How to call matlab generated function from c program?

Question

Nanda Thanigaivelan 2020-12-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/694075-how-to-call-matlab-generated-function-from-c-program

评论： Nanda Thanigaivelan 2020-12-17

Hi,

I am new to Matlab coder and would like to use generated functions in a project. I wrote few function implementations, say

objects = fuse_detections(frame_r, frame_c, ldr, ts)

in matlab and generated c code using Matlab coder. C code for the function implementations are generated successfully. I want to call the generated functions, by passing arguments and get values, from an other c program (which is a normal c program). I am aware that I should link generated object files (.o files) with the c program in order to use those functions. I did link .o files and .c files using ninja. How do I call those generated functions from my c program?

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Answer 1

Darshan Ramakant Bhat 2020-12-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/694075-how-to-call-matlab-generated-function-from-c-program#answer_575760

You have to include the appropriate header files which contains the generated function declaration. Then you can directly call those functions from your other C/C++ coder. While compiling the entire application, you need to link the library appropriately.

Below document explains how to use the generated dll in Visual Studio and how to call it in a new C/C++ coder :

https://www.mathworks.com/help/coder/ug/use-a-c-dynamic-library-in-microsoft-visual-studio-project.html

You can also generate a sample example main file and take a look at it on how to use the generated functions :

https://www.mathworks.com/help/coder/ug/generate-an-example-cc-main-function.html

https://www.mathworks.com/help/coder/ug/structure-of-example-cc-main-function.html

Hope this will be helpful

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Nanda Thanigaivelan 2020-12-17

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Thanks for your reply.

I followed the instructions for generating code as dll and used with VS 2019. It did worked as expected. Unfortunately, our deployement system is linux. So I tried to generate code using Matlab coder for library along with main file. I also assigned generate and compile option in order to create output for the generated main file. When I tried to run the complied main file, i.e., main.o, in the terminal, it returned permission denied, then tried execute as superuser, it returned command not found. I also tried chmod +x but it returned cannot execute binary file, exec format error.

I used the following configuration for code generation

cnfig = coder.config('lib');
cnfig.GenerateExampleMain = 'GenerateCodeAndCompile'; 
cnfig.GenerateReport = true;
codegen -config cnfig function_x1 -args params

May I know what went wrong here?

How do I solve this issue?

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