Permits or forbids the use of wchar_t.
It does not necessarily fault declarations, providing they are unused.
Use this option to create an object file that is independent of wchar_t size.
If --no_wchar is specified:
wchar_t fields in structure declarations are faulted by the compiler, regardless of whether or not the structure is used.
wchar_t in a typedef is faulted by the compiler, regardless of whether or not the typedef is used.
The default is --wchar.