我在单独的编译模式下使用Cuda 5.0。 在
thrust/system/cuda/detail/detail/b40c/kernel_utils.h
有这个定义
__shared__ int vote_reduction[B40C_WARP_THREADS];
链接器抱怨vote_reduction
的多重定义。
这是什么解决方法?
已添加:重现问题的代码
推力版本:100600
iterator.h
#pragma once
#include <thrust/transform_reduce.h>
#include <thrust/functional.h>
struct Unary_Op
{
__host__ __device__ int operator()(const int index) const;
};
int iterates(int start, int end);
iterator.cu
#include "iterator.h"
__host__ __device__ int Unary_Op::operator()(const int index) const
{
return index;
}
int iterates(int start, int end)
{
thrust::counting_iterator<int> first(start);
thrust::counting_iterator<int> last = first + end;
Unary_Op unary_op = Unary_Op();
thrust::plus<int> binary_op;
int init = 0;
int sum = thrust::transform_reduce(first, last, unary_op, init, binary_op);
return sum;
}
calculation.h
#include "iterator.h"
int compute();
calculation.cu
#include "calculation.h"
int compute()
{
return iterates(0,10);
}
main.cu
#include "calculation.h"
int main()
{
compute();
return 0;
}
编译命令(NSight)
Building file: ../calculation.cu
Invoking: NVCC Compiler
nvcc -G -g -O0 -gencode arch=compute_20,code=sm_20 -odir "" -M -o "calculation.d" "../calculation.cu"
nvcc --device-c -G -O0 -g -gencode arch=compute_20,code=sm_20 -x cu -o "calculation.o" "../calculation.cu"
Building file: ../iterator.cu
Invoking: NVCC Compiler
nvcc -G -g -O0 -gencode arch=compute_20,code=sm_20 -odir "" -M -o "iterator.d" "../iterator.cu"
nvcc --device-c -G -O0 -g -gencode arch=compute_20,code=sm_20 -x cu -o "iterator.o" "../iterator.cu"
Building file: ../main.cu
Invoking: NVCC Compiler
nvcc -G -g -O0 -gencode arch=compute_20,code=sm_20 -odir "" -M -o "main.d" "../main.cu"
nvcc --device-c -G -O0 -g -gencode arch=compute_20,code=sm_20 -x cu -o "main.o" "../main.cu"
Invoking: NVCC Linker
nvcc --relocatable-device-code=true -gencode arch=compute_20,code=sm_20 -link -o "testt" ./calculation.o ./iterator.o ./main.o
nvlink error : Multiple definitions of '_ZN6thrust6system4cuda6detail6detail11b40c_thrust14vote_reductionE'
nvlink error : Multiple definitions of '_ZN6thrust6system4cuda6detail6detail11b40c_thrust14vote_reductionE'
make: *** [tt] Error 255
答案 0 :(得分:1)
这似乎是单独编译的错误或问题,该编译特定于CUDA 5.x工具包中提供的推力版本。升级或降级到推力1.5.3或推力1.7似乎已经解决了这个问题
[此答案已经从评论中汇总而成,并作为社区维基条目添加,以便将问题从未回答的问题列表中删除]