message: Set CUDA standard to C++14
diff: @@ -95,7 +95,7 @@ set(RAJAPERF_BUILD_SYSTYPE $ENV{SYS_TYPE})
  set(RAJAPERF_BUILD_HOST $ENV{HOSTNAME})
  if (ENABLE_CUDA)
  - set(CMAKE_CUDA_STANDARD 11)
  + set(CMAKE_CUDA_STANDARD 14)
  set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -restrict -arch ${CUDA_ARCH} --expt-extended-lambda --expt-relaxed-constexpr")
  set(RAJAPERF_COMPILER "${CUDA_NVCC_EXECUTABLE}")
  