As far as I know there is no possibility to generate C/C++ code from a Level -2 MATLAB S-Function without writing an associated TLC file. I think if you want to design a library with additional code generation support you have 4 possibilities:
- using S-Function blocks and write your functionality only in C/C++ which runs in Simulink and on the target system (non-inlined S-Function)
- using S-Function blocks and write your functionality in C/C++ for running in Simulink and provide a TLC file used by the code generator (fully inlined S-Function)
- using Level 2 MATLAB S-Functions blocks and write your functionality in MATLAB language for running in Simulink and provide a TLC file used by the code generator
- using MATLAB Function block and write your functionality only in MATLAB language for running in Simulink and as input for the code generator. You must ensure that you are using only functions and functionality from MATLAB which are supporting code generation. In this case it is also possible to deliver a .p - file which is "encrypted" but note the generated C/C++ code from such a block is not encrypted
