C中未定义的mat.h参考文献

Question

我正在尝试运行matlab外部examples目录中examples文件夹中的示例代码。

/*
* 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...nn", 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 mxCreateDoubleMatrixn");
return(EXIT_FAILURE);
}
memcpy((void *)(mxGetPr(pVarNum)), (void *)extData, sizeof(extData));
pVarChar = mxCreateString(extString);
if (pVarChar == NULL) {
printf("Unable to create mxArray with mxCreateStringn");
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("Donen");
return(EXIT_SUCCESS);
}

但我得到以下错误：

> c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x6b): undefined reference to `matOpen_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0xa8): undefined reference to `mxCreateDoubleMatrix_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0xd5): undefined reference to `mxGetPr_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0xfb): undefined reference to `mxCreateString_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x138): undefined reference to `matPutVariable_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x17d): undefined reference to `matPutVariable_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x1af): undefined reference to `matClose_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x1da): undefined reference to `mxDestroyArray_800'
c:/mingw/bin/../lib/gcc/mingw32/8.2.0/../../../../mingw32/bin/ld.exe: C:UsersaashiAppDataLocalTempccCh9dHA.o:main.c:(.text+0x1e6): undefined reference to `mxDestroyArray_800'
collect2.exe: error: ld returned 1 exit status

我使用GCC编译这个程序如下：

gcc main.c -IC:/Progra~1/MATLAB/R2019a/extern/include -LC:Progra~1MATLABR2019aexternlib -LC:Progra~1MATLABR2019abinwin64libmat.dll -o output

有什么帮助吗？

Answer 1

您需要在gcc命令中追加-lmx或添加-lC:Pathtolibmx.dll。您可能还需要-lmex -lm