cmake findMatlab - location of matlabConfig.cmake or matlab-config.cmake in the MATLAB installation directory

I am trying to integrate an external C++ function (large package) into a mex function. I have written a cmake file, which generates library for external C++ function and I am using matlab_add_mex to generate the mex-file.

# Find MATLAB

set(Matlab_ROOT_DIR "../mathworks/2023b/bin/")

find_package(Matlab REQUIRED)

# Add a MEX target

matlab_add_mex(

NAME my_mex_function

SRC my_mex_function.cpp

LINK_TO my_library

)

find_package(Matlab REQUIRED) - gives following error:

CMake Error at CMakeLists.txt: (find_package):

By not providing "Findmatlab.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "matlab", but CMake did not find one.

Could not find a package configuration file provided by "matlab" with any of the following names:

matlabConfig.cmake

matlab-config.cmake

Add the installation prefix of "matlab" to CMAKE_PREFIX_PATH or set "matlab_DIR" to a directory containing one of the above files. If "matlab" provides a separate development package or SDK, be sure it has been installed.

I searched for matlabConfig.cmake or matlab-config.cmake in matlab installation directory but did not find it. Does Matlab provide provide such files or not? If not how to integrate large C++ programs with MATLAB. I dont want to use system function calls as they are too slow.

Answer 1

[Maneet Kaur Bagga]

Hi,

As per my understanding, your error is because "matlabConfig.cmake" file is not provided by MATLAB. The possible workaround for the same is as follows:

Write a MEX function in C++ that interfaces with your shared library. This wrapper will handle data conversion between MATLAB and C++ and manage calls to your library functions. Please refer to the following MathWorks documentation for better understanding.

https://in.mathworks.com/help/matlab/cpp-mex-file-applications.html

Alternatively, MATLAB provides a C++ interface that allows you to call functions in a C++ shared library directly from MATLAB. This method involves creating an interface to the library using MATLAB's "clibgen" functionality. Following is the documentation for the same.

https://in.mathworks.com/help/matlab/call-cpp-library-functions.html

Hope this helps!