Problem with MKL and MEX

Anas_A_ — Tue, 01 Apr 2014 18:22:35 GMT

I am trying to write a mex programm but it gives errors. When I use the VS2012 the code runs, but when I converted it to mex it didn't work. The code gives errors when it tries to use the mkl library (function dcopy, dgemm etc).

I have installed the Composer XE 2013 SP1 and I use this command to compile the code

mex -largeArrayDims ads.c -I"C:\Program Files (x86)\Intel\Composer XE 2013 SP1\mkl\include" -L"C:\Program Files (x86)\Intel\Composer XE 2013 SP1\mkl\lib\intel64" -lmkl_intel_lp64 -lmkl_intel_thread -lmkl_core -lmkl_blas95_lp64 -lmkl_intel_ilp64 -lmkl_sequential -lmkl_blas95_lp64

For example I tried to use the function dcopy and the code and erros are:

#include <math.h>               
#include <stdio.h>             
#include <stdlib.h>           
#include <mkl.h>
#include "mkl_vml.h"
#include "mex.h"
#include "matrix.h"
#include "mkl_vsl.h"


void mexFunction(int nlhs,  mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    double a[4]={1,2,3,4};
    double b[4];
    cblas_dcopy(4, a, 1, b, 1);

    return;
}

Errors:

>> mex -largeArrayDims ads.c -I"C:\Program Files (x86)\Intel\Composer XE 2013 SP1\mkl\include" -L"C:\Program Files (x86)\Intel\Composer XE 2013 SP1\mkl\lib\intel64" -lmkl_intel_lp64 -lmkl_intel_thread -lmkl_core -lmkl_blas95_lp64 -lmkl_intel_ilp64 -lmkl_sequential -lmkl_blas95_lp64
Creating library C:\Users\F9E9~1\AppData\Local\Temp\mex_VlIT6Y\templib.x and object C:\Users\F9E9~1\AppData\Local\Temp\mex_VlIT6Y\templib.exp
mkl_intel_thread.lib(mkl_threading.obj) : error LNK2019: unresolved external symbol omp_in_parallel referenced in function mkl_serv_get_max_threads
mkl_intel_thread.lib(mkl_threading.obj) : error LNK2019: unresolved external symbol omp_get_max_threads referenced in function mkl_serv_get_max_threads
mkl_intel_thread.lib(mkl_threading.obj) : error LNK2019: unresolved external symbol omp_get_num_procs referenced in function mkl_serv_get_N_Cores
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_global_thread_num referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_ok_to_fork referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_push_num_threads referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_fork_call referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_serialized_parallel referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol __kmpc_end_serialized_parallel referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol omp_get_thread_num referenced in function mkl_blas_dcopy_omp
mkl_intel_thread.lib(dcopy_omp.obj) : error LNK2019: unresolved external symbol omp_get_num_threads referenced in function mkl_blas_dcopy_omp
ads.mexw64 : fatal error LNK1120: 11 unresolved externals

C:\USERS\F9E9~1\DOCUME~1\MATLAB~1\BIN\MEX.PL: Error: Link of 'ads.mexw64' failed.

I would like to ask if you could help me to fix the errors.

Thank you very much.

This is a known issue. The

Zhang_Z_Intel — Tue, 01 Apr 2014 22:14:48 GMT

This is a known issue. The fix will be available in the next MKL release (version 11.1 update 3), which is due in about one month.

topic This is a known issue. The in Intel® oneAPI Math Kernel Library

Problem with MKL and MEX

This is a known issue. The