Commits on Feb 7, 2023

1. ignore external cast-function-type warnings …

   When building on Ubuntu 22.04 (gcc 11.3) with OpenMPI I am getting the
   following warnings:
   ```
   [ 58%] Building CXX object
   source/base/CMakeFiles/obj_base_release.dir/symbolic_function.cc.o
   In file included from
   /usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/ompi/mpi/cxx/mpicxx.h:277,
   from
   /usr/lib/x86_64-linux-gnu/openmpi/include/mpi.h:2887,
   from
   /home/runner/dealii-candi/tmp/build/deal.II-master/include/deal.II/base/config.h:576,
   from
   /home/runner/dealii-candi/tmp/unpack/deal.II-master/include/deal.II/base/symbolic_function.templates.h:19,
   from
   /home/runner/dealii-candi/tmp/unpack/deal.II-master/source/base/symbolic_function.cc:16:
   /usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/ompi/mpi/cxx/op_inln.h:
   In member function ‘virtual void MPI::Op::Init(void (*)(const void*,
   void*, int, const MPI::Datatype&), bool)’:
   /usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/ompi/mpi/cxx/op_inln.h:121:25:
   warning: cast between incompatible function types from ‘void (*)(void*,
   void*, int*, ompi_datatype_t**, void (*)(void*, void*, int*,
   ompi_datatype_t**))’ to ‘void (*)(void*, void*, int*,
   ompi_datatype_t**)’ [-Wcast-function-type]
     121 |     (void)MPI_Op_create((MPI_User_function*)
   ```
   The code in question doesn't look correct, but we are not using the c++
   wrappers anyways.

   

   tjhei committed Feb 7, 2023
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