cuda - 编译helloworld.cu时遇到问题

Question

在Ubuntu 10.10中编译此hello world示例时

这来自CUDA by Example，第3章(未提供编译指令>:@)

#include <iostream>

__global__ void kernel (void){


}

int main(void){

    kernel <<<1,1>>>();
        printf("Hellow World!\n");
    return 0;

}

我懂了:

$ nvcc -lcudart hello.cu hello.cu(11): error: identifier "printf" is undefined

1 error detected in the compilation of "/tmp/tmpxft_00007812_00000000-4_hello.cpp1.ii".

为什么？此代码应如何编译？

Answer 1

您需要为stdio.h包括cstdio或iostream而不是std::cout(用于printf的东西)(请参阅man 3 printf)。我找到了here这本书的源代码。
chapter03/hello_world.cu实际上是:

/*
* Copyright 1993-2010 NVIDIA Corporation. All rights reserved.
*
* NVIDIA Corporation and its licensors retain all intellectual property and
* proprietary rights in and to this software and related documentation.
* Any use, reproduction, disclosure, or distribution of this software
* and related documentation without an express license agreement from
* NVIDIA Corporation is strictly prohibited.
*
* Please refer to the applicable NVIDIA end user license agreement (EULA)
* associated with this source code for terms and conditions that govern
* your use of this NVIDIA software.
*
*/


#include "../common/book.h"

int main( void ) {
printf( "Hello, World!\n" );
return 0;
}

其中../common/book.h包括stdio.h。
README.txt文件详细说明了如何编译示例:

这些代码示例中的绝大多数都可以通过使用以下命令轻松编译
NVIDIA的CUDA编译器驱动程序nvcc。为了编译一个典型的例子，说
您只需执行“example.cu”:

> nvcc example.cu