Undefined symbol errors while calling magma from mex file ?

versions: intel/2018.3, cuda/10.0.130, magma/2.4.0, matlab/2018b

Below, I have added my mex-magma file 'my_magma.c'

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "mex.h"
#include <cuda.h>  // for CUDA_VERSION

// includes, project
#include "flops.h"
#include "magma_v2.h"
//#include "magma_lapack.h"
#include "testings.h"


/*#if defined(_OPENMP)
#include <omp.h>
#include "../control/magma_threadsetting.h"  // internal header
#endif*/



void mexFunction(int nlhs, mxArray *plhs[], int nrhs,const mxArray *prhs[]) 
    {
    
    // Get input variables from Matlab (host variables).
    
    double *A;
    // Get dimensions of input variables from Matlab.
    int m, n,k;
    const mwSize *Adims;
    Adims = mxGetDimensions(prhs[0]);
    m = Adims[0];
    n = Adims[1];
    //k = Adims[2];
    A = mxGetPr(prhs[0]);
    k = (int)*mxGetPr(prhs[1]);
	magma_init() ;
    magma_print_environment();

    real_Double_t    gflops, magma_perf, magma_time, cublas_perf=0, cublas_time=0, cpu_perf, cpu_time;
    double           magma_error, cublas_error, magma_error2, cublas_error2;

    double *h_A, *h_R, *h_Amagma, *tau, *h_work, tmp[1], unused[1];
    double *d_A, *dtau_magma, *dtau_cublas;

    double **dA_array = NULL;
    double **dtau_array = NULL;
    magma_queue_t queue = NULL ;
    magma_int_t dev =0;
    magma_queue_create (dev ,& queue );
    magma_int_t   *dinfo_magma, *dinfo_cublas;

    magma_int_t M, N, lda, ldda, lwork, n2, info, min_mn;
    magma_int_t ione     = 1;
    magma_int_t ISEED[4] = {0,0,0,1};
    int status = 0;

    magma_int_t batchCount;
    magma_int_t column;

    //magma_opts opts( MagmaOptsBatched );
    //opts.parse_opts( argc, argv );
    batchCount = k;
    
}

When I compile it,

>>mex my_magma.c -DADD_ -lmagma_sparse -lmagma -lcublas -lcudart

Building with 'gcc'.

Warning: You are using gcc version '7.3.0'. The version of gcc is not supported. The version currently supported with MEX is '6.3.x'. For a list of currently supported compilers see:

https://www.mathworks.com/support/compilers/current_release.

MEX completed successfully.

After compiling, I am calling from matlab (example.m), that has the lines below,

A=rand(10,10);
A=my_magma(A);

When I do this, I got the following error

>> example

Invalid MEX-file '/home/my_magma.mexa64':

/cvmfs/soft.computecanada.ca/easybuild/software/2017/Core/ifort/2018.3.222/compilers_and_libraries_2018.3.222/linux/compiler/lib/intel64/libirng.so: undefined symbol:

__intel_skx_avx512_memcpy.

To solve this error, I used

export LD_PRELOAD=//cvmfs/soft.computecanada.ca/easybuild/software/2017/Core/ifort/2018.3.222/compilers_and_libraries_2018.3.222/linux/compiler/lib/intel64/libirc.so

After solving this error, i again got " undefined symbol" error, which is stated below

>>example

Invalid MEX-file '/home/naveen/Matlab/Mexcuda2019-03-16/mex_magma_qr.mexa64':

/cvmfs/soft.computecanada.ca/easybuild/software/2017/avx2/CUDA/intel2018.3/cuda10.0/magma/2.4.0/lib/libmagma.so: undefined symbol: __svml_copysignf4.

Can anyone provide me with a solution to this issue.

[Walter Roberson]

Your first solution might perhaps not have been correct for the situation. See https://www.mathworks.com/matlabcentral/answers/403234-matlab-not-starting-on-ubuntu-18-04-with-intel-compilers#answer_322792