message: cuda build fix (duplicate optimization flags)
diff: @@ -50,7 +50,7 @@ else()
  set(ENOKI_ARCH_FLAGS_FILE archflags_unix.cpp)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
  if (ENOKI_CUDA AND CMAKE_BUILD_TYPE MATCHES "Release")
  - set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -O3 -DNDEBUG")
  + set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -DNDEBUG")
  endif()
  endif()
  