cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/FFDLY.c -o termios/FFDLY -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
termios/FFDLY.c:8:17: error: 'FFDLY' undeclared here (not in a function); did you mean 'TABDLY'?
 int const foo = FFDLY;
                 ^~~~~
                 TABDLY