cuda:cmake编译cuda

 http://www.cmake.org/

下载了最新的cmake，调用了里面的一个FindCUDA.cmake，完成了自己的第一次使用cmake编译cuda代码。具体步骤如下：

1.下载最新版的cmake（其实只要有FindCUDA.cmake这个文件，你就可以编译cuda与c或者c++混合的代码文件了）

2.因为初次测试，所以我把所有的文件都放在同一个文件夹下面：c_cpp_cu1.cu;c_cpp_cu3.cpp两个源文件加一个CMakeLists.txt文件；

3.CmakeLists.txt

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(test_cuda)
INCLUDE(/..../Downloads/cmake-3.2.2-Linux-x86_64/share/cmake-3.2/Modules/FindCUDA.cmake)
CUDA_ADD_EXECUTABLE(test_cuda 
c_cpp_cu3.cpp
c_cpp_cu1.cu)

4.c_cpp_cu3.cpp

    #include   
    using namespace std;    
    extern "C" int func(); //注意这里的声明  
    int main()  
    {  
        func();  
        return 0;  
    }  

5.c_cpp_cu1.cu

#include 
#include 
#include 

#define ROWS 32
#define COLS 16
#define CHECK(res) if(res!=cudaSuccess){exit(-1);}
__global__ void Kerneltest(int **da, unsigned int rows, unsigned int cols)
{
  unsigned int row = blockDim.y*blockIdx.y + threadIdx.y;
  unsigned int col = blockDim.x*blockIdx.x + threadIdx.x;
  if (row < rows && col < cols)
  {
    da[row][col] = row*cols + col;
  }
}

extern "C" int func() // 注意这里定义形式
{
  int **da = NULL;
  int **ha = NULL;
  int *dc = NULL;
  int *hc = NULL;
  cudaError_t res;
  int r, c;
  bool is_right=true;

  res = cudaMalloc((void**)(&da), ROWS*sizeof(int*));CHECK(res)
  res = cudaMalloc((void**)(&dc), ROWS*COLS*sizeof(int));CHECK(res)
  ha = (int**)malloc(ROWS*sizeof(int*));
  hc = (int*)malloc(ROWS*COLS*sizeof(int));

  for (r = 0; r < ROWS; r++)
  {
    ha[r] = dc + r*COLS;
  }
  res = cudaMemcpy((void*)(da), (void*)(ha), ROWS*sizeof(int*), cudaMemcpyHostToDevice);CHECK(res)
  dim3 dimBlock(16,16);
  dim3 dimGrid((COLS+dimBlock.x-1)/(dimBlock.x), (ROWS+dimBlock.y-1)/(dimBlock.y));
  Kerneltest<<>>(da, ROWS, COLS);
  res = cudaMemcpy((void*)(hc), (void*)(dc), ROWS*COLS*sizeof(int), cudaMemcpyDeviceToHost);CHECK(res)

  for (r = 0; r < ROWS; r++)
  {
    for (c = 0; c < COLS; c++)
    {   
      printf("%4d ", hc[r*COLS+c]);
      if (hc[r*COLS+c] != (r*COLS+c))
      {   
        is_right = false;
      }   
    }   
    printf("\n");
  }
  printf("the result is %s!\n", is_right? "right":"false");

  cudaFree((void*)da);
  cudaFree((void*)dc);
  free(ha);
  free(hc);
//  getchar();
  return 0;
}

完成，生成一大堆文件+test_cuda的可执行文件