Comment by 31b3r3t7

No need for runtime polymorphism for this. The same binary won't be used in different operating systems. This is a classic example of misuse of C++ features just because they exist and a reason why I personally prefer programming in C. What I would do in a case like this is to have three source files each implementing the function for UNIX/Windows/Mac and the build system should take care of compiling the right one into the program depending on the OS.