Undefined references for mat.h in C

I'm trying to run the example code found in the examples folder within matlab's extern examples directory.

/* * Create a simple MAT-file to import into MATLAB. * Calling syntax: * *   matimport * * Simplified version of the matcreat.c program. * See the MATLAB External Interfaces Guide for  * compiling information. * * Copyright 2010 The MathWorks, Inc. */#include <stdio.h>#include <string.h> /* For memcpy() */#include <stdlib.h> /* For EXIT_FAILURE, EXIT_SUCCESS */#include "mat.h"int main() {  /* MAT-file */  MATFile *pmat;  const char *myFile = "matimport.mat";  /* Data from external source */  const char *extString = "Data from External Device";  double extData[9] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0 };  /* Variables for mxArrays  */  mxArray *pVarNum, *pVarChar;  /* MATLAB variable names */  const char *myDouble = "inputArray";  const char *myString = "titleString";  int status;   /* Create and open MAT-file */  printf("Creating file %s...\n\n", myFile);  pmat = matOpen(myFile, "w");  if (pmat == NULL) {    printf("Error creating file");    return(EXIT_FAILURE);  }  /* Create mxArrays and copy external data */  pVarNum = mxCreateDoubleMatrix(3,3,mxREAL);  if (pVarNum == NULL) {      printf("Unable to create mxArray with mxCreateDoubleMatrix\n");      return(EXIT_FAILURE);  }  memcpy((void *)(mxGetPr(pVarNum)), (void *)extData, sizeof(extData));  pVarChar = mxCreateString(extString);  if (pVarChar == NULL) {      printf("Unable to create mxArray with mxCreateString\n");      return(EXIT_FAILURE);  }  /* Write data to MAT-file */  status = matPutVariable(pmat, myString, pVarChar);  if (status != 0) {      printf("Error writing %s.\n", myString);      return(EXIT_FAILURE);  }   status = matPutVariable(pmat, myDouble, pVarNum);  if (status != 0) {      printf("Error writing %s.\n", myDouble);      return(EXIT_FAILURE);  }    if (matClose(pmat) != 0) {    printf("Error closing file %s.\n", myFile);    return(EXIT_FAILURE);  }  /* Clean up */  mxDestroyArray(pVarNum);  mxDestroyArray(pVarChar);  printf("Done\n");  return(EXIT_SUCCESS);}

But I get the following errors:

> c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x6b): undefined reference to `matOpen_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0xa8): undefined reference to `mxCreateDoubleMatrix_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0xd5): undefined reference to `mxGetPr_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0xfb): undefined reference to `mxCreateString_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x138): undefined reference to `matPutVariable_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x17d): undefined reference to `matPutVariable_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x1af): undefined reference to `matClose_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x1da): undefined reference to `mxDestroyArray_800'c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:\Users\aashi\AppData\Local\Temp\ccCh9dHA.o:main.c:(.text+0x1e6): undefined reference to `mxDestroyArray_800'collect2.exe: error: ld returned 1 exit status

I've used GCC to compile this program as follows:

gcc main.c -IC:/Progra~1/MATLAB/R2019a/extern/include -LC:\Progra~1\MATLAB\R2019a\extern\lib -LC:\Progra~1\MATLAB\R2019a\bin\win64\libmat.dll -o output

Any help?