FMU generated by Matlab 2024b shows Matlab shared library dependencies

Hi there,

I have been given an FMU generated by Simulink (Matlab 2024). This is Co-Simulation.

In the past I managed to call the generated FMU from c++ in Linux.

However I received a new FMU which shows the following shared libraries needed when running "readelf -d fmu_library.so"

0x0000000000000001 (NEEDED) Shared library: [libmwsl_cosim_service_deploy.so]

0x0000000000000001 (NEEDED) Shared library: [libmwi18n.so]

0x0000000000000001 (NEEDED) Shared library: [libmwfl.so]

0x0000000000000001 (NEEDED) Shared library: [libmwfoundation_filesystem.so]

0x0000000000000001 (NEEDED) Shared library: [libmex.so]

0x0000000000000001 (NEEDED) Shared library: [libmx.so]

0x0000000000000001 (NEEDED) Shared library: [libmat.so]

0x0000000000000001 (NEEDED) Shared library: [libmwsl_services.so]

0x0000000000000001 (NEEDED) Shared library: [libmwboost_system.so.1.81.0]

0x0000000000000001 (NEEDED) Shared library: [libmwcpp11compat.so]

0x0000000000000001 (NEEDED) Shared library: [libpthread.so.0]

0x0000000000000001 (NEEDED) Shared library: [libstdc++.so.6]

0x0000000000000001 (NEEDED) Shared library: [libgcc_s.so.1]

0x0000000000000001 (NEEDED) Shared library: [libc.so.6]

It was my understanding that Matlab-generated FMUs don't require external dependencies but I can see libmex.so and libmat.so which I guess they are Matlab dependencies. Does it mean I need to install the SDK with the dependencies?

Answer 1

[Kautuk Raj]

Hello @Jose,

Yes, you need the MATLAB/Simulink shared libraries available at runtime.

This is a change from older FMU exports, which often produced "standalone" binaries with all dependencies statically linked or minimal system dependencies.

In your MATLAB installation, make sure the bin/glnxa64 (or similar) directory containing these .so files is in your LD_LIBRARY_PATH.

For deployment without a full MATLAB, you can use MATLAB Runtime: https://www.mathworks.com/products/compiler/matlab-runtime.html

Please refer to the following documentation page from MathWorks from more details: https://www.mathworks.com/help/slcompiler/gs/export-simulink-models-to-functional-mock-up-units.html