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Undefined symbols "_getnumcores", referenced from: _imhist in imhist.o

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Katelyn Gan
Katelyn Gan 2019-12-10
评论： Ashish Uthama 2019-12-11
I use matlab coder to generated the C code and call the function on my MAC running Catalina. Here is the error I got:
"Undefined symbols for architecture x86_64:
"_getnumcores", referenced from: _imhist in imhist.o
"_tbbhist_uint8", referenced from: _imhist in imhist.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)"
"imhist.h":
/*
* File: imhist.h
*
* MATLAB Coder version : 4.3
* C/C++ source code generated on : 12-Nov-2019 16:11:33
*/
#ifndef IMHIST_H
#define IMHIST_H
/* Include Files */
#include <stddef.h>
#include <stdlib.h>
#include "rtwtypes.h"
#include "SkyDetection_RGB_types.h"
/* Function Declarations */
extern void imhist(const emxArray_uint8_T *varargin_1, double yout[256]);
#endif
"imhist.c":
/*
* File: imhist.c
*
* MATLAB Coder version : 4.3
* C/C++ source code generated on : 12-Nov-2019 16:11:33
*/
/* Include Files */
#include "imhist.h"
#include "SkyDetection_RGB.h"
#include "libmwgetnumcores.h"
#include "libmwtbbhist.h"
#include "rt_nonfinite.h"
#include <string.h>
/* Function Definitions */
/*
* Arguments : const emxArray_uint8_T *varargin_1
* double yout[256]
* Return Type : void
*/
void imhist(const emxArray_uint8_T *varargin_1, double yout[256])
{
double numCores;
boolean_T nanFlag;
double localBins1[256];
boolean_T rngFlag;
double localBins2[256];
double localBins3[256];
int i;
int localBins2_tmp;
if (varargin_1->size[0] == 0) {
memset(&yout[0], 0, 256U * sizeof(double));
} else {
numCores = 1.0;
getnumcores(&numCores);
if ((varargin_1->size[0] > 500000) && (numCores > 1.0)) {
nanFlag = false;
rngFlag = false;
tbbhist_uint8(&varargin_1->data[0], (double)varargin_1->size[0], (double)
varargin_1->size[0], 1.0, yout, 256.0, 256.0, &rngFlag,
&nanFlag);
} else {
memset(&yout[0], 0, 256U * sizeof(double));
memset(&localBins1[0], 0, 256U * sizeof(double));
memset(&localBins2[0], 0, 256U * sizeof(double));
memset(&localBins3[0], 0, 256U * sizeof(double));
for (i = 0; i + 4 <= varargin_1->size[0]; i += 4) {
localBins1[varargin_1->data[i]]++;
localBins2_tmp = varargin_1->data[i + 1];
localBins2[localBins2_tmp]++;
localBins2_tmp = varargin_1->data[i + 2];
localBins3[localBins2_tmp]++;
localBins2_tmp = varargin_1->data[i + 3];
yout[localBins2_tmp]++;
}
while (i + 1 <= varargin_1->size[0]) {
yout[varargin_1->data[i]]++;
i++;
}
for (i = 0; i < 256; i++) {
yout[i] = ((yout[i] + localBins1[i]) + localBins2[i]) + localBins3[i];
}
}
}
}
  2 个评论
Ashish Uthama
Ashish Uthama 2019-12-11
I would recommend contacting support with the repro steps (source code+config that you use to generate code), including the OS info you mention and the MATLAB version.

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