CUDA: Visual Studio now properly delays device linking

1 files changed, 53 insertions, 0 deletions

diff --git a/Tests/CudaOnly/SeparateCompilation/main.cu b/Tests/CudaOnly/SeparateCompilation/main.cu
index 03e0921..40dbe5d 100644
--- a/Tests/CudaOnly/SeparateCompilation/main.cu
+++ b/Tests/CudaOnly/SeparateCompilation/main.cu
@@ -7,9 +7,62 @@
 int file4_launch_kernel(int x);
 int file5_launch_kernel(int x);
 
+int choose_cuda_device()
+{
+  int nDevices = 0;
+  cudaError_t err = cudaGetDeviceCount(&nDevices);
+  if (err != cudaSuccess) {
+    std::cerr << "Failed to retrieve the number of CUDA enabled devices"
+              << std::endl;
+    return 1;
+  }
+  for (int i = 0; i < nDevices; ++i) {
+    cudaDeviceProp prop;
+    cudaError_t err = cudaGetDeviceProperties(&prop, i);
+    if (err != cudaSuccess) {
+      std::cerr << "Could not retrieve properties from CUDA device " << i
+                << std::endl;
+      return 1;
+    }
+    if (prop.major >= 3) {
+      err = cudaSetDevice(i);
+      if (err != cudaSuccess) {
+        std::cout << "Could not select CUDA device " << i << std::endl;
+      } else {
+        return 0;
+      }
+    }
+  }
+
+  std::cout << "Could not find a CUDA enabled card supporting compute >=3.0"
+            << std::endl;
+
+  return 1;
+}
+
 int main(int argc, char** argv)
 {
+  int ret = choose_cuda_device();
+  if (ret) {
+    return 0;
+  }
+
+  cudaError_t err;
   file4_launch_kernel(42);
+  err = cudaGetLastError();
+  if (err != cudaSuccess) {
+    std::cerr << "file4_launch_kernel: kernel launch failed: "
+              << cudaGetErrorString(err) << std::endl;
+    return 1;
+  }
+
   file5_launch_kernel(42);
+  err = cudaGetLastError();
+  if (err != cudaSuccess) {
+    std::cerr << "file5_launch_kernel: kernel launch failed: "
+              << cudaGetErrorString(err) << std::endl;
+    return 1;
+  }
+
   return 0;
 }