cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/VT0.c -o termios/VT0 -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
termios/VT0.c:8:17: error: 'VT0' undeclared here (not in a function)
 int const foo = VT0;
                 ^~~