Fix a few build errors when building with the CUDA backend

Author: thilinarmtb

CMakeLists.txt

@@ -37,7 +37,7 @@ if (ENABLE_OPENCL)
 endif()
 if (ENABLE_CUDA)
   find_package(CUDAToolkit REQUIRED)
-  if (CUDA_FOUND)
+  if (CUDAToolkit_FOUND)
     list(APPEND SOURCES backends/cuda.c)
   else()
     message(FATAL_ERROR "ENABLE_CUDA is ON but unable to find CUDA runtime.")

backends/cuda.c

@@ -10,7 +10,7 @@ static const char *ERR_STR_BACKEND_FAILURE = "CUDA %s failure: %s.";
 #define RUNTIME_COMPILATION nvrtc
 #define RUNTIME cu
 
-#define backendDeviceProp_t cudaDeviceProp
+#define backendDeviceProp_t struct cudaDeviceProp
 
 #define backendModuleLaunchKernel cuLaunchKernel