About mex function problem

6 次查看（过去 30 天）
thu nguyen
thu nguyen 2019-12-1
评论： Rahul Pathak 2020-5-8
Hi everyone,
I recieved the code using mex function. When I run it on Matlab, it occured errors as below
Error using mex
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x0):
multiple definition of `vsnprintf'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x3b0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x10):
multiple definition of `getc'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x3c0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x40):
multiple definition of `putc'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x3f0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x70):
multiple definition of `getchar'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x420): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0xa0):
multiple definition of `putchar'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x450): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0xe0):
multiple definition of `fopen64'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x490): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0xf0):
multiple definition of `ftello64'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x4a0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x120):
multiple definition of `vsnwprintf'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x4d0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x130):
multiple definition of `strtof'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x4e0): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x150):
multiple definition of `wcstof'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x500): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x170):
multiple definition of `_Exit'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x520): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x180):
multiple definition of `llabs'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x530): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1a0):
multiple definition of `atoll'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x550): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1b0):
multiple definition of `lltoa'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x560): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1c0):
multiple definition of `ulltoa'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x570): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1d0):
multiple definition of `wtoll'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x580): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1e0):
multiple definition of `lltow'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x590): first defined here
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\c_mexapi_version.obj:c_mexapi_version.c:(.text+0x1f0):
multiple definition of `ulltow'
C:\Users\BAO_MA~1\AppData\Local\Temp\mex_85703934924329_1184\lbfgsC.obj:lbfgsC.c:(.text+0x5a0): first defined here
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libm.a when searching for -lm
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmingw32.a when searching for -lmingw32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmoldname.a when searching for -lmoldname
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmingwex.a when searching for -lmingwex
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmsvcrt.a when searching for -lmsvcrt
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libuser32.a when searching for -luser32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libkernel32.a when searching for -lkernel32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libadvapi32.a when searching for -ladvapi32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libshell32.a when searching for -lshell32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmingw32.a when searching for -lmingw32
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmoldname.a when searching for -lmoldname
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmingwex.a when searching for -lmingwex
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
skipping incompatible C:/HEN_HOUSE/gnu/lib\libmsvcrt.a when searching for -lmsvcrt
C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/mingw_w64.instrset/bin/../lib/gcc/x86_64-w64-mingw32/6.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
i386 architecture of input file `C:/HEN_HOUSE/gnu/lib/dllcrt2.o' is incompatible with i386:x86-64 output
C:/HEN_HOUSE/gnu/lib/dllcrt2.o: In function `__dll_exit':
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:140: undefined reference to `_free'
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:148: undefined reference to `_fflush'
C:/HEN_HOUSE/gnu/lib/dllcrt2.o: In function `DllMainCRTStartup':
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:87: undefined reference to `_DllMain@12'
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:56: undefined reference to `_malloc'
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:67: undefined reference to `__pei386_runtime_relocator'
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:74: undefined reference to `___main'
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:59: undefined reference to `__errno'
C:/HEN_HOUSE/gnu/lib/dllcrt2.o: In function `atexit':
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:166: undefined reference to `___dllonexit'
C:/HEN_HOUSE/gnu/lib/dllcrt2.o: In function `_onexit':
d:/src/mingw/build/runtime/../../runtime/dllcrt1.c:182: undefined reference to `___dllonexit'
collect2.exe: error: ld returned 1 exit status
I tried to understand it and fixed but I did not resolve.
I also represented the code here.
#include <math.h>
#include "mex.h"
/* See lbfgs.m for details! */
/* This function may not exit gracefully on bad input! */
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
/* Variable Declarations */
double *s, *y, *g, *H, *d, *ro, *alpha, *beta, *q, *r;
int nVars,nSteps,lhs_dims[2];
double temp;
int i,j;
/* Get Input Pointers */
g = mxGetDoubles(prhs[0]);
s = mxGetDoubles(prhs[1]);
y = mxGetDoubles(prhs[2]);
H = mxGetDoubles(prhs[3]);
/* Compute number of variables (p), rank of update (d) */
nVars = mxGetDimensions(prhs[1])[0];
nSteps = mxGetDimensions(prhs[1])[1];
/* Allocated Memory for Function Variables */
ro = mxCalloc(nSteps,sizeof(double));
alpha = mxCalloc(nSteps,sizeof(double));
beta = mxCalloc(nSteps,sizeof(double));
q = mxCalloc(nVars*(nSteps+1),sizeof(double));
r = mxCalloc(nVars*(nSteps+1),sizeof(double));
/* Set-up Output Vector */
lhs_dims[0] = nVars;
lhs_dims[1] = 1;
plhs[0] = mxCreateNumericArray(2,lhs_dims,mxDOUBLE_CLASS,mxREAL);
d = mxGetDoubles(plhs[0]);
/* ro = 1/(y(:,i)'*s(:,i)) */
for(i=0;i<nSteps;i++)
{
temp = 0;
for(j=0;j<nVars;j++)
{
temp += y[j+nVars*i]*s[j+nVars*i];
}
ro[i] = 1/temp;
}
/* q(:,k+1) = g */
for(i=0;i<nVars;i++)
{
q[i+nVars*nSteps] = g[i];
}
for(i=nSteps-1;i>=0;i--)
{
/* alpha(i) = ro(i)*s(:,i)'*q(:,i+1) */
alpha[i] = 0;
for(j=0;j<nVars;j++)
{
alpha[i] += s[j+nVars*i]*q[j+nVars*(i+1)];
}
alpha[i] *= ro[i];
/* q(:,i) = q(:,i+1)-alpha(i)*y(:,i) */
for(j=0;j<nVars;j++)
{
q[j+nVars*i]=q[j+nVars*(i+1)]-alpha[i]*y[j+nVars*i];
}
}
/* r(:,1) = q(:,1) */
for(i=0;i<nVars;i++)
{
r[i] = H[0]*q[i];
}
for(i=0;i<nSteps;i++)
{
/* beta(i) = ro(i)*y(:,i)'*r(:,i) */
beta[i] = 0;
for(j=0;j<nVars;j++)
{
beta[i] += y[j+nVars*i]*r[j+nVars*i];
}
beta[i] *= ro[i];
/* r(:,i+1) = r(:,i) + s(:,i)*(alpha(i)-beta(i)) */
for(j=0;j<nVars;j++)
{
r[j+nVars*(i+1)]=r[j+nVars*i]+s[j+nVars*i]*(alpha[i]-beta[i]);
}
}
/* d = r(:,k+1) */
for(i=0;i<nVars;i++)
{
d[i]=r[i+nVars*nSteps];
}
/* Free Memory */
mxFree(ro);
mxFree(alpha);
mxFree(beta);
mxFree(q);
mxFree(r);
}
I have been using Matlab 2019b and mexw64.
Anybody can help me. Thank you so much.
Thu Nguyen
  9 个评论
显示 7更早的评论
thu nguyen
thu nguyen 2020-4-20
I have not fixed the problem yet.
Can you help me to solve this?
Thank you for your consideration.
Rahul Pathak
Rahul Pathak 2020-5-8
I am also facing the similar type of problem and I am working on 2019b ver.
Kindly help me.

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回答（1 个）

James Tursa
James Tursa 2020-4-25
This code is incorrect:
int nVars,nSteps,lhs_dims[2];
:
plhs[0] = mxCreateNumericArray(2,lhs_dims,mxDOUBLE_CLASS,mxREAL);
The int type is almost certainly a 32-bit integer on your system, but for 64-bit compiles that dimension array needs to be mwSize (which probably converts to a 64-bit size_t integer type). So a mismatch. The code needs to be this:
mwSize lhs_dims[2];

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