Is there widely-available wide-character variant of `__FILE__`?

Question

One may generally use __LINE__ and __FILE__ in C++ programs, with many toolchains, including GCC.

__LINE__ under GCC evaluates

Answer 1

You can make your own WFILE:

#define WIDE2(x) L##x
#define WIDE1(x) WIDE2(x)
#define WFILE WIDE1(__FILE__)