cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations dirent/posix_getdents.c -o dirent/posix_getdents -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
dirent/posix_getdents.c:5:44: error: use of undeclared identifier 'posix_getdents'
ssize_t (*foo)(int, void *, size_t, int) = posix_getdents;
                                           ^
1 error generated.