Question

Can we use the wmain() function with Unix compilers or it’ll work only on/for Windows?

Answer 1

The only standard signatures for main are:

int main(void);
int main(int argc, char *argv[]);

However, a freestanding implementation can provide extensions/allow other signatures. But those are not guranteed to be portable. wmain looks like a Windows/VS thing. There’s not much chance this will work on a *nix/GNU GCC.