clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wchar/wcpcpy.c -o wchar/wcpcpy -D_POSIX_C_SOURCE=202405L  -lm  -lintl
wchar/wcpcpy.c:5:63: error: use of undeclared identifier 'wcpcpy'; did you mean 'wcscpy'?
wchar_t *(*foo)(wchar_t *restrict, const wchar_t *restrict) = wcpcpy;
                                                              ^~~~~~
                                                              wcscpy
/usr/include/wchar.h:111:10: note: 'wcscpy' declared here
wchar_t *wcscpy(wchar_t * __restrict, const wchar_t * __restrict);
         ^
1 error generated.