I called matlab function in C++ and got LNK2001 error.

Hello

C:\Program Files\MATLAB\MATLAB Runtime\v97\extern\lib\win64\mingw64

C:\Program Files\MATLAB\MATLAB Runtime\v97\extern\lib\win64\microsoft

C:\Program Files\MATLAB\MATLAB Runtime\v97\extern\include

C:\Program Files\MATLAB\MATLAB Runtime\v97\bin\win64

C:\Program Files\MATLAB\MATLAB Runtime\v97\lib\win64

C:\Program Files\MATLAB\MATLAB Runtime\v97\runtime\win64

I have already added the above paths to the project.

mclbase.lib, mclcommain.lib, mclmcr.lib, mclmcrrt.lib and mclxlmain.lib were also added.

This causes a LNK2001 unresolved external symbol error in the GT_model function.

The other GT_modelInitialize and mclInitializeApplication functions seem to work well

it seems that lib or dll is added well

GT_model(1, y_pwrOut, inputIn) is not work

i got LNK2001 unrresolved error

I don't know what's wrong.

Thank you for any advice.

Main.cpp

------------------------------------------------------------------------------------

#include <iostream>
#include "GT_model.h"

void GT_modelSample()
{
	mxDouble inputInData[] = { -20.0, 101.325, 0.6, 321.3713, -20.0, 100.8011, 281.3149, 873.2329, 2.5707, 200.0, 49492.4247435387, 357.7379, 121.1334, 357.7379, 102.0625, 0.0, 3600.0 };
	mwArray inputIn(1, 17, mxDOUBLE_CLASS);
	inputIn.SetData(inputInData, 17);
	std::cout << "4\n";
	mwArray y_pwrOut;
	mxArray *plhs;
	mxDouble *prhs;
	try
	{
		
		GT_model(1, y_pwrOut, inputIn);
		std::cout << y_pwrOut << std::endl;
		std::cout << "5\n";
	}
	catch (const mwException & e)
	{
		std::cerr << e.what() << std::endl;
	}
	catch (...)
	{
		std::cerr << "Unexpected error thrown" << std::endl;
	}
}

int run_main(int argc, const char** argv)
{
	std::cout << "2\n";
	if (!GT_modelInitialize())
	{
		std::cerr << "Could not initialize the library properly" << std::endl;
		return -2;
	}
	else
	{
		std::cout << "3\n";
		GT_modelSample();
		std::cout << "6\n";
		// Call the application and library termination routine
		GT_modelTerminate();
		std::cout << "7\n";
	}
	// Note that you should call mclTerminateApplication at the end of
	// your application to shut down all MATLAB Runtime instances.
	mclTerminateApplication();
	std::cout << "8\n";
	return 0;
}

// The main routine. On macOS, the main thread runs the system code, and
// user code must be processed by a secondary thread. On other platforms, 
// the main thread runs both the system code and the user code.
int main(int argc, const char** argv)
{
	/* Call the mclInitializeApplication routine. Make sure that the application
	 * was initialized properly by checking the return status. This initialization
	 * has to be done before calling any MATLAB APIs or MATLAB Compiler SDK
	 * generated shared library functions.
	 */
	if (!mclmcrInitialize()) {
		std::cerr << "Could not initialize the application." << std::endl;
		return -1;
	}
	if (!mclInitializeApplication(nullptr, 0))
	{
		std::cerr << "Could not initialize the application." << std::endl;
		return -1;
	}
	std::cout << "1\n";
	return mclRunMain(static_cast<mclMainFcnType>(run_main), argc, argv);
}

---------------------------------------------------------------------------------

GT_model.h

---------------------------------------------------------------------------------

//
// MATLAB Compiler: 7.1 (R2019b)
// Date: Wed Feb  5 15:51:57 2020
// Arguments:
// "-B""macro_default""-W""cpplib:GT_model,all,version=1.0""-T""link:lib""-d""C:
// \Users\sergey.mishchenko\Desktop\dll
// file\GT_model\for_testing""-v""C:\Users\sergey.mishchenko\Desktop\dll
// file\GT_model.m"
//

