cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations dirent/readdir_r.c -o dirent/readdir_r -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
dirent/readdir_r.c:6:80: error: ‘readdir_r’ undeclared here (not in a function); did you mean ‘readdir’?
    6 | int (*foo)(DIR *restrict, struct dirent *restrict, struct dirent **restrict) = readdir_r;
      |                                                                                ^~~~~~~~~
      |                                                                                readdir