When generating C code from a Simulink model using Embedded Coder, the code generation process typically includes the “initialize”, “step” and “terminate” functions. However, if one of these functions is empty, there is currently no option to stop it from generating as Simulink mostly generates these functions as part of boiler plate code.
During the build process, “gcc” handles and removes the empty functions automatically as part of optimizations. You can also add custom optimization flags such ‘-O3’ in Simulink using ‘SimCustomCompilerFlags’.
set_param(gcs, 'SimCustomCompilerFlags', '-O3')
If possible, You can then safely remove any check for identifying empty functions from the tool you are using.
A workaround for removing empty functions from generated code can be using a post-processing script. Empty functions can be identified using regular expressions and can be removed. All files are needed to be examined by the script to remove the function calls and function definitions from header files.
You can access the documentation for adding Custom compiler flags and using regular expressions in MATLAB using the following commands.
web(fullfile(docroot, 'simulink/gui/compiler-flags.html'))
web(fullfile(docroot, 'matlab/matlab_prog/regular-expressions.html'))
