Question

我尝试编译并运行以下代码，取自cuBLAS指南。

//Example 2. Application Using C and CUBLAS: 0-based indexing 
//----------------------------------------------------------- 
#include <stdio.h> 
#include <stdlib.h> 
#include <math.h> 
#include <cuda_runtime.h>
#include "cublas_v2.h"
#define M 6 
#define N 5 
#define IDX2C(i,j,ld) (((j)*(ld))+(i)) 

static __inline__ void modify(cublasHandle_t handle, float *m, int ldm, int n, int p, int q, float alpha, float beta) {
    cublasSscal(handle, n - p, &alpha, &m[IDX2C(p, q, ldm)], ldm); cublasSscal(handle, ldm - p, &beta, &m[IDX2C(p, q, ldm)], 1);
}

int main(void) {
    cudaError_t cudaStat;
    cublasStatus_t stat;
    cublasHandle_t handle;
    int i, j;
    float* devPtrA;
    float* a = 0;

    a = (float *)malloc(M * N * sizeof(*a));

    if (!a) {
        printf("host memory allocation failed");
        return EXIT_FAILURE;
    }

    for (j = 0; j < N; j++) {
        for (i = 0; i < M; i++) {
            a[IDX2C(i, j, M)] = (float)(i * M + j + 1);
        }
    }

    cudaStat = cudaMalloc((void**)&devPtrA, M*N * sizeof(*a));
    if (cudaStat != cudaSuccess) {
        printf("device memory allocation failed");
        return EXIT_FAILURE;
    }

    stat = cublasCreate(&handle);
    if (stat != CUBLAS_STATUS_SUCCESS) {
        printf("CUBLAS initialization failed\n");
        return EXIT_FAILURE;
    }

    stat = cublasSetMatrix(M, N, sizeof(*a), a, M, devPtrA, M);

    if (stat != CUBLAS_STATUS_SUCCESS) {
        printf("data download failed");
        cudaFree(devPtrA);
        cublasDestroy(handle);
        return EXIT_FAILURE;
    }

    modify(handle, devPtrA, M, N, 1, 2, 16.0f, 12.0f);
    stat = cublasGetMatrix(M, N, sizeof(*a), devPtrA, M, a, M);

    if (stat != CUBLAS_STATUS_SUCCESS) {
        printf("data upload failed"); cudaFree(devPtrA);
        cublasDestroy(handle);
        return EXIT_FAILURE;
    } 

    cudaFree(devPtrA); 
    cublasDestroy(handle); 
    for (j = 0; j < N; j++) { 
        for (i = 0; i < M; i++) { 
            printf("%7.0f", a[IDX2C(i, j, M)]); 
        } 
        printf("\n"); 
    } 

    free(a); 
    return EXIT_SUCCESS;
}

我得到了一些未解决的符号错误，我已经检查了我的链接器设置是否正常，以及包含。他们似乎没问题，可能是什么问题？我的猜测是问题在于cublas_v2.h包括在内，我还试图用简单的cublas.h来改变它，但仍然无法正常工作。

未解析的符号为cublasCreate_v2,cublasDestroy_v2,cublasSetMatrix,cublasGetMatrix,cublasSscal_v2

cuBLAS示例，外部符号未解析，VS2015

0 个答案: