cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wchar/wcpcpy.c -o wchar/wcpcpy -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
wchar/wcpcpy.c:5:63: error: 'wcpcpy' undeclared here (not in a function); did you mean 'wcscpy'?
    5 | wchar_t *(*foo)(wchar_t *restrict, const wchar_t *restrict) = wcpcpy;
      |                                                               ^~~~~~
      |                                                               wcscpy