Warnings in the CUDA backend

[nkoukpaizan]

I noticed some warnings in the CUDA backend while testing #371. Deprecated features that may be removed in future CUDA versions.

A first set of warning pertains to csrilu02Info_t

In file included from /home/97k/ReSolve/tests/functionality/testRandGmres.cpp:27:
/home/97k/ReSolve/resolve/LinSolverDirectCuSparseILU0.hpp:65:40: warning: ‘csrilu02Info_t’ is deprecated: The type will be removed in the next major release [-Wdeprecated-declarations]
   65 |     csrilu02Info_t      info_A_{nullptr};
      |                                        ^
In file included from /usr/local/cuda/include/cusolverSp.h:53,
                 from /home/97k/ReSolve/resolve/workspace/LinAlgWorkspaceCUDA.hpp:4,
                 from /home/97k/ReSolve/resolve/workspace/LinAlgWorkspace.hpp:6,
                 from /home/97k/ReSolve/tests/functionality/testRandGmres.cpp:24:
/usr/local/cuda/include/cusparse.h:238:22: note: declared here
  238 | struct csrilu02Info* csrilu02Info_t CUSPARSE_DEPRECATED_TYPE;
      |                      ^~~~~~~~~~~~~~

Another set of warnings pertains to cuSolver calls. We have found cuDSS to be less performant that cuSolver, but we will eventually need to address this if the feature is removed. E.g.,

/home/97k/ReSolve/resolve/LinSolverDirectCuSolverRf.cpp: In member function ‘virtual int ReSolve::LinSolverDirectCuSolverRf::setup(ReSolve::matrix::Sparse*, ReSolve::matrix::Sparse*, ReSolve::matrix::Sparse*, ReSolve::index_type*, ReSolve::index_type*, ReSolve::LinSolverDirectCuSolverRf::vector_type*)’:
/home/97k/ReSolve/resolve/LinSolverDirectCuSolverRf.cpp:135:47: warning: ‘cusolverStatus_t cusolverRfSetupDevice(int, int, int*, int*, double*, int, int*, int*, double*, int, int*, int*, double*, int*, int*, cusolverRfHandle_t)’ is deprecated: please use cuDSS instead [-Wdeprecated-declarations]

Build environment:

• pdesx system
• CUDA 12.9
• gcc 11.4.0

[pelesh]

I'm not sure we can do anything about it except to find a flag to suppress deprecation warnings. CUDA libraries we used in Re::Solve will not be available in CUDA 13.