.II/lac/petsc_vector_base.h:1363:49: error: no matching constructor for initialization of 'boost::serialization::array_wrapper<double>'
    boost::serialization::array_wrapper<double> velocity_wrapper(
                                                ^
/media/storage/local_opt/boost/include/boost/serialization/array_wrapper.hpp:46:5: note: candidate constructor not viable: no known conversion from 'PetscScalar *' (aka 'complex<double> *') to 'double *' for 1st argument
    array_wrapper(T * t, std::size_t s) :
    ^
/media/storage/local_opt/boost/include/boost/serialization/array_wrapper.hpp:41:5: note: candidate constructor not viable: requires single argument 'rhs', but 2 arguments were provided
    array_wrapper(const array_wrapper & rhs) :
    ^
1 warning and 2 errors generated.
make[2]: *** [source/numerics/CMakeFiles/object_numerics_debug.dir/build.make:76: source/numerics/CMakeFiles/object_numerics_debug.dir/unity_0.cc.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:1805: source/numerics/CMakeFiles/object_numerics_debug.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

PETSc was configured to use complex values. The same for deal.II, but I still get that error. CMakeCache is attached, but how can I fix that problem?
Thanks!
Regards,
Roland Richter

[Daniel Arndt]

Roland,

Using PETSc with complex values is pretty niche and there isn't much CI in place for this case.

It looks like

  boost::serialization::array_wrapper<const double> wrapper(

should be replaced with

  boost::serialization::array_wrapper<const PetscScalar> wrapper(

and similarly in VectorBase::load.

Best,

Daniel

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[Wolfgang Bangerth]

On 10/15/23 10:04, Daniel Arndt wrote:
>
> Using PETSc with complex values is pretty niche and there isn't much CI in
> place for this case.
> It looks like
>
>   boost::serialization::array_wrapper<const double> wrapper(
>
> should be replaced with
>
>   boost::serialization::array_wrapper<const PetscScalar> wrapper(
>
> and similarly in VectorBase::load.

Now also here:
https://github.com/dealii/dealii/issues/16146
Patches are, as always, very much welcome!

Best
W.

--
------------------------------------------------------------------------
Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[develo...@googlemail.com]

And it's already fixed, thanks for the fast help! I was already wondering what had changed, as this configuration had worked for me before.

Thanks!

Regards,

Roland