In my portable code I #define standard functions like main and fopen to their wide equivalents when building on Windows. This does mean I can't just use char*

In my portable code I #define standard functions like main and fopen to their wide equivalents when building on Windows. This does mean I can't just use char* and unadorned string literals, so I define a tchar type (which is char on Linux and wchar_t on Windows) and an _T() macro for string literals. This mostly works without thinking about it.