Toujours problème de lien avce la lib Cblas
salu tous le monde ;
SVP aider moi parceque je traine depuis plus d 'une semaine...... :arf: :arf:
mon probleme c que j'arrive pas a faire la liaison entre bibliotheque 'cblas' et mon progrmme j' ai toujour la meme erreur
Voii mon programme
Code:
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/* cblas_example1.c */
#include <stdio.h>
#include <stdlib.h>
#include "cblas.h"
int main ( )
{
enum CBLAS_ORDER order;
enum CBLAS_TRANSPOSE transa;
double *a, *x, *y;
double alpha, beta;
int m, n, lda, incx, incy, i;
order = CblasColMajor;
transa = CblasNoTrans;
m = 4; /* Size of Column ( the number of rows ) */
n = 4; /* Size of Row ( the number of columns ) */
lda = 4; /* Leading dimension of 5 * 4 matrix is 5 */
incx = 1;
incy = 1;
alpha = 1;
beta = 0;
a = (double *)malloc(sizeof(double)*m*n);
x = (double *)malloc(sizeof(double)*n);
y = (double *)malloc(sizeof(double)*n);
/* The elements of the first column */
a[0] = 1;
a[1] = 2;
a[2] = 3;
a[3] = 4;
/* The elements of the second column */
a[m] = 1;
a[m+1] = 1;
a[m+2] = 1;
a[m+3] = 1;
/* The elements of the third column */
a[m*2] = 3;
a[m*2+1] = 4;
a[m*2+2] = 5;
a[m*2+3] = 6;
/* The elements of the fourth column */
a[m*3] = 5;
a[m*3+1] = 6;
a[m*3+2] = 7;
a[m*3+3] = 8;
/* The elemetns of x and y */
x[0] = 1;
x[1] = 2;
x[2] = 1;
x[3] = 1;
y[0] = 0;
y[1] = 0;
y[2] = 0;
y[3] = 0;
cblas_dgemv( order, transa, m, n, alpha, a, lda, x, incx, beta,
y, incy );
/* Print y */
for( i = 0; i < n; i++ )
printf(" y%d = %f\n", i, y[i]);
free(a);
free(x);
free(y);
return 1;
}
-------------------------------------------------------------------------- |
Voici les deux instructions de complilatin et de liaison:
gcc -c -O3 -DADD_ -I/home/student/Desktop/CBLAS/src cblas_example1.c
g77 -o cblas_ex1 cblas_example1.o -I/home/student/Desktop/CBLAS/libcblas.a
et Voici l'erreur:
student@MasterControl:~/Desktop$ blas_example1.o: In function `main':
> cblas_example1.c: (.text+0x169): undefined reference to `cblas_dgemv'
> collect2: ld returned 1 exit status
merci pour votre aide
