build_ascent_hip_frontier.sh fails when compiling vtkm

[mlohry]

Using build_ascent_hip_frontier.sh on frontier, it looks like some part of vtkm isn't properly including mpi:

[...]/ascent/scripts/build_ascent/source/vtk-m-v2.1.0/vtkm/filter/flow/internal/BoundsMap.h:25:10: fatal error: 'mpi.h' file not found

If I force the include with export CPATH=/opt/cray/pe/mpich/8.1.28/ofi/crayclang/17.0/include/ it passes this point.

[cyrush]

When compiling with the cray compilers, they know where MPI exists.

However, in VTK-m, the compile drops to only use amdclang++ to compile device code and it does not know about implicit mpi paths.

The fix is to add the MPI include path to general includes, we can add this to the frontier script.

[cyrush]

@mlohry

Where you trying the latest script, we do have some logic to address this:

ascent/scripts/build_ascent/build_ascent_hip_frontier.sh

Line 16 in 10b1253

export CXXFLAGS="${CRAY_ROCM_INCLUDE_OPTS} -I/opt/cray/pe/mpich/8.1.28/ofi/crayclang/17.0/include/ -Wno-pass-failed"

[mlohry]

@cyrush yes I used the latest and I see that line there, odd that it didn't work.