gcc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations fcntl/O_TTY_INIT.c -o fcntl/O_TTY_INIT -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet  -lsocket -latomic
fcntl/O_TTY_INIT.c:3:2: error: #error "O_TTY_INIT is not defined"
    3 | #error "O_TTY_INIT is not defined"
      |  ^~~~~