MATLAB CREATE DLL: The command 'link' exited with a return value '1'

PROBLEM: WANT TO USE A MATLAB DLL IN LABVIEW

ISSUE: BELOW ERR

    Building with 'Microsoft Visual C++ 2017 (C)'.
    cl /c -MD -Zp8 -GR -W3 -EHsc- -Zc:wchar_t- -nologo -O2 -DNDEBUG /DMATLAB_DEFAULT_RELEASE=R2017b  /DUSE_MEX_CMD   /DMSVC /DIBMPC /D_CRT_SECURE_NO_DEPRECATE -I"D:\Program Files\MATLAB\R2020a\extern\include" -I"D:\Program Files\MATLAB\R2020a\extern\include\win64" "C:\Users\SHUBHAM\Documents\MATLAB\examplescriptdll\exampleWrapper.c" /FoC:\Users\SHUBHAM\AppData\Local\Temp\mex_18529067976172_19860\exampleWrapper.obj
    exampleWrapper.c
    
    link "/nologo /manifest /DLL -called_from_matlab    C:\Users\SHUBHAM\AppData\Local\Temp\mex_18529067976172_19860\exampleWrapper.obj  exampleScript.lib  /MACHINE:AMD64 /LIBPATH:"D:\Program Files\MATLAB\R2020a\extern\lib\win64\microsoft" mclmcrrt.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /out:exampleWrapper.exe
    Error using mbuild (line 166)
    Unable to complete successfully.
    The command 'link' exited with a return value '1'

I TRIED: https://forums.ni.com/t5/Example-Code/Walkthrough-for-Creating-a-MATLAB-DLL-That-Can-Be-Called-in/ta-p/3882891?profile.language=en

to create a DLL file and use it in Labview

this is my exampleScript.m file

    function [sumone]=exampleScript(arr)
    sumone=arr+1;
    end

I used this command to create DLL files

    mcc -v -B csharedlib:exampleScript exampleScript.m

and as written in doc[ATTACHMENT] that

This is not a native C type, which is what LabVIEW knows how to interface with. LabVIEW does not

know what to do with these types, which will pose problems for us later.

so they said to use this command

    mbuild -v exampleWrapper.c exampleScript.lib LINKFLAGS="$LINKFLAGS /DLL
    /DEF:exampleWrapper.def" LDEXT=".dll"" CMDLINE250="mt -outputresource:$EXE';'2 -
    manifest $MANIFEST"

while creating 3 new files exampleWrapper.C, exampleWrapper.h, exampleWrapper.def

exampleWrapper.c

    #include<stdio.h>
    #include "exampleScript.h"

    void loadExampleScript(void) {
    	exampleScriptInitialize();
    }
    
    void unloadExampleScript(void) {
    	exampleScriptTerminate();
    }
    
    int wmlfExampleScript(double* c2dArray, int numRows, int numColumns){        
    	int nargout=1;
    	int result=1;
    	mxArray *mIn2dArray;
    	mxArray *mOut2Array=NULL;
        mIn2dArray=mxCreateDoubleMatrix(numRows, numColumns, mxREAL);
    	memcpy(mxGetPr(mIn2dArray), c2dArray, numRows*numColumns*sizeof(double));
    	result=mlfExampleScript(nargout, &mOut2Array, mIn2dArray);
        memcpy(c2dArray, mxGetPr(mOut2Array), numRows*numColumns*sizeof(double));
    	mxDestroyArray(mIn2dArray);
    	mxDestroyArray(mOut2Array);
    	return result;
    }

exampleWrapper.h

    void loadExampleScript(void);
    void unloadExampleScript(void);
    int wmlfExampleScript(double* c2dArray, int numRows, int numColumns);

exampleWrapper.def

    LIBRARY exampleWrapper
    EXPORTS
    loadExampleScript
    unloadExampleScript
    wmlfExampleScript

Answer 1

[shubham kumar gupta]

Running it in a single line solev this issue 😂

mbuild -v exampleWrapper.c exampleScript.lib LINKFLAGS="$LINKFLAGS /DLL /DEF:exampleWrapper.def" LDEXT=".dll" CMDLINE250="mt -outputresource:$EXE';'2 -manifest $MANIFEST"