Mex compilation macro

Question

I wish to include a certain header file only when my code is compiled via the mex command in Matlab. If it's compiled directly with Visual Studio I do not want it included.

Is there a macro that can help with that?

I'd like to do something of this sort:

#ifdef MEX_COMPILE_FLAG
#include "mexDependent.h"
#end

Answer 1

You can use the macro MATLAB_MEX_FILE for this. To get mex.h to work properly, this macro must be defined if and only if the compiled object will eventually be linked into a mex file. So the mex command makes sure to always define it when it calls the compiler.