CUDA不支持外部呼叫 [英] CUDA External calls not supported

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问题描述

我正在开发一个在Fermi卡上运行的CUDA 4.0应用程序。根据规范,Fermi具有Compute Capability 2.0,因此应该支持非内联函数调用。



我在一个不同的obj文件中编译每个类的nvcc 4.0。然后,我将它们全部与g ++ - 4.4链接。



请考虑以下代码:



cuh]

  #include< cuda_runtime.h> 

struct A
{
__device__ __host__ void functionA();
};

[File B.cuh]

  #include< cuda_runtime.h> 

struct B
{
__device__ __host__ void functionB();
};

[File A.cu]

  #includeA.cuh
#includeB.cuh

void A :: functionA()
{
B b;
b.functionB();
}

尝试使用 nvcc -o Ao -c A.cu -arch = sm_20 输出错误:不支持外部调用(发现非内联调用_ZN1B9functionBEv)。<

解决方案必须

div>

正如 NVidia论坛上的此主题所述,似乎即使费米支持非内联函数,nvcc仍然需要在编译期间有所有的功能,即在同一个源文件:没有链接器(是的,这是一个遗憾...)。


I am developing a CUDA 4.0 application running on a Fermi card. According to the specs, Fermi has Compute Capability 2.0 and therefore should support non-inlined function calls.

I compile every class I have with nvcc 4.0 in a distinct obj file. Then, I link them all with g++-4.4.

Consider the following code :

[File A.cuh]

#include <cuda_runtime.h>

struct A
{
    __device__ __host__ void functionA();
};

[File B.cuh]

#include <cuda_runtime.h>

struct B
{
    __device__ __host__ void functionB();
};

[File A.cu]

#include "A.cuh"
#include "B.cuh"

void A::functionA()
{
    B b;
    b.functionB();
}

Attempting to compile A.cu with nvcc -o A.o -c A.cu -arch=sm_20 outputs Error: External calls are not supported (found non-inlined call to _ZN1B9functionBEv).

I must be doing something wrong, but what ?

解决方案

As explained on this thread on the NVidia forums, it appears that even though Fermi supports non-inlined functions, nvcc still needs to have all the functions available during compilation, i.e. in the same source file: there is no linker (yep, that's a pity...).

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