cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations termios/BS0.c -o termios/BS0 -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
termios/BS0.c:8:17: error: 'BS0' undeclared here (not in a function); did you mean 'B0'?
    8 | int const foo = BS0;
      |                 ^~~
      |                 B0