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When I try to compile the cpp code in matlab

#include "mex.h"
#include "mkl_vml.h"
#include "mkl_cblas.h"
#include "mkl_service.h"
#include <omp.h>
typedef ptrdiff_t intt;

void mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[] )
{
   if( nrhs != 2) mexErrMsgTxt("2 inputs are required.");
   if( nlhs != 1) mexErrMsgTxt("1 output is required.");

   float *X = (float*)mxGetPr(prhs[0]);
   intt dim = mxGetM(prhs[0]), m = mxGetN(prhs[0]);

   float gamma = (float)mxGetScalar(prhs[1]);

   /*- Init -*/
   int mkldy = mkl_get_dynamic();
   mkl_set_dynamic(1);

   // Distance matrix D=-gamma*0.5(x^2+y^2 - xy) //
   float *D = (float*)mxCalloc(m*m,sizeof(float));

   cblas_ssyrk(CblasColMajor,CblasUpper,CblasTrans,m,dim,gamma,X,dim,0.0,D,m);

   float *diagD = (float*)mxCalloc(m, sizeof(float));
   float *ones  = (float*)mxCalloc(m, sizeof(float));
   intt count = 0;
   for(int i = 0; i < m; i++){
       ones[i]  = 1;
       diagD[i] = 0.5*D[count];
       count    += (m+1);
   }
   cblas_ssyr2(CblasColMajor,CblasUpper,m,-1,diagD,1,ones,1,D,m);
   mxFree(diagD);
   mxFree(ones);

   // W = exp(D) //
   mwSize odims[2]  = {m,m};
   plhs[0] = mxCreateNumericArray(2, odims, mxSINGLE_CLASS, mxREAL);
   float *W = (float*)mxGetPr( plhs[0] );
   vsExp(m*m, D, W);
   mxFree(D);

   mkl_set_dynamic(mkldy);
}

I put all the header files in the same folder can try to compile the code, it reports error

Pxx_mex.cpp:(.text+0x7f): undefined reference
to `MKL_Get_Dynamic'

I think I use the wrong way to use Intel mkl library, so there is a compile error. How to fix this problem?

k606.wang
  • 1
  • That looks like a linker problem, did you already compile the libraries and link them correctly? – arc_lupus Mar 17 '16 at 06:00
  • Thank you for reply. I am sure I have compile and link all the libraries but it still doesn`t work. This programme is downloaded and I think it may be caused by the compiler. – k606.wang Mar 18 '16 at 03:27
  • How does your compilation command look like? You might need to link the libraries to the compiler with `-l` – arc_lupus Mar 18 '16 at 06:46

0 Answers0