如何将CUDA库与Cilk ++链接 [英] How to link CUDA library with Cilk++

问题描述

我正在尝试使用Intel的Cilk ++和Nvidia的CUDA开发一些混合程序. 我从Cuda代码(libtest.so)创建了一个共享库.我想将其与Cilk ++程序链接，以便可以将一些工作卸载到GPU.但是，当我编译cilk ++程序时，无法将其与此cuda库链接，并且出现如下错误:

nvcc -arch=compute_20 -L. -code=sm_20 -L. -o libtest.so --shared -Xcompiler -fPIC test.cu;

cilk++ -o main -L. -ltest main.cilk;

/tmp/ccwDvzCG.o: In function `int cilk_main(int, char**)':
main.cilk:(.text+0x26): undefined reference to `void entry()'
collect2: ld returned 1 exit status

文件:test.cu

#include <stdio.h>

__global__ void myk(void){
    printf("Hello from thread %d block %d\n", threadIdx.x, blockIdx.x);
}

extern "C++"
void entry(void){
    myk<<<1,1>>>();
    printf("CUDA status: %d\n", cudaDeviceSynchronize());
}

文件:main.cilk

#include <cilk.h>

void entry(void);

int cilk_main(void){
    entry();
}

以前，我已将Cilk库与CUDA代码链接在一起，但现在我想反过来. 是否可以将CUDA与Cilk链接?如果是这样，我想念什么?

解决方案

extern子句应该在C ++代码中，而不在CUDA代码中，因为在这里您在CUDA文件中定义了功能，但是在C ++代码中对其进行了定义./p>

I am trying to develop some Hybrid program using Intel's Cilk++ and Nvidia's CUDA. I created a Shared library from Cuda code(libtest.so). And I want to link it with Cilk++ program, so that I can offload some work to GPU. But when I compile cilk++ program I am not able to link it with this cuda library and I get error as follows:

nvcc -arch=compute_20 -L. -code=sm_20 -L. -o libtest.so --shared -Xcompiler -fPIC test.cu;

cilk++ -o main -L. -ltest main.cilk;

/tmp/ccwDvzCG.o: In function `int cilk_main(int, char**)':
main.cilk:(.text+0x26): undefined reference to `void entry()'
collect2: ld returned 1 exit status

File: test.cu

#include <stdio.h>

__global__ void myk(void){
    printf("Hello from thread %d block %d\n", threadIdx.x, blockIdx.x);
}

extern "C++"
void entry(void){
    myk<<<1,1>>>();
    printf("CUDA status: %d\n", cudaDeviceSynchronize());
}

File: main.cilk

#include <cilk.h>

void entry(void);

int cilk_main(void){
    entry();
}

Previously I have linked Cilk library with CUDA code, But now I want the other way round. Is it possible to link CUDA with Cilk? If So, what am I missing?

解决方案

The extern clause should be in C++ code and not in the CUDA code because here you have definition of function in CUDA file but you call it in C++ code.

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