Testing

Build	CUDA-9.2-NVCC-CUDA-AWARE-MPI	CUDA-10.2-NVCC	CUDA-10.0-Clang	Clang	PGI	HIP	SYCL
Kokkos	3.1.00	3.1.00	3.1.00	3.1.00	3.1.00	3.2.00	3.4.00
Serial	✔️	✔️			✔️	✔️	✔️
OpenMP		✔️		✔️	✔️
POSIX Threads			✔️
Cuda	9.2	10.2	10.0
HIP						4.0
SYCL							2021-03-11 (https://github.com/intel/llvm/releases/tag/sycl-nightly%2F20210311)
MPI	✔️	✔️		✔️	✔️	✔️	✔️
OpenMPI	3.1.3	3.1.3	3.1.3	3.1.3	3.1.3	3.1.3	3.1.3
CUDA-aware	✔️
CXX compiler	nvcc_wrapper	nvcc_wrapper	clang++	clang++	pgc++	hipcc	clang++
Compiler ID	GNU 7.4.0	GNU 7.4.0	Clang 10.0.0	Clang 10.0.0	PGI 19.4.0	Clang 12.0.0	Clang 13.0.0
Clang-Tidy				✔️
CMake	3.13.4	3.13.4	3.13.4	3.13.4	3.13.4	3.18.5	3.19.0
Boost	1.67.0	1.67.0	1.67.0	1.67.0	1.71.0	1.72.0	1.72.0
Benchmark	1.4.1	1.4.1	1.4.1	1.4.1	1.4.1	1.5.0	1.5.0

Known issues

• LLVM 10.0.0 fails with CUDA-9.2 due to a ptx issue (also producing warnings like Instruction 'shfl' without '.sync' may produce unpredictable results on sm_70 and later architectures despite not using __shfl anywhere. However, LLVM 7.0.1 with CUDA-9.2 works fine.
• HIP hits a compiler bug in functions calling assert, e.g. in the tree traversal for nearest predicates. A workaround is to define globally via adding NDEBUG to CMAKE_CXX_FLAGS.
• The SYCL backend can't be compiled without optimization flags (ptxas link errors), printf and assert don't work on the device.