I know the method of calling the .cu files from .c files. But now I want to call the .cu files from a C header file. Is it possible to do it ? If so how should I make the settings of my project ? please help.....

解决方案

Here's a worked example:

file1.h:

int hello();

file2.h:

#include

#include "file1.h"

int myfunc(){

hello();

return 0;

}

file1.cu:

#include

#include "file1.h"

__global__ void mykernel(){

printf("Hello from mykernel\n");

}

int hello(){

mykernel<<<1,1>>>();

cudaDeviceSynchronize();

return 0;

}

file2.cpp:

#include "file2.h"

int main(){

myfunc();

return 0;

}

build and test:

$ nvcc -arch=sm_20 -c file1.cu

$ g++ -c file2.cpp

$ g++ -o test file1.o file2.o -L/usr/local/cuda/lib64 -lcudart

$ ./test

Hello from mykernel

$

Assuming you are intending to include your file2.h into a cpp file, you cannot call a cuda kernel directly from that header and use it in a cpp file. You must put a wrapper around the cuda kernel, and call the wrapper, as I have indicated. This is because your cpp file will get compiled by the host compiler, which doesn't know anything about cuda syntax (e.g. mykernel<<<1,1>>>();)

Also, as indicated in the comments, it may make more sense to reserve the header file file2.h just for needed prototypes, and put the actual function definition of myfunc into a cpp file somewhere.