cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations threads/once_flag.c -o threads/once_flag -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lintl -liconv
[cc@relibc::platform::sys:699 INFO] TODO: getrlimit(3, 0x7ffffffffb80): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(3, 0x7ffffffffab0): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffa80): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffab0): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(5, 0x7ffffffffab0): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffa80): not implemented
threads/once_flag.c:1:10: fatal error: threads.h: No such file or directory
    1 | #include <threads.h>
      |          ^~~~~~~~~~~
compilation terminated.