clang -O2   -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   -lintl
fcntl/O_TTY_INIT.c:3:2: error: "O_TTY_INIT is not defined"
#error "O_TTY_INIT is not defined"
 ^
1 error generated.