How to determine which libraries to include when using Matlab C++ API?

Question

Matt on 3 Jan 2019

0
Link

Direct link to this question

https://au.mathworks.com/matlabcentral/answers/438173-how-to-determine-which-libraries-to-include-when-using-matlab-c-api

Commented: Siddharth Bhutiya on 8 Jan 2019

Given the example file matcreat.cpp on linux with GCC and Matlab installed correctly. I can link with

.... -L<matlab_root>/bin/glnxa64/ -Wl, -rpath,<matlab_root>/bin/glnxa64/ .... -lmx -lmex -lmat -lm

The resulting executable will work as intended. However, how do I know that I chose the correct libraries? If I remove all but -lmat I will receive "undefined reference to symbol 'mxCreateDoubleMatrix@@v7.3'. This appears to be something in the mxArray set of functions so I added -lmx and all the errors are resolved. The code compiles correctly and the output is as expected. I assume from this that -lmex -lm are extra and not needed, or found by the linker per normal processing. If I compile this same code with no libraries I get the following.

...: undefined reference to `mxCreateDoubleMatrix'
...: undefined reference to `mxGetPr'
...: undefined reference to `mxCreateDoubleMatrix'
...: undefined reference to `mxGetPr'
...: undefined reference to `mxCreateString'
...: undefined reference to `matOpen'
...: undefined reference to `matPutVariable'
...: undefined reference to `matPutVariable'
...: undefined reference to `matPutVariable'
...: undefined reference to `mxDestroyArray'
...: undefined reference to `mxDestroyArray'
...: undefined reference to `mxDestroyArray'
...: undefined reference to `matClose'

My question is what is the documentation or reference to tell me that I need to link against -lmat and -lmx for my code? And by extension which libraries to use for other features like the engine.