#ifndef GT_model_h
#define GT_model_h 1

#if defined(__cplusplus) && !defined(mclmcrrt_h) && defined(__linux__)
#  pragma implementation "mclmcrrt.h"
#endif
#include "mclmcrrt.h"
#include "mclcppclass.h"
#ifdef __cplusplus
extern "C" { // sbcheck:ok:extern_c
#endif

/* This symbol is defined in shared libraries. Define it here
 * (to nothing) in case this isn't a shared library. 
 */
#ifndef LIB_GT_model_C_API 
#define LIB_GT_model_C_API /* No special import/export declaration */
#endif

/* GENERAL LIBRARY FUNCTIONS -- START */

extern LIB_GT_model_C_API 
bool MW_CALL_CONV GT_modelInitializeWithHandlers(
       mclOutputHandlerFcn error_handler, 
       mclOutputHandlerFcn print_handler);

extern LIB_GT_model_C_API 
bool MW_CALL_CONV GT_modelInitialize(void);

extern LIB_GT_model_C_API 
void MW_CALL_CONV GT_modelTerminate(void);

extern LIB_GT_model_C_API 
void MW_CALL_CONV GT_modelPrintStackTrace(void);

/* GENERAL LIBRARY FUNCTIONS -- END */

/* C INTERFACE -- MLX WRAPPERS FOR USER-DEFINED MATLAB FUNCTIONS -- START */

extern LIB_GT_model_C_API 
bool MW_CALL_CONV mlxGT_model(int nlhs, mxArray *plhs[], int nrhs, mxArray *prhs[]);

/* C INTERFACE -- MLX WRAPPERS FOR USER-DEFINED MATLAB FUNCTIONS -- END */

#ifdef __cplusplus
}
#endif


/* C++ INTERFACE -- WRAPPERS FOR USER-DEFINED MATLAB FUNCTIONS -- START */

#ifdef __cplusplus

/* On Windows, use __declspec to control the exported API */
#if defined(_MSC_VER) || defined(__MINGW64__)

#ifdef EXPORTING_GT_model
#define PUBLIC_GT_model_CPP_API __declspec(dllexport)
#else
#define PUBLIC_GT_model_CPP_API __declspec(dllimport)
#endif

#define LIB_GT_model_CPP_API PUBLIC_GT_model_CPP_API

#else

#if !defined(LIB_GT_model_CPP_API)
#if defined(LIB_GT_model_C_API)
#define LIB_GT_model_CPP_API LIB_GT_model_C_API
#else
#define LIB_GT_model_CPP_API /* empty! */ 
#endif
#endif

#endif

extern LIB_GT_model_CPP_API void MW_CALL_CONV GT_model(int nargout, mwArray& y_pwr, const mwArray& input);

/* C++ INTERFACE -- WRAPPERS FOR USER-DEFINED MATLAB FUNCTIONS -- END */
#endif

#endif

---------------------------------------------------------------------------------

[Walter Roberson]

Which symbol is noted as unresolved?

[HYUK MYEONG KWON]

GT_model(1, y_pwrOut, inputIn);

[Walter Roberson]

I see interfaces defined to call GT_model from MATLAB but I do not see you listing any dll or lib that defines GT_model?

[HYUK MYEONG KWON]

GT_model.lib added linker - input

and GT_model.dll in folder

[Walter Roberson]

Would it be possible to post the entire build log?

[HYUK MYEONG KWON]

Severity Code Description Project File Line Suppression Suppression Status

Error (active) E0020 The identifier "mclTerminateApplication" is not defined. SDAS DLL TEST C: \ SDAS DLL TEST \ SDAS DLL TEST \ SDAS DLL TEST.cpp 149

Error LNK2001 "void __cdecl GT_model (int, class mwArray &, class mwArray const &)" (? GT_model @@ YAXHAEAVmwArray @@ AEBV1 @@ Z) The external symbol cannot be resolved. SDAS DLL TEST C: \ SDAS DLL TEST \ SDAS DLL TEST \ SDAS DLL TEST.obj 1

Error LNK1120 One unresolved external reference. SDAS DLL TEST C: \ SDAS DLL TEST \ SDAS DLL TEST \ x64 \ Release \ SDAS DLL TEST.exe 1

[HYUK MYEONG KWON]

mclTerminateApplication is an intellisence error but not a build error

But I'm not sure what causes it