message: require c++14
diff: @@ -25,8 +25,8 @@ set(ENABLE_TESTS Off CACHE BOOL "Enable BLT and RAJA tests")
  set(ENABLE_EXAMPLES Off CACHE BOOL "Enable RAJA examples")
  set(RAJA_ENABLE_EXERCISES Off CACHE BOOL "Enable RAJA exercises")
  -set(CMAKE_CXX_STANDARD 11)
  -set(BLT_CXX_STANDARD 11)
  +set(CMAKE_CXX_STANDARD 14)
  +set(BLT_CXX_STANDARD 14)
  include(blt/SetupBLT.cmake)
  @@ -106,7 +106,7 @@ 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}")
  