cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wchar/fputws.c -o wchar/fputws -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lintl -liconv
wchar/fputws.c:5:55: error: ‘fputws’ undeclared here (not in a function)
    5 | int (*foo)(const wchar_t *restrict, FILE *restrict) = fputws;
      |                                                       ^~~~~~