Code Blocks configuration for Calling Matlab code from C/C++

Question

Nathan 2013-1-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59897-code-blocks-configuration-for-calling-matlab-code-from-c-c

回答： Amir Sin 2018-6-8

Hey Everybody,

I was just trying to go through a simple matlab tutorial for calling matlab code from c/c++ code and Im getting an error:

code:

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include "engine.h"
    int main()
    {
        printf("Hello world");
        Engine *ep;
        ep = engOpen("");
        engEvalString(ep, "x=(1:1:10);");
        engEvalString(ep,"y=x.^2;");
        engEvalString(ep, "plot(x,y);");
        engClose(ep);
    return 1;
    }

Build log(Added new lines to help readability):

mingw32-gcc.exe -Wall -g -Weffc++ -std=c++0x -I"C:\Program Files\MATLAB\R2012b\extern\include" -c C:\Users\Public\Documents\C++\CToMatlab\main.c -o obj\Debug\main.o

mingw32-g++.exe -L"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft"

-o bin\Debug\CToMatlab.exe obj\Debug\main.o

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libeng.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmat.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libemlrt.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmex.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmwblas.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmwblascompat32.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmwlapack.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmwmathutil.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libmx.lib"

"C:\Program Files\MATLAB\R2012b\extern\lib\win64\microsoft\libut.lib"

Error:

undefined reference to `engOpen' undefined reference to `engEvalString' undefined reference to engEvalString undefined reference to `engEvalString' undefined reference to `engClose'

I know that this is a linking error but not sure what I'm failing to link.

Any help would be apreciated.

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Answer 1

Evgeny Pr 2013-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/59897-code-blocks-configuration-for-calling-matlab-code-from-c-c#answer_72429

编辑：Evgeny Pr 2013-1-25

GCC compiler for "MATLAB Externals" is not supported on windows platform. You must use the Microsoft compiler.

...but, unfortunately in CodeBlocks IDE there is a parsing command-line for Microsoft compiler bug.

I think you should use Visual Studio Express. Everything is much easier to configure. Do not forget to specify the path to the libraries and header files to MATLAB extern:

matlabroot\extern\lib\<platform>\microsoft
matlabroot\extern\include\

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Answer 2

Nathan 2013-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/59897-code-blocks-configuration-for-calling-matlab-code-from-c-c#answer_72430

k thanks for the help I'll probably just switch to VS now.

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Answer 3

Tonatiuh Toral 2013-4-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/59897-code-blocks-configuration-for-calling-matlab-code-from-c-c#answer_82393

编辑：Tonatiuh Toral 2013-4-16

Hello! I'm using Code:blocks in Ubuntu 12.10 and want to call Matlab from my C++ code. I have included the matlabroot\extern\include\ in the Search directories of my Code::blocks. I tryed with the engdemo.cpp and I'm getting the same errors.

undefined reference to engOpen
undefined reference to mxCreateDoubleMatrix
...
...

Can anyone help me with the proper configuration for using engine.h in Code::blocks?

Kind Regards!

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Nathan 2013-4-16

http://wiki.codeblocks.org/index.php?title=64Bit_Windows this should help with starting...... after that you still need to specify matlab files on the include and compiler settings.

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