How to compile matlab library with C including openmp?

Using mbuild to compile my C code reports the following error: Unknown MEX argument '-fopenmp'. I'm wondering how to integrate the matlab library into my C code including openmp?

[Walter Roberson]

You need to be careful with this; see https://www.mathworks.com/matlabcentral/answers/362692-is-it-possible-make-parallel-processing-using-mex-and-openmp-on-matlab#answer_287564

Answer 1

[Walter Roberson]

This question was brought to an uncertain resolution in https://www.mathworks.com/matlabcentral/answers/373649-mex-file-maker-not-working-when-using-thread-header

If you are using Visual Studio then there was a Community Edition that did not support OpenMP. I remember that at some point I listed which version it was but I am not finding the posting at the moment, but see

https://www.mathworks.com/matlabcentral/answers/347147-adding-openmp-compiler-to-matlab-2015b

For MinGW see https://www.mathworks.com/matlabcentral/answers/279171-using-mingw-compiler-and-open-mp#comment_359122

For Mac, see https://www.mathworks.com/matlabcentral/answers/376929-matlab-coder-compiler-does-not-support-openmp-error-using-a-supported-compiler#answer_300335

[Zhe Shen]

Thanks for your answer. Acturally I'm working on Linux and using gcc compiler. I'm trying to call matlab function in my C code integrated with openmp. It seems like matlab mbuild compiler does not support openmp. If it's not how should I compile it?

[Walter Roberson]

For Linux I would use the same approach as on Mac:

mex -v CXXFLAGS="$CXXFLAGS -fopenmp"