https://au.mathworks.com/help/coder/ref/coder.make.buildtool.adddirective.html
coder.make.BuildTool.addDirective - Add directive to Directives - MATLAB
This MATLAB function creates a named directive, assigns a value to it, and adds it to coder.make.BuildTool.Directives.
codermakebuildtooladddirective