Matlab include files giving compilation errors

Hello,

I have seen many related questions but no one could answer my case I think.

I'm trying to call the Matlab Engine in a cpp code.

I includes the header files in the code and I made the following simple makefile:

Test: Test.cpp

g++ -g Test.cpp -I/matlabroot/extern/include/ -L/matlabroot/extern/bin/maci64/ -lMatlabDataArray -lMatlabEngine -o Test

However the compilation fails. I get a lot of errors and warnings that seem to suggest that the matlab files contain mistakes?

For example I get errors like this:

/matlabroot/extern/include/MatlabDataArray/GetArrayType.hpp:50:61: error: a space is required between consecutive right angle brackets (use '> >')

template<> struct GetArrayType<std::complex<uint16_t>> { static const ArrayType type = ArrayType::COMPLEX_UINT16; };

I think a similar problem was met in this thread: https://www.mathworks.com/matlabcentral/answers/463726-error-with-matlab-engine-data-api-for-c-edit-resolved

In that case it was resolved by changing the Conformance Mode parameter in Visual Studio but I'm using Mac and I don't know how I should modify my makefile. I couldn't find much information about what the conformance mode actually means.

Also it's worth noting that the compilation works fine on Matlab with the command mex. However I plan to add more libraries to my cpp code and I don't think I can include them from Matlab.

Btw, I'm a physics student and I have very little background in these matters so please excuse me if I'm doing some obvious mistake.

Answer 1

[Pratyush]

Hi Emmanouil,

To resolve the compilation errors you're facing when calling the Matlab Engine in C++ on a Mac, you should specify the C++ standard version (C++11 or newer) in your makefile. This is because the errors suggest compatibility issues with older C++ standards, which require a space between consecutive right angle brackets in template declarations—a requirement removed in C++11 onwards. Update your makefile to include the '-std=c++11' flag (or a later standard if necessary) with 'g++' to ensure compatibility with the Matlab headers. Here's the updated line for your makefile:

g++ -std=c++11 -g Test.cpp -I/matlabroot/extern/include/ -L/matlabroot/extern/bin/maci64/ -lMatlabDataArray -lMatlabEngine -o Test

This adjustment directs 'g++' to compile your code using the C++11 standard, potentially resolving the syntax issues related to template declarations. Adjust the standard ('-std=c++14', '-std=c++17', etc.) as needed based on your code and the Matlab headers' requirements.