cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/O_RDWR.c -o stdlib/O_RDWR -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lgdbm_compat -lcrypt -latomic
stdlib/O_RDWR.c:8:17: error: ‘O_RDWR’ undeclared here (not in a function)
    8 | int const foo = O_RDWR;
      |                 ^~~~~~