cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations wctype/iswalnum_l.c -o wctype/iswalnum_l -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
wctype/iswalnum_l.c:5:32: error: ‘iswalnum_l’ undeclared here (not in a function); did you mean ‘iswalnum’?
    5 | int (*foo)(wint_t, locale_t) = iswalnum_l;
      |                                ^~~~~~~~~~
      |                                iswalnum