Bug#882667: hypre: CUDA support: hacks impeded by -W flags

[Drew Parsons]

Source: hypre
Followup-For: Bug #882667

Following up this bug for GPU support via HIP (ROCm) since CUDA is non-free.

To be activated through -DHYPRE_ENABLE_HIP=ON and related options.

But it needs the GPU to be specified for a general build.
(i.e. when not building for a local GPU).

Then this is a problem:

-- CMAKE_HIP_ARCHITECTURES is explicitly set to: gfx90a,gfx906,gfx908,gfx942,gfx950,gfx1100,gfx1101,gfx1151,gfx1201
CMake Error at config/cmake/HYPRE_SetupHIPToolkit.cmake:141 (message):
  HYPRE does not support building a single binary for mixed HIP
  architectures: found both gfx9 (CDNA) and gfx10+ (RDNA) in
  CMAKE_HIP_ARCHITECTURES='gfx90a,gfx906,gfx908,gfx942,gfx950,gfx1100,gfx1101,gfx1151,gfx1201'.

  Please specify a single architecture via -DCMAKE_HIP_ARCHITECTURES=<gfx-id>
  (e.g., gfx90a or gfx1100) and build separate binaries for each architecture
  family.
Call Stack (most recent call first):
  config/cmake/HYPRE_SetupGPUToolkit.cmake:72 (include)
  CMakeLists.txt:449 (include